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  • 1.
    Acikkol, Naz
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Testing the Cretaceous Diversity of Ichthyosaurs and Their Extinction Hypotheses Using a Quantitative Approach2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    As portrayed in Before the Dinosaur: the Historical Significance of the Fossil Marine Reptiles, ichthyosaurs, as other Mesozoic marine amniotes, have been unfairly overshadowed by dinosaurs in both popular culture and the field of vertebrate palaeontology. Yet by the effort of dedicated researchers, work on these fish-like marine reptiles had never died out, and in fact a second wave of interest emerged in the late 20th century. Since then, research on ichthyosaurs has focused on discovery of new taxa, assessments of their palaeobiology, and quantitative analyses of their diversity. Despite ever-growing interests, patterns and mechanisms leading up to their extinction in the Cenomanian were insufficiently evaluated. In other words, hypotheses focusing on abrupt extinction linked to a crash in prey diversity, notably belemnites, over a catastrophic event at the end-Cenomanian remain poorly tested. The current project thus aims to test: 1) whether the Cretaceous diversity of ichthyosaurs reflects biological signals, and 2) correlation of their diversity with the diversity of Mesozoic cephalopods, such as belemnites and ammonites. In this regard, a species-level dataset of Cretaceous belemnites including belemnite-bearing formations was built to be employed together with the occurrence-based ichthyosaur and ammonite datasets in the same taxic level. Raw taxic counts, as observed diversities of the clades, were quantified in two different temporal scales, and compared with two sampling proxies. The model-based method was then applied to correct all taxic counts based on the two proxies in both time bins to acquire expected diversities of all the clades. Comparisons resulted in strong correlations between the clades’ observed diversities and proxies exposing biased patterns under the influence of sampling intensity. Whereas both observed and expected diversities show no evidence of a causal relationship between the predator and prey groups, suggesting that the latter’s diversity seems not being a parameter for the former’s, and thus being unsupportive for a prey-driven demise of the predator. Furthermore, the expected trend of ichthyosaurs indicates lower Albian diversity gradually declining towards their extinction in the Cenomanian, which appears to be contrasting with recent studies.

  • 2.
    Adamsson, Karolin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Kollektivtrafikknutpunkter i Göteborg ur ett genusperspektiv2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    This paper will examine two public transportation hubs, as examples of public space, in Gothenburg, Sweden, from a gender perspective by investigate how gender equality is discussed in planning processes of hubs and to explore how hubs are used and perceived by men and women. The thesis has a qualitative and hermeneutic approach, with semi-structured interviews with key persons from the planning processes, and site observations and interviews with men and women using the hubs as the main data gathering methods. In the planning processes for the two cases the ambition was to create hubs that were welcoming for everyone, from a theoretical point of view this ambition could be dangerous from a gender perspective since a planning for everyone often leads to a planning for the man. In order to create hubs for everyone there was a focus for creating safety and increase accessibility for the disabled during the planning processes. The observations and the interviews on site shows that the hubs could be viewed as gender equal since the hubs were open to both men and women to use, but the hubs could also be viewed as not gender equal since women felt unsafe. The analysis shows that the social interaction on site is a crucial factor when defining a place as gender equal or not. The social interaction can be understood by gender contract. One conclusion is that there is a need for discussions about gender and its effect on experiences of public space, where gender contract is problematized. It will otherwise be hard to understand and change the interaction and the gender inequality will risk to consolidate.

  • 3.
    Agic, Heda
    et al.
    Department of Earth Science, University of California at Santa Barbara, Santa Barbara, USA.
    Högström, Anette
    Tromsø Universitetsmuseum.
    Jensen, Sören
    Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
    Ebbestad, Jan Ove R.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Meinhold, Guido
    Geowissenschaftliches Zentrum der Universität Göttingen, Germany.
    Taylor, Wendy L.
    Department of Geological Sciences, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa.
    Palacios, Teodor
    Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
    Høyberget, Magne
    Rennesveien 14, N-4513 Mandal, Norway.
    Life through the 'Varanger ice ages': microfossil record of late Neoproterozoic glacial-interglacial units from arctic Norway2018Inngår i: Geological Society of America Abstracts with Programs, Geological Society of America, 2018, Vol. 50Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    The late Neoproterozoic strata in Finnmark (Arctic Norway) provide a good sedimentary record of Neoproterozoic glaciations on the Baltica paleocontinent. The lower Vestertana Group exposed on the Digermulen Peninsula contains two glaciogenic units, the Smalfjord and Mortensnes formations. Chemostratigraphic correlation dated the Smalfjord diamictite to the Marinoan glaciation (650-635 Ma), yet its age was also proposed to be older, per correlation to glacial units in central and southern Scandinavia. The diamictites are bracketing shales and siltstones of the interglacial Nyborg Formation. Stratigraphic, paleontological, and sedimentological data are presented from the interglacial-glacial succession, investigated by the Digermulen Early Life Research Group. Palynological analysis yielded well-preserved organic-walled microfossils (OWM) from the Nyborg Fm., and from fine-grained diamictite matrix in the Mortensnes Fm. via a modified extraction method.

    The interglacial Nyborg Fm. hosts a moderate diversity assemblage of prokaryotic and eukaryotic OWM, as well as acanthomorphic acritarchs such as Ceratosphaeridium, ?Cavaspina, and a novel process-bearing form. Organically preserved, enigmatic multicellular eukaryotic fossils occur in the upper Nyborg Fm. The Mortensens glacial assemblage is less diverse and contains bacterial filaments, leiosphaerids, toroidal forms, and Micrhystridium-type minute acanthomorphs.

    The presence of Doushantuo-Pertatataka type acritarchs in the Nyborg Fm., and small acanthomorphs in the Mortensnes diamictite corroborate an early Ediacaran age for the interglacial-glacial succession on Digermulen. In addition to the trace fossil and body-fossil record of Ediacara-biota in the overlying Stáhpogieddi Formation, the microfossil biostratigraphy suggests Marinoan and Gaskiers glaciation equivalent ages of the Varanger glaciations in Finnmark. Protistan diversity in the succession declined through and following the glaciation, until late Ediacaran.

  • 4.
    Agic, Heda
    et al.
    Department of Earth Science, University of California at Santa Barbara, Santa Barbara, USA.
    Moczydłowska, Małgorzata
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Högström, Anette
    Tromsø Universitetsmuseum.
    Ebbestad, Jan Ove R.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Jensen, Sören
    Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
    Meinhold, Guido
    Geowissenschaftliches Zentrum der Universität Göttingen, Germany.
    Palacios, Teodor
    Área de Paleontología, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz, Spain.
    Taylor, Wendy L.
    Department of Geological Sciences, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa.
    Novis, Linn K.
    Tromsø Universitetsmuseum.
    Unusual organic-walled microfossil from the late Neoproterozoic Nyborg Formation, Digermulen Peninsula, Arctic Norway2017Inngår i: ISECT 2017, 2017Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    The late Neoproterozoic Nyborg Formation is exposed in the Tanafjord area, Finnmark, Arctic Norway, on Digermulen and Varanger Peninsulas. The succession is composed of ~400 m of interbedded shales, siltstone and purple to grey sandstone, deposited between Neoproterozoic low latitude glacial deposits. The Nyborg Fm. lies on top of the Smalfjord diamictite, and is overlain by the Mortensnes diamictite (the latter was attributed to both Marinoan (650-635 Ma) and Gaskiers (579 Ma) glaciations) and the Ediacaran-Cambrian Stáhpogieddi Formation. Thus, the Nyborg Fm. represents late Neoproterozoic, probably the last Cryogenian interglacial interval. Presented material was collected in 2014 by members of Digermulen Early Life Research Group, from organic-rich, grey-green shales and siltstones of the Nyborg Mbr. D, uppermost Nyborg Fm. between Árasulluokta and Guvssájohka valleys. Organic-walled microfossils were extracted from shale via standard palynological acetolysis in hydrofluoric acid, and studied via light and scanning electron microscopy. Microfossils from the Nyborg Fm. include Synsphaeridium-type aggregated cells, unbranched bacterial filaments (Polythrichoides and Siphonophycus), sphaeromorph and envelope-bearing acritarchs (leiosphaerids, Stictosphaeridium, Simia), and previously unrecognized aggregated tubular microfossils. These taxa are long-ranging, but common in glacial-interglacial units worldwide, and thus broadly corroborate the Cryogenian age of the Nyborg sediments. The novel fossil, up to 300 μm in size, is a parenchymatous meshwork of interconnected organic-walled tubes that terminate in cup-shaped apices 4-11 µm in diameter. Irregular tube clusters are truncated both in macerates and in thin sections, suggesting post mortem transport. Elemental EDXS analysis indicates that extracted meshwork microfossils are predominantly composed of carbonaceous material and also associated with small amounts of titanium and vanadium. Considering the branching and adjoined body plan of carbonaceous fossil, it was likely multicellular and of eukaryotic affinity. As such, it may represent an important step in the evolution of complex multicellularity and morphological complexity several million years before the appearance of Ediacaran organisms.

  • 5.
    Agić, Heda
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi. Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA.
    Högström, Anette E. S.
    UiT Arctic Univ Norway, Arctic Univ Museum Norway, N-9037 Tromso, Norway.
    Moczydlowska, Malgorzata
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Jensen, Sören
    Univ Extremadura, Area Paleontol, E-06006 Badajoz, Spain.
    Palacios, Teodoro
    Univ Extremadura, Area Paleontol, E-06006 Badajoz, Spain.
    Meinhold, Guido
    Keele Univ, Sch Geog Geol & Environm, Keele ST5 5BG, Staffs, England;Univ Gottingen, Dept Sedimentol & Environm Geol, Goldschmidtstr 3, D-37077 Gottingen, Germany.
    Ebbestad, Jan Ove R.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Taylor, Wendy L.
    Univ Cape Town, Dept Geol Sci, ZA-7701 Rondebosch, South Africa.
    Höyberget, Magne
    Rennesveien 14, N-4513 Mandal, Norway.
    Organically-preserved multicellular eukaryote from the early Ediacaran Nyborg Formation, Arctic Norway2019Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, artikkel-id 14659Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Eukaryotic multicellularity originated in the Mesoproterozoic Era and evolved multiple times since, yet early multicellular fossils are scarce until the terminal Neoproterozoic and often restricted to cases of exceptional preservation. Here we describe unusual organically-preserved fossils from mudrocks, that provide support for the presence of organisms with differentiated cells (potentially an epithelial layer) in the late Neoproterozoic. Cyathinema digermulense gen. et sp. nov. from the Nyborg Formation, Vestertana Group, Digermulen Peninsula in Arctic Norway, is a new carbonaceous organ-taxon which consists of stacked tubes with cup-shaped ends. It represents parts of a larger organism (multicellular eukaryote or a colony), likely with greater preservation potential than its other elements. Arrangement of open-ended tubes invites comparison with cells of an epithelial layer present in a variety of eukaryotic clades. This tissue may have benefitted the organism in: avoiding overgrowth, limiting fouling, reproduction, or water filtration. C. digermulense shares characteristics with extant and fossil groups including red algae and their fossils, demosponge larvae and putative sponge fossils, colonial protists, and nematophytes. Regardless of its precise affinity, C. digermulense was a complex and likely benthic marine eukaryote exhibiting cellular differentiation, and a rare occurrence of early multicellularity outside of Konservat-Lagerstatten.

  • 6.
    Ahlgren, Joakim
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi, Analytisk kemi. Institutionen för biokemi och organisk kemi, Organisk kemi I. Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi.
    Reitzel, Kasper
    Danielsson, Rolf
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi, Analytisk kemi. Institutionen för biokemi och organisk kemi, Organisk kemi I. Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi.
    Gogoll, Adolf
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi, Analytisk kemi. Institutionen för biokemi och organisk kemi, Organisk kemi I. Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi.
    Rydin, Emil
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Kemiska sektionen, Institutionen för fysikalisk och analytisk kemi, Analytisk kemi. Institutionen för biokemi och organisk kemi, Organisk kemi I. Teknisk-naturvetenskapliga fakulteten, Biologiska sektionen, Institutionen för ekologi och evolution, Limnologi.
    Biogenic phosphorus in oligotropic mountain lake sediments: Differences in composition measured with NMR spectroscopy2006Inngår i: Water Research, nr 40, s. 3705-3712Artikkel i tidsskrift (Fagfellevurdert)
  • 7.
    Ahlgren Mattsson, David
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Jämförelse av portrycksmätning i Uppsalalera mellan portrycksmätare och dissipationstest2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Portrycket är en viktig parameter för att bestämma jordens egenskaper, såsom dränering, permeabilitet och stabilitet (då portrycket har en påverkan på den effektiva spänningen i jorden). Portrycket kan mätas med portrycksmätare men det kan även mätas under ett Cone penetrating test (CPT) med ett s.k. dissipationstest. Fördelar med ett dissipationstest jämfört med traditionell portrycksmätning skulle vara att det skulle spara tid och pengar, då man slipper trycka ner portrycksmätare och sedan vänta på att få portrycket ifrån dem, istället kan portrycket mätas under sondering med CPT.Detta självständiga arbete har som syfte att jämföra portrycksmätningar mellan portrycksmätning med BAT-spets och dissipationstest under CPT-sondering för att se hur bra mätvärden dissipationstester ger och om de eventuellt kan ersätta portrycksmätare. Fältförsöken av metoderna skedde i Uppsalalera, på en tomt i Kungsängen i Uppsala.Två stationer med BAT-spetsar på 5 meter, 7,5 meter och 10 meters djup sattes ner i leran. Sondering med CPT genomfördes sedan, där borren stoppades på samma djup som BAT-spetsarna. CPT:n stoppades på dessa djup i drygt 24 timmar, för att tillåta det generade portrycket som skapades när borren trycks ner i leran att skingras åt sidan. Jämviktsportrycket kommer vara det portryck som finns kvar efter att det generade portrycket har försvunnit. Portrycken från de två olika metoderna jämfördes sedan för att se hur nära dissipationstestet kommer värdena från portrycksmätningen med BAT-spetsarna.Resultatet av dissipationstesterna blev att inga av dem nådde referensvärdena från BAT-spetsarna efter 24 timmar. Beroende på användningsklass ligger dissipationstesterna inom den tillåtna minsta noggrannheten. Dissipationstest är antagligen inte så praktiskt tillämpbart i jordar med låg permeabilitet.

  • 8.
    Aldén, Liselotte
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Ottvall, Richard
    Da Silva Soares, José Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Klein, Jason
    Nätverket för vindbruk.
    Liljenfeldt, Johanna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Samexistens örnar och vindkraft på Gotland2017Rapport (Annet (populærvitenskap, debatt, mm))
  • 9.
    Aldén, Liselotte
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Ottvall, Richard
    Da Silva Soares, José Pedro
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Klein, Jason
    Nätverket för vindbruk.
    Liljenfeldt, Johanna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Nätverket för vindbruk.
    Samexistens örnar och vindkraft på Gotland2017Rapport (Annet (populærvitenskap, debatt, mm))
  • 10.
    Aleklett, Kjell
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Globala energisystem.
    Höök, Mikael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Globala energisystem. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Naturresurser och hållbar utveckling.
    Jakobsson, Kristofer
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Globala energisystem.
    Lardelli, Michael
    School of Molecular and Biomedical Science, University of Adelaide, Australia.
    Snowden, Simon
    Management School, University of Liverpool, United Kingdom.
    Söderbergh, Bengt
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Fysiska sektionen, Institutionen för fysik och astronomi, Globala energisystem.
    The Peak of the Oil Age: Analyzing the world oil production Reference Scenario in World Energy Outlook 20082010Inngår i: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777, Vol. 38, nr 3, s. 1398-1414Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The assessment of future global oil production presented in the IEA’s World Energy Outlook 2008 (WEO 2008) is divided in to 6 fractions; four relate to crude oil, one to non-conventional oil, and the final fraction is natural-gas-liquids (NGL). Using the production parameter, depletion-rate-of-recoverable- resources, we have analyzed the four crude oil fractions and found that the 75 Mb/d of crude oil production forecast for year 2030 appears significantly overstated, and is more likely to be in the region of 55 Mb/d. Moreover, an alysis of the other fractions strongly suggests lower than expected production levels. In total, our analysis points to a world oil supply in 2030 of 75Mb/d, some 26 Mb/d lower than the IEA predicts. The connection between economic growth and energy use is fundamental in the IEA’s present modeling approach. Since our forecast sees little chance of a significant increase in global oil production, our findings suggest that the ‘‘policy makers, investors and end users’’ to whom WEO 2008 is addressed should rethink their future plans for economic growth. The fact that global oil production has very probably passed its maximum implies that we have reached the Peak of the Oil Age.

  • 11.
    Alexander, Mannelqvist
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Paleontology and Sedimentology of the Alum Shale Formation at Björnberget, Västerbotten County, Sweden2016Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    A new locality of the Alum Shale Formation at Björnberget, Västerbotten County, of the lower allochthon of the Caledonian front is described herein. Two new species of acrotretid brachiopods were found. Tingitanella vilhelminia n. sp. adds another species to the monospecific genus. T. vilhelminia also extend the genus distribution to Sweden. Anabolotreta furcatus n. sp. is the first member of the genus found in Sweden and extend the stratigraphic range to Stage 5 of Cambrian Series 3. It also exhibits an unusual bifurcating shell structure described for the first time herein. One trilobite was found at the locality, Acadoparadoxides torelli, indicating that the exposures at Björnberget belong to the upper Acadoparadoxides (Baltoparadoxides) oelandicus superzone. The fauna found is impoverished in comparison to the fauna that has been described from Jämtland and reflects the depositional environment on the deep outer shelf with low sediment input.

    The known exposure at Granberget, close to Björnberget, is described with respect to the paleontology and sedimentology of the section. The fauna at Granberget could be extended with two new species of agnostids, Hypagnostus lingula and Hypagnostus mammillatus, to a total of six taxa of trilobites. The depositional environment was periodically affected by storms, depositing limestone layers composed of skeletal material. The Alum shale does not exhibit these sedimentary structures and have probably lost the majority of the them during diagenesis.

  • 12.
    Anderson, Lakin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Measuring Sustainable Cities: An approach for assessing municipal-level sustainability indicator systems in Sweden2013Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    It is now common for managers, strategists, planners and citizens at municipality level to use sustainable development indicators (SDI) to help them work towards sustainable development. SDI constitute an information system for monitoring, reporting and decision-making which in theory should help us decide how to intervene in natural, economic, social and political systems for a better, more sustainable future. But not all indicator systems are created equal. Some are better tools than others when it comes to helping cities and municipalities in their work, and thousands of municipalities use SDI worldwide. How then should we assess the effectiveness of existing indicators for municipalities?

    To answer this question I develop an approach for assessing the edesign, creation and communication of existing, in-use SDI, and then apply it in a case study in Falun Municipality in Dalarna County, Sweden. The approach assesses five aspects of SDI: ‘Vision’, ‘Framework’, ‘Indicator Selection’, ‘Stakeholder Participation’ and ‘Communication’. The findings in Falun suggest that SDI have been essential to the implementation of sustainable development in policy and action in general municipal operations, but the municipality has not moved beyond a ‘conventional’ sustainable development vision and monitoring strategy. The benefits and constraints of the current indicator system are then discussed using the above approach, and the thesis finishes by offering suggestions for the municipality going forward. I also point to the need to develop a standardised assessment method for thousands of municipalities using indicator systems used today, to help in ongoing review and improvement of SDI in practice.

  • 13.
    Andersson, Hanna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Bradoriids from the middle Cambrian 'thin' Stephen Formation at Odaray Mountain, Canadian Rocky Mountains2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Two new species of Cambrian bradoriid arthropods have been found in the ‘thin’ Stephen Formation, Odaray Mountain, Canada; the hipponicharionid Flumenoglacies michaeli n. sp. and the comptalutid Phasoia stephenensis n. sp. This paper includes the description and illustrations of these species as well as two undetermined species from the same locality. Phasoia stephenensis n. sp. is the first Phasoia reported from Laurentia and Flumenoglacies michaeli n. sp. belongs to the new genus Flumenoglacies recently described by Peel & Streng (in press) from Greenland.

    In the discussion previous reports of the genus Phasoia are ordered chronologically and a migration path from Gondwana to Laurentia is suggested. However, more information on the stratigraphic and regional distribution of this taxon is needed to support this theory since Phasoia is so far only known from Australia, South China and now North America.

    The ornamentation of Phasoia stephenensis n. sp. and Flumenoglacies michaeli n. sp. is discussed and compared with the ornamentation of the hipponicharion Pseudobeyrichona longquanxiensis (Cui 1987), the svealutid Tsunyiella Zhang (1974) and the cambriid Petrianna fulmenata Siveter (1995). It is suggested that it might be remnants of a respiratory system. 

  • 14. Andersson, Jan-Olov
    et al.
    Hasselid, Sara
    Widen, Per
    Bax, Gerhard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Miljö- och landskapsdynamik. ELD.
    Is the Snow Leopard (Unica unica) endangered?: A study of popular viability and distribution using vulnerability and GIS analysis methods2004Inngår i: Proceedings of the 7th International Symposium on High Mountain Remote Sensing Cartography, 2004, s. 224-Konferansepaper (Fagfellevurdert)
  • 15.
    Andersson, Linnea
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Kartläggning av möjligheten att återanvända takdagvatten för att minska dricksvattenförbrukningen2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Dricksvatten är vårt viktigaste livsmedel. I takt med klimatförändringarna kommer temperaturen öka och vädret bli mer extremt vilket gör vår tillgång till dricksvatten mer sårbar. Redan idag finns problem med dricksvattenförsörjningen i vissa delar av Sverige. Ett sätt att minska dricksvattenförbrukningen är att samla in regnvatten och använda det till processer med lägre kvalitetskrav än dricksvatten. Swedavia jobbar aktivt med att få mer miljövänliga flygplatser och som en del av detta minska dricksvattenförbrukningen. Detta projekt utreder möjligheten att samla upp regnvatten på takytor för att använda till processer som idag använder dricksvatten. Projektet är koncernövergripande och applicerbart på samtliga av Swedavias flygplatser även om arbetet utförs på Stockholm Arlanda Airport.

    I detta examensarbete har kvaliteten på vattnet från fem olika typer av tak studerats. Taken valdes bland annat utifrån tidigare utförda studier där föroreningsgraden på vattnet från olika sorters tak undersökts. Även faktorer som förekomst på flygplatserna spelade in. Provtagning utfördes vid två tillfällen där avrunnet regnvatten samlades in från de fem olika taken samt ett referensprov på rent regnvatten. Fem näringsämnen, löst organiskt material, suspenderat material och sex olika tungmetaller analyserades.

    Tre av taken gav så pass höga värden att de överskred satta gränsvärden. Det gröna taket gav höga halter fosfor och löst organiskt material. Taket med TRP-stål gav höga zinkhalter vilket tros bero på den zinkbeläggning som taket har. Taket med PVC-plastduk gav också höga zinkhalter vid en av provtagningarna, men inte lika höga som på TRP-ståltaket. Taken med FPO-plast, som är en mer miljövänlig plastduk, och taket med takpapp gav låga värden och överskred inte några satta gränsvärden. Referensprovet på regnvatten gav hög halt suspenderat material vid en av provtagningarna samt höga blyhalter som överskred gränsvärdena.

    Slutsatserna av detta projekt är att gröna tak, tak med TRP-stål och tak med PVC-plastduk riskerar att överskrida gränsvärden vilket gör att de lämpar sig sämre för uppsamling av regnvatten än de resterande taken. Resultatet baseras på de två provtagningar som utfördes vilket gör att fler provtagningar bör utföras för att kunna dra den definitiva slutsatsen att dessa tre typer av tak inte lämpar sig för detta ändamål. Taken med FPO-plast och takpapp överskrider inga gränsvärden och kan, utifrån de analyserade parametrarna, lämpa sig för uppsamling av regnvatten. Det är dock viktigt att poängtera att för att kunna återanvända vattnet och garantera att det håller en tillräckligt bra kvalitet behöver fler parametrar analyseras, något som inte kunde genomföras i detta projekt.

  • 16.
    Anna, Sporre
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik.
    Utvärdering av grumlighet i miljökontrollprogram för ytvatten vid konstruktionsarbeten2015Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Vid miljöövervakning av konstruktionsprojekt såsom byggnation av väg och järnväg är det vanligt att uppsatta riktvärden för grumlighet överskrids. I en genomgång av årsrapporter från infrastrukturprojektet BanaVäg i Väst visade det sig att riktvärden för grumlighet ofta sätts upp utan noggrann kartläggning av vattendragens naturliga grumlighetsnivåer. Detta arbetssätt beror förmodligen på den oklara lagstiftningen gällande riktvärden på grumlighet och på bristfälliga anvisningar för hur referensprovtagning av grumlighet bör utformas. För att komma åt problematiken med opålitliga riktvärden borde riktvärden därför anpassas till enskilda vattendrag. I detta examensarbete gjordes ett försök att ta fram en metod för att kunna sätta vattendragsanpassade riktvärden. En dynamisk modell utvecklades för att ta fram grumlighet utifrån jordbruksareal, andel lera i avrinningsområdet samt vattenflöde. Modellen gav bäst, men trots allt inte tillfredställande, resultat för vattendrag med avrinningsområden mindre än 100 km2. För vattendrag som hade ett större avrinningsområde blev modellresultaten sämre, förmodligen på grund av en komplex samverkan mellan olika drivvariabler, där vissa inte ens togs hänsyn till i modellen. För att komma vidare med vattendragsanpassade riktvärden i Sverige föreslås fortsättningsvis en omfattande nationell satsning framförallt för större värdefulla vattendrag. Denna satsning bör innefatta anpassning av mer avancerade modeller för grumlighet till svenska förhållanden. Sammanfattningsvis visar studien tydligt att det finns ett stort behov av att förbättra metoderna för att kontrollera grumlighet samt att ta fram riktvärden anpassade utifrån naturliga grumlighetsnivåer i de olika vattendragen.

  • 17.
    Antans, Andis
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Multi-Criteria Decision Analysis in Wind power Project Development: Case study in Latvia2017Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    Wind Power Project Development is a complicated, capital and resource-inclusive process, where a wide variety of factors have to be considered and several stakeholders have a significant say in the process. Decision making in such an environment is complex and has to be approached comprehensively. In order to sustain a structured and clear decision-making process, the sustainable energy industry has recognized Multi-Criteria Decision Analysis (MCDA) method as a suitable set of tools to aid in the decision-making process. One of the MCDA tools – PROMETHEE II, has been examined in this master thesis, to evaluate its eligibility as a decision making aid in wind power project development.

    To structurally and realistically evaluate the tool, it has been applied to a case study in Ventspils region, in Latvia. The author of this thesis has a preliminary agreement with the owners of the sites to develop the project, therefore, this thesis has a strong potential for a practical implementation in future. Four scenarios have been developed for an evaluation, contributing to four variations of the different amount of turbines erected, with two different hub heights, on two differently sized sites. The scenarios are assessed based on the interests of six key stakeholders. Their opinion on twelve criteria is examined.

    Input data for each criterion has been generated via WindPro and MS Excel software or by authors assessment based on the researched literature. PROMETHEE II is used to extrapolate a comprehensive and clear representation of the results.

    The evaluation of the MCDA method proved that MCDA tools, and PROMETHEE II, in particular, can provide excellent support in decision making in wind power development. A wide variety of input data, as well as the various and often contradicting interests by different stakeholders, can be taken into account, while, at the same time, a clear result that can assist in decision making, is generated. 

    Wind Power Project Development is a complicated, capital and resource-inclusiveprocess, where a wide variety of factors have to be considered and severalstakeholders have a significant say in the process. Decision making in such anenvironment is complex and has to be approached comprehensively. In order to sustaina structured and clear decision making process, sustainable energy industry hasrecognized Multi-Criteria Decision Analysis (MCDA) method as a suitable set of tools toaid in the decision making process. One of the MCDA tools – PROMETHEE II, hasbeen examined in this master thesis, to evaluate its eligibility as a decision making aidin wind power project development.To structurally and realistically evaluate the tool, it has been applied on a case study inVentspils region, in Latvia. The author of this thesis has a preliminary agreement withthe owners of the sites to develop the project, therefore, this thesis has a strongpotential for a practical implementation in future. Four scenarios have been developedfor an evaluation, contributing to four variations of different amount of turbines erected, with two different hub heights, on two differently sized sites. The scenarios are assessed based on the interests of six key stakeholders. Their opinion on twelve criteria examined. Input data for each criterion has been generated via WindPro and MS Excel software orby authors assessment based on the researched literature. PROMETHEE II is used to extrapolate a comprehensive and clear representation of the results.The evaluation of the MCDA method proved that MCDA tools, and PROMETHEE II in particular, can provide excellent support in decision making in wind power development. Wide variety of input data, as well as the various and often contradicting interests by different stakeholders can be taken into account, while, at the same time, a clear result that can assist in decision making, is generated.

  • 18.
    Arvestål, Emma
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Changes in Arsenic Levels in the Precambrian Oceans in Relation to the Upcome of Free Oxygen2013Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Life on Earth could have existed already 3.8 Ga ago, and yet, more complex, multicellular life did not evolve until over three billion years later, about 700 Ma ago. Many have searched for the reason behind this apparent delay in evolution, and the dominating theories put the blame on the hostile Precambrian environment with low oxygen levels and sulphide-rich oceans. There are, however, doubts whether this would be the full explanation, and this thesis therefore focuses on a new hypothesis; the levels of the redox sensitive element arsenic increased in the oceans as a consequence of the change in weathering patterns that followed the upcome of free oxygen in the atmosphere at about 2.4 billion years ago. Given its toxicity, this could have had negative effects upon the life of the time. To test the hypothesis, 66 samples from drill cores coming from South Africa and Gabon with ages between 2.7 and 2.05 Ga were analysed for their elemental composition, and their arsenic content were compared with carbon isotope data from the same samples. These confirmed that a rise in arsenic concentration following the upcome of free oxygen in the atmosphere and the onset of oxidative weathering of continental sulphides. Arsenic, which is commonly found in sulphide minerals, was weathered together with the sulphide and delivered into the oceans, where it in the Palaeoproterozoic increased to over 600% compared to the older Archaean levels, at least locally. Iron had the strongest control over the arsenic levels in the anoxic (ferruginous and sulphidic) oceans, probably due to its ability to remove arsenic through adsorption. During oxygenated conditions, sulphur instead had the strongest influence upon arsenic, likely because of the lack of dissolved iron. The highest arsenic levels were found in samples recognised as coming from oxygenated conditions, although this might be due to the oxygenation state of arsenic affecting its solubility. Arsenic is toxic already at low doses, especially if the necessary arsenic detoxification systems had not yet evolved. However, the lack of correlation between arsenic and changes in δ13C indicated that the increase of arsenic did not affect the primary production between 2.7 and 2.05 Ga. Thus, whether arsenic could have affected the evolution of life during the Mesoproterozoic remains to be shown.

  • 19.
    Arvestål, Emma
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Streng, Michael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    A new species of Cyrtograptus (Graptoloidea) from the Llandovery of Västergötland (Sweden)2011Inngår i: The 2nd Wiman Meeting: Carl Wiman's Legacy: 100 years of Swedish Palaeontology, Uppsala, 2011, s. 2-2Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A new species of the genus Cyrtograptus from the late Llandovery of southern Sweden (Västergötland) is presented. The new species has been found near the top of Kinnekulle (Högkullen) in the Retiolites Shales, which are part of the lapworthi zone (late Telychian). Although it resembles the coeval C. lapworthi in appearance, a detailed comparison of the type material of C. lapworthi revealed distinct differences: the new species is more openly coiled in the proximal part, has a larger Two Thecae Repeat Distance (2TRD), and, most significantly, bears a second order cladium. Second order cladia are unknown from C. lapworthi. The new species is also compared with other species of Cyrtograptus that are characterized by second order cladia, such as the cotemporaneous C. laqueus and the slightly younger C. insectus (insectus zone; latest Telychian). However, C. laqueus differs from the new species in having a lower number of thecae separating the cladia, and also by the appearance of its proximal part, which forms a loop by crossing its own main stipe. C. insectus differs by having wider spaced cladia and a stronger coiled proximal part. Furthermore, the need of a redefinition of C. lapworthi is highlighted, due to the large morphological variations within this species.

  • 20.
    Arvestål, Emma
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Streng, Michael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden2012Konferansepaper (Annet vitenskapelig)
  • 21.
    Arvestål, Emma
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Streng, Michael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Cyrtograptids from the Telychian (upper Llandovery) of Kinnekulle Mountain, southern Sweden2013Inngår i: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 135, nr 1, s. 45-56Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The late Llandovery graptolite fauna of the Retiolites Shales on Kinnekulle Mountain in the province of Västergötland has long been known but never illustrated or studied in detail. New collections of graptolites from an interval at the very top of the exposed succession confirm previous reports of cyrtograptids, which make the shales on Kinnekulle the youngest preserved Palaeozoic rocks in the area. The co-occurrence of Oktavites spiralis and Cyrtograptus lapworthi constrains the strata to the lower lapworthi Biozone of the upper Telychian. The associated graptolite fauna comprises numerous monograptids and Retiolites angustidens as well as Cyrtograptus kinnekullensis n. sp., characterised by its open coiling and the presence of a second-order cladium on the second thecal cladium. This early occurrence of a cyrtograptid species with a second-order cladium on Baltica matches evolutionary patterns observed in Laurentia, suggesting that the ability to grow cladia of both first and higher order evolved approximately, synchronously and at the very beginning of cyrtograptid evolution.

  • 22.
    Bajdek, Piotr
    et al.
    Aleja Najswieztszej Maryi Panny 20-20A, PL-42200 Czestochowa, Poland..
    Qvarnström, Martin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Owocki, Krzysztof
    Polish Acad Sci, Inst Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland..
    Sulej, Tomasz
    Polish Acad Sci, Inst Paleobiol, Twarda 51-55, PL-00818 Warsaw, Poland..
    Sennikov, Andrey G.
    Russian Acad Sci, Borissiak Paleontol Inst, Profsoyuznaya 123, Moscow 117997, Russia.;Kazan Fed Univ, Kremlyovskaya 18, Kazan 420008, Russia..
    Golubev, Valeriy K.
    Russian Acad Sci, Borissiak Paleontol Inst, Profsoyuznaya 123, Moscow 117997, Russia.;Kazan Fed Univ, Kremlyovskaya 18, Kazan 420008, Russia..
    Niedzwiedzki, Grzegorz
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Microbiota and food residues including possible evidence of pre-mammalian hair in Upper Permian coprolites from Russia2016Inngår i: Lethaia: an international journal of palaeontology and stratigraphy, ISSN 0024-1164, E-ISSN 1502-3931, Vol. 49, nr 4, s. 455-477Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Coprolites (fossil faeces) provide direct evidence on the diet of its producer and unique insights on ancient food webs and ecosystems. We describe the contents of seven coprolites, collected from the Late Permian Vyazniki site of the European part of Russia. Two coprolite morphotypes (A, B) contain remains of putative bacteria, cyanobacteria, fungi, protists, invertebrate eggs, arthropod elements, undigested bone and tooth fragments, fish scales and elongated hair-like structures with hollow interiors. Content, size and shape of the coprolites together with the associated body fossil record suggest that the most probable scat-producers were carnivorous tetrapods; the bone-rich morphotype A reveals short food retention time and a fast metabolism and is therefore assigned to therapsid carnivores whereas morphotype B with rarer and degraded bones are assigned to archosauromorphs or other non-therapsid carnivores. The general coprolite matrix contains abundant micron-sized spheres and thin-walled vesicles which are interpreted as oxide and phosphatic pseudomorphs after microbial cells. From analyses of the undigested bones, we infer that they represent remains of actinopterygian fish, a therapsid and unrecognizable parts of amphibians and/or reptiles. Additionally, hair-like structures found in one coprolite specimen occur as diagenetically altered (oxide-replaced) structures and moulds (or partly as pseudomorphs) in a microcrystalline carbonate-fluoride-bearing calcium phosphate. This suggests that the latest Permian therapsids probably were equipped with hair-like integument or hairsuit. If true, this is by far the oldest evidence of this mammalian character in the stem group of mammals.

  • 23.
    Balthasar, Uwe
    et al.
    University of Glasgow.
    Brazeau, Martin
    Brock, Glenn
    Macquarie University, Australia.
    Harper, David
    Durham University.
    Holmer, Lars
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    McGowan, Alistair
    Skovsted, Christian B.
    Naturhistoriska Riksmuseet.
    Streng, Michael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Zhang, Zhifei
    Northwest University, Xi'an.
    Early evolution of biomineralization in brachiopods2012Konferansepaper (Annet vitenskapelig)
  • 24.
    Balthasar, Uwe
    et al.
    University of Glasgow.
    Brazeau, Martin
    Brock, Glenn
    Macquarie University, Australia.
    McGowan, Alistair
    Harper, David
    Holmer, Lars
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Skovsted, Christian B.
    Naturhistoriska Riksmuseet.
    Streng, Michael
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Zhang, Zhifei
    Brachiopod phylogeny revisited: Using stem groups to flesh out molecular tree topology2011Konferansepaper (Annet vitenskapelig)
  • 25.
    Bate, Stephen
    et al.
    Royal Holloway Univ London, Quaternary Res Ctr, Dept Geog, Egham TW20 0EX, Surrey, England..
    Stevens, Thomas
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära. Royal Holloway Univ London, Quaternary Res Ctr, Dept Geog, Egham TW20 0EX, Surrey, England.; Univ Novi Sad, Fac Sci, Lab Paleoenvironmental Reconstruct, Trg D Obradov 2, Novi Sad 21000, Serbia..
    Buylaert, Jan-Pieter
    Univ Aarhus, Dept Earth Sci, Nord Lab Luminescence Dating, Riso DTU, DK-4000 Roskilde, Denmark.; Ctr Nucl Technol, Riso DTU, DK-4000 Roskilde, Denmark..
    Markovic, Slobodan
    Univ Novi Sad, Fac Sci, Lab Paleoenvironmental Reconstruct, Trg D Obradov 2, Novi Sad 21000, Serbia..
    Roos, Per
    Ctr Nucl Technol, Riso DTU, DK-4000 Roskilde, Denmark..
    Tasic, Nenad
    Univ Belgrade, Fac Philosophy, Dept Archaeol, Belgrade, Serbia..
    Pottery versus sediment: Optically stimulated luminescence dating of the Neolithic Vinca culture, Serbia2017Inngår i: Quaternary International, ISSN 1040-6182, E-ISSN 1873-4553, Vol. 429, s. 45-53Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Optically stimulated luminescence (OSL) dating was applied to the Neolithic Vinca culture's type-site, Vinca Belo-Brdo, to establish best protocols for routine luminescence dating of similar Holocene sites, critical in understanding Neolithic to Chalcolithic cultural development. Equivalent dose (De) values were investigated for sediment samples using 63-90 mm grains on large and small aliquots, and single-grain laser luminescence (SGLL), and for pottery samples using large aliquots of 4-11 mm grains. The effects of changing water content and the different techniques available to establish radionuclide concentration were explored for their impacts on dose rate (Dr) estimates. Ages for two pottery samples of 6.74 +/- 0.37 ka and 7.04 +/- 0.47 ka are in line with the existing AMS radiocarbon chronology for the site and are regarded as the best dates available. Sediment samples at Vinca show poor signal strength, and the uncertainty over past water content, in addition to the possibility of mixing and/or partial bleaching of the quartz, means that we do not recommend the use of sediment-derived ages at complex archaeological sites such as Vinca. OSL dating of fired pottery however, presents a powerful tool for generating independent chronologies at archaeological sites as well as providing additional constraints for Bayesian age models.

  • 26.
    Bax, Gerhard
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Miljö- och landskapsdynamik. ELD.
    Remote sensing and 3D visualization of geological structures in mountain ranges:: examples from the Northern Scandinavian Caledonides and the south Tibetan Himalayas2004Inngår i: The 26th Nordic Geological Winter Meeting: Abstract volume, 2004, s. 105-Konferansepaper (Fagfellevurdert)
  • 27.
    Bax, Gerhard
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Miljö- och landskapsdynamik. ELD.
    Buchroithner, ManfredDepartment of Cartography.
    Proceedings of the 5th International Symposium of the use of Remote Sensing in Maountain Cartography: High-Mountain Remote Sensing Cartography 19982002Konferanseproceedings (Fagfellevurdert)
  • 28.
    Bazzi, Mohamad
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Extinction Dynamics in Selachimorpha: Tracking Dental Morphology Across the K–Pg Boundary2016Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The study of the effects of the Cretaceous–Palaeogene mass extinction (K–Pg) on Selachimorpha (shark) evolution is limited to assessments of taxonomic richness. Prior work on the fossil record of neoselachians both on a global- and regional scale has shown that sharks achieved great taxonomic diversity in the Late Cretaceous but were subsequently punctuated by the K–Pg extinction. The ecological significance of this bioevent on global shark communities is particularly poorly understood with contrasting views on patterns of extinction selectivity. Similar to actinopterygian fishes, the extinction of sharks was focused on large-bodied pelagic piscivorous. However, patterns of trophic selectivity in sharks were recently contested and posited as random with respect to environment and ecology. Following the extinction at the K–Pg boundary, the ecological role of sharks in the earliest Palaeocene is said to have diminished and contrary to actinopterygian fishes did not experience an adaptive radiation.Current analyses are based on assessments of taxonomic diversity and absolute faunal abundance, and lack the necessary morphological framework with which to adequately test ecological dynamics in sharks across the K–Pg. To test both previous and newly formulated macroevolutionary hypotheses, shark tooth morphology was quantified via landmark- and semilandmark-based geometric morphometrics and used to reconstruct patterns of disparity and morphospace occupation across the K–Pg boundary. The newly assembled morphometric dataset comprises 1457 shark teeth spanning the Maastrichtian–Palaeocene compiled from published images.The results reveal (1) near-stasis in dental-shape disparity in Selachimorpha (globally) across the K–Pg boundary, and (2) a decrease in morphospace occupation associated with cutting-type dentitions. Considered jointly, observed disparity and morphospace patterns in Selachimorpha do not conform to the predictions of a non-random extinction model. However, dissecting patterns of disparity and morphospace occupation along phylogenetic lines reveal differential responses to the extinction, affirming phylogenetic selectivity with trophic implications.Testing for ecological release in sharks, using disparity dynamics in lamniforms and carcharhiniforms as a model, is shown to be complex. Pattern across the extinction event reveal an increase in tooth morphologies of carcharhiniforms in previously underexplored area of morphospace that were previously occupied by lamniforms, an area corresponding to macropredaceous forms (e.g. anacoracids and pseudocoracids). However, the observed increases in cutting-type dentitions in carcharhiniforms are largely driven by the proliferation of triakids, that are not ecologically equivalent to macropredatory lamniforms. I suggest that the combined effect of a selective decline in lamniform ecodiversity and the diversification of mid-trophic small-sized pelagic bony fish triggered the post-Cretaceous diversification of triakids. The K–Pg boundary was therefore crucial in setting the stage for the carcharhiniform-dominated selachimorph community that can be seen today.

  • 29.
    Bazzi, Mohamad
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Einarsson, Elisabeth
    Lund University.
    Kear, Benjamin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper. Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Late Cretaceous (Campanian) actinopterygian fishes from the Kristianstad Basin of southern Sweden2016Inngår i: Mesozoic Biotas Of Scandinavia And Its Arctic Territories, Geological Society, 2016, s. 277-292Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    Although a diverse range of aquatic vertebrates are documented from the Upper Cretaceous (mid-Campanian) marine strata of the Kristianstad Basin in southern Sweden, only chondrichthyans and marine amniotes have been described in detail to date. In contrast, coeval actinopterygians are virtually unreported, yet their remains are extremely abundant at most sampled localities. A comprehensive assessment of these fossils has identified the first Late Cretaceous actinopterygian fauna from the Fennoscandian Shield, incorporating indeterminate lepisosteids, the durophagous pycnodontid Anomoeodus subclavatus, the predatory pachycormid Protosphyraena sp., a large ichthyodectid, pachyrhizodontids resembling Pachyrhizodus, the enchodontid Enchodus cf. gladiolus and indeterminate small teleosts. These taxa are diagnosed mainly from isolated teeth and scales, implying substantial taphonomic loss prior to burial. Moreover, the prolific recovery of actinopterygian skeletal remnants in recent excavations suggests that historical collecting biases, rather than ecological paucity, have contributed to their under-representation in the Swedish Cretaceous record. Palaeobiogeographically, the Kristianstad Basin actinopterygians show compositional resemblance to assemblages from the Northern European Platform and the Western Interior Seaway of North America, advocating distributional communication across the Boreal proto-Atlantic Ocean.

  • 30.
    Berg-Madsen, Vivianne
    et al.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Ebbestad, Jan Ove R.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Lars Roberg och trilobiterna2015Inngår i: Geologiskt forum, Vol. 22, nr 4, s. 22-23Artikkel i tidsskrift (Annet (populærvitenskap, debatt, mm))
    Abstract [sv]

    Den 18 juni 1715 försvarades uppsatsen De Fluviatili Astaco ejusque usu medico vid Uppsalauniversitet. Författaren var Lars Roberg ochämnet var kräftdjur av olika slag. Arbetet innehöllen figur och på denna avbildades tre fossil;en krabba och två svanssköldar från trilobiter. Fossil hade aldrig tidigare avbildats i trycktaarbeten i Sverige, och därmed blev Lars Robergför trehundra år sedan den första i Sverige attillustrera fossil, därtill även svenska sådana.

  • 31.
    Bijl, Xanthe Sifra
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    An Analysis of Growth and Aging in a Tyrannosaurus rex through Histology and Synchrotron Micro-Tomography2019Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Size comparisons, skeletochronological, and palaeohistological studies have been major contributors in the past decades to expand our knowledge on how dinosaurs, including Tyrannosaurus rex, lived and grew. Historically, size comparisons have been used to establish a relative order of age, and thin sections have been used to study the palaeohistology and skeletochronology, as well as establish growth curves, to construct more quantifiable age determinants. Whenever a new specimen is found or described, it should be placed in context by comparing it to the other known specimens. This study aims to do that for the Naturalis T. rex specimen, RGM 792.000. Comparing the femoral length and circumference data places RGM 792.000 3rd to 6th in size, depending on the literature cited, and so it can be concluded that this T. rex is a, younger, adult. The palaeohistological side of this study aims to reconstruct a more exact age at the time of death as well as a growth curve, using not only thin sections, but also synchrotron radiation computed microtomography. By counting the lines of arrested growth through both methods it can be established that RGM 792.000 was at least 17 years old at the time of death. Additionally, this study demonstrates that the use of synchrotron scans is beneficial to use as a complementary method when studying the skeletochronology and palaeohistology in dinosaurs. 

    Fulltekst tilgjengelig fra 2024-02-01 12:00
  • 32.
    Biro, Josephine
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Kommuners bedömningar i masshanteringsfrågor2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    I bygg- och anläggningsarbeten uppkommer jord- och bergmassor vilka utgör fasta eller lösa markmaterial som måste grävas upp, förflyttas eller kan användas i byggnadsprocessen. Detta kallas med ett samlingsnamn för masshantering och hur den sker beror på hur massorna klassas, vad de innehåller och hur de är tänkta att användas i framtiden.                       Det är landets kommuner som är tillsynsmyndighet för masshantering och till hjälp i beslutsfattandet finns ett juridiskt reglerverk som definierar när massor utgör ett avfall, kan återanvänds eller kan återvinnas. Det finns även vägledning från Naturvårdsverket i form av rapporter och handböcker. Denna undersöknings syfte är att genom kvalitativa intervjuer och kvalitativ analys ta reda på hur tre utvalda kommuner (Linköping, Sigtuna och Söderhamn) använder sig av och tolkar det juridiska regelverket och Naturvårdsverkets vägledning för bedömningar i masshanteringsärenden. Undersökningens resultat visar att alla de undersökta kommunerna använder det juridiska regelverket och Naturvårdsverkets rapport 5976 ”Riktvärden för förorenad mark” (där riktvärden för känslig markanvändning och mindre känslig markanvändning definieras) på likartade sätt. Däremot skiljer sig tolkningen och tillämpningen av Naturvårdsverkets handbok 2010:1 ”Återvinning av avfall i anläggningsarbeten” (där riktvärden för mindre än ringa risk, ringa risk, mer än ringa risk samt nivåer för deponitäckning definieras) mellan kommunerna. Orsakerna till detta varierar från kommun till kommun.

  • 33.
    Bjälkefur Seroka, Sofia
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Föroreningsspridning runt en deponi i Uppsala: Dataanalys och modellering2019Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Deponering är globalt sett det vanligaste sättet att hantera avfall, men i Sverige får sedan 2001 enbart avfall som inte kan återanvändas deponeras. Innan deponiförordningen trädde i kraft 2001 deponerades många olika typer av avfall. En deponi används idag som ett slutförvar för avfall och för att minimera infiltration av regnvatten och eventuell föroreningsspridning sluttäcks gamla deponier. Sluttäckningen består av flera skikt som tillsammans ska täta deponin och leda bort vatten. Att förvara avfall i en sluttäckt deponi är miljöfarlig verksamhet och det är därför av intresse att kontrollera omgivningarna under och efter sluttäckning för att säkerställa att eventuell föroreningsspridning minskar.

    På Hovgårdens avfallsanläggning i Uppsala kommun har en deponi som använts sedan 1971 sluttäckts under hösten 2018. I två provtagningsrör vid deponin, i vilka provtagning och analys skett regelbundet sedan 1991, har förhöjda halter av vissa ämnen kunnat uppmätas efter att arbetet med sluttäckningen påbörjades. Syftet med detta examensarbete var att få ökad förståelse för trender i ämneshalter samt att utreda hur sluttäckning påverkar grundvattennivåer och ämneskoncentrationer runt deponin. Uppmätta halter i provtagningsrören sammanställdes och trender analyserades med statistiska verktyg i mjukvaran R. Dessutom konstruerades en grundvattenmodell över avfallsanläggningen i MODFLOW och MT3DMS. Stationära flödessimuleringar och transportsimuleringar med klorid utfördes.

    Tolv av 33 analyserade ämnen och parametrar uppvisar statistiskt signifikanta ökningar i antingen ett av provtagningsrören, båda eller båda analyserade tillsammans. Dessa är alkalinitet, elektrisk konduktivitet, sulfat, klorid, kalcium, natrium, svavel, kalium, magnesium, strontium, barium, och nitratkväve. Sex av dem minskar statistiskt signifikant och dessa är pH-värdet, kadmium, zink, kvicksilver, bly och arsenik. Grundvattenmodellen visar att grundvattnet under etapp 1 flödar mot resten av anläggningen men att flöden ut från deponin finns i de sydvästra och sydöstra hörnen. Sluttäckningen leder till lägre nivåer och en förändrad grundvattendelare vilket kommer minska läckaget, främst i den sydvästra delen. Modellsimuleringar med olika grundvattenbildningsmängder och kloridkoncentrationer visade att ökningar av kloridhalter inte kan förklaras med minskad grundvattenbildning i kombination med förhöjda koncentrationer. Förklaringen bör därmed vara andra fysikaliska och eventuellt kemiska processer som skett samtidigt som sluttäckningen. De parametrar som påverkade simulerade ämneshalter mest var konduktansen i diken och dränering samt moränens hydrauliska konduktivitet.

  • 34.
    Björgúlfsson, Páll
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Numerical Model of a Fossil Hydrothermal System in the Southern East Pacific Rise Exposed at Pito Deep2012Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The Mid Ocean Ridge system with its volcanism and related hydrothermal activity has been a subject for many studies since the discovery of high temperature hydrothermal vents at the ridge surfaces in the 1970´s. This thesis focuses on deep sea hydrothermal activity on a superfast spreading ridge, the SouthernEast Pacific Rise (SEPR).The ridge is located in the South Pacific, off the coast of South America, and separates the Nazca Plate and the Pacific Plate. A fossil high temperature hydrothermal zone hosted by a fault was sampled 80 m below the lava/dike transition zone in the Pito Deep (a tectonic window intothe SEPR). Geochemical data from the fault zone indicates that cold (<150°C)and hot (<390°) fluids coexisted at the same time whilst the hydrothermal system was active. A numerical model (HYDROTHERM) developed by the USGS was used to recreate the geological settings in the SEPR in order to try to model the hydrothermal activity and fluid flow. The model solves two governingpartial differential equations numerically, the water component flow equation(Darcy law for flow in porous media) and the thermal energy transport equation(conservation of enthalpy for the water component and the porous media). The result of the modeling indicates that cold seawater can penetrate from the relatively permeable volcanic material into a highly permeable fault zone in the sheeted dike unit. The cooler seawater fluid flows down the fault zone,reheats and flows up again in a narrow upflow zone at the edge of the fracture/sheeted dike boundary. The result is a horizontal temperature gradient created in the fractured zone supporting the theory that hot and cold fluids can coexist in a fault hosted hydrothermal zone.

  • 35.
    Blazeviciute, Lina
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Illustrative ElectricitySupply Scenarios and Sustainable Development in Lithuania2014Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Lithuania has limited domestic energy resources, and is therefore, heavily dependent on imports of oil products and natural gas. Lithuania imported around 90% of its oil and 100% of natural gas in 2009. Particularly, after the accession to the European Union (EU), and decommissioning of main electricity generation source Ignalina Nuclear Power Plant (NPP), energy security became one of the main concerns. Therefore, it is vital to evaluate different pathways the country could take in order to achieve desirable energy security, and ensure sustainable development of the energy system in Lithuania. The study was conducted using LEAP, the Long range Energy Alternatives Planning System, to develop energy policy analysis. Different scenarios presented in the report show how Lithuanian energy system would react in given different circumstances. Moreover, it demonstrates how implementation of existing energy projects separately or combined together would affect the level of energy security and sustainability in Lithuania.

    The research shows that current government policies could lead Lithuania to more secure and sustainable energy future. However, in a long run higher investments in renewable energy might be more environmentally and economically competitive alternative.

  • 36.
    Boldkhuyag, Enkhtuya
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Values and pro environmental behaviour among Mongolian adolescents:Implications for ESD2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The study aims to contribute in the understanding of key values and behaviours for

    Education for sustainable development and their correlations and to further develop

    knowledge about how they are distributed among upper secondary school students in

    relation to socio-demographic factors. There were 274 surveys collected in 5 different

    schools in Ulaanbaatar and analysed using ANOVA followed by Tukey test and

    Pearson’s correlation tests.

    The study supports the findings of previous research that universal, benevolence and

    traditional values are positively correlated with a positive environmental behaviour.

    The positive orientation towards sustainability suggest that the current adolescent

    Mongolian population can become potential environmental supporters with a strong

    motivation towards sustainable behaviour and attitudes. The demographic and social

    factors were weak in relation to value orientations, no significant difference observed

    in value orientation. There was a notable gender difference in pro environmental

    behaviour which aligned with many existing academic studies.

    Social factors in relation to environmentally friendly attitude suggested that pro

    environmental adolescents were somehow exposed to the natural environment and

    read books during their free time displayed increasingly positive behaviour toward the

    environment. Therefore this study emphasises the importance of encouraging informal

    outdoor activities and increasing the access and popularity of reading books among

    youths. These measures would also serve to strengthen the benevolence value and

    promote pro environmental behaviour.

  • 37.
    Boonstra, Wiebren J.
    et al.
    Stockholm Univ, Stockholm Resilience Ctr, S-10691 Stockholm, Sweden..
    Hanh, Tong Thi Hai
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Naturresurser och hållbar utveckling.
    Adaptation to climate change as social-ecological trap: a case study of fishing and aquaculture in the Tam Giang Lagoon, Vietnam2015Inngår i: Environment, Development and Sustainability, ISSN 1387-585X, E-ISSN 1573-2975, Vol. 17, nr 6, s. 1527-1544Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The ways in which people respond to climate change are frequently analyzed and explained with the term "adaptation." Conventionally, adaptation is understood as adjustments in behavior either to mitigate harm or to exploit opportunities emerging from climate change. The idea features prominently in scientific analyses as well as in policy programs. Despite its growing popularity over the years, the concept has also received critique. Social scientists in particular take issue with the implicit assumptions about human behavior and "fitness advantages" (or optimal behavior) that come with the term. Clearly, not all human and animal behavioral responses are "optimal" or display "fitness advantages." To the contrary, sub-optimal and maladaptive behavior is rather widespread. Explaining the possibility of maladaptive or sub-optimal behavior led scholars to introduce the idea of "traps." Trap situations refer to a mismatch between behavior and the social and/or ecological conditions in which this behavior takes place. This paper reviews the analytical value of traps for the study of human responses to climate change. It first lays out the theoretical assumptions underpinning the concept. A case study of the Tam Giang Lagoon, in central Vietnam, is used to evaluate how well the trap concept captures the sub-optimality and variety of human responses to climate change.

  • 38.
    Bordiga, Manuela
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Bartol, Milos
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Henderiks, Jorijntje
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    Absolute nannofossil abundance estimates: quantifying the pros and cons of different techniques2015Inngår i: Revue de Micropaléontologie, Vol. 58, nr 3, s. 155-165Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A quick and inexpensive method to determine absolute nannofossil abundance in deep sea sediments – the “drop” technique (modified dilution method) – was compared to two other available methods – the filtration and random settling techniques. All techniques rely on the same basic principle, under which a volume of known concentration (bulk sediment weight/mL) is distributed evenly over a known total area (glass slide or filter) to then count particles within a set of (randomly) selected fields of view. The three preparation techniques were also calibrated by spiking the samples with microbeads to approach the “real values” as closely as possible. Significant offsets in abundance estimates between methods mainly reflect bias due to the uneven distribution and/or loss of particles. We show that the drop technique is most consistent and accurate in estimating “real values” and offers similar or better reproducibility than the other techniques. The drop method also allows detection of the same trends with or without calibration with microbeads. The filtration method holds the risk to drastically underestimate absolute abundances, while the settling technique is demanding in terms of time and may suffer from advection processes. The composition of nannofossil assemblages can be reliably determined by any of the three different techniques.

  • 39.
    Borgersen, Anna
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Business models for sustainable investments in the context of tropical forest restoration2017Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The Tropics continue to provide the most biologically diverse and carbon rich forest in the world, but they are being lost at alarming rates. To meet the global climate change targets and the UN sustainable development goals, financing is urgently needed to speed up and increase tropical forest restoration. The aim of this thesis is to show that sustainable timber and non-timber forest products offer are a viable vehicle for investment in tropical forest restoration and to identify the needed incentives and tools to enable sustainable investment.

     

    There is a lack of research on the integration between business model design and sustainability generally and an absence of business models for tropical forest restoration. Very little research if any, has been undertaken to link the two and evaluate the feasibility of applying business models on tropical forest restoration, especially with regard to its potential as an interesting investment option. This thesis gives a background about tropical forest restorations, sustainable investment, presents three tropical reforestation projects and a conceptual framework. The conceptual framework will be used to evaluate the potential for business model application to finance restoration and enable sustainable investments.

     

    Using a business model for tropical forest restoration projects, which in most cases are not defined as businesses, is an innovative approach and an agent of needed radical change. A business model is a crucial strategic management tool to enable success of tropical forest restorations. The core logic of the business model can offer equitable customer value and the fulfillment of new types of needs. Merging economic development and forest restoration is a powerful tool for innovation. The critical variables for financing are management, monitoring, operational efficiency, political incentives and regulations, stakeholder involvement, community benefits, transparency and information communication technology.

  • 40.
    Borinder, Niclas
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Postcranial anatomy of Tanius sinensis Wiman, 1929 (Dinosauria; Hadrosauroidea)2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Tanius sinensis Wiman, 1929 was one of the first hadrosauroid or “duck-billed” taxa erected from China, indeed one of the very first non-avian dinosaur taxa to be erected based on material from the country. Since the original description by Wiman in 1929, the anatomy of T. sinensis has received relatively little attention in the literature since then. This is unfortunate given the importance of T. sinensis as a possible non-hadrosaurid hadrosauroid i.e. a member of Hadrosauroidea outside the family of Hadrosauridae, living in the Late Cretaceous, at a time when most non-hadrosaurid hadrosauroids had become replaced by the members of Hadrosauridae. To gain a better understanding of the anatomy of T. sinensis and its phylogenetic relationships, the postcranial anatomy of it is redescribed. T. sinensis is found to have a mosaic of basal traits like strongly opisthocoelous cervical vertebrae, the proximal end of scapula being dorsoventrally wider than the distal end, the positioning of the ventral apex of the supra-acetabular process of the ilium, posterodorsally to the ischial peduncle, the ratio between the proximodistal length of the metatarsal III and the mediolateral width of this element being greater than 4.5. Derived traits present in T. sinensis include curved dorsal surface of the scapula, arcuate fourth trochanter of the femur, cnemial crest of the tibia extending ventrally into the proximal half of the shaft, and the distal end of the fibula expanding into a club shape in lateral view. A potential autapomorphy is noted, being the caudal fusion of the medial and lateral condyles of the femur forming a completely enclosed “tunnel”. The body mass of the holotype of T. sinensis, is also estimated, and found to have been around 2950 kg. The phylogenetic analysis agrees with previous studies placing T. sinensis as a non-hadrosaurid hadrosauroid. Furthermore, in the phylogenetic analysis, T. sinensis is recovered as non-hadrosaurid hadrosauroid, forming a clade with Bactrosaurus johnsoni Gilmore, 1933, which shares the following unambiguous synapomorphies; the width of the orbital margin of the jugal being almost equally wide to that of the infratemporal margin of the bone; the ratio between the mediolateral width of the skull roof across the postorbitals and that across the quadrate cotyli of the paired squamosals being more than 1.20.

  • 41.
    Borinder, Niclas H.
    et al.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Poropat, Stephen F.
    Australian Age Dinosaurs Nat Hist Museum, Winton, Qld 4735, Australia.;Monash Univ, Wellington Rd, Clayton, Vic 3800, Australia..
    Kear, Benjamin P.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Reassessment of the earliest documented stegosaurian fossils from Asia2016Inngår i: Cretaceous research (Print), ISSN 0195-6671, E-ISSN 1095-998X, Vol. 68, s. 61-69Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In 1929, the famous Swedish palaeontologist Carl Wiman documented the first unequivocal stegosaurian dinosaur fossils from Asia. His material comprised an isolated dermal spine, together with a dorsal vertebra that was briefly described but never figured. Since then these remains have languished in obscurity, being noted in some stegosaur review articles but often ignored altogether. However, recent auditing of the Museum of Evolution palaeontological collection at Uppsala University in Sweden has led to the rediscovery of Wiman's original specimens, as well as two additional previously unrecognised stegosaurian dorsal vertebrae. All of these bones derive from the Lower Cretaceous (Berriasian-Valanginian) Mengyin Formation of Shandong Province in eastern China, and are morphologically compatible with the stratigraphically proximal stegosaurian taxon Wuerhosaurus from the Valanginian-Albian Tugulu Group in the Xinjiang Uyghur Autonomous Region of Western China. Wirnan's seminal stegosaurian fossils thus expand current palaeobiogeographical distributions, and contribute to the otherwise enigmatic record of Early Cretaceous stegosaurian occurrences.

  • 42.
    Boström, Erik
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Avrinningens variation i det boreala landskapet: - en fallstudie i Strömsjöliden2015Independent thesis Advanced level (professional degree), 20 poäng / 30 hpOppgave
  • 43. Botting, Joseph P.
    et al.
    Cardenas, Paco
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Farmaceutiska fakulteten, Institutionen för läkemedelskemi, Avdelningen för farmakognosi. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Systematisk biologi.
    Peel, John S.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Paleobiologi.
    A Crown-Group Demosponge from the Early Cambrian Sirius Passet Biota, North Greenland2015Inngår i: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 58, nr 1, s. 35-43Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Calibration of the divergence times of sponge lineages and understanding of their phylogenetic history are hampered by the difficulty in recognizing crown versus stem groups in the fossil record. A new specimen from the lower Cambrian (Series 2, Stage 3; approximately 515Ma) Sirius Passet Biota of North Greenland has yielded a diagnostic spicule assemblage of the extant demosponge lineages Haploscleromorpha and/or Heteroscleromorpha. The specimen has disarticulated approximately in situ, but represents an individual sponge that possessed monaxon spicules combined with a range of slightly smaller sigma, toxa and unique spiral morphologies. The combination of spicule forms, together with their relatively large size, suggests that the sponge represents the stem lineage of Haploscleromorpha+Heteroscleromorpha. This is the first crown-group demosponge described from the early Cambrian and provides the most reliable calibration point currently available for phylogenetic studies.

  • 44.
    Bovin, Kajsa
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper, Luft-, vatten och landskapslära.
    Avgränsning av tillrinningsområden till grundvattenmagasin: vilken information ger berggrundens överyta?2011Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Delineation of recharge areas for aquifers is performed in the groundwater mapping process at the Swedish geological survey, SGU. This work is time consuming and performed manually. It is therefore desirable to develop a more general and repeatable method for defining recharge areas for aquifers.

    The purpose of this study was to investigate two other possible methods to delineate recharge areas for aquifers. The first method was to examine the possibility of using the topography of the bedrock to define the recharge areas for aquifers. To enable this, a method for generating the topography of the bedrock was developed. The recharge area could then be defined by using the Arc Hydro Tools in ArcMap. The second method was to examine whether topographic water divides delimited from the ground surface topography could be used to delineate recharge areas for aquifers. For this purpose, topographic water divides from Svenskt Vatten ARkiv (SVAR) were used.

    The results show that it is possible to generate the topography of the bedrock by using information about the soil depth from the databases at SGU for small areas with a lot of data. In order to do the same over a larger area, for example the whole of Sweden, more data and perhaps other methods are needed. The topography of the bedrock gives a lot of new information in areas where the topography of the groundwater surface does not follow the topography of the ground surface, for example where deep soils with high hydraulic conductivity occur. In the outer part of the recharge areas thin layers of soil and outcrops often occur. This means that the topography of the bedrock is very similar to the topography of the ground surface and therefore does not give much new information.

    Recharge areas delineated from the bedrock topography are very large. This method is not complex enough to calculate the delineation of recharge areas using only the bedrock topography as an input. However, the bedrock topography can be used together with other information, especially the topography of the groundwater surface but also information about soil types and bedrock. The bedrock topography can also serve as background information in the work with delimiting recharge areas as it is done today.

    It is further shown that the topographic sub-catchments from SVAR are not suitable for defining recharge areas for aquifers. This is partly because the areas of the sub-catchments are entirely dependent on which point they are defined from and these points are chosen arbitrarily along the streams, and partly because the drainage direction of the sub-catchments is difficult to take into account when using this method.

  • 45.
    Bravo, Andrea Garcia
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Zopfi, Jakob
    Aquatic and Stable Isotope Biogeochemistry, University of Basel, Basel CH-4056, Switzerland.
    Buck, Moritz
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Jingying, Xu
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Bertilsson, Stefan
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och genetik, Limnologi. Uppsala universitet, Science for Life Laboratory, SciLifeLab.
    Schaefer, Jeffra K.
    Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, USA.
    Poté, John
    Environmental Biogeochemistry and Ecotoxicology, University of Geneva, Geneva CH-1205, Switzerland.
    Cosio, Claudia
    Environmental Biogeochemistry and Ecotoxicology, University of Geneva, Geneva CH-1205, Switzerland.;Unité Stress Environnementaux et BIOSurveillance des Milieux Aquatiques UMR-I 02 (SEBIO), Université de Reims Champagne Ardenne, Reims F-51687, France.
    Geobacteraceae are important members of mercury-methylating microbial communities of sediments impacted by waste water releases2018Inngår i: The ISME Journal, ISSN 1751-7362, E-ISSN 1751-7370, Vol. 12, s. 802-812Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Microbial mercury (Hg) methylation in sediments can result in bioaccumulation of the neurotoxin methylmercury (MMHg) in aquatic food webs. Recently, the discovery of the gene hgcA, required for Hg methylation, revealed that the diversity of Hg methylators is much broader than previously thought. However, little is known about the identity of Hg-methylating microbial organisms and the environmental factors controlling their activity and distribution in lakes. Here, we combined high-throughput sequencing of 16S rRNA and hgcA genes with the chemical characterization of sediments impacted by a waste water treatment plant that releases significant amounts of organic matter and iron. Our results highlight that the ferruginous geochemical conditions prevailing at 1–2 cm depth are conducive to MMHg formation and that the Hgmethylating guild is composed of iron and sulfur-transforming bacteria, syntrophs, and methanogens. Deltaproteobacteria, notably Geobacteraceae, dominated the hgcA carrying communities, while sulfate reducers constituted only a minor component, despite being considered the main Hg methylators in many anoxic aquatic environments. Because iron is widely applied in waste water treatment, the importance of Geobacteraceae for Hg methylation and the complexity of Hgmethylating communities reported here are likely to occur worldwide in sediments impacted by waste water treatment plant discharges and in iron-rich sediments in general.

  • 46.
    Bray, Jamieson
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Geovetenskapliga sektionen, Institutionen för geovetenskaper.
    Cultural Cognition and Climate Change: Communicating climate science across potential divides in Sweden2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    Human civilization is failing in the fight to reduce carbon dioxide emissions and limit the impact of anthropogenic climate change. Whilst there are likely numerous reasons for this inertia, societal risk perception plays a fundamental role in influencing the speed and effectiveness of political and social action to address climate change. This study presents the psychological, sociological and cultural reasons for variations in the perceptions of risk amongst a group of climate change sceptics in Sweden. Highlighting cognitive barriers and characteristics associated with different ideological biases and worldviews. The paper concludes that people become more or less sceptical to climate change based on a variety of potentially intersectional issues. Whilst gender, age and wisdom all play a role, the social groups with which people identify, as well as individuals’ values and ideas of what constitutes an ideal society ultimately shape ones perception of risk in relation to climate change. The implications for the communication of climate science are discussed, revealing that any inclusive communication strategy will fail unless it is presented in a way that affirms rather than challenges one’s cultural identity.

     

  • 47.
    Bremer, Oskar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Distribution of Silurian vertebrates on Gotland, Sweden2016Konferansepaper (Annet vitenskapelig)
  • 48.
    Bremer, Oskar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Geology, stratigraphy, and fossil vertebrates of Gotland, Sweden: a review2016Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    The Silurian limestones of Gotland, Sweden, and their exceptionally well-preserved fossils have attracted the interest of scientists for more than 200 years. The sedimentary rocks represent approximately 10 million years of time, and were deposited in a shallow, equatorial inland sea named the Baltic Basin. The majority of the sediments are composed of reef-associated strata, but a general transition can be seen along the strike from shallow water in the northeast to deeper shelf environments in the southwest. The understanding of the stratigraphy and the geology of Gotland has greatly improved during the last decades. This research on Gotland has also led to the discovery of a series of stable isotope excursions and extinctions among several faunal groups. These events were probably linked to cycles in atmospheric and oceanic states, and three of them have been recognized globally. The Baltic Basin was also home to a variety of early vertebrates. The first fossil vertebrates from Gotland were reported in 1861, but the most extensive study of these early fishes was performed in the late 1900s. More recently it was shown that the vertebrates were also affected by one of the extinction events. This thesis is an extensive review of previous work and will form a geological basis for future studies. In this work, all previous reports of vertebrates have been gathered, reviewed, and the old samples have been placed in an updated stratigraphical framework. The scale taxonomy of Gotland vertebrates, including the Baltic acanthodians, has been evaluated and partly revised. Additionally, the depositional environments of the sampled areas have been investigated. Studying the vertebrates of Gotland is important for understanding the distribution of vertebrates through time and in different environments during the Silurian. Initial results indicate environmental preferences among vertebrates on both group and species-level, which may prove useful for testing the vertebrate biozonation developed for the Silurian.

    Delarbeid
    1. An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    Åpne denne publikasjonen i ny fane eller vindu >>An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    2015 (engelsk)Inngår i: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, nr 1, s. 13-18Artikkel i tidsskrift (Fagfellevurdert) Published
    Emneord
    vertebrate distribution, stratigraphy, facies, Silurian events, Gotland, Sweden
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-251824 (URN)10.3176/earth.2015.03 (DOI)000351327700004 ()
    Tilgjengelig fra: 2015-04-27 Laget: 2015-04-24 Sist oppdatert: 2017-08-21
    2. Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Åpne denne publikasjonen i ny fane eller vindu >>Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Vise andre…
    2018 (engelsk)Inngår i: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, Vol. 155, nr 7, s. 1523-1541Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Vertebrate microremains from the upper Silurian Winnica Formation in the Holy Cross Mountains, Poland are described from the Winnica and Rzepin sections. Both sites record the uppermost part of the Supianka Member, but represent different depositional environments. The Winnica samples come from a low-energy environment, while the Rzepin sample was taken from a high-energy, oolitic facies. Both sites contain thelodonts Thelodus parvidens, Thelodus trilobatus, an anaspid cf. Liivilepis and a number of acanthodian scales of 'nostolepid', poracanthodid and 'gomphonchid' types. Notable differences between the sites are the addition of the osteostracan Tahulaspis cf. ordinata, the thelodont Paralogania ludlowiensis and acanthodian scales identified as Nostolepis gracilis in the Rzepin section. Placing the vertebrate faunas within the vertebrate biozonation established for the Silurian proved difficult. The suggested late Ludlow age for the Supianka Member based on sequence stratigraphical and chemostratigraphical correlations cannot be definitely confirmed or refuted, but a late Ludfordian age seems the most plausible based on invertebrate and vertebrate faunas. The much lower abundance of poracanthodid acanthodians in the Rzepin sample supports the notion of Poracanthodes porosus Zone as a deep-water equivalent to a number of vertebrate biozones. The presence of P. ludlowiensis only in the oolitic sample confirms a long temporal range, but restricted environmental distribution for this taxon.

    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-281657 (URN)10.1017/S0016756817000681 (DOI)000443814900008 ()
    Tilgjengelig fra: 2016-03-29 Laget: 2016-03-29 Sist oppdatert: 2018-11-06bibliografisk kontrollert
  • 49.
    Bremer, Oskar
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Silurian vertebrates of Gotland (Sweden) and the Baltic Basin2017Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    During the Silurian, the Swedish island Gotland was positioned close to the equator and covered by a shallow sea called the Baltic Basin. The sedimentary rocks (predominantly carbonates) comprising most of the island today were initially formed in this warm sea, and the relatively complete succession of rocks often contains fossil fragments and scales from early vertebrates, including heterostracans, anaspids, thelodonts, osteostracans, acanthodians, and a stem-osteichthyan. Fossils of early vertebrates become increasingly more common in younger Silurian rocks, but are mostly represented by fragmentary remains and rarer occurrences of articulated jawless vertebrates (agnathans). However, the record of articulated specimens and jawed vertebrates (gnathostomes) are more numerous in rocks of the following Devonian Period. Isolated peaks of agnathan diversity during the Silurian and disarticulated remains of gnathostomes from this period hint at a cryptic evolutionary history. A micropaleontological approach with broader sampling may provide a better understanding of early vertebrate distribution patterns and hopefully give some insights into this history. The objective of this study was to build upon previous sampling on Gotland and to use established frameworks for disarticulated remains with the aim of making comparisons with similar studies performed in the East Baltic. However, difficulties locating the collections from these previous works necessitated a different focus. Undescribed museum collections and newly sampled material enabled some taxonomical revisions and greatly improved the understanding of vertebrate distribution in the youngest part of the Gotland sequence. It also indicated that this interval may represent the early stages of the diversification of gnathostomes that become increasingly dominant toward the end of the Silurian. Furthermore, the description of samples from partly coeval sections in Poland enabled some preliminary comparisons outside of Gotland, and presented a striking example of restricted environmental occurrences for a thelodont taxon. This is encouraging for future sampling and investigations on Gotland. Together with the establishment of a facies-framework comparable to that developed in the East Baltic and correlations to other areas, this may prove fruitful for an increased understanding of early vertebrate distribution and evolution during the Silurian.

    Delarbeid
    1. An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    Åpne denne publikasjonen i ny fane eller vindu >>An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland
    2015 (engelsk)Inngår i: Estonian journal of earth sciences, ISSN 1736-4728, E-ISSN 1736-7557, Vol. 64, nr 1, s. 13-18Artikkel i tidsskrift (Fagfellevurdert) Published
    Emneord
    vertebrate distribution, stratigraphy, facies, Silurian events, Gotland, Sweden
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-251824 (URN)10.3176/earth.2015.03 (DOI)000351327700004 ()
    Tilgjengelig fra: 2015-04-27 Laget: 2015-04-24 Sist oppdatert: 2017-08-21
    2. End-Wenlock terminal Mulde carbon isotope excursion in Gotland, Sweden: Integration of stratigraphy and taphonomy for correlations across restricted facies and specialized faunas
    Åpne denne publikasjonen i ny fane eller vindu >>End-Wenlock terminal Mulde carbon isotope excursion in Gotland, Sweden: Integration of stratigraphy and taphonomy for correlations across restricted facies and specialized faunas
    Vise andre…
    2016 (engelsk)Inngår i: Palaeogeography, Palaeoclimatology, Palaeoecology, ISSN 0031-0182, E-ISSN 1872-616X, Vol. 457, s. 304-322Artikkel i tidsskrift (Fagfellevurdert) Published
    HSV kategori
    Forskningsprogram
    Geovetenskap med inriktning mot historisk geologi och paleontologi
    Identifikatorer
    urn:nbn:se:uu:diva-299498 (URN)10.1016/j.palaeo.2016.06.031 (DOI)000380598800025 ()
    Tilgjengelig fra: 2016-07-21 Laget: 2016-07-21 Sist oppdatert: 2017-08-21
    3. Vertebrate remains and conodont biostratigraphy in the Ludlow Burgsvik Formation of Gotland, Sweden
    Åpne denne publikasjonen i ny fane eller vindu >>Vertebrate remains and conodont biostratigraphy in the Ludlow Burgsvik Formation of Gotland, Sweden
    (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-328226 (URN)
    Tilgjengelig fra: 2017-08-20 Laget: 2017-08-20 Sist oppdatert: 2017-08-25
    4. Vertebrate dermal remains and conodont distribution in the upper Silurian Hamra and Sundre formations of Gotland, Sweden
    Åpne denne publikasjonen i ny fane eller vindu >>Vertebrate dermal remains and conodont distribution in the upper Silurian Hamra and Sundre formations of Gotland, Sweden
    (engelsk)Manuskript (preprint) (Annet vitenskapelig)
    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-328227 (URN)
    Tilgjengelig fra: 2017-08-20 Laget: 2017-08-20 Sist oppdatert: 2017-08-21
    5. Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Åpne denne publikasjonen i ny fane eller vindu >>Vertebrate microremains from the upper Silurian Winnica Formation of the Holy Cross Mountains, Poland
    Vise andre…
    2018 (engelsk)Inngår i: Geological Magazine, ISSN 0016-7568, E-ISSN 1469-5081, Vol. 155, nr 7, s. 1523-1541Artikkel i tidsskrift (Fagfellevurdert) Published
    Abstract [en]

    Vertebrate microremains from the upper Silurian Winnica Formation in the Holy Cross Mountains, Poland are described from the Winnica and Rzepin sections. Both sites record the uppermost part of the Supianka Member, but represent different depositional environments. The Winnica samples come from a low-energy environment, while the Rzepin sample was taken from a high-energy, oolitic facies. Both sites contain thelodonts Thelodus parvidens, Thelodus trilobatus, an anaspid cf. Liivilepis and a number of acanthodian scales of 'nostolepid', poracanthodid and 'gomphonchid' types. Notable differences between the sites are the addition of the osteostracan Tahulaspis cf. ordinata, the thelodont Paralogania ludlowiensis and acanthodian scales identified as Nostolepis gracilis in the Rzepin section. Placing the vertebrate faunas within the vertebrate biozonation established for the Silurian proved difficult. The suggested late Ludlow age for the Supianka Member based on sequence stratigraphical and chemostratigraphical correlations cannot be definitely confirmed or refuted, but a late Ludfordian age seems the most plausible based on invertebrate and vertebrate faunas. The much lower abundance of poracanthodid acanthodians in the Rzepin sample supports the notion of Poracanthodes porosus Zone as a deep-water equivalent to a number of vertebrate biozones. The presence of P. ludlowiensis only in the oolitic sample confirms a long temporal range, but restricted environmental distribution for this taxon.

    HSV kategori
    Identifikatorer
    urn:nbn:se:uu:diva-281657 (URN)10.1017/S0016756817000681 (DOI)000443814900008 ()
    Tilgjengelig fra: 2016-03-29 Laget: 2016-03-29 Sist oppdatert: 2018-11-06bibliografisk kontrollert
  • 50.
    Bremer, Oskar
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Blom, Henning
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Biostratigraphy of early vertebrates on Gotland2014Inngår i: 4th Annual Meeting of IGCP 591, Estonia, 10 - 19 June 2014.: Abstracts and Field Guide / [ed] Heikki Bauert, Olle Hints, Tõnu Meidla & Peep Männik, Tartu: University of Tartu, 2014, s. 21-21Konferansepaper (Annet vitenskapelig)
1234567 1 - 50 of 541
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