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Backéus, Ingvar
Publications (10 of 68) Show all publications
Backéus, I. (2018). Om São Tomé, begonior och öar i havet. Svensk Botanisk Tidskrift, 112(1), 32-40
Open this publication in new window or tab >>Om São Tomé, begonior och öar i havet
2018 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 112, no 1, p. 32-40Article in journal (Refereed) Published
Abstract [en]

A brief overview of the vegetation of São Tomë and Príncipe is presented. The several endemic and large species of Begonia on the islands are discussed in more detail.

National Category
Ecology
Research subject
Biology with specialization in Ecological Botany
Identifiers
urn:nbn:se:uu:diva-349018 (URN)
Available from: 2018-04-19 Created: 2018-04-19 Last updated: 2018-05-02Bibliographically approved
Backéus, I., Hytteborn, H. & Rydin, H. (2018). Var Sellingaffären kulmen på en sekellång botanisk konflikt?. Svensk Botanisk Tidskrift, 112(6), 380-393
Open this publication in new window or tab >>Var Sellingaffären kulmen på en sekellång botanisk konflikt?
2018 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 112, no 6, p. 380-393Article in journal (Refereed) Published
Abstract [en]

The 1950s saw a series of miscarriages of justice against public persons in Sweden. In one of these, the Royal Swedish Academy of Sciences tried to force Olof Selling from his professorship in paleobotany at the Swedish Museum of Natural History, on the basis of mental illness, but this failed after a long and public calamity. In his book Naturen inför rätta [Nature facing trial], Keith Wijkander (2017) claims that Selling was the victimof a century-long conflict between botanists in Uppsala and Stockholm,and places Selling in the Uppsala camp. We try to give a more balanced picture of the relationships between plant ecology in Uppsala and Stockholm during the early 20th century. R. Sernander, L.-G. Romell and G. E. Du Rietz are among the main actors. The fierce debates between the two camps make this an interesting period in Swedish botany.

National Category
Ecology
Research subject
Biology with specialization in Ecological Botany
Identifiers
urn:nbn:se:uu:diva-371067 (URN)
Available from: 2018-12-19 Created: 2018-12-19 Last updated: 2019-02-20Bibliographically approved
Ssenku, J. E., Ntale, M., Backéus, I. & Oryem-Origa, H. (2017). Phytoremediation potential of Leucaena leucocephala (Lam.) de Wit. for heavy metal-polluted and heavy metal-degraded environments.. In: K. Bauddh, B. Singh & J. Korstad (Ed.), Phytoremediation potential of bioenergy plants: (pp. 189-209). Springer
Open this publication in new window or tab >>Phytoremediation potential of Leucaena leucocephala (Lam.) de Wit. for heavy metal-polluted and heavy metal-degraded environments.
2017 (English)In: Phytoremediation potential of bioenergy plants / [ed] K. Bauddh, B. Singh & J. Korstad, Springer, 2017, p. 189-209Chapter in book (Other academic)
Abstract [en]

Regeneration of heavy metal-polluted and heavy metal-degraded sites has remained a global challenge despite the existence of numerous conventional physico-chemical techniques that can be applied. In view of the large size of the degraded areas and the cost implications, the application of the inexpensive “green” and sustainable technique of phytoremediation is unrivalled by any other possible alternative techniques. However, its effectiveness is largely dependent on judicious selection of the plant to be used. We thus assessed the suitability of Leucaena leucocephala for phytoremediation of heavy metal-polluted and heavy metal-degraded sites. L. leucocephala has numerous inherent characteristics that can be exploited to augment phytoremediation and lower the cost of regenera- tion. The species can survive in harsh environmental conditions with the excep- tion of heavily frosted conditions and occurs in a wide range of ecological settings. The species is fast growing, capable of reaching maturity in 6 to 7 months to produce a vast amount of seeds that can germinate into numerous seedlings to carry on further remediation of the polluted site. It can produce large quantities of phytomass that can accumulate heavy metals and can repeatedly be harvested to regenerate a polluted area through phytoextraction. Heavy metal- laden phytomass of L. leucocephala moulds into furniture and is used for con- struction to preclude contamination at the site of use. It is excellent on coppicing, thus eliminating the costs of replanting during the phytoremediation programme. The species is endowed with high pro ciency for nitrogen xation through nod- ule formation and can substantially revitalize microbial mass and micro- bioactivities to pave way for re-establishment of self-sustaining plant communities over the polluted sites. Its exibility to nodulate with rhizobia of other legumes and its rhizobia to nodulate with other legumes could optimize nitrogen content revitalization of the polluted soils. However, the species is invasive and could be adopted under stringent measures to avoid its spread. It is also very palatable to animals and may thus be of limited application in the phytoremediation of areas accessible to animals. Suitability of the species in heavily polluted areas is mini- mal as many of the inherent characteristics may not fully be expressed. 

Place, publisher, year, edition, pages
Springer, 2017
Keywords
Bioenergy plants Phytoremediation Restoration Heavy metals Phytosiderophore Hyper-accumulation
National Category
Environmental Engineering
Identifiers
urn:nbn:se:uu:diva-319269 (URN)10.1007/978-981-10-3084-0_7 (DOI)978-981-10-3083-3 (ISBN)978-981-10-3084-0 (ISBN)
Funder
Sida - Swedish International Development Cooperation Agency
Available from: 2017-04-03 Created: 2017-04-03 Last updated: 2017-04-28Bibliographically approved
Backéus, I. & Emanuelsson, U. (2016). The rural landscapes of Northeast Asia.. Stockholm: Fri Tanke
Open this publication in new window or tab >>The rural landscapes of Northeast Asia.
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2016 (English)Book (Other academic)
Place, publisher, year, edition, pages
Stockholm: Fri Tanke, 2016. p. 441
Series
Acta phytogeographica Suecica, ISSN 0084-5914 ; 89
National Category
Biological Sciences
Identifiers
urn:nbn:se:uu:diva-302544 (URN)978-91-87935-49-7 (ISBN)
Available from: 2016-09-05 Created: 2016-09-05 Last updated: 2016-11-01Bibliographically approved
Backéus, I. (2015). Ett etnobotaniskt livsverk. Svensk Botanisk Tidskrift, 109(6), 346-347
Open this publication in new window or tab >>Ett etnobotaniskt livsverk
2015 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 109, no 6, p. 346-347Article in journal (Refereed) Published
Abstract [sv]

Vagn J. Brøndegaard skrev mer än 1600 artiklar om allt som hade med relationen mellan växter och människor att göra. Många av dessa har nu ställts samman i två vackra volymer.

Keywords
etnobotanik Danmark Brøndegaard
National Category
Botany
Research subject
Biology with specialization in Systematics
Identifiers
urn:nbn:se:uu:diva-295794 (URN)
Available from: 2016-06-09 Created: 2016-06-09 Last updated: 2017-11-30Bibliographically approved
Ssenku, J., Ntale, M., Backéus, I. & Oryem-Origa, H. (2014). Assessment of seedling establishment and growth performance of Leucaena leucocephala (Lam.) De Wit., Senna siamea (Lam.) H.S. Irwin & Barneby and Eucalyptus grandis W.Hill ex Maid. in amended and untreated pyrite and copper tailings. Journal of Biosciences and Medicines, 2, 33-50
Open this publication in new window or tab >>Assessment of seedling establishment and growth performance of Leucaena leucocephala (Lam.) De Wit., Senna siamea (Lam.) H.S. Irwin & Barneby and Eucalyptus grandis W.Hill ex Maid. in amended and untreated pyrite and copper tailings
2014 (English)In: Journal of Biosciences and Medicines, ISSN 2327-5081, Vol. 2, p. 33-50Article in journal (Refereed) Published
Abstract [en]

Growth and survival performance of Leucaena leucocephala (Lam.) De Wit., Senna siamea Lam. andEucalyptus grandis W. Hill ex Maid. in amended and untreated pyrite and copper tailings wereevaluated under field conditions. The physico-chemical characteristics of the pyrite soil and tailingswere determined. Growth in height, basal diameter and later dbh, relative growth rate due toheight (RGRh) and basal diameter (RGRd) and survival were determined every after six months. Asplit block experimental design was used and the data collected were analyzed using a statisticalpackage R, with an additional package lme4. Tailings and pyrite soils had extremely low pH, poornutritional status, low organic matter content and elevated concentrations of available heavymetals as compared to the unpolluted soils and treated pyrite soil and copper tailings. Growthperformance was extremely poor on the untreated pyrite soil and copper tailings for all the speciesbut significantly enhanced by the application of compost and limestone. Treatment had a significanteffect on all parameters at all sites. Eucalyptus grandis displayed a higher potential ofphytomass accumulation than Leucaena leucocephala and Senna siamea. Even though Leucaenaleucocephala grew fastest reaching reproductive maturity in 7 months after planting, relative growth rates of the three species were not significantly different at all sites. The three species canbe used for phytostabilisation of the tailings at Kilembe tailings dam sites (KTDS) after treatmentwhile at Low polluted pyrite trail site (LPPTS) and Highly polluted pyrite trail sites (HPPTS) Sennasiamea is more suitable as Eucalyptus grandis and Leucaena leucocephala are susceptible to attacks by Syncerus caffer (Buffalos) and Kobus kob thomasi (Uganda Kob).

Keywords
seedling establishment, growth performance, pyrite, phytostabilization, tailings, QECA
National Category
Ecology
Identifiers
urn:nbn:se:uu:diva-220941 (URN)10.4236/jbm.2014.21005 (DOI)
Funder
Sida - Swedish International Development Cooperation Agency
Available from: 2014-03-24 Created: 2014-03-24 Last updated: 2014-03-26Bibliographically approved
Ssenku, J. E., Ntale, M., Backéus, I., Lehtilä, K. & Oryem-Origa, H. (2014). Dynamics of plant species during phytostabilisation of copper mine tailings and pyrite soils, Western Uganda. Journal of Environmental Engineering & Ecological Science, 3
Open this publication in new window or tab >>Dynamics of plant species during phytostabilisation of copper mine tailings and pyrite soils, Western Uganda
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2014 (English)In: Journal of Environmental Engineering & Ecological Science, ISSN 2050-1323, Vol. 3Article in journal (Refereed) Published
Abstract [en]

Introduction: Destruction of vegetation resources emanating from deposition of mine wastes is a serious environmental problem. Conventional plant species restoration methodologies are costly and feasible only on a small scale. The current study was focussed on developing phytostabilisation protocols involving the application of limestone, compost, selected tree species and assessing the re-establishment of plants in polluted soils.

Methods: Early establishment of plant species under Eucalyptus grandis, Senna siamea and Leucaena leucocephala planted on mine tailings and pyrite soils amended with compost, limestone and limestone+compost was studied. Four plant inventories were conducted on the study plots and surrounding plant communities, involving enumeration of the plant species and estimation of their ground covers. Physico-chemical characteristics of the soils of the study plots were determined each time an inventory was conducted. Data were analysed using R statistical packages vegan and lme4.

Results: Mine tailings and pyrite soils had extremely low pH, poor nutritional status, low organic matter content and elevated concentrations of heavy metals as compared to the unpolluted soils. Before treatment, species richness, diversity and plant cover were extremely low with most of the ground being completely bare. Treatment of the soils significantly improved the physico-chemical characteristics starting a

plant succession that increased the number of species from 18 to 215 different species, belonging to 131 genera and 34 families. Plots of the leguminous tree species Senna siamea and Leucaena leucocephala had significantly more species than the non-leguminous Eucalyptus grandis. Early changes in species composition of the restoration plots were minimal. Correspondence analysis (CA) revealed significant differences in species composition between the experimental plots and the plots at the unpolluted site.

Conclusion: Application of amendment material that significantly alters the physico-chemical characteristics of mine wastes is pre-requisite for their phytostabilisation. Leguminous tree species Senna siamea and Leucaena leucocephala have a higher potential for phytostabilisation of pyrite and copper tailings as their growth led to the establishment of understory plant communities with higher species diversity and cover. 

Keywords
compost, correspondence analysis, dynamics, limestone, phytostabilisation, pyrite, restoration, tailings
National Category
Ecology
Identifiers
urn:nbn:se:uu:diva-231534 (URN)10.7243/2050-1323-3-4 (DOI)
Funder
Sida - Swedish International Development Cooperation Agency
Available from: 2014-09-08 Created: 2014-09-08 Last updated: 2014-09-09Bibliographically approved
Backéus, I. (2014). Sankta Helena: en hotad endemisk flora. 1. Den ursprungliga floran och vegetationen och den historiska utvecklingen. Svensk Botanisk Tidskrift, 108(3-4), 206-218
Open this publication in new window or tab >>Sankta Helena: en hotad endemisk flora. 1. Den ursprungliga floran och vegetationen och den historiska utvecklingen
2014 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 108, no 3-4, p. 206-218Article in journal (Other academic) Published
Abstract [en]

An overview of the endemic flora and the original vegetation of Saint Helena is given.

National Category
Botany
Identifiers
urn:nbn:se:uu:diva-226203 (URN)
Available from: 2014-06-13 Created: 2014-06-13 Last updated: 2017-12-05Bibliographically approved
Backéus, I. (2014). Sankta Helena: en hotad endemisk flora. 2. situationen i dag. Svensk Botanisk Tidskrift, 108(5), 232-244
Open this publication in new window or tab >>Sankta Helena: en hotad endemisk flora. 2. situationen i dag
2014 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 108, no 5, p. 232-244Article in journal (Refereed) Published
Abstract [en]

The present-day situation for the endemic flora of Saint Helena is described.

National Category
Botany
Identifiers
urn:nbn:se:uu:diva-235108 (URN)
Available from: 2014-10-28 Created: 2014-10-28 Last updated: 2017-12-05Bibliographically approved
Backéus, I. (2013). Gunnar Björkman och hans expedition till Lule lappmark 1924: Gunnar Björkman’s expedition to Swedish Lapland in 1924. Svensk Botanisk Tidskrift, 107(6), 354-358
Open this publication in new window or tab >>Gunnar Björkman och hans expedition till Lule lappmark 1924: Gunnar Björkman’s expedition to Swedish Lapland in 1924
2013 (Swedish)In: Svensk Botanisk Tidskrift, ISSN 0039-646X, Vol. 107, no 6, p. 354-358Article in journal (Other academic) Published
Abstract [en]

Drawings by Torsten Höjer from Gunnar Björkman's botanical expedition to Swedish Lapland in 1924 are presented with some biographical notes on Björkman. The paleontologist  Birger Bohlin also participated.

National Category
Botany
Identifiers
urn:nbn:se:uu:diva-213038 (URN)
Available from: 2013-12-17 Created: 2013-12-17 Last updated: 2017-12-06Bibliographically approved
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