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Assessment of Ecological Value of Coastal Areas Using Morphometry and Secchi Depth: A Case Study with Data from the Swedish Coast
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. (Miljöanalys)
2010 (English)In: Journal of Coastal Research, ISSN 0749-0208, E-ISSN 1551-5036, Vol. 26, no 3, 429-435 p.Article in journal (Refereed) Published
Abstract [en]

Coastal morphometry has importance for water exchange and affects primary production potential, in that the bathymetric shape of a coastal area determines how much of the bottom area is reached by sunlight and hence is available for benthic primary production. In this paper, morphometric production potential, here defined as the bottom area above the Secchi depth, was assessed with the use of geographical information systems, morphometric data, and Secchi depth data, exemplified with data from the whole Swedish coast. The spatial distribution of ecologically important areas with high morphometric production potential was quite even along the Swedish coastline, but some regional differences were found. A linear relationship was found between the Secchi depth and the bottom area above the Secchi depth for the Swedish coast. An equation for calculation of the bottom area below/above a certain depth in lakes was used to calculate the area above the Secchi depth for 541 coastal areas, and the results were compared with the corresponding area values extracted from hypsographic data. This test yielded good correlation (r2 = 0.87), and the equation was found to be useful also in coastal areas (e.g., when detailed hypsographs are not available).

Place, publisher, year, edition, pages
2010. Vol. 26, no 3, 429-435 p.
Keyword [en]
Benthic production potential, bathymetric shape, form factor, GIS, Sweden
National Category
Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
URN: urn:nbn:se:uu:diva-136415DOI: 10.2112/08-1136.1ISI: 000277947000005OAI: oai:DiVA.org:uu-136415DiVA: diva2:376839
Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Form and Function of Coastal Areas
Open this publication in new window or tab >>Form and Function of Coastal Areas
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Coastal waters have high biological productivity and provide goods and services with a high monetary value. Coasts are used by many different stakeholders and are often densely populated. These factors put coastal ecosystems under heavy environmental pressure and place high demands on politicians and coastal managers, who need suitable tools to facilitate decision-making. Geographic information systems and predictive mass balance models are two such tools, and the form of coastal areas (morphometry) is an important component of both tools in coastal management.

In this thesis it was shown that the form and function of coastal areas are interrelated in a number of ways. Morphometric parameters can be used to identify coastal areas that are more sensitive to pollution, or that potentially have higher ecological value; and morphometric analysis is an essential part of mass balance modeling. New ways of using morphometry for estimation of benthic production potential were presented and tested. It was shown that there are great differences in benthic production potential among Swedish coastal areas and regions. Different morphometric descriptors of openness were developed and tested; these can be used in habitat mapping or for prediction of sediment bottom types. Significant correlation was found between the morphometric properties of coastal areas, the proportion of accumulation bottom areas and the critical depth. Statistical models for prediction of accumulation bottom areas and critical depth were also obtained using multiple regression. Large differences were found in empirical values of bottom dynamic conditions from two different sources. Algorithms from a well tested mass balance model were adapted for modeling salt in the Baltic Sea. This enabled calculation of water exchange between five basins on a monthly time scale, which can be of use in future modeling studies. The study included morphometric analysis for structuring the model and for calculation of input data.

 

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2011. 52 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 819
Keyword
Coastal areas, morphometry, geographic information systems, GIS, ecological value, wave exposure, sediment, bottom dynamic conditions, mass balance modeling
National Category
Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
urn:nbn:se:uu:diva-150645 (URN)978-91-554-8057-8 (ISBN)
Public defence
2011-05-20, Axel Hambergsalen, Department of Earth Sciences, Villavägen 16, Uppsala, 10:00 (Swedish)
Opponent
Supervisors
Available from: 2011-04-27 Created: 2011-04-04 Last updated: 2011-05-05

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