Document Detail


Total and opportunistic algal cover in relation to environmental variables.
MedLine Citation:
PMID:  16997327     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Based on a large data set from the national Danish monitoring program, spatial and temporal variability in total algal cover and in the fraction of opportunistic macroalgae was analysed in relation to environmental variables. Variations in water clarity and salinity combined with information on geographical location of sampling areas were found to explain almost 80% of the large-scale variation in algal cover between areas. As water clarity was largely regulated by concentrations of total-nitrogen (TN), and TN-concentrations by TN-input from land, total algal cover at given water depths was partly related to TN-input from land. The fraction of opportunistic algae responded predominantly to differences in salinity, the highest fractions being found in the most brackish areas. Temporal variability in algal cover and fraction of opportunists over the 14-year investigation period was much smaller than the variability between areas and could not be predicted from variations in environmental variables. In order for macroalgal cover to become a more sensitive indicator of water quality it would be necessary to either increase the sensitivity of the method or identify and include supplementary regulating factors in the model.
Authors:
Dorte Krause-Jensen; Jacob Carstensen; Karsten Dahl
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-09-25
Journal Detail:
Title:  Marine pollution bulletin     Volume:  55     ISSN:  0025-326X     ISO Abbreviation:  Mar. Pollut. Bull.     Publication Date:  2007  
Date Detail:
Created Date:  2006-11-27     Completed Date:  2007-04-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0260231     Medline TA:  Mar Pollut Bull     Country:  England    
Other Details:
Languages:  eng     Pagination:  114-25     Citation Subset:  IM    
Affiliation:
National Environmental Research Institute, Department of Marine Ecology, Vejlsøvej 25, 8600 Silkeborg, Denmark. dkj@dmu.dk
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MeSH Terms
Descriptor/Qualifier:
Algae / growth & development*
Climate
Denmark
Environment*
Environmental Monitoring / methods,  statistics & numerical data*
Geography
Models, Theoretical
Nitrogen / analysis
North Sea
Population Density
Seawater / chemistry*
Chemical
Reg. No./Substance:
7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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