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Use of littoral algae to detect zones of nutrient enrichment in the littoral of an oligotrophic lake

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The potential for using benthic algae to identify areas around the lake littoral that are potentially influ- enced by diffuse inputs of nutrients is considered through research based around Ennerdale Water in NW England. This is an oligotrophic lake with a highly sensitive population of Margalifera margalifera in the outflow river. Water chemistry, algal biomass, diatoms and macroalgae were studied at six points around the perimeter of the lake. Evidence of higher concentrations of dissolved nutrients along with alterations in the diatom and, to a lesser extent, macroalgae assemblages was found in the north-west corner of the lake. Algal biomass gave a more ambiguous signal, with local variations in biomass masked by stronger seasonal signals that determined the quantity of algae present at a site on any given date. These results demonstrate the potential for using benthic algae to generate more focussed data on the condition of a lake than is possible with the whole-lake assessments on which classifications are based.
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Keywords: ALGAE; DIATOMS; DIFFUSE POLLUTION; ECOLOGICAL ASSESSMENT; LAKES; PHYTOBENTHOS; WATER FRAMEWORK DIRECTIVE

Document Type: Research Article

Publication date: 01 July 2018

This article was made available online on 16 April 2018 as a Fast Track article with title: "Use of littoral algae to detect zones of nutrient enrichment in the littoral of an oligotrophic lake".

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  • Fundamental and Applied Limnology is an international journal for freshwater research in the widest sense, including problems of marine biology and brackish water research. Papers dealing with ecological topics are especially welcome in association with experimental or physiological studies. All papers published in this journal are subject to peer review.

    Archiv für Hydrobiologie, now Fundamental and Applied Limnology has been published continuously since 1906.

    Volumes prior to vol. 168 were published under the previous title Archiv für Hydrobiologie.
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