Effect of Nutrient (N, P, C) Enrichment upon the Littoral Diatom Community of an Oligotrophic High-Mountain Lake

Nutrient-diffusing substrates were anchored in the littoral zone of Lake Piccolo Naret, Switzerland, to investigate the impact of nitrogen, phosphorus, and carbon additions-singly and in combination-on the diatom community in an oligotrophic, softwater lake. For comparison, substrates of deionized w...

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Bibliographic Details
Published in:Hydrobiologia 1993-10, Vol.269, p.453-453
Main Authors: Niederhauser, Pius, Schanz, Ferdinand
Format: Article
Language:English
Online Access:Get full text
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Summary:Nutrient-diffusing substrates were anchored in the littoral zone of Lake Piccolo Naret, Switzerland, to investigate the impact of nitrogen, phosphorus, and carbon additions-singly and in combination-on the diatom community in an oligotrophic, softwater lake. For comparison, substrates of deionized water were used. After 42 d, the control pots had less biomass of algal periphyton than those with nutrient substrates. All pots containing P had a significantly higher biomass on their surface than the controls or the pots containing C and/or N without P. The diatom communities on the pots containing N and/or P had structures similar to the epilithic community of the lakes. Differences in community structure, however, were found on the pots containing C alone or in combination with the other nutrients. The effects of the N, P, and C ratios on diatom-community structure are discussed.
ISSN:0018-8158