Trophic changes,without changes in the external nutrient loading |
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| Authors: | Lennart Henrikson Hans G Nyman Hans G Oscarson Jan A E Stenson |
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| Institution: | (1) Department of zoology, University of Göteborg, Fack, S-400 33, Göteborg 33, Sweden |
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| Abstract: | The impact of the fish population on trophic properties of lake water, was experimentally studied in an oligotrophic Swedish forest lake. Biotic changes following fish removal resulted in a development in oligotrophic direction as shown by the drop in limnetic primary production, pH, total phosphorus, total nitrogen and the increased transparency. |
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| Keywords: | predation grazing oligotrophication fish zooplankton phytoplankton lake management |
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