Response of Nutrients, Plankton Communities and Macrophytes to Fish Manipulation in a Small Eutrophic Wetland Lake
✍ Scribed by István Tátrai; Kálmán Mátyás; János Korponai; Gitta Szabó; Piroska Pomogyi; János Héri
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 141 KB
- Volume
- 90
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Abstract
A food web manipulation experiment was started in 1999 in a small shallow eutrophic (Major Lake as a part of the wetland area, the Kis‐Balaton Water Protection System, KBWPS). The development of submerged macrophytes, the structure and biomass of phytoplankton and crustacean plankton responded rapidly to the removal of 60% of omnivorous cyprinid fish. An increase in transparency and a decrease in the concentrations of chlorophyll‐a, phytoplankton and phosphorus occurred simultaneously with the increased presence of submerged macrophytes, which covered 45% of the lake area compared with <10% during the premanipulation period. The success of fish manipulation demonstrated the potential of this measure as a short‐term management strategy. Our data also indicated that the clear water state was not stable in the long term. As long as phosphorus level is high, there is a risk that macrophytes will not successfully establish for longer period. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)