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Fischökologische Leitbilder fünf ausgewählter Salzkammergutseen |
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| Authors: | Hubert Gassner Josef Wanzenbck |
| Institution: | Institut für Limnologie der österreichischen Akademie der Wissenschaften, Mondsee, Austria |
| Abstract: | Ecological base line states for fish communities are necessary for the evaluation of ecological integrity. In Austria the fish communities of all the larger lakes are strongly influenced by human activities, like commercial fisheries, fish stocking, eutrophication or shore line degradation, and therefore these baseline states can not be developed by comparison with a natural, undisturbed lake. We developed ecological baseline states for the fish communities of the lakes Hallstättersee, Traunsee, Mondsee, Irrsee and Wallersee by reconstructing the native fish communities of these lakes from historical documents (from between 1500 to 1940). Then we classified the potential fish species of these lakes according to their ecological requirements. Finally we developed the base line states with 16 different ecological factors similar to the factors used for the ecological integrity assessment procedure for streams. The process of reconstructing the fish communities and some advantages and disadvantages of the base line states for fish communities are discussed. |
| Keywords: | Base line states reconstructed fish communities ecological integrity lakes |
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