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Dead midges reveal living conditions of fish
Date:4/4/2011

we infer whether fish has disappeared, we can also see how different fish species have been affected. Roach, for example, are more sensitive to acidification than perch, and we have been able to show whether lakes historically have contained cyprinid fish or not. Remains of acid sensitive zooplankton can simultaneously be used to show trends of progressive acidification in lakes.

Providing a basis for restoration

As the method reveals how the fish community in a lake has changed over the last few centuries, it can also be used to turn the clock back as a way of deciding how biological restoration of an acidified lake should proceed. The historical perspective of the method also makes it possible to analyse natural variations in lake ecosystems.

Palm and his colleagues have therefore carried out their studies in the counties of Vstra Gtaland and Bohusln, Sweden, focusing in primarily on the Lake Grdssjn area in Ucklum, which has been a centre of Swedish acidification research for many decades.


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Contact: Fredrik Palm
fredrik.palm@zool.gu.se
46-317-863-668
University of Gothenburg
Source:Eurekalert  

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