Abstract
Acidification has been one major environmental problem with a sharp reduction of bio-diversity as an obvious result. Liming has been used as a counter measure for a long time and is shown to significantly improve the living conditions for the lake biota with a resulting increase of bio-diversity. It is evident that basic theoretical knowledge about structural and functional relations refines our possibilities to predict the outcome of restoration measures and helps us to a better understanding of mechanisms for regulation of the structure of the pelagic community. However, one crucial question remains unanswered. Has the restored pelagic zooplankton community any resemblance with the bio-diversity it once had before acidification became a problem? We are going to use a sediment data to get information about bio-diversity in the past. By analysing remains of zooplankton and zooplanktivores in sediment cores we think it is possible to reconstruct zooplankton bio-diversity in the past to be able to judge the success of the restoration measures.
Sweden