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Modeling the recovery of anthropogenically acidified mountain waters
 Hardekopf, David
Thesis Summary The five chapters of this thesis consist of manuscripts published in peer-reviewed journals, focused on the effects of anthropogenic acidification on freshwater ecosystems in the Czech Republic and Slovakia, and an attempt to understand the processes and time-frame of recovery using modeling. In the Tatra Mountains in Slovakia and the Bohemian Forest in the Czech Republic, high mountain lakes have been the focus of long-term studies on both the biological and chemical impacts of acidification. The effects of anthropogenic acidification on headwater streams in the mountains and highlands of the Czech Republic have been recognized more recently, and the resulting changes to the biological community and trends in chemical changes are less well- known. Dynamic modeling, combined with the incorporation of scenarios of possible climate change, is used to investigate the present status and future trends in recovery of these ecosystems after recent reductions in atmospheric acid deposition. The first chapter is a paper on the macroinvertebrate biota in atmospherically acidified streams in the Czech Republic. This paper shows the effect of low pH on the taxonomic composition in these streams. The second chapter is focused on the current (2004) chemical composition of 91 lakes in the Tatra Mountains,...
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