Eutrophication of Lake Tasaul, Romania—proposals for rehabilitation |
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Authors: | Mihaela Laurenta Alexandrov and Jürg Bloesch |
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Institution: | (1) National Institute for Marine Research and Development, ‘Grigore Antipa’, Bd. Mamaia 300, 900581 Constanta, Romania;(2) Eawag, Swiss Federal Institute of Aquatic Science and Technology, ?berlandstrasse 133, CH-8600 D?bendorf, Switzerland |
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Abstract: | Lake Tasaul on the Black Sea coast is highly eutrophic, but not strongly contaminated (heavy metals, PAHs, and organochlorine
pesticides). Cyanophytes dominate phytoplankton by 67–94% and form frequent algal blooms. High primary production (up to 270 mg
Cass/m2.h) and algal biomass (maximum chlorophyll a concentration 417 μg/l) may be controlled by light, as Secchi depth is often below 1 m. The main tributary, Casimcea River,
provides high quantities of suspended matter and about 3 tons TP/year and 660 tons TN/year. Based on chemical and biological
analysis as well as fishery investigations, we provide recommendations for Lake Tasaul rehabilitation. |
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