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ZOOPLANCTON BIODIVERSITY IN RIVER ELBE NATURAL POOLS
Abstract
Hydrobiological monitoring of selected pools (alluvial oxbow) was carried in the K?ran?-Hrb??kovy t?n? Nature Reserve (Czech Republic) between 2015 and 2017. The pools represent a residual aquatic ecosystems of original inundation floodplain of the Elbe River, before river stream regulation. The regular samplings were performed every four weeks and more than one-year cycle was covered. Water quality parameters (temperature, conductivity, pH, dissolved oxygen and transparency were measured in the field. The level of eutrophication was evaluated according to concentrations of total phosphorus and nitrogen. Zooplankton species diversity was determined in qualitative samples which were taken by plankton net with mesh size 80 ?m. The morphometry of pools (depth, open water area), surrounding landscape, management effect (angling) are evaluated in the context of the ecological status and biodiversity of this notable Nature Reserve. The evaluation the current status is a prerequisite for effective protection of pools as the examples of oldest and original types of stagnant waters in Central Europe.
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