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Phytoplankton dominance structure and abundance as indicators of the trophic state and ecological status of Lake Kortowskie (northeast Poland) restored with selective hypolimnetic withdrawal

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Mar 2014 Poland Publisher:Walter de Gruyter GmbHJournal:Archives of Polish Fisheries, volume 22, pages 7-15 (issn: 1230-6428, eissn: 2083-6139,

Authors: Bożena Jaworska; Julita Dunalska; Dorota Górniak; Magdalena Bowszys;

doi: 10.2478/aopf-2014-0002

Phytoplankton dominance structure and abundance as indicators of the trophic state and ecological status of Lake Kortowskie (northeast Poland) restored with selective hypolimnetic withdrawal

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Abstract

Abstract The objective of the study was to identify seasonal changes in phytoplankton taxonomic structure and development rates to characterize phytoplankton communities as determinants of the trophic and ecological conditions of Lake Kortowskie in northeast Poland which has been undergoing restoration with selective hypolimnetic withdrawal. The lake was designated as being of high trophic state and bad ecological status based on intense phytoplankton growth, the strong dominance and persistent occurrence of blue-green algae, and seasonal modifications in phytoplankton taxonomic structure and assemblage growth rates. The ecological status of the lake assessed in 2011 corresponds to that determined in 1987-1990 and 1999 and indicates that eutrophication in Lake Kortowskie is progressing.

Country

Poland

Related Organizations

University of Warmia and Mazury in Olsztyn
Poland
University of Gdańsk
Poland

Keywords

ecological status assessment, taxonomic structure, biomass, phytoplankton, lake, trophy

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