Annual succession patterns of blue-green algae as related to physicochemical water parameters in the urban Lake Jeziorak Mały in the 1998 - 2003 period

• Autorzy: Zębek E.
• Języki publikacji: EN

Abstrakty

EN

Studies on net phytoplankton were conducted in the urban Lake Jeziorak Mały (Mazurian Lakeland) in the 1998-2003 period. Changes in the numbers of blue-green algae were analyzed in the annual cycle with respect to water temperature and orthophosphate concentration. An increase in water temperature above 13oC was followed by an increase in the population density of bluegreens. Two abundance peaks of blue-green algae were recorded in the summers of 1998, 1999, and 2002 and one in the summers of 2000, 2001, and 2003. The coefficient of correlation between water temperature and the occurrence of blue-greens was statistically significant, but no statistically significant correlation was found between orthophosphate concentration and the abundance of blue-green algae. From May to August, under conditions of the domination of bluegreen algae (over 50% of the total phytoplankton biomass) and water temperature exceeding 19^oC, this correlation was negative and statistically significant. This suggests that over this period the blue-greens could contribute to reducing the concentration of orthophosphates in the water.

Słowa kluczowe

EN

lake Jeziorak Mały; blue-green algae; annual cycle; water temperature; orthophosphates

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2005
• Tom: Vol. 34, No.4
• Strony: 33--46
• Opis fizyczny: Bibliogr. 25 poz., tab., wykr.

Twórcy

autor

Zębek E.

• University of Warmia and Mazury, Żołnierska 14c, 10-561 Olsztyn, Poland,

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