Articles

Title:	Annual succesion patterns of blue-green algae as related to physico-chemical water parameters in the urban Lake Jeziorak Mały in the 1998-2003 period
Authors:	Zębek Elżbieta
Abstract:	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 19ºC, 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.
DOI:
Type of paper:	Original research paper
Pages:	33 to 46
Cytation:	Zębek E., 2005, Annual succesion patterns of blue-green algae as related to physico-chemical water parameters in the urban Lake Jeziorak Mały in the 1998-2003 period, Ocean. Hydrob. Studies, 34(4): 33-46
Keywords:	lake, blue-green algae, annual cycle, water temperature, orthophosphates
Year:	2005
Category:
Download:	Download file "125.pdf"