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Title:	Changes of species diversity of phytoplankton and physicochemical water parameters in annual cycles in the urban Lake Jeziorak Mały
Authors:	Zębek Elżbieta
Abstract:	The study was conducted on net phytoplankton in the littoral zone of the urban Lake Jeziorak Mały (Mazurian Lakeland) in annual cycles during the 1998-2003 period. The relation between the species diversity (Shannon-Weaver index) of blue-greens, diatoms, and green algae and their abundance and water temperature and orthophosphate concentration were analyzed in annual cycles. The lowest index of blue-greens was noted in July when abundance was at the maximum. The highest numbers of diatoms were recorded in October at low species diversity. However, the highest index of green algae species diversity was noted in September at the maximum abundance. Similar tendencies were noted for blue-greens and green algae. Increased water temperatures were followed by a decrease in the species diversity index while an increase in orthophosphate concentration was followed by an increase in this index. A slight increase in the diatom species diversity index was noted at an increased water temperature and a decreased orthophosphate concentration.
DOI:
Type of paper:	Original research paper
Pages:	49 to 55
Cytation:	Zębek E., 2007, Changes of species diversity of phytoplankton and physicochemical water parameters in annual cycles in the urban Lake Jeziorak Mały, Ocean. Hydrob. Studies, 36(Supl.1): 49-55
Keywords:	lake, net phytoplankton, species diversity, annual cycle, temperature, orthophosphates
Year:	2007
Download:	Download file "359.pdf"