Water temperature of the littoral zone during the domination of the blue-green algae Planktothrix agardhii and Limnothrix redeckei in the composition of phytoplankton in the polytrophic lake Jeziorak Maly
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Studies were carried out on net phytoplankton of an urban Lake Jeziorak Maly, Mazurian Lakeland. Samples collected in 1996 showed domination of blue-green algae(67% of the total phytoplankton number). Limnothrix redeckei and Plankto-thrix agardhii were particularly abundant. The measurement of the water temperature during the mass occurrence of these species revealed, that Limnothrix redeckei dominated at 180C and Planktothrix agardhii at 200C.
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E. Zebek, Department of Environment Protection, The Higher Pedagogical School of Olsztyn, Zolnierska 14 c, 10 - 561 Olsztyn, Poland