Articles

Title:	Occurence of picocyanobacteria during a permanent desmid bloom in a small dystrophic lake
Authors:	Szeląg-Wasielewska Elżbieta
Abstract:	Changes in cell abundance and biomass of cyanobacteria and green algae were investigated in Lake Skrzynka - a small, shallow lake situated in the Wielkopolski National Park (West Poland). On all sampling dates from March to December in 2001, the most numerous green algae were desmids - Actinotaenium perminutum (G.S. West) Teiling - which caused a light green water bloom. Abundance of this species varied between 8.2×10⁴ and 2.1×10⁵ cells ml^-1, and biomass between 9.3 and 23.3 mg l^-1 with peaks in May and October. The abundance of cyanobacteria was characterized by a broader range: from 1.1×10⁵ to 2×10⁶ cells ml^-1 with a maximum in March and September, but their biomass was always small in comparison with that of A. perminutum. Within cyanobacterial populations, picoplanktonic cells (0.2-2.0 μm) dominated. Solitary spherical cells of Synechocystis were the most abundant picocyanobacteria. However, cells in colonial forms, identified mostly as members of the genus Aphanocapsa and Aphanothece, increased in some months. The negative correlation between picocyanobacteria and A. perminutum abundance was not statistically significant.
DOI:
Type of paper:	Original research paper
Pages:	237 to 246
Cytation:	Szeląg-Wasilewska E., Occurence of picocyanobacteria during a permanent desmid bloom in a small dystrophic lake, Ocean. Hydrob. Studies, 34(Supl. 3): 237-246
Keywords:	picocyanobacteria, phytoplankton, water bloom, dystrophic lake
Year:	2005
Category:
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