ORIGINAL RESEARCH
Four-Year Study on Phytoplankton Biodiversity
in a Small Hypertrophic Lake Affected by Water
Blooms of Toxigenic Cyanobacteria
Magdalena Toporowska, Barbara Pawlik-Skowrońska
Department of Hydrobiology, University of Life Sciences in Lublin,
Dobrzańskiego 37, 20-262 Lublin, Poland
Dobrzańskiego 37, 20-262 Lublin, Poland
Pol. J. Environ. Stud. 2014;23(2):491-499
KEYWORDS
ABSTRACT
In a shallow hypertrophic lake, species richness of phytoplankton was very high (174-223 taxa, yearly)
but values of Shannon-Weaver index were very low (0.04-1.38). Perennial blooms (2.1×107-11.6×107 ind.·L-1)
of microcystin-producing (up to 123.6 μg intracellular MCs·L-1 in 2006, and 43.8-57.3 μg·L-1 in 2008-09)
cyanobacterium Planktothrix agardhii and the time of their appearance affected phytoplankton species richness
(34-66% loss) and diversity (4-9 fold decrease in the values of Shannon-Weaver index). Short-term mass
development of anatoxin-a-producing cyanobacteria (Dolichospermum spp. and/or Cuspidothrix
issatschenkoi) did not influence algal biodiversity.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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