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International Journal on Algae
SJR: 0.216 SNIP: 0.322 CiteScore™: 0.4

ISSN Imprimir: 1521-9429
ISSN En Línea: 1940-4328

International Journal on Algae

DOI: 10.1615/InterJAlgae.v8.i3.40
pages 243-254

The invasion of Cyclotella comensis Grun. (Bacillariophyta) in the Lake Naroch (Belarus) ecosystem during de-eutrophication

T. M. Mikheyeva
Belarusian State University, 4, Nezavisimosti Av., 220030 Minsk, Belarus
S. I. Genkal
I.D. Papanin Institute for Biology of Inland Waters of RAS, Settle Borok, Nekouz District, Yaroslavl Region 152742, Russia

SINOPSIS

The Lake Naroch ecosystem (Lakes Naroch, Myastro, and Batorino) have passed through different evolutionary periods of their trophic state: 1) the period with insignificant antropogenic press, 2) the period of antropogenic eutrophication, and 3) the period of de-eutrophication, which was accompanied by structural changes and an instable state of phytoplankton communities. During de-eutrophication, the invasion of the centric diatom Cyclotella comensis Grun. in the lakes was revealed; recently, it was recorded in Belarus only as a fossil. Data on seasonal dynamics and inter-year fluctuations of species number for 12 years of observation (1992−2003) are given. An electron microscopy study of morphological variability of C. comensis from Lake Batorino is presented.


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