Seasonal dynamics of phytoplankton in a lagoon-type lake Izmenchivoye (Southeast Sakhalin)

Seasonal dynamics of phytoplankton in a lagoon-type lake Izmenchivoye (Southeast Sakhalin) The seasonal changes in taxonomic structure, dynamics of number, and biomass of phytoplankton in the Izmenchivoye lagoon lake (southeast Sakhalin) were studied. In all, 266 species and intraspecies taxa of microalgae were revealed. The greatest species diversity (according to the Shannon index) was observed in May, August and October (H = 2.76–2.89), the least (H = 0.5–0.86), in April and January of 2006. The monthly average number varied from 997 up to 84 282 cells/l, and biomass from 18.98 up to 878.62 mg/m3. The average annual number of phytoplankton and its biomass were 32 650 cells/l and biomass 172.13 mg/m3 respectively. The maximum number was registered in August, 2005, and maximum biomass was recorded in January, 2006. Winter, spring and summer peaks of number coinciding with those of biomass were registered. For the first time, winter bloom of phytoplankton was registered in inland waters of the Sakhalin Island. In the winter and spring the basic input to formation of the parameters was composed of diatoms; in summer and autumn it was composed of by flagellates (dinophyta and cryptophyta). Russian Journal of Marine Biology Springer Journals

Seasonal dynamics of phytoplankton in a lagoon-type lake Izmenchivoye (Southeast Sakhalin)

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SP MAIK Nauka/Interperiodica
Copyright © 2010 by Pleiades Publishing, Ltd.
Life Sciences; Freshwater & Marine Ecology
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