Published: 2014-12-31

Biotic interactions, energy pathways and trigger factors of ecosystem dynamics in shallow saline lakes

Sergei M. Golubkov , Mikhail S. Golubkov , Evgenia V. Balushkina , Larisa F. Litvinchuk
Studia Ecologiae et Bioethicae
Section: Natural Foundations of Environmental Protection
https://doi.org/10.21697/seb.2014.12.4.05

Abstract

Environmental variables, food-web dynamics, and energy pathways were investigated in ecosystems of six shallow lakes of the Crimea with salinity ranging from 24 to 340‰. There were considerable inter- and intra-annual #uctuations in the abiotic characteristics of the lakes. All the lakes had a very high concentration of total phosphorus in the water (up to 5.6 gP m-3) due to a great influence of the watershed on the lakes. A high level of primary production (up to 14.9 gC m-2 d-1) was found in the most of the lakes. The lowest primary production was found in the most saline lake with a dense population of the filtrator, Artemia urmiana. Grazing benthic energy pathways were dominant at salinities between 24 and 58‰. Greater levels of salinity led to a gradual reduction of benthic and increase of planktonic energy pathways. A fast shift from turbid to the clear-water regime was observed in one of the lakes, caused by annual variations in weather conditions.

Keywords:

saline lakes, primary production, secondary production, zooplankton, zoobenthos, energy pathways, regime shift

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Citation rules

Golubkov, S. M. ., Golubkov, M. S. ., Balushkina, E. V., & Litvinchuk, L. F. . (2014). Biotic interactions, energy pathways and trigger factors of ecosystem dynamics in shallow saline lakes. Studia Ecologiae Et Bioethicae, 12(4), 83–113. https://doi.org/10.21697/seb.2014.12.4.05

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