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Hydrobiological Journal
SJR: 0.227 SNIP: 0.575 CiteScore™: 0.24

ISSN Imprimir: 0018-8166
ISSN En Línea: 1943-5991

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Hydrobiological Journal

DOI: 10.1615/HydrobJ.v55.i1.60
pages 58-65

Chlorophyll α Content in the Near-Bottom Layer of Water of the Rybinsk Reservoir (the Upper Reaches of the Volga River, Russian Federation)

L. Ye. Sigareva
Institute of Biology of Inland Waters Russian Academy of Sciences, Borok, Russia
N. M. Mineyeva
Institute of Biology of Inland Waters Russian Academy of Sciences Borok, Russian Federation
N. A. Timofeyeva
Institute of Biology of Inland Waters Russian Academy of Sciences, Borok, Russia


Long-term data on the spatial and temporal dynamics of chlorophyll α (Chl α) content in the near-bottom layer of water of the Rybinsk Reservoir obtained using the fluorometric method are given in the paper. Relationship between the content of Chl α in the near-bottom layer of water and that in the photosynthesizing zone and bottom sediments was analyzed. It has been shown that in terms of the average and prevailing values, the photosynthesizing zone is assigned to eutrophic category, whereas the near-bottom zone - to mesotrophic one. The obtained results supplement the present view on the processes of production in large water bodies. They suggest that the newly formed organic matter is of considerable importance in the formation of productivity of various biotopes. It has been shown that even under dynamic conditions the pattern of ecosystem functioning remains almost unchanged. Some specific features are observed in the years significantly differing in their hydrometeorological conditions.

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