Ecosystem Transformation (), 217-229

Dynamics of sedimentation processes in the Rybinsk Reservoir and their impact on bottom sediment productivity

Zakonnov V.V., Sigareva L.E., Timofeeva N.A., Zakonnova A.V. 

This work is a continuation of the study of the bottom structure in the Rybinsk Reservoir and its transformation. Based on the results of monitoring the abiotic parameters of the reservoir, the transformation of its bottom sites, the dynamics of sedimentation processes (volume, mass, accumulation rates), the concentrations of organic matter and nutrients, as well as plant pigments present in a core thickness in the years of soil surveys have been determined. The materials are presented in the form of a matrix of 20 parameters that most fully reflect the interrelations in the water-bottom sediment system. The analyzed data are close to the long-term average and correspond to actual productivity of the ecosystem bottom. Both, positive and negative correlations are observed between individual components, indicating the need to continue the detailed research. We have established the uncertain relationship between hydrological characteristics, the content of organic matter and nutrients in bottom sediments at R2 < 40, a trend towards increasing sedimentation areas at R2 > 50, and a positive trend in sediment thickness, silt volume and mass, as well as the content of chlorophyll and pheopigments at R2 > 60.

V. V. Zakonnov
Papanin Institute of Biology for Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia


L. E. Sigareva
Papanin Institute of Biology for Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia


N. A. Timofeeva
Papanin Institute of Biology for Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia


A. V. Zakonnova
Papanin Institute of Biology for Inland Waters, Russian Academy of Sciences
Borok 109, Nekouz District, Yaroslavl Oblast, 152742 Russia

zak@ibiw.ru

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