The Climate Warming Influence on the Shuya River Winter Runoff and the Consequences for The Zoobenthos of the Onego Lake
https://doi.org/10.31857/S0869607122010086
Abstract
The article is devoted to the analysis of climatic changes in the catchment area of the Shuya River which is the second largest tributary of the Onego Lake, and the reaction of the deepwater benthos of the Petrozavodsk Bay to the winter river runoff increase in recent decades. It is shown that during 1960–2019 the average annual air temperature and the number of thaws increased in the catchment area of the Shuya River. The soil freezing decrease is observed in connection with climate warming in the past 10 years. Since the winter of 2008– 2009 the winter runoff of the Shuya River has increased significantly in comparison with the runoff of the period 1961–1990. The 3–4-fold decrease in the biomass of deepwater benthos (relict crustaceans and oligochaetes) is found in the deepest part of the Petrozavodsk Bay simultaneously with the changes in the catchment area of the Shuya River in the last 10– 15 years. It is suggested that the reasons of benthos biomass decrease are associated with an increase in inflow of iron with river waters and accumulation of iron at the bottom of the Petrozavodsk Bay due to climate warming.
About the Authors
L. E. Nazarova
Northern Water Problems Institute, Karelian Research Centre RAS
Russian Federation
Russian Federation
Petrozavodsk
K. V. Isakova
Northern Water Problems Institute, Karelian Research Centre RAS
Russian Federation
Russian Federation
Petrozavodsk
N. M. Kalinkina
Northern Water Problems Institute, Karelian Research Centre RAS
Russian Federation
Russian Federation
Petrozavodsk
A. F. Balaganskii
Northern Water Problems Institute, Karelian Research Centre RAS
Russian Federation
Russian Federation
Petrozavodsk
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Review
For citations:
Nazarova L.E., Isakova K.V., Kalinkina N.M., Balaganskii A.F. The Climate Warming Influence on the Shuya River Winter Runoff and the Consequences for The Zoobenthos of the Onego Lake. Proceedings of the Russian Geographical Society. 2022;154(1):28-36. (In Russ.) https://doi.org/10.31857/S0869607122010086
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