MODERN GEOECOLOGICAL TRANSFORMATIONS IN THE KERCH STRAIT ECOSYSTEM
- Authors: Fashchuk D.Y.1, Terent’ev A.S.2, Koval’chuk S.K.3, Kucheruk N.V.4
-
Affiliations:
- Institute of Geography, Russian Academy of Sciences
- Southern Research Institute of Marine Fisheries and Oceanography
- Republic of Crimea Landslide Prevention Authority
- Shirshov Institute of Oceanology, Russian Academy of Sciences
- Issue: Vol 89, No 1 (2019)
- Pages: 72-77
- Section: Environmental Problems
- URL: https://journals.rcsi.science/1019-3316/article/view/179512
- DOI: https://doi.org/10.1134/S1019331619010015
- ID: 179512
Cite item
Abstract
The distribution, structure, and dynamics of the bottom communities of the Kerch Strait macrozoobenthos were studied based on an analysis of literary sources in 1934 and 1955, archival data of hydrobiological field studies by the Southern Research Institute of Marine Fisheries and Oceanography (YugNIRO, Kerch) in 1986 and 1989, and the results of a joint Russian–Ukrainian benthic survey of the Kerch Strait (47 stations) carried out by the Institute of Geography, Russian Academy of Sciences (RAS), and YugNIRO in summer 2010. It has been revealed that over the past 75 years, populations of bivalve filter-feeding mollusks (sestonophages) have degraded in the strait’s ecosystem, whereas populations of polychaetes (detritovorous collectors) preferring silty beds have increased. Species of benthic animals and areas of the strait in which maximum changes have occurred have been identified. After analyzing the dynamics of the structure of bottom sediments in the strait based on the archival YugNIRO data and the results of a diving survey by IG RAS in 2008 (49 dives), it was proved that one reason for the established transformations was silt deposition in a significant part of the floor of the strait as a result of previous (burial of dredged sediments, 1960–1990 ) and modern (construction of the Tuzla dam, 2003) economic activity. Since the character of the recorded transformations prevents the assumption of these reasons as unique, the authors consider various hypotheses explaining the mechanism for these changes. A conclusion is drawn about the need for further research on the geoecological dynamics of the Kerch Strait ecosystem, especially today, after construction of the Crimean Bridge.
About the authors
D. Ya. Fashchuk
Institute of Geography, Russian Academy of Sciences
Author for correspondence.
Email: fashchuk@mail.ru
Russian Federation, Moscow
A. S. Terent’ev
Southern Research Institute of Marine Fisheries and Oceanography
Author for correspondence.
Email: iskander65@bk.ru
Russian Federation, Kerch
S. K. Koval’chuk
Republic of Crimea Landslide Prevention Authority
Author for correspondence.
Email: sergey.kovalchuk.1951@mail.ru
Russian Federation, Yalta
N. V. Kucheruk
Shirshov Institute of Oceanology, Russian Academy of Sciences
Email: sergey.kovalchuk.1951@mail.ru
Russian Federation, Moscow