Long-term changes in the benthic communities of the Sea of Azov related to the sedimentation and hydrological regime

• Published in: Oceanology (Washington. 1965) Vol. 48; no. 3; pp. 390 - 400
• Main Authors: Matishov, G. G., Shokhin, I. V., Nabozhenko, M. V., Pol’shin, V. V.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01.06.2008; Springer Nature B.V
• Subjects: Benthic communities; Desalination; Earth and Environmental Science; Earth Sciences; Hydrologic regime; Hydrology; Marine; Marine Biology; Marine ecology; Oceanography; Oxygen depletion; River discharge; River flow; Rivers; Salinity; Sedimentation & deposition; Australia, Queensland, Don R; MED, Azov Sea; Benthic Fauna; Murmansk Marine Biological Institute; Concentric Pattern; Bottom Sediment; Benthic Community
• ISSN: 0001-4370; 1531-8508
• DOI: 10.1134/S0001437008030119

The following periods reflected in the composition and distribution of benthic communities are distinguished in the development of the Sea of Azov during the last 80 years: (1) prior to the regulation of the Don River discharge, (2) after its regulation, (3) stabilization of the Don River hydrological regime, and (4) desalination of the sea. The distribution of benthic communities in the Sea of Azov is characterized by concentric patterns, which are distorted due to the changes in the hydrological and oxygen regimes after oxygen depletion. The basic factors that influence the distribution of macrozoobenthic communities are the aeration regime of the sea and the character of the sediment accumulation. The steady distribution of benthic communities composed largely of euryhaline species adapted to the conditions of an unstable salinity in the Sea of Azov shows no correlation with the salinity fluctuations from 9 to 14‰ during the 80-year-long period.