Structural and Functional Characteristics of Zoobenthos in the Lakes Located in Natural and Urbanistic Landscapes in Northwest Region of Russia

Структурно-функциональные характеристики зообентоса двух озер с разным уровнем трофии и степени антропогенного воздействия на их экосистемы были исследованы весной, летом и осенью 2013 и 2014 гг. Отмечены особенности видового состава, степени доминирования, трофической структуры, продукции сообщества зообентоса и его участия в деструкции органических веществ в озерах. Сезонная динамика количественных характеристик зообентоса озер с разной антропогенной нагрузкой демонстрировала несинхронность отклика сообщества на действие природных факторовStructural and functional characteristics of zoobenthos in two lakes with different trophic status and the level of human impact were investigated in spring, summer and autumn 2013 and 2014. Species composition, degree of dominance, trophic structure, production and a role in the decomposition of organic matter were studied in zoobenthos of the two lakes. Seasonal dynamics of the quantitative characteristics of zoobenthos in lakes with varying anthropogenic impact showed an asynchronous response of the communities on dynamics of natural factor

Structural and Functional Characteristics of Zoobenthos in the Lakes Located in Natural and Urbanistic Landscapes in Northwest Region of Russia

Структурно-функциональные характеристики зообентоса двух озер с разным уровнем трофии и степени антропогенного воздействия на их экосистемы были исследованы весной, летом и осенью 2013 и 2014 гг. Отмечены особенности видового состава, степени доминирования, трофической структуры, продукции сообщества зообентоса и его участия в деструкции органических веществ в озерах. Сезонная динамика количественных характеристик зообентоса озер с разной антропогенной нагрузкой демонстрировала несинхронность отклика сообщества на действие природных факторовStructural and functional characteristics of zoobenthos in two lakes with different trophic status and the level of human impact were investigated in spring, summer and autumn 2013 and 2014. Species composition, degree of dominance, trophic structure, production and a role in the decomposition of organic matter were studied in zoobenthos of the two lakes. Seasonal dynamics of the quantitative characteristics of zoobenthos in lakes with varying anthropogenic impact showed an asynchronous response of the communities on dynamics of natural factor

The role of salinity as an environmental filtering factor in the determination of the Diptera taxonomic composition in the Crimean waters

Salinity is one of the most important factors in aquatic ecosystems, but its filtering role in the Diptera community species composition is still poorly studied. This issue was studied in the diverse Crimean water bodies. A total of 425 samples were collected from freshwater to hypersaline waters. In 73% of the 425 samples examined, representatives of Diptera were found; their larvae and pupae belonged to seven families. Сhironomid species composition was analyzed in 47 samples. The most common were Chironomidae, which were in 94% of samples with Diptera, Ceratopoganidae were in 8% of samples, Ephydridae were in 5% of samples, Simuliidae were in 4% of samples, Culicidae and Chaoboridae were in 4% of samples, and Syrphidae was in only one sample. A total of 14 Chironomidae genera and 21 species and forms were found; 9 of them are new for Crimea. Reduction of the dominance variants in the community, as well as the number of chironomid species, with increasing salinity may indicate an increase in the filtering role of salinity in the Diptera community species composition that is still poorly studied

The role of salinity as an environmental filtering factor in the determination of the Diptera taxonomic composition in the Crimean waters

Salinity is one of the most important factors in aquatic ecosystems, but its filtering role in the Diptera community species composition is still poorly studied. This issue was studied in the diverse Crimean water bodies. A total of 425 samples were collected from freshwater to hypersaline waters. In 73% of the 425 samples examined, representatives of Diptera were found; their larvae and pupae belonged to seven families. Сhironomid species composition was analyzed in 47 samples. The most common were Chironomidae, which were in 94% of samples with Diptera, Ceratopoganidae were in 8% of samples, Ephydridae were in 5% of samples, Simuliidae were in 4% of samples, Culicidae and Chaoboridae were in 4% of samples, and Syrphidae was in only one sample. A total of 14 Chironomidae genera and 21 species and forms were found; 9 of them are new for Crimea. Reduction of the dominance variants in the community, as well as the number of chironomid species, with increasing salinity may indicate an increase in the filtering role of salinity in the Diptera community species composition that is still poorly studied