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Taxonomic composition and salinity tolerance of macrozoobenthos in small rivers of the southern arid zone of the East European Plain
Golovatyuk, L.V.; Nazarova, L.B.; Kalioujnaia, I.J.; Grekov, I.M. (2023). Taxonomic composition and salinity tolerance of macrozoobenthos in small rivers of the southern arid zone of the East European Plain. Biology-Basel 12(9): 1271. https://dx.doi.org/10.3390/biology12091271
In: Biology-Basel. MDPI AG: Basel. ISSN 2079-7737; e-ISSN 2079-7737
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| Trefwoord |
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| Author keywords |
benthic communities; species composition; species distribution; salinity resistance; salinity gradient; small rivers; arid region; East European Plain; the Volga River; the Lake Elton |
| Auteurs | | Top |
- Golovatyuk, L.V.
- Nazarova, L.B.
- Kalioujnaia, I.J.
- Grekov, I.M.
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| Abstract |
Climate-related salinization of inland waters is observed in many regions of the world as a major environmental problem affecting natural processes in aquatic ecosystems. In order to better predict and control these changes, it is important to study the responses of aquatic fauna to increasing salinity. Macrozoobenthic fauna, which includes mollusks, small crustaceans, and insect larvae, constitutes the main food base for fish and water birds. Due to their relatively short life cycles, large species diversity, and high abundance, macrozoobenthos are the best indicators of changing water salinity. To determine the species richness, distribution, and salinity tolerance of macrozoobenthos, we investigated 17 small rivers with different water salinity in the southern arid region of the East European Plain. The study shows that the species richness gradually decreases with an increase in water salinity in the rivers. In freshwater rivers, the macrozoobenthos fauna includes more than 100 species, whereas, in hypersaline rivers with salinity comparable to seawater, only 10 species were found. A total of 5 of the 156 invertebrate species can be used as indicators of water salinization in rivers of the arid regions of Europe. |
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