A. A. Prokin, D. G. Seleznev, Cu Nguyen Dinh, Tran Van Tien, A. I. Tsvetkov
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引用次数: 0
Abstract
In 2019, due to changes in the hydrograph caused by the construction of dams upstream, the Mekong River Basin experienced a decline in delta water level. In this year, macrozoobenthos communities of the Bassac (Hau) and Mekong (Tien) Rivers in Vietnam were studied in April and December. The total species richness, abundance, and biomass of studied macrozoobenthos assemblages did not depend on any environmental factors. The β-diversity estimation for species abundance shows the existence of three groups of species assemblages, related mostly to salinity. Most assemblages were characterized by low species richness (3.2 on average) and similarity (general mean Bray-Curtis = 8%), a large number of species, which were dominants in certain assemblages (31–42% of the total list), with the absence of a relationship with hydrological zones or seasons. This allowed us to consider these groupings as “pseudocommunities”, randomly formed in the extreme conditions of a sharp change in the hydrological regime of the Mekong River Delta in 2019.
期刊介绍：
Inland Water Biology publishes thematic reviews and original papers devoted to flora and fauna in waterbodies, biodiversity of hydrobionts, biology, morphology, systematics, ecology, ethology, ecological physiology and biochemistry of aquatic organisms, patterns of biological cycle, structure and functioning of aquatic ecosystems, anthropogenic and uncontrolled natural impacts on aquatic organisms and ecosystems, invasion of nonindigenous species into ecosystems and their ecology, methods of hydrobiological and ichthyological studies.
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