Diversity and structure of macrozoobenthic communities in the highly mineralized Khara River (territory adjacent to Lake Elton)
2011
Zinchenko, T. D. | Golovatjuk, L. V. | Vykhristjuk, L. A. | Shitikov, V. K.
The present paper deals with the results of the first study (April and August, 2006–2007) of the taxonomic composition of macrozoobenthos in the highly mineralized Khara River. The study revealed 35 species and taxa of the rank above species. Data were obtained on the spatial distribution of the species composition dynamics and on the quantitative development of the macrozoobenthic community. The dependence of the structure of bottom communities on the parameters of the river’s trophic status, biotopic diversity, and changes in hydrochemical parameters was determined. The environmental factors (total mineralization, ionic composition, pH, oxygen content, water temperature, overgrowth by macrophytes) influencing structural changes in macrozoobenthic community were determined. It is shown that diversity, number, and biomass of halotolerant macrozoobenthic communities increase with a rise in water mineralization from 6.9 to 14 mg/L. A new halophilic chironomid species of the family Chironominae, Tanytarsus kharaensis Zorina et Zinchenko, has been found.
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