Distribution and Ecological Groups of Mollusks in Streams Flowing from Springs and Springs in the Regions of the Zarafshan Mountain Range

We determined the distribution of 6 types of mollusks in the Daraytutsoy streams in the desert region of the Zarafshan Mountains, 9 in the Yettiuylisoy streams in the hilly region, and 7 in the Omonkutonsoy streams in the mountain region. The streams of the desert and mountain regions differ in the number of species compared to the streams of the hilly region. The reason for this may be that different factors in the water had an effect on the distribution of species. If the water temperature of the streams receiving water from springs and springs in the mountain region is relatively low and the flow speed is high, the water of the desert region is distinguished by the high influence of aneropogenic factors. Optimum temperature in the waters of the flat land region has a maximum effect on the number and density of species, up to 9 species are distributed in this region. It was found that 1 species is distributed in rocky biotopes of streams, 8 species are distributed in sandy biotopes, and 7 species are found in muddy biotopes.