Цөлөрхөг хээрийн Агь-таана-говийн хялганат бүлгэмдлийн зонхилогч зүйлүүдийн үүрэг оролцооны үзүүлэлтийн өөрчлөгдөлд цаг агаарын үзүүлэлтүүдийн нөлөөлөл, цаашдын хандлага. (Mongolian)

This study was carried out from 2010 to 2022, conducted in the long-term monitoring research area of the vegetation community in the desert steppe of Dalanjargalan soum, Dornogovi province. We had been determined the Importance and Relative Value (IRV) of the dominant species in the vegetation community of desert steppe, which were Allium polyrhizum, Artemisia frigida, and Stipa gobica at the two different plots that were fenced and non-fenced. Therefore, we also examined the Pearson correlation between IRV of dominant species and climate (mean air temperature, total precipitation, and mean soil temperature by annual and growing season which were from April to October) and livestock. Our results showed that at IRV of Artemisia frigida was 2.8 times increased then became the primary dominant community in the non-fenced plots in 2022. On the other hand, the IRV of Allium polyrhizum decreased by 3.3 times, the IRV of Stipa gobica was 1.9 times increased then it became the primary dominant of the community in the fenced plot in 2022. The Pearson’s correlation analysis result showed that mean air temperature and soil temperature of the growing season were positively affecting on IRV of Stipa gobica, but negatively affecting on IRV of Allium polyrhizum. In the future, when the soil temperature during the plant growth period increases by 1oC the IRV of Allium polyrhizum tends to decrease by 0.03 times, while IRV of Stipa gobica tends to increase by 0.03 times will increase. Therefore, IRV of Stipa gobica will increase by 2.41 times which growing season mean air temperature will increase by 1oC. According to this, Stipa gobica, which is the main dominant of the desert steppe community, increases with a positive direct relationship to the average soil and air temperature during the growing season and tends to play the role of the main dominant of the community. [ABSTRACT FROM AUTHOR]

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