Relation between geographical distribution of Calligonum junceum community and climatic factors in Xinjiang

From 2016 to 2018, a field survey was conducted on the distribution status of <i>Calligonum junceum</i> community in arid areas of Xinjiang. The results indicate that the <i>Calligonum junceum</i> is distributed mainly between 43.30&deg;~47.38&deg;N and 84.33&deg;- 90.13&deg;E, with an elevation range of 441-936m, and the ideal mean annual temperature range is between 2.99~10.48&deg;C. The most appropriate mean sunshine hours ranged from 2710.28~3140.64 hours. The most appropriate mean precipitation ranged from 72.42~206.01mm. The most appropriate mean evaporation ranged from 1532.27~2768.15mm. The most appropriate WI ranged from 58.81~112.27&deg;C. The most appropriate CI ranged from -87.87~-43.15&deg;C. The most appropriate HI ranged from 0.77~2.89. The analysis suggests that various climatic factors impact the distribution of <i>Calligonum junceum</i>, with thermal conditions exerting the strongest influence, followed by light, precipitation, snow, and human activities.