气候变化背景下青藏高原特有种唐古特红景天的地理分布格局预测OA北大核心CSTPCD

To explore the potential suitable distribution and ecological adaptability of Rhodiola tangutica on the Qinghai-Xizang Plateau,based on 38 distribution sites of Rhodiola tangutica across the plateau and seven environmental factors across current and future five periods,a relationship model between the distribution of Rhodiola tangutica and environmental factors was constructed using the MaxEnt model.The potential geographical distribution patterns for the current period(1970-2000)and four future periods(2030s,2050s,2070s and 2090s)under the SSP245 scenario were simulated and verified.The findings revealed that:(1)Altitude(Alt)and precipitation of the driest month(Bio14)were the most important ecological factors influencing the geographical distribution of Rhodiola tangutica,contributing rates of 89.3%and 4.9%,respectively.(2)under the current climatic context,the total suitable distribution area of Rhodiola tangutica on the Qinghai-Xizang Plateau was approximately 195.21×10⁴ km²,predominantly situated in the southern and northeastern parts of Qinghai,northwestern Sichuan,and central Xizang.(3)compared with the current period,the total suitable distribution area of Rhodiola tangutica in the next four periods would not change obviously;however,the area of high suitability would increase,with a tendency of concentrated distribution to the central Qinghai-Xizang Plateau.