应用生态学报2024，Vol.35Issue(8)：2055-2062,8.DOI:10.13287/j.1001-9332.202408.026
三江源地区藏原羚冬、夏季生境适宜性差异与影响变量
Difference of habitat suitability and the influencing variables between winter and summer of Procapra picti-caudata in the Three-River-Source region,China
摘要
Abstract
Procapra picticaudata is an ungulate endemic to the Tibetan Plateau and is widely distributed in the Three-River-Source region.Predicting the seasonal variations in habitat suitability and understanding the effects of environmental variables on habitat use by this species will help formulate effective conservation strategies and clarify its niche characteristics.Based on point records of the occurrence collected during repeated field surveys in winter(January 2019)and summer(August 2019),we used MaxEnt model to predict the differences in habitat suitability and the distribution pattern of the P.picticaudata in the Three-River-Source region using eight preselected environ-mental variables.We further explored the influence of those variables on the P.picticaudata'distribution pattern using environmental response curves.The results showed that the average area under the receiving operator curve values in winter and summer was 0.901±0.023 and 0.882±0.024,respectively,with a good accuracy of fitness.The total area of suitable habitat for P.picticaudata in winter and summer was 6.83 × 104 and 9.78 × 104 km2,respectively.The area of suitable habitats in summer increased significantly compared with winter.There was a tendency for P.picticaudata to spread to the south of the Yangtze River Source Park and the Yellow River Source Park in summer.The spatial patterns of habitat suitability in both winter and summer took Three-River-Source National Park as the high-value center and decreased around it.The seasonal average temperature,altitude,popu-lation density,and slope were the main environmental variables affecting the distribution of P.picticaudata both in winter and summer.The higher temperatures in summer allowed the suitable P.picticaudata habitats to extend into areas above 5000 m in altitude,and to areas with slopes of less than 25°,compared with winter.The expansion of human activities in summer encroached on the suitable habitat of P.picticaudata.关键词
三江源地区/藏原羚/最大熵模型/生境适宜性/环境变量/季节变化Key words
Three-River-Source National Park/Procapra picticaudata/MaxEnt model/habitat suitability/envi-ronmental variable/seasonal change引用本文复制引用
鄢玲艳,张力,张小标,孔令桥,寇晓军,欧阳志云,胡金明..三江源地区藏原羚冬、夏季生境适宜性差异与影响变量[J].应用生态学报,2024,35(8):2055-2062,8.基金项目
本文由第二次青藏高原综合科学考察研究项目(2019QZKK0308)和中国科学院青年创新促进会(2022040)资助. （2019QZKK0308）
