兽类学报2025，Vol.45Issue(5)：629-640,12.DOI:10.16829/j.slxb.151021
雅鲁藏布江流域亚洲黑熊适生区与活动节律
Suitable distribution area and activity patterns study of Asiatic black bear in the Yarlung Zangbo River basin
摘要
Abstract
The Asiatic black bear(Ursus thibetanus),belonging to the family Ursidae within the Carnivora order,is clas-sified as a second-class protected wild animal in China.Unfortunately,its population size and distribution range are de-clining due to habitat fragmentation caused by human activities,intensifying conflicts between humans and bears.To un-derstand the distribution patterns of Asian black bears in the Yarlung Zangbo River basin,we employed the MaxEnt mod-el to analyze its current habitat distribution and influencing factors based on long-term camera trap and field survey data,in conjunction with elevation,aspect,slope and 19 bioclimatic variables.Furthermore,we predicted the trend of habitat change under different future climate change scenarios within this region and investigated the daily and monthly activity patterns using recorded data from camera traps.We found that the AUC value of the best fitted MaxEnt model was 0.972,indicating high accuracy after screening for climate and terrain factors.The key factors affecting the distribution of Asiatic black bears were altitude,temperature annual range,and precipitation of warmest quarter.Currently suitable distribution areas for Asiatic black bears are mainly concentrated in the Nyingchi region,with a smaller portion distribut-ed in Shigatse and Shannan regions.With increasing temperatures in the future,suitable areas would not change signifi-cantly,but they will migrate to higher altitude along Yarlung Zangbo River and its tributaries.The activity pattern of Asi-atic black bears in the Yarlung Zangbo River basin was primarily characterized by crepuscular behavior,with peak activi-ty intensity observed during the summer and autumn seasons.This study provides basic data for comprehending the pres-ent and future distribution patterns as well as behavioral tendencies of Asiatic black bears.Furthermore,it offers theoreti-cal insights for future conservation and management efforts aimed at mitigating human-bear conflicts in the Yarlung Zangbo River basin.关键词
MaxEnt模型/雅鲁藏布江流域/气候变化/活动节律/亚洲黑熊Key words
MaxEnt model/Yarlung Zangbo River basin/Climate change/Activity rhythm/Asiatic black bear(Ursus thibetanus)分类
生物科学引用本文复制引用
吕永磊,普布顿珠,边巴多吉,旦增,胡开,王小川,温知新,杨奇森,王伟波,崔雅倩,刘郢,周薇,王渊,刘锋,王广龙,扈晶晶..雅鲁藏布江流域亚洲黑熊适生区与活动节律[J].兽类学报,2025,45(5):629-640,12.基金项目
雅鲁藏布江流域典型大中型哺乳动物分布数量、活动规律的动态监测(54000022T000000071200,54000024210200021038) （54000022T000000071200,54000024210200021038）
西藏重点区域野生动植物资源调查(ZL202203601) （ZL202203601）
国家自然科学基金面上项目:西藏自然保护区网络兽类多样性保护关键因子研究(32271736) （32271736）
