基于最大熵模型的林芝市亚洲黑熊生境适宜性研究OA

The spatial distribution patterns of wildlife and their relationship with environmental factors are prerequisites for developing rational and effective conservation measures.To better understand the distribution of Asian black bears(Ursus thibetanus)in Linzhi,Xizang,this study,based on infrared camera data and field surveys,recorded 99 bear occurrence sites and 12 key environmental variables.On this basis,the MaxEnt model and GIS software were applied to predict the potential habitat distribution of Ursus thibetanus in Linzhi.The results showed:(1)The average area under the ROC curve(AUC)was 0.962,indicating high prediction accuracy.This makes the results a reliable basis for identifying potential black bear habitats.(2)The total habitat area for Asian black bears in Linzhi was 26 025.23 km².This included 2 813.31 km² of high quality habitat,5 986.44 km² of medium quality habitat,and 17 225.48 km² of low quality habitat.Areas unsuitable for habitation spanned 88 374.77 km².(3)The results of Jackknife analysis showed that the distance from the residential area,land use type,the highest temperature of the warmest month,and the normalized vegetation index were important factors affecting the potential habitat of Asian black bears.Other factors,such as distance from the road,slope,aspect and distance from the river,had little effect on the distribution of black bears.