摘要
应用资源选择函数和资源选择指数对通河县乌拉浑林场内黑熊的生境选择进行了研究。结果表明,黑熊对生境的选择受到水源、倒木、地形因素以及隐蔽条件等因子的影响显著。黑熊对海拔较高(>350 m)、处于上坡位及适中坡度的生境表现为喜爱选择。黑熊生境资源选择函数为:Logistic(P)=-5.254+8.644×坡度+1.896×坡位+2.728×隐蔽级+4.626×郁闭度-1.795×地理性-14.901×距水源距离+2.356×距人为干扰距离+6.078×倒木数量+2.138×乔木种类。黑熊对生境的选择概率为:P=e^(logistic(p))/[1+e^(logistic(p))]。模型的正确率为96.2%。
Selection of habitats of black bears in Tonghe County was surveyed and analyzed with the function and index of resource selection with factors such as water,fallen trees,terrain factor and conditions for hiding：Logistic（p）=-5.254 ＋ 8.644 slope ＋ 1.896 slope position ＋2.728 hidden class ＋4.626 canopy-1.795 geographic-14.901 distance from water ＋ 2.356 interference ＋6.078 fallen trees ＋2.138 tree species;selection probability P = e^（Logistic（p））/[1 ＋ e^（Logistic（p））],accuracy of the model amounting to 96.2%.Results showed that habitats selected were located at higher altitude more than 350 m,with uphill location and moderate gradient.
