中国黑琴鸡东部分布区资源现状及巢址生境评价

应用截线法、访问法、交尾地调查相结合的方法对我国黑琴鸡东部分布区资源现状进行了调查,并对该分布区巢址的林型、食物丰富度、隐蔽级、干扰级、距水源距离、坡向、坡位、坡度、巢位、海拔高度共10项生境因子进行分析。结果显示:我国东部分布区黑琴鸡种群数量为(24 785±2 737)只。河北围场县塞罕坝林区种群密度最高,达到(7.28±0.875)只/km2,内蒙古红花尔基林区种群密度次之,为(5.347±0.645)只/km2,河北木兰围场林区种群密度第三,为(3.94±0.474)只/km2。在该分布区中,影响巢址选择的生境因子主要有距水源距离、食物丰富度、隐蔽级、林型、坡向和干扰级,其中塞罕坝林区、红花尔基林区和木兰围场林区是黑琴鸡巢址选择的最佳生境。

Population Status and Nest-Site Habitat Evaluation of Black Grouse(Lyrurus tetrix)in Its Eastern Distribution Areas in China

A survey on resource status of black grouse(Lyrurus tetrix) in its eastern distribution areas in China was conducted using line transect sampling method,interview method,and breeding field investigation method.Ten habitat factors influencing nest location of black grouse were analyzed,which are forest type,food abundance,hidden degree,disturbances,distance to water source,slope aspect,slope position,gradient,nest position,and altitude.Result showed that the population size of black grouse was 24785±2737 individuals.The population density of black grouse in Saihanba forest region in Hebei was the highest(7.28±0.875ind./km2),followed by Honghuaerji forest region in Inner Mongolia(5.347±0.645) and Mulanweichang forest region(3.94±0.474) in Hebei Province.In this distribution area of black grouse,factors which influence nest-site selection are distance to water source,food abundance,hidden degree,forest type,slope aspect,and disturbances.Saihanba,Honghuaerji and Mulanweichang forest regions are suitable nesting habitats for black grouse.