蓝马鸡繁殖期的夜栖地选择

Selection of Roosting-Sites for Blue-Eared Pheasants in Breeding Season

[目的]研究蓝马鸡繁殖期的夜栖地特征以及影响夜栖地选择的因素。[方法]在蓝马鸡的繁殖季节,在甘肃省尕海—则岔自然保护区选择32个蓝马鸡夜栖地样方和45个对照样方,调查并测量各个样方中的地形、植被、距离等15个参数。数据进行卡方检验以及差异显著性分析,并采用主成分分析方法分析影响蓝马鸡栖息地选择的主要环境因子。[结果]经卡方检验,坡向和坡位对蓝马鸡夜栖地的选择影响很大;夜栖地样区的乔木胸径、高度和盖度显著高于对照样区,灌木盖度、灌木高度、草本盖度和草本高度显著低于对照样区;主成分分析表明灌木盖度、灌木高度、距小路距离、苔藓盖度和草本高度是影响蓝马鸡夜栖地选择的主要因子。[结论]蓝马鸡偏向选择阳坡和高坡位,以及具有较大灌木高度和盖度的针叶林为夜栖地。

[Objective] To represent characteristics of roosting-sites of blue-eared pheasant（Crossoptilon auritumin） in breeding season and the factors affecting selection of roosting-sites.[Method] A total of 32 roosting-sites of blue-eared pheasants and 45 control sites were selected from the Gahai-Zecha Nature Reserve in Gansu Province in breeding season.Fifteen habitat factors including landform,vegetation and distance were surveyed.Chi-square test and test of significance were conducted.And major environmental factors affecting selection of roosting-sites were determined by principal component analysis.[Result] As shown by the Chi-square analysis,roosting-sites were characterized by sunny slope;steeper slope;higher arbor cover,arbor height and trunk diameter;and lower shrub cover,shrub height,grasses cover and grasses height.The principal component analysis showed that shrub cover,shrub height,distance to road,moss cover and grasses height were the key factors for the blue-eared pheasants to choose roosting-sites.