褐翅鸦鹃春季生境选择初步研究

2012年2～4月,对广西宜州市的褐翅鸦鹃(Centropussinensis)生境选择进行了初步研究.共测量了70个20 m×20 m样方11个生态因子,对照样方88个,运用频次分析表明:褐翅鸦鹃选择利用郁闭度良好,避风性良好,水源距离10～100 m,乔木密度4～40株,灌木密度10～100株,乔木距离<1 m,灌木距离>1 m,树径<0.4 m,人为干扰距离10～100 m,食物丰富的生境.主成分分析结果表明,前4个主成分的选择特征值均大于1,其累计贡献率达70.342%,影响春季生境选择的主要因子为隐蔽性因子,次要因子是安全性和地理性因子、食物和水源因子和干扰性因子.减少人类活动对鸟类生境的破坏是促进褐翅鸦鹃种群数量和分布增加的重要途径.

The Primarily Analyses Habitat Preference of Common Coucal in Spring

The habitat preference of Common coucal(Centropussinensis)was investigated from February to April 2012 in Yizhou,Guangxi China.In field,eleven ecological factors were measured in 70 used quadrats(20 m×20 m)and 88 control quadrats,respectively.Vanderloeg and Scavia habitat selection index show that:the well canopy density,the well shelter of wind,the distance from water about 10 to 100 m,the tree density about 4 to 40 ind./plot,the shrub density about 10 to 100 ind./plot,the distance to tree less than 1 m,the distance to shrub more than 1 m,the diameter of tree less than 0.4 m,the human disturbance distance about 10 to 100 m and the well food richness were preferred in spring.The total eigenvalue contribution of the four factors was 70.342%.The first principal component belonging to safety factor was a major factor affecting spring habitat selection of Commoncoucal.How to reduce the human disturbanc was the key factor for increasing population number and distribution region.