夏季密点麻蜥生境的选择机制

The summer Eremias multiocellata's habitat selection mechanism

生境丧失或片段化是物种多样性丧失及物种灭绝原因之一。本文选择密点麻蜥的三种生境类型,优势植物分别是油蒿(Artemisia ordosica Krasch)、羊柴(Hedysarum mongdicum Turcz Var)和麻黄(Ephedra sinica)。对不同生境的密点麻蜥种群密度及优势植物高度、植被盖度、植被丰富度、食物(昆虫)资源量、昆虫丰富度、裸地比例6个生态因子进行调查。计算密点麻蜥密度,采用U检验及因子分析。结果表明密点麻蜥偏爱中等植被高度、盖度及具有一定裸地比例的生境;A样地中食物(昆虫)资源量、昆虫丰富度对被提取的公因子的解释能力非常强,其次是植物丰富度;而其余三个变量的解释能力不是太强。

Habitat loss or fragmentation is one of the reasons that lead to the loss of species diversity and spe- cies extinctionc. we Select Eremias--multiocellata＇s three types habitat, the dominant plant is in proper order Ar- temisia ordosica Krasch, Hedysarum mongdieum Turcz Var and Ephedra sinica. Survey the different habitats Ere-mias--multiocellata＇s population density and advantage plant height, vegetation cover, vegetation abundance, food resources （insects）, insect abundance, the proportion of bare land the 6 ecological factors. We calculated the Ere- mias multiocellata＇s density; U test and factor analysis. The results show that the Eremias multiocellata prefer moderate vegetation height, cover and having a certain proportion of bare ground habitats; A sample plot＇s food （insects） resources, insect richness have the ability of explain the public factors to be extracted is very strong, fol- lowed by plant richness;remaining three variables is not too strong explanatory power.