环境因子对荒漠沙蜥种群密度影响的研究

本文研究人类改造荒漠的活动，植被，潜在的可利用的食物资源，竞争种的密度，土壤理化性质等坏境因子对荒漠沙蜥种群密度的影响。结果说明：人类的活动对沙蜥种群密度没有显著影响；决定沙蜥种群密度的主导因子是潜在的可利用的食物资源，植被，土壤含水量，竞争种的密度。这些因子的任何改变都能改变沙蜥的种群密度，均具有调节种群的作用。

THE EFFECTS OF ENVIRONMENTAL FACTORS ON POPULATION DENSITY OFPhrynocephalus przewalskii

There were many articles which revealed the regulation of animal populations, but there was not the article that in same condition researched into effects of many factors on density of population at same time. Our work was carried out in Minqin Experimental Station of Adminstering Desert from April to mid-June in 1989. In order to study that action administered desert by human, vegetation, potential available food resources, densities of competitive species and physical and chemical characters of soil affect population density of Phrynocephalus przewalskii.The results showed that it was in significant that the action administered desert by human affects population density of Phrynocephalus przewalskii. The potential available food resources, vegetation, the moisture of soil, the densities of competitive species are determinate factors which affect population density of Phrynocephalus przewalskii. Because the changes of population density of Phrynocephalus przewalskii along with any changes of these factors, these factors all have the effects on regulating population.