摘要:为更好的了解及保护荒漠沙蜥（Phrynocephalus przewalskii）资源，于2017年5-6月和9-10月，在内蒙古贺兰山国家级自然保护区采用样线调查法对其春、秋2季的生境选择进行研究。春季测定了92个荒漠沙蜥生境利用样方和64个对照样方、秋季测定了71个荒漠沙蜥生境利用样方和76个对照样方的共13种生态因子。利用拟合优度卡方检验、Vanderploeg & Scavia's选择指数、Mann-White U检验和逐步判别分析确定影响其春秋季生境选择的关键因子。结果表明，荒漠沙蜥的生境选择存在季节性差异。春季一般选择食物丰富度高，隐蔽性好，光照强，地表温度高、湿度低的生境，既保证安全因素又利于达到最适体温，满足繁殖需求；秋季偏好选择土壤质地疏松，食物丰富度高和中的草甸地区，便于隐蔽及累积食物，以满足其躲避天敌、储存越冬能量的需要。



Abstract:In order to understand desert lizard (Phrynocephalus przewalskii) resources as well as protect it well, we used the line intercept method and thirteen environment factors to investigate its habitat selection in Inner Mongolia Helan Mountain National Nature Reserve from May to June and September to October 2017. A total of 92 and 71 utilized plots and 64 and 76 control plots were measured in spring and autumn, respectively. Goodness of fit test, Vanderploeg & Scavia's selection index, Mann-White U test and Stepwise discriminant analysis methods were used to assess fourteen ecological factors in the desert lizard plots and control plots in each season, aiming to determine the main ecological factors affecting desert lizard habitat selection in each season. The results revealed significant differences in desert lizard habitat selection between spring and autumn seasons. In spring, the desert lizard generally selected habitats with adequate sunshine, high surface temperature and low humidity, which ensured its safety by providing rich food resources and cover. Optimum temperature, in particular, was essential for its growth and reproduction. In autumn, the desert lizard preferred meadow areas with rich or moderate food resources and loose soil, ensuring easy access to shelter and food.





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