鄂尔多斯沙地不同生境中鼠类群落结构的初步研究

目的了解鄂尔多斯沙地不同生境中鼠类群落的结构特征。方法2008年4—10月，采用夹夜法对鄂尔多斯沙地7种植被类型中的鼠类群落结构进行调查。结果不同生境中鼠类的种群密度和群落结构有差异，苜蓿地中鼠类物种数最多，为5种，多样性指数最大，为1．3075；沙打旺地仅捕到小毛足鼠。小毛足鼠为各种生境的优势鼠种，占总捕获量的65．83％，但其种群数量动态在不同生境间有差异。结论人为种植不同植被改变鄂尔多斯沙地生境条件，使鼠类群落结构和种群数量产生差异，因此在沙地草场利用过程中应重视鼠类与生境之间的相互作用。

Preliminary study on community structure of rodents in different habitats of Ordos sandland

Objective To investigate the community structure of rodents in different habitats of Ordos sandland. Methods From April to October 2008, the rodent communities in seven types of vegetation in Ordos sandland were investigated by night trapping method. Results The population density and community structure of rodents differed across various habitats. The alfalfa habitat had the most species of rodents （5 species） and the highest diversity index （1.3075）. Only Phodopus roborovskii was caught in the habitat ofAstragalus adsurgens. P. roborovskii was the dominant species in all habitats, accounting for 65.83% of all rodents, but its population dynamics were different between different habitats. Conclusion Planting different types of vegetation can change the habitat conditions in Ordos sandland, thus leading to changes in the community structure and population size of rodents. Attention should be paid to the interaction between rodents and habitats in the process of sandland use.