STUDIES ON THE CORRELATION BETWEEN Rhombomys opimus POPULATION DYNAMICS AND BIOMASS OF PLANTS IN INNER MONGOLIA DESERT | 内蒙古荒漠区大沙鼠种群动态与植物地上生物量相关性分析

chinois. 2009-2011年,连续3年采用查盗开洞法,对内蒙古阿拉善荒漠区梭梭（Haloxylon ammodendron）林生境中的大沙鼠（Rhombomys opimus）种群相对数量进行了调查,同时测定了梭梭林地上生物量动态,应用Pearson相关系数分析了大沙鼠数量动态与梭梭林地上生物量的相关性。结果表明,3个年度中,大沙鼠种群密度秋季均高于春季,梭梭林地上生物量秋季均高于春季。春季大沙鼠相对密度与梭梭地上生物量呈极显著负相关（r=-0.80,P〈0.01）,与梭梭高度呈极显著正相关（r=0.88,P〈0.01）,与梭梭盖度呈显著负相关（r=-0.71,P〈0.05）。秋季大沙鼠相对密度与梭梭地上生物量呈显著负相关（r=-0.69,P〈0.05）,与梭梭高度呈显著正相关（r=0.68,P〈0.05）,与梭梭盖度呈极显著负相关（r=-0.80,P〈0.01）,与白刺地上生物量呈极显著负相关（r=-0.84,P〈0.01）。

anglais. From 2009 to 2011, via ＂stifled and recovered rodent holes＂ investing the number of Rhombomys opimus on Alashan des- ert in Inner Mongolia, meanwhile survey the Biomass of Haloxylon ammodendron woodland. Using pearson correlation analysis the the number of Rhombomys opimus and the biomass of Italoxylon ammodendron woodland. Tile resuhs show that the number of effective holes for R. opimus in autumn was significantly higher than that in spring in those three years, the biomass of Haloxylon ammodendron woodland in autumn was significantly higher than that in spring in those three years, in the spring,The number of effective holes for R. opimus significantly negative correlated with the Biomass of Haloxylon ammodendron （ r = -0. 80, P 〈 0. 01 ）, positive correlated with the height of Haloxylon ammodendron （ r = 0.88, P 〈 0.01 ）, negative correlated with the coverage of Haloxylon ammodendron （ r = -0.71 ,P 〈0.05）. in the autumn, The number of effective holes for R. opimus significantly negative correlated with the Biomass of Haloxylon ammodendron （ r = - 0. 69, P 〈 0. 05 ）, positive correlated with the height of Haloxylon ammodendron （ r = 0.68, P 〈 0. 05 ）, negative correlated with the coverage of Haloxylon ammodendron（ r = -0.80,P 〈 0. 01）, negative correlated with the biomass of Ni- traria tangutorum Bobr （ r = - 0.84 .P 〈 0.01 ）.