摘要
根据内蒙古阿巴嘎旗那仁宝力格苏木1979～1997年啮齿动物监测资料,利用变动指数(S),得知布氏田鼠(Microtusbrandti)密度的年际动态具有一定的周期性。1989～1997年共捕啮齿动物10种,其中田鼠占8845%,达乌尔鼠兔(Ochotonadaurica)占537%。总密度(单位面积上啮齿动物的密度之和)、田鼠密度、鼠兔密度间均呈正相关(P=00001),回归模型为:总密度=08806+10048(田鼠密度)+08779(鼠兔密度)(P=00001)。田鼠密度显著地影响鼠类的多样性和均匀性。1970～1997年,田鼠在鼠类群落中占绝对优势。
The population data of rodents in Narenbaolige Sumu,Abaga Banner,Inner Mongolia during 1979-1997 showed annual cyclical fluctuations of Microtus brandti population to a certain degree by cycling index ( S ).There were 10 rodent species,with M.brandti (88 45%) and Ochotona daurica (5 37%) in 1989-1997.There were positive correlation relationships among the total densities (the sum of population densities of rodents in unit area),density of M.brandti and O.daurica ( P =0 0001).The regression model was:the total densities=0 8806+1 0048 (density of M.brandti )+0 8779 (density of O.dauricus ) ( P =0 0001).The diversity and evenness of rodents were influenced significantly by the density of M.brandti .Absolute dominant species was M.brandti in rodent community during 1970-1997.
基金
国家自然科学基金!资助项目 ( 3 95 70 6 3 8)
关键词
田鼠
布氏田鼠
密度
周期
多样性
演替
Brandt's vole ( Microtus brandti ),Density,Cycle,Diversity,Succession
