陕西地区啮齿动物种数分布与生态因子关系的分析  

AN ANALYSIS OF RELATIONSHIP BETWEEN ECOLOGICAL FACTORS AND NUMBER OF SPECIES OF RODENTS IN SHAANXI DISTRICT

作　　者：李晓晨[1] 王廷正[1] 

机构地区：[1]陕西师范大学生物系

出　　处：《兽类学报》1996年第2期129-135,共7页Acta Theriologica Sinica

摘　　要：本文初步分析了陕西地区啮齿动物种数分布与生态因子之间的关系。根据自然地理概况，将陕西地区划分为七个啮齿动物地理区。对不同地理区内可能影响啮齿动物种数的４种生态因子与啮齿类物种数之间进行多元线性回归分析。结果表明，气温、降雨量、森林覆盖率及面积与啮齿类物种数之间呈显著正相关。对秦岭、大巴山地区啮齿类的垂直分布也进行了分析。结果表明，啮齿类物种数与海拔高度呈显著负相关。啮齿动物种数与景观类型也有密切关系，景观类型越复杂，啮齿类物种数越丰富。此外，农业活动对啮齿类物种数也有影响，即耕作区种数少于非耕作区。This paper preliminarily analysed the relationship between ecological factors and the number of species of rodents in Shaanxi district.According to geographical features,Shaanxi district was divided into seven geographical regions of rodents:desert area along the Great wall,north Loess Plateau,south Loess Plateau,Guanzhong plain,Qinling mountain district,Hanjiang basin and Dabashan mountain district.Four ecological factors which possibly affect the number of species of rodents in different zoogegographical regions were studied with multiple linear regression analysis.Regression equation was Y=-4.72+2.69X1+3.79×10-2X2+0.11X3+9.45×10-4X4(RR=0.997,P<0,05)The computation results summed above indicated that there were positive correlation between the number of species and temperature(X1),precipitation.(X2),percentage of forest areas(X3)and areas of each zoogeographical region.Higher temperature and adequate precipitation are good for plant growth which is indispensable to rodents.Forests offer rodents hidden places and foods.The regression equation also pointed out that area cast less influence on the number of species than other factors did.The vertical distribution of rodents was also studied.The correlation coefficient between heigt and the number of species was-0.85,which indicated that the number of species of rodents went down as heigt got higher.The natural landscape also cast influence on the species diversity,in another word,the more complicated the natural landscape was,there were more species of rodents.

关 键 词：啮齿类 多样性 生态因子 分析 分布 陕西 

分 类 号：Q959.837[生物学—动物学]