北美CHIHUAHUAN荒漠17种啮齿动物的日耗能动态比较

利用时间序列分析方法，季节性指标和主分量分析比较了北美Ｃｈｉｈｕａｈｕａｎ荒漠１７种啮齿动物的日耗能动态，结果显示：（１）各物种种群日耗能一般随环境改变有相似年变化，但季节变化呈多样化；（２）只有盘尼西拉特斯更格卢鼠有明显的季节性；（３）各物种种群日耗能的对数与体重的对数成正相关关系，与种群密度的对数也成正相关关系，与扩菜距离的对数成负相关关系；（４）１７个物种可划分为４个日耗能类型，即优势型，季

A COMPARISON OF DAILY ENERGY EXPENDITURE OF SEVENTEEN SPECIES OF RODENTS IN THE CHIHUAHUAN DESERT

Time series method,seasonality index and principle component analysis allowed us to compare daily energy expenditure(DEE)patterns of the 17 special of rodents in the Chihuahuan Desert.The results suggest:(1)responding to the changing environment,DEE of most species showed similarly interanual variation,however,diveraified seasonal patterns;(2)only C.penicillatus showed conspicuous seasonal pattern;(3) DEE of the rodents was negatively correlated with their dispersal distance; (4)17 species of rodents fell into four type of DEE:i.e.dominants, seasoners,commoners and rare visitors.Trade offs and compatibility in the major ecological characteristics among four types of rodents resulted in the relative Stability of community DEE.