关键词: 鼠类数量, 典型相关分析, 气象因素

Abstract:

Objective To study the impact of farmland climate factors on the rodent community. Methods From 1978 to 1993, canonical correlation analysis of the farmland rodent density and climate factors in Kaijiang county, Sichuan province was conducted. Results In the period, the overall farmland rodent density was 5.58%-26.57% ; Apodemus agrarius density 1.91%-18.41% , Rattus norvegicus density 0.68%-10.86% , and Anourosorex squamipes density 0.47%-9.50% . Among the canonical correlation coefficients between 12 climate factors including temperature, humidity, rainfall and sunshine, and four variables (overall rodent density, Ap. agrarius density, R. norvegicu density, An. squamipes density), the first couple (correlation coefficient r＝1.0000) was statistically significant (χ²＝248.7032,P＜0.01). The largest coefficient of the rodent density was noted in the overall rodent density (4.7748), and the largest coefficient of the climate factors was the average sunshine from July to August (-3.1532), followed by average humidity from July to August (-1.6177) and then average rainfall from July to August (-1.4652). All were negatively correlated. Conclusion Farmland rodent quantity was mainly affected by average sunshine, humidity and rainfall from July to August.

Key words: Rodent quantity, Canonical correlation analysis, Climate factor