钱塘江河口滩涂围垦区农田小型兽类群落结构的初步研究

1987年8月和1989年8月,作者根据钱塘江河口滩涂不同年份进行围垦农田的土壤特性和不同农作物的生长地的条件,选择7个不同的样区,调查各样区内小型兽类的群落组成和数量比例,划分相应的群落,群落中的相似性指数以群落C与D最高,多样性指数和均匀度指数以群落E最高。黄毛鼠的分布与土壤的盐度及有机质C/N值之间有极显著的相关性。

THE COMMUNITY STRUCTURE OF THE SMALL MAM MALS IN THE RECLAIMED AREA OF QIANTANG RIVER

The structure of the small mammal community in the reclaimed area of the Qian- tang River were investigated in August 1987 and 1989.Results obtained are as follows. 1. The small mammals were captured in seven different ecological habitats in the reclaimed area and farmland area using the trap-night methods. According to the dataobtained, the small mammals in sample area can be divided into seven communities as below. A. Rattus losea community. B. R. losea + Apodemus agrarius community. C. A. agrarius+ R. losea community. D. A. agrarius + R. losed + Crocidura dracula community. E. A. agrarius + C. draculs + Suncus murinus community. F. A. agrarius+ S. murinus+ C. dracula community. G. A. agrarius + S. murinus community. 2. The index of the similarity between communities was related to the reclaimed time. The highest index has been foune in communily C-D. 3. The highest index of the diversity and the evennesss was in community E. 4. The bistribution of the small mammals was related to the crop type , the food and the soil type. Each had its most suitable habitat of rhe crod and the soil . There was very marked correlation between the distribution of R. losea and the salinity and C/N of soil. 5. The structure of the small mammal community was relaetd to the vegetation and the soil.