钱塘江河口滩涂围垦区农田小兽种群分布格局初步研究

The Distribution Patterns of the Small Mammal Population in the Polder Area of the Qiantang River in Zhejiang

1987年8月和1989年8月对钱塘江河口滩涂围垦区农田小型兽类的调查得知,农田小兽各种群的分布格局均为负二项分布.种群集聚度的大小依次为黄毛鼠、黑线姬鼠、臭鼩和大麝鼩。在6种不同的农田类型中,各种群的集聚度有异,呈现不同的分布格局.种群的集聚度与种群的密度、栖息地生境及群落结构之间都存在相互的影响.

The small mammal population distribution pattern was investigated in the farmland of the polder area of the Qiantang River in August 1987 and 1989. The results are as follows : 1.In the study area, the small mammal population has the negative binomial distribution pattern in the farmland. 2.In 6 kinds of farmland types, there are different distribution patterns for each small mammal population because of the different population colony degree. 3.The population colony degree ( I ) of Rattus losea is highest (I = 4.6670). The degrees of Apodemus agrarius, Suncus murinus and Crocidura dracula are separately 3.4717, 1.4396 and 1.2987. 4.The population colony degree is influenced by the population density, habitats and community structure of the small mammals.