内蒙古白音锡勒典型草原区鼠类群落多样性的研究

在草原生态系统中,鼠类既是消费者又是次级生产者,因此这个类群在草原生态系统中占有重要的地位。 鼠类群落结构是生态系统结构的一部分,它的存在是地理的、生态的和进化的诸因素共同作用的结果。鼠类群落的多样性,反映了同一地区各群落之间的相似程度,也反映了群落与其外界条件的关系,它作为群落的结构参数,是群落特征的重要方面,日益受到生态学工作者的重视。 1979年7-9月,我们曾对内蒙古白音锡勒典型草原区的鼠类群落空间配置及其结构进行研究(钟文勤等,1981)。本文将通过分析这些群落的多样性,进一步探讨鼠类群落与植被、土壤等条件的关系。

STUDY ON SPECIES DIVERSITY OF RODENT COMMUNITIES IN BAIYINXILE TYPICAL STEPPE,INNER MONGLIA

The structure and spatial pattern of rodent communities were studied, sampled from July to September in the year 1979 in Baiyinxile typical steppe, Inner Mongolia. In this paper, the rodent species diversities were calculated based on the data from the same communities.There is positive correlation between the species diversities (H') of the plants and of the rodents in these communities. the evenness (J') of the rodent is correlated positively with plant evenness. There is no linear correlation between the species number of the plants and of the rodents.The rodent species diversity is correlated negatively with the height of the herb layer, the percentage of vegetation cover and the soil moisture content, respectively, The plant species diversity is also correlated negatively to these three parameters.H', the Shannon-wiener index, integrately respones to the evenness and the species number. Using H' for the species diversity of rodent community is better than the species number.