九华山土壤动物的垂直分布

VERTICAL DISTRIBUTION OF SOIL ANIMAL ON THE JIUHUA MOUNTAIN

本文根据多年调查结果，从土壤动物群落结构几项重要指标，定量分析，探明了九华山土壤动物的垂直分异规律和季节变化规律。

Jiuhua Mountain,Community of Soil animal,Habitat distribution type Abstract From May,1986,to December,1992,We investigated Soil animals in 4 habitat typesin the Jiuhua Mountain for seven times.16608 soil animals have been collected They belongto 5 phyla 13 classes 37 orders and 95 Families.Among them,Acarid,Collembola and Ne-matoda are dominant genera which account for 74.41%of the total collected population,Therules of vertical change in soil animal community are:Except Community Ⅰ which is mostlyaffected by human activities the group number increases with the increase of sea-level eleva-tion and organic matter the individual number (N)and density(D)of middle and small soilanimals decrease with the increase of sea-level elevation and the decrease of temperature;Shannon's indices(H)of communities are Ⅳ >Ⅲ>Ⅱ>Ⅰ,which are in accordance with thechange of group number.The trend of the changes in S. D of each community and H. E oflarge soil animals is November>December>May>August. The indices of H and E of mid-dle and small soil animals are contrary to those of large soil animals,which are May>Au-gust > December>November. The habitat condition is superior.community Ⅳ which hasthe most organic matter has the most narrow distribution pattern. Community Ⅰ which ismostly affected by human activities has no narrow distribution pattern community.