Study On The Relationships Between Dynamic Of Soil Animals Biodiversity And Ecological Factors Of Different Halophilous Habitat In The Leymus Chinensis Grassland Of Jilin Province

Soil animals, the constituents of terrestrial ecosystem, are important consumers and special decomposers, and they are unusually significative to ecosystem。So the study on soil animals has extremely high learning significance and practical value。In this article, five halophilous habitats in the Leymus chinensis grassland of Jilin province that are Chloris virgata,Suaeda corniculata,Puccirrellia tenuiflora,Artemisia anethifolia Web. ex Stechm and one habitat there no plants grow on it were selected for study on the composition of soil animals community,the diversity dynamic,vertical distribution, similarity and coefficient correlation between soil animals and ecological factors。The results showed that we obtained 21 groups ,19684 soil animals (including large-size and middle-small-size) in the five halophilous habitat in the Leymus chinensis grassland of Jilin provinc that belong to 3 phylum,7class。The dominant groups are Actinedida, Oribatida and Gamasida,the common groups are Collembola, Coleoptera and Diptera,the number of rare groups is 15。The vertical distribution of soil animals is descending with the increasing of depth of soil layers. Thereinto the individual numbers put up obvious nature of surface gathering, and the numbers of groups are equable descending。The trend of the changes with month in the diversity of soil animals was coincident with their numbers of groups, but no direct correlation relations with individual density。Statistics analysis was indicated that the trend of the changes with month in the diversity index (H′)was coincident with that of eveness index(e), and contrary to that of dominance index (c),but was variated to that richness index (D) with different halophilous habitat。The main reason that affected dynamics of soil animals diversity was the different soil environment because of different habitats,the climatic factors has no obvious effecte on the dynamics。When consider synthetically the influence of the climatic and soil factors on dynamics of soil animals diversity , because of the habitat difference, the main influence factors is also different。The gradual regression equation analysis indicated that there are there main kinds of factors which influenced soil animal diversity , overall, the organic matter becomes the uppermost factors。...