Ecological Characteristic Of Soil Animal In Zhalong National Nature Reserve

Soil ainmals,the important constituents of terrestrial ecosystem,are important consumersand special decomposers,and they unusually significative to ecosystem. Zhalong NationalNature Researve is the Wetland landscape.In this resgion, four plant communities that areLeymus chinensis, Puccinellia tenuiflora e,Carex duriuscula and Phragmites australioscommunities were selected for study on the composition of soil animals community, thecorrelation between soil animals and soil environmental factors.The results showed that we obtained 82 groups ,13463 soil animals (including large-sizeand middle-small-size) in the four communities of Zhalong National Nature Researve thatbelong to 6 phylum,10 class,21 order,51 famility. The dominant groups are Formicidae blackants, Rotifear and Namatoda. There are 76 grougs ,4359 Large-size soil animals that belongto 4 phylum,8 class,20 order,48 famility. The dominant groups are Formicidae black ants andOnychiuridae. There are 25 grougs ,9104 Large-size soil animals that belong to 5 phylum,6class,12 order,12 famility. The dominant groups are Rotifear and Namatoda.The number of groups of soil animals in Phragmites australios communitie is higherthan that in Puccinellia tenuiflora communitie, that in P. tenuiflora communitie is higherthan L. chinensis communitie, and that in L.chinensis communitie is higher than Carexduriuscula communitie. The individual number of soil animals in L. chinensis communitie ishigher than that in P. tenuiflora communitie, that in P. tenuiflora communitie is higher than P.australios communitie,and that in P. australios communitie is higher than C. duriusculacommunitie. The habitat of Carex duriuscula communitie is inferiorto the other threecommunities.And the horizontal distribution of soil animals is unequal. Theverticaldistribution of soil animals is descend with the increase of depth ofsoil layers.Theyshow obvious nature of surface gathering.The composition and structure of soil animals community in different seasons aredifferent. The number of groups in summer is higher distinctly than that in autumn, and thenumber of groups in autumn is higher distinctly than that in spring. The individual number ofsoil animals in summer is higher distinctly than that in spring, the individual number of soilanimals in autumn is higher distinctly than that in summer.The spring is loeest in he numberof groups or individual numbers.The number of groups and individual numbers large-size soilanimals appear different varied regularity in different habitats with seasonal changes.The diversity of soil animals community in C. duriuscula communitie is larger than thatin P. tenuiflora communitie, that in P. tenuiflora communitie is larger than P.australioscommunitie, and that in L. chinensis communitie is lowest.Through the analysis of the correlation between the number of grouphs of soil animalsand soil environmental essential factors,showed that the correlation between the number ofgroups and organic substance and soil environmental essential factors is obvious.Soil pHeffect largerly for the number of groups of soil and the dividual number of soil animals,but thequantity of water effect lowerly in soil.