生长季节初期高山针叶林小生境土壤动物群落多样性

研究了非生长季节向生长季节转换过程中川西高山森林土壤动物群落结构和多样性的特征,以期解释土壤动物群落的自适应变化.从川西高山原始针叶林下6种小生境共捕获大型土壤动物为3 167只,隶属于2门8纲16目,以林隙小生境内大型土壤动物的个体密度(530.71只/m2)和类群数量(10类)最高;中小型土壤动物为10 585只,隶属于4门8纲8目,以苔藓小生境内中小型土壤动物的个体密度(148 400.00只/m2)和林隙小生境中类群数(8类)最高.林隙小生境中的大型土壤动物群落Shannon-Wiener多样性指数H’和Pielou均匀性指数J最高,Simpson优势度指数C最低,但倒木小生境表现出相反的趋势.林下凋落物小生境的中小型土壤动物群落多样性指数H’最高,C最低,但灌木小生境则相反.

Diversity of Soil Animal Community in Microhabitats of Alpine Coniferous Forest at Early Stage of Growing Season

The characteristics of community structure and diversity of soil animal in alpine forest of western Sichuan,China in the progress from non-growing season to growing season were investigated in this study to explain the changes in soil animal community adapting themselves to environment.Totally 3 167 individuals of macro-fauna were collected in the six microhabitats,and all the samples were classified to 2 phyla,8 classes and 16 orders.It was found that the highest density was 530.71 ind m-2 and the largest number of groups was 10 taxon in macro-fauna.10 585 individuals of micro-fauna and meso-fauna were collected in the six microhabitats which belonged to 4 phyla,8 classes and 8 orders among the primary(Abies faxoniana) forest of western Sichuan,China.The highest density was 148 400.00 ind m-2 in the microhabitat of moss and the largest number of groups was 10 taxon in the microhabitat of forest gap.The Shannon-Wiener diversity index(H’) and Pielou homogeneity index(J) of macro-soil fauna community were the maximum in the microhabitat of forest gap,and Simpson dominance index(C) was the minimum,b ut these parameters were opposite in the microhabitat of fallen tree.Furthermore,the diversity index H’ of meso-soil fauna community was the maximum and C was the minimum in the microhabitat of forest floor litter,but they were opposite in the microhabitat of shrub.