宁夏荒漠草原植物多样性对地面节肢动物功能群多样性的影响

A field survey was undertaken to investigate the functional composition and its diversity distribution of ground-active arthropods as well as plant diversity in the desertified steppe of Ningxia,at summer and autumn of 2012. The results showed:The total individuals,group richness and Shannon index of phytophagous groups were higher in spring than in summer,and the autumn values are intermediate. The total individuals and group richness of predatory groups was significantly higher in autumn than in spring and summer,while the Shannon index was higher in autumn than in summer,the spring values are intermediate. The total individuals and group richness of omnivorous animals was significantly higher in spring than in summer and autumn,while the Shannon index was significantly higher in autumn than in spring and summer. The total individuals of phytophagous and omnivorous groups were positively correlated with plant individuals,the group richness of predatory was positively correlated with plant species richness,and the biomass of phytophagous and predatory groups was positively correlated with the biomass of plant. whereas the group richness of phytophagous groups was negatively correlated with plant species richness,and the Shannon index of phytophagous groups was negatively correlated with plant species richness. It was concluded that the functional diversity of the ground-active arthropods was affected by the seasonal changes. There was a complex linear relationship between the trophic diversity of ground-active arthropods and plant diversity in the desertified steppe of Ningxia.