关键词: 湿地, 土壤微生物量碳氮磷, 容重, 粘粒, 土壤剖面

Abstract: Habitat destruction is one of the main factors inducing the decrease of species diversity. By using a non-autonomous multi-species competition-coexistence model and Shannon diversity index, the responses of different metapopulation species diversity to the temporal heterogeneity of different rates and velocities of habitat destruction were analyzed. The results showed that under instantaneous destruction, the species diversity decreased rapidly first, recovered to a definite extent sooner, and went to equilibrium then. Under continuous and complete destruction, habitat destruction rate had obvious effects on species diversity when q was lower, but few effects when q was higher. Under continuous and partial destruction, the higher velocity the habitat destruction,the greater amplitude the species diversity had, which was not beneficial to the stabilization of community.

Key words: Wetland, Soil microbial biomass C, N, and P, Bulk density, Soil clay granule, Profiles