XVI International Botanical Congess
The maintenance of species diversity in community is divided into increasing process (speciation, invasion), decreasing process (extinction) and species coexistence three parts. The internal cause of species coexistence is the variety of species biological and ecological property, external cause is the habitation heterogeneity. The habitation heterogeneity is the basis of species diversity and drive community organization process. Patches mosaic structure of community due to gap leads species diversity. Patches mosaic is basic property of community and makes the structure and function of ecosystem prolonged maintaining. The patches mosaic pattern and species diversity of the Monsoon evergreen broadleaved forest in Dinghushan Biosphere Reserve have been discussed.