Rule of Seasonal Changes of the Ceratosolen sp.in the Tropical Rainforest of Xishuangbanna,China

The Ficus racemosa L.is a dominant tree species in the tropical rainforest in Xishuangbanna. F.racemosa and fig pollination wasps (Ceratosolen sp.) are highly coevolved mutualists that depend completely on each other for continued reproduction. F.racemosa must depends on the polination of the Ceratosolen sp.to complete its sexual reproduction.Meanwhile the fig wasp are dependent upon the gall flower (short stigmas) of the figs,in which their eggs and larvae and pupa develop.The main result of this study indicated that along with the season change of the population of Ceratosolen sp.,the summer and autumn population amount is high,and winter and spring population is low.The number of foundressess (reproductive female wasp) penetrated into the fig syconium has close correlation with the pollination and seed bearing rate of the syconium,as well as the oviposition and reproduction rate of the fig wasp it self.