西双版纳热带雨林聚果榕小蜂季节性变化规律

聚果榕是西双版纳热带雨林生态系统中的一个优势树种。聚果榕和它的传粉媒介昆虫聚果榕小是一种高度协同进化，互相依赖才能繁殖各自后代，互惠共生的生物。聚果榕必须依靠聚果榕小蜂的传粉才能获得有性繁殖；而聚果榕小蜂又必须依赖聚果榕的短柱头雌花作为繁殖后代的场所，才能获得种群的繁衍。研究结果表明，聚果榕小蜂的种群随季节变化而变化，雨季种群数量高，干季种群数量低，但进入同一榕果内繁殖产卵的雌蜂数量则相反，雨季数

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.