【摘要】 详细报道了云南思茅菜阳河自然保护区的热带雨林植被．探讨了它的植物种类组成、群落结构和生物地理特点。菜阳河自然保护区的热带雨林具有与赤道地区的典型热带雨林类似的群落结构、生态外貌特征和植物区系组成．仍应是真正热带雨林的一个类型，是西双版沟谷季节雨林向北延伸、嵌入的部分。亦是滇南热带季节雨林群落的最北缘和海拔极限的类型。该热带季节雨林在性质上属于印度一马来西亚热带雨林的北缘部分。在发生和分布上受局部地形的影响和制约。菜阳河热带季节雨林的植物区系作为西双版纳热带雨林植物区系的北延部分、以热带成分占优势，带有明显印度一马来西亚植物区系特点．同时又具有明显热带边缘性质和植物地理过渡与交汇带特点。与西双版纳热带季节雨林相比，在菜阳河自然保护区的热带季节雨林中、典型热带雨林的一些成分已不存在或很少见．构成其热带雨林的上层树种中有一定比例的先锋成分、这意味着该热带季节雨林具有衍生性质，并暗示了滇南的热带季节雨林发生历史相对较晚．是在晚第三纪横断山隆升到一定高度。热带潮湿气候在局部生境形成以后发展起来的。更多还原

【Abstract】 The tropical. rain forest vegetation in Caiyanghe Nature Reserve. Simao, Yunnan. was reported. The floristic composition. forest profile, physiognomy and biogeography of the tropical rain forest were discussed. The tropical rain forest is similar to the typical rain forests in tropical SE Asia in floristic composition. forest profile and Physiognomy, and it is considered as a type of tropical seasonal rain forest form northern margin of tropical SE Asia. The tropical rain forest occurs in the limits of altitude and latitude in S Yunnan and is strongly affected by topography and local habitats. The flora of the forest is composed mainly by tropical floristic elements. especially the tropical Asian element and is of tropics in nature as well as a part of tropical Asian flora. Occurred at the montane habitats from northern margin of tropical Asia. the flora also shows conspicuous characters of the tropical margin and is transitional to the subtropical flora of SW China. The analysis to its floristic composition also implies that the tropical rain forest of Caiyanghe is a successional type and it was not existent in the region until later Tertiary when the tropical wet climate formed locally with the uplift of Himalayas.更多还原