Abstract: Studies on the ecological environment pattern (EEP) in Mengyang Nature Reserve of Xishuangbanna with the application of ARC/INFO(VIEW) GISshowed that the EEPwas not a totality of all ecological factors, but produced by two major ecological factors, annual temperature and annual rainfall, and a visible indicator of natural vegetation. Three ecotope types with 20 ecotope individuals were identified, which were tropical seasonal rainforest ecotope type (with an area of 237.53 km² or 21% of total area), tropical mountainous rainforest ecotope type (126.93 km², or 11%), and subtropical monsoon evergreen broad leaved forest (764.88 km², or 68%). Amountain EEPsystem was developed, including eco district, landscape type and ecotope components. The EEPstudy revealed that approximately 59% of the tropical rain forests protected legally were not in the core area, which provided the necessity to alter the functional zones of the reserve.

Key words: Ecological environment pattern, Ecotope types, Mountain, Ecotope components, Xishuangbanna, salicylic acid, proliferation, Ulva prolifera, chlorophyll fluorescence, antioxidant