Abstract: This paper deals with the impacts of the alien invasive plants on biodiversity in longitudinal range-gorge region of Southwest China. The longitudinal range-gorge region of Southwest China is a critical region for reserving biodiversity
and now this region has become a highly endangered region with more than 70 species of alien invasive plants. Among these invasive plants, Ageratina adenophora ( Eupatorium adenophorum), Chromolaena odorata ( Eupatorium odoratum), and Tithonia diversifolia are severely imperiling this region . The structure and functions of ecosystems in this region are badly destroyed with the consequences that, the native species are in the face of extinction, and that agricultural producers, animal husbandry , and forestry activities or even the ecological security are in danger. The damage of alien invasive plants in this region led to a great attention in our country . It is of great practical significance and scientific value to make a comprehensive study of the alien invasive plants of this region, to discover their principles of activity, to slow down their imperiling speed, to wipe out them from this region, and eventually to restore the ecological equilibrium. This paper gives a detailed description of the impacts of the alien invasive plants on the plants species diversity, plants community
diversity, ecosystem diversity, agricultural producers, animal husbandry, and forestry. At the end, the authors suggested several solutions to control and wipe out the alien invasive plants.

Key words: Biodiversity

摘要： 论述中国西南纵向岭谷区外来入侵植物对生物多样性的影响。中国西南纵向岭谷区是我国生物多样性保护的关键地区。目前, 该区域已成为外来植物入侵的重灾区, 外来入侵植物种类多达70 余种, 其中, 紫茎泽兰Ageratina adenophora ( Eupatorium adenophorum)、飞机草Chromolaena odorata ( Eupatorium odoratum) 和肿柄菊Tithonia diversifolia 等在该区域危害严重, 该区域的生态系统的结构与功能遭受破坏, 本地物种面临灭绝, 农、林、牧生产乃至区域的生态安全受到威胁。该区域的外来入侵植物的危害居全国之冠。研究该区域的外来入侵植物, 揭示其危害规律, 遏制其危害速度, 最终清除该区域的外来入侵植物, 恢复该区域的生态平衡, 具有十分重要的现实意义和科学价值。文中详细论述了外来入侵植物对植物物种多样性、植
物群落多样性、生态系统多样性、农牧业及林业的影响, 最后指出消除和控制外来入侵植物的途径。

关键词: 生物多样性, 外来入侵植物, 紫茎泽兰, 飞机草, 肿柄菊, 云南, 中国西南纵向岭谷区FONT