【摘要】 在金沙江干热河谷选择5个典型区段,开展样方调查.总结151个100 m~2(10 m×10 m)样方数据,发现群落净谱系亲缘关系指数结构发散,而净最近种间亲缘关系指数却呈现相反的结果.说明该区域植物群落脆弱且不稳定,群落中少数物种的丧失极有可能造成不可逆转的生态系统改变,而且物种竞争在群落构建中尤为关键.因此,在金沙江干热河谷植被恢复工作中,应注意对原有物种的保护与利用,且不应采取引进新物种的方式.更多还原

【Abstract】 Five typical sections in the Jinshajiang dry-hot valley in Yunnan Province,China were selected as the research object to analyze the data from 151 plots with the size of 100 m~2( 10 m × 10 m). The results showed that the majority of individual plant communities were phylogenetically over-dispersed based on the net relatedness index( NRI),yet the nearest taxon index( NTI)revealed the different features,which means that the plant communities are frangible and unstable. The loss of some species among them is likely to change ecosystem irreversibly and the species competition plays the important role in forming biocoenosis. Thus,the protection and application of the indigenous species should get more attention during the process of the vegetation restoration projects in the Jinshajiang dry-hot valley. Meanwhile,it’s not acceptable to introduce new species from other places.更多还原