摘要
瑞丽市共有外来入侵植物42种,分析了其生长型、入侵生境和危害情况,依据入侵植物在当地的分布范围及在生境中的优势度,将其危害等级划分为3级,Ⅰ级危害植物9种,Ⅱ级8种,Ⅲ级25种,重点介绍了危害最严重的9种Ⅰ级外来入侵植物的危害情况,外来入侵植物的生态负面影响随着瑞丽自然生态系统的破坏、生物多样性的减少而增大,特别是对郁闭度小的人工林和人为干扰严重的生态系统影响较大;主要外来入侵植物的入侵随着海拔的上升其种类和数量相对减少,危害程度也减小;草本和藤本植物具有较强的入侵能力,乔木的入侵能力小,造成的危害程度也较小.
The growth form, habitats to be invaded and the harmfulness of 42 exotic invasive plant species in Ruili Municipality, Yunnan Province were analyzed based on the investigation. The 42 exotic invasive plant species were classified into 3 categories according to their harmfulness by their distribution range and their dominance in the habitats invaded. Individually, there were 9 species, 8 species and 25 species in Grade Ⅰ , Grade Ⅱ and Grade Ⅲ of the exotic invasive plants. The damage of the 9 species in Grade Ⅰwas discussed in details It was indicated by the investigation that the damage of the exotic invasive plants has been increased along with caused by the exotic invasive plants was even more evident on plantations with low coverage, and on the ecosystem suffered from severe artificial interference. It was also showed by the investigation that the species and number of the exotic invasive plants, and their harmfulness to the environment was reduced when the elevation increased. Among the exotic invasive plants, the herbaceous species and liana species showed stronger invading capacity than the woody arbor species, so the damage of the exotic invasive woody plant species was less severe.
出处
《西南林学院学报》
2007年第1期20-24,共5页
Journal of Southwest Forestry College
关键词
外来入侵植物
生物入侵
瑞丽
exotic invasive plants
bio - invasion
Ruili
