云南湿地外来入侵植物特征研究

通过对云南湿地外来入侵植物的实地调查，确定云南湿地外来入侵植物共有70种，隶属于24科54属；来源于5大洲，其中来源于美洲的植物种类最多，共47种，占67.1％；入侵途径以人为传入为主，占95.7％。按水分生态类型分，以中生植物为主；按生活型分，以草本为主；按繁殖方式分，以种子繁殖为主，但以无性繁殖为主的入侵物种扩散速度快，危害性大。外来入侵植物在云南省16个地州（市）129个县（区）的湿地均有分布，其中全省范围分布的有43种，占61.5％。

Study on the Characteristics of Alien Invasive Plants of Wetland in Yunnan

Based on the field survey of invasive plant of wetland in Yunnan province , it was found out that there were 70 alien invasive plants belonging to 54 genera, 24 families.They originated from 5 continents, and 47 spe-cies （67.1%） were from the American Continent .The invasive route were mainly introduced by human , account-ing for 95.7 %, and most of alien invasive plants were hygrophytes according to water ecotype , and were herbs according to life-form and were seed propagation according to reproduction type .The alien invasive plants by asexual reproduction expanded very fast which caused higher damages .The alien invasive plants were widely distributed in the wetland of 129 counties of 16 prefectures or municipalities in Yunnan , among of which 43 species （ 61.5 %） were distributed in the whole province .