互花米草入侵九段沙河口湿地对当地昆虫多样性的影响  

Effects of the invasive plant Spartina alterniflora on insect diversity in Jiuduansha wetlands in the Yangtze River Estuary

作　　者：高慧[1] 彭筱葳[1] 李博[1] 吴千红[1] 董慧琴[1] 

机构地区：[1]生物多样性与生态工程教育部重点实验室,复旦大学生物多样性科学研究所,上海200433

出　　处：《生物多样性》2006年第5期400-409,共10页Biodiversity Science

基　　金：上海科委重大项目(04DZ19301和04DZ19304)

摘　　要：为认识因互花米草(Spartinaalterniflora)入侵而给九段沙河口湿地昆虫多样性带来的影响,我们于2004年5月到2005年10月间用网捕和收割植株两种方法对3个典型植物群落中昆虫多样性作了连续调查。研究期间,共采集到昆虫11,300头。经鉴定为97个种,隶属于12目69科。互花米草群落中昆虫的物种数、个体数量以及Shannon-Wiener多样性指数均显著低于土著植物芦苇(Phragmitesaustralis)群落和海三棱藨草(Scirpusmariqueter)群落中的;而Simpson优势度指数较土著植物群落中高。聚类分析结果表明:芦苇与海三棱藨草群落中昆虫群落结构更为相似。互花米草的入侵将可能导致九段沙湿地昆虫多样性的降低和群落结构的改变。In order to examine the effects of the invasive plant Spartina alterniflora on insect diversity in Jiuduansha wetlands in the Yangtze River Estuary, we surveyed insects in monoculture stands of three species by net-sweeping and plant-harvesting methods from May 2004 to October 2005. A total of 11,300 insects were collected, belonging to 12 orders, 69 families and 97 species. We found that species number and Shannon-Wiener index of the insect community in Spartina alterniflora monoculture were significantly lower than those in the two native monocultures （Phragmites australis and Scirpus mariqueter）. However, Simpson＇s dominance index was higher in Spartina alterniflora monoculture. Cluster analysis indicated that, for both survey methods, the similarity of insect communities between Phragmites australis and Scirpus mari- queter was higher than that between Spartina alterniflora and the two native communities. We conclude that invasions of Spartina alterniflora might lead to reduction of insect diversity and alteration of insect community structure in Jiuduansha wetlands.

关 键 词：多样性 九段沙 昆虫 植物入侵 互花米草 

分 类 号：X171[环境科学与工程—环境科学]