互花米草入侵对盐城东台盐滩多毛纲动物多样性的影响及管理对策

Effects and management of Spartina alterniflora invasions on the diversity of Polychaeta of Dongtai salt marsh of Yancheng City

生物入侵是全球变化的重要组成部分,可能对入侵地造成严重的经济和生态后果,所以评价外来种入侵的生态后果是环境影响评价研究的重点。2005年8月-2006年4月通过对三个样地多毛类的物种丰富度、多样性指数、生物量的比较,得出优势度指数:闸口>互化米草盐滩>光滩;个体数:秋季>春季>冬季>夏季;丰富度:夏季>春季>秋季>冬季。并以米草属植物为例,分析了其对入侵地区江苏盐城东台梁垛滩涂的多毛纲动物的影响,结合国际上对米草属入侵种的管理策略,提出几点关于东台米草属植物管理的建议。

Biological invasions as a significant component of global environmental change, can result in serious economic and ecological consequences. Assessing the ecological impacts of invasive plants is one of the most important issues in the study of environmental impact assessment. Three different sample sites （lake gate sites, salt marsh with Spartina alterniflora and salt marsh without S. alterniflora） of Polychaeta were studies from August, 2005 to April, 2006. The comparison of species richness, species diversity index and biomass shows the dominance of lake gate sites is highest and that of salt marsh is lowest; the amount of individuals in autumn is larger than those in other seasons; the species richness in summer is highest in different seasons. This paper analyses the ecological effects of Spartina alterniflora on the Polychaeta at the tidal flat of Dongtai City and discusses strategies for controlling their further range expansion.