黄河三角洲外来入侵物种米草对滩涂底栖动物的影响

2005年5、8、10月份对黄河三角洲的无棣岔尖、东营市五号桩、小清河口米草分布区与对照区底栖动物作了调查,并与1980年同期历史调查资料相比较,结果表明:米草分布已导致调查区底栖动物群落组成和结构变化,经济贝类无分布,代之以小型螺类为优势种;但米草分布区底栖动物平均密度、生物量高于对照区,米草入侵排斥了大型底栖动物,降低了密度和生物量,而有利于小型螺类的分布.

Effect of alien invasive species Spartina Spp. on zoobenthos in shoal in Yellow River Delta

The investigation of zoobenthos was conducted in Spartina Spp. The distribution and control areas of Chajian are in Wudi county, Wuhaozhuang in Dongying City and Xiaoqing River Estuary in Yellow River Delta in May, Aug. And Oct. 2005. Comparing with the information during the same period in 1980, the community composition and structure of zoobenthos have been changed with the invasion of Spartina Spp. The small snails became the dominant species and the economic shellfishs disappeared. The average density and population of zoobenthos were higher in Spartina Spp. The distribution areas than that in the control. The invasion of Spartina anglica effects on the marofauna distribution and their density and the population was decreased, whereas effects on the small snails growing.