关键词: 大港滨海湿地, 大型底栖动物, 种类组成, 多样性, the Dagang Coastal Wetland, macrobenthos, composition, biodiversity

Abstract: Macrobenthos investigation was canied out at eleven sampling stations in the Special Marine Resere of Tianjin Dagang Coastal Wetland in May of 2015. The results showed that 32 species of macrobenthos belonging to 7 phyla existed in the study area, among which 10 were Arthropoda,9 Mollusca, 5 Echinodermata and 8 the others. The range of density of macrobenthos in the investigated seawater was 20 ~19 610 ind/ m2, with an average of 1 872.27 ind/m 2, and the range of biomass was 17.75 ~ 11 213.50 g /m2, with an average of 1 241.69 g/m2. In particular, Musculus senhousei had been the predominant species in the investigated seawater. Mean Shannon - Weiner diversity index was 1.369, mean Margalef index was 0.546, and mean Pielou index was 0.614. The above community structure characters indicated that the status of the ecological environment in the Special Marine Reserve of Tianjin Dagang Coastal Wetland was poor.