天津近岸海域大型底栖动物摄食功能群特征及其与环境因子的关系

摄食功能群是指生态系统中食性相同的生物群落,研究摄食功能群有助于科学评估区域生态健康状况.基于2015年9月、2016年5月和2016年9月的天津近岸海域大型底栖动物调查数据,结合同步获取的环境因子,分析研究区大型底栖动物摄食功能群组成及其变化特征,探究大型底栖动物摄食功能群组成及变化的原因.结果表明,3个航次的大型底...

MACROZOOBENTHOS FUNCTIONAL FEEDING GROUPS AND ITS RELATIONSHIP WITH ENVIRONMENTAL FACTORS IN THE TIANJIN COASTAL AREA

The functional feeding group was the biotic community with the same feeding habits. It is useful for assessing the ecological health status scientifically in any natural system while studying on functional feeding groups. Based on macrozoobenthos samples collected from the Tianjin coastal area in September 2015, May 2016, and September 2016, combining with environmental parameters, macrozoobenthos functional feeding groups characteristics and its distribution were analyzed. Results showed that the macrozoobenthos community could be divided into five feeding groups, including carnivorous group (CA), detritivorous group (DE), omnivorous group (OM), and planktivorous group (PL) but without group herbivore (HE). Groups DE and CA displayed the largest proportion of community average richness and abundance in three voyages, but groups PL and OM displayed the smallest proportion. In the contrary, groups PL and OM displayed the largest proportion of community average biomass across three voyages. Using the Donggu channel in the Haihe River estuary as the boundary, the spatial distribution of each group species richness and density showed a higher value in the northern part and a lower one in the southern part. Cluster analyses indicated that the macrozoobenthos feeding groups composition of sampling sites in the Donggu channel was significantly different from other areas, which was in accordance with Multivariate Analysis of Variance (MANOVA) results of environmental parameters. Redundancy analysis (RDA) and MANOVA results showed that nutrients were the main environmental parameters affecting the macrozoobenthos feeding group composition. Compared with the previous study, no obvious change was observed on macrozoobenthos functional feeding group composition in the Tianjin coastal area. Therefore, to lay a solid foundation for the economic development of Beijing-Tianjin-Hebei integration, more efforts were needed to be paid on the marine ecological restoration in the Tianjin coastal area.