Distribution pattern of macrobenthic assemblages along a salinity gradient in the Hangzhou Bay and its adjacent waters

作     者：Runxuan Yan Xiaobo Wang Songyao Peng Qingxi Han Runxuan Yan;Xiaobo Wang;Songyao Peng;Qingxi Han

作者机构：School of Marine SciencesNingbo UniversityNingbo 315211China Marine Environmental Monitoring Center of NingboMinistry of Natural ResourcesNingbo 315012China Pearl River Water Resources Research InstituteGuangzhou 510611China College of OceanographyHohai UniversityNanjing 210098China Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Yuzhi Environmental Technology(Zhejiang)Co.Ltd.Ningbo 315199China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2023年第42卷第9期

页      面：79-89页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071004[理学-水生生物学] 

基　　金：The National Natural Science Foundation of China under contract Nos 42076156 and 41676139 the K.C. Wong Magna Fund in Ningbo University 

主　　题：macrobenthos dominant species functional groups environmental disturbances 

摘      要：It is widely acknowledged that the distribution of macrobenthos is affected by salinity, but the degree of influence varies in different areas. To explore the distribution pattern of macrobenthic assemblages in the Hangzhou Bay,12 stations were sampled to collect macrobenthos and the corresponding bottom water. Changes in the general characteristics of macrobenthos along the salinity gradient in the Hangzhou Bay and its adjacent waters were considered. Three dominant species were identified, including the polychaetes Sternaspis chinensis, the crustacea Oratosquilla oratoria and the echinoderm Ophiuroglypha kinbergi. And the macrobenthic assemblages showed a zonal distribution along with the salinity change. The correlation analyses showed that salinity, depth,temperature, suspended solids and dissolved oxygen had concurrent significant correlations with carnivorous group, Margalef species richness(d), Brillouin index(H) and Shannon-Wiener diversity index(H ). In light of the strong correlation between salinity and Changjiang River diluted water, which produces considerable disturbances by freshwater inflows, the deposition of suspended solids and the resuspension of seabed sediments,the combined environmental disturbances, instead of salinity alone, should be adopted to explain the zonation distribution pattern of macrobenthic assemblages.