Based on macrobenthos collected from 18 stations in Hangzhou Bay from 2012 to 2019, the diversity and secondary production of macrobenthic communities in Hangzhou Bay were studied. The results showed that in total, 49 macrobenthic species were collected across the whole sampling period. Among the 16 dominant species determined, the polychaete Sternaspis chinensis and the bivalve Nucula faba were the dominant species across the entire sampling period. The macrobenthic community in Hangzhou Bay was at its lowest level of diversity and productivity in the Zhejiang coastal area. Correlation analysis of macrobenthic assemblages with environmental factors showed that bottom water salinity, dissolved oxygen (DO), transparency and chemical oxygen demand (COD) were the most important environmental factors affecting the macrobenthic community in Hangzhou Bay. Community parameters were negatively correlated with COD and DO but positively correlated with salinity and transparency; that is, with an increase in COD, the number of species, biomass and secondary production of the macrobenthic community decreased. However, DO was high enough for the survival and reproduction of macrobenthos, which truly reflects the frequent resuspension and deposition of sediment in Hangzhou Bay. Therefore, the macrobenthic assemblages in Hangzhou Bay were mainly controlled by severe sedimental disturbance and salinity gradients caused by freshwater input and strong ocean currents instead of water transparency and DO.

基于2012-2019年杭州湾18个站点采集的大型底栖动物，研究了杭州湾大型底栖动物群落的多样性和二次生产。结果表明，在整个采样期间，总共收集了 49 种大型底栖动物。在确定的16个优势种中，多毛纲Sternaspis chinensis和双壳类蚕豆是整个采样期间的优势物种。杭州湾大型底栖动物群落的多样性和生产力在浙江沿海地区处于最低水平。大型底栖动物组合与环境因素的相关分析表明，底水盐度、溶解氧（DO）、透明度和化学需氧量（COD）是影响杭州湾大型底栖动物群落的最重要环境​​因素。群落参数与COD和DO呈负相关，与盐度和透明度呈正相关；即随着COD的增加，大型底栖动物群落的物种数量、生物量和二次生产减少。然而，溶解氧对于大型底栖动物的生存和繁殖来说是足够高的，真实地反映了杭州湾沉积物频繁的再悬浮和沉积。因此，杭州湾大型底栖动物组合主要受淡水输入和强洋流引起的严重沉积扰动和盐度梯度控制，而不是水透明度和溶解氧。