Assessment of macrobenthic community function and ecological quality after reclamation in the Changjiang(Yangtze)River Estuary wetland  

作　　者：Yinying Huang Yingying Huang Xinglin Du Yiming Li Jiangtao Tian Qiang Chen Youhui Huang Weiwei Lv Ying Yang Zhiquan Liu Yunlong Zhao 

机构地区：[1]State Key Laboratory of Estuarine and Coastal Research,East China Normal University,Shanghai 200241,China [2]School of Life Science,East China Normal University,Shanghai 200241,China [3]School of Life and Environmental Sciences,Hangzhou Normal University,Hangzhou 310018,China [4]Shanghai Runzhuang Agricultural Science and Technology Co.,Ltd,Shanghai 201400,China

出　　处：《Acta Oceanologica Sinica》2022年第11期96-107,共12页海洋学报（英文版）

基　　金：The Shanghai Chongming Dongtan Bird National Nature Reserve Resource Monitoring Project under contract No.CMDT-JC202101;the Shanghai Municipal Science and Technology Commission under contract No.19ZR1436900。

摘　　要：An ecological optimization project(semi-closed reclamation project)was implemented to control the invasion of Spartina alterniflora,and optimize the habitat of the Chongming Dongtan wetland,in the Changjiang(Yangtze)River Estuary.After project implementation,a macrobenthic ecological survey was conducted in a natural tidal flat and a semi-closed reclamation restoration area within the Chongming Dongtan wetland from 2019 to 2020.Compared with historical data before reclamation,findings showed that the groups,numbers,and species diversity of the macrobenthos increased significantly,and the ecological optimization project resulted in good ecological benefits.In addition,compared to the natural tidal flat,the number of collected macrobenthic phyla,and the macrobenthic density and biomass were significantly lower in the restoration area.Furthermore,the biodiversity index and functional redundancy of natural tidal flats were generally higher,indicating that the community composition and function of natural tidal flats were relatively more stable.Even though the species composition differed between a number of restoration areas and natural tidal flats,there was no difference in functional diversity,indicating that the effect of restoring ecological functions in restoration areas was optimal.Among them,the biodiversity and functional redundancy of Site S2 were significantly reduced,and the ecosystem function was extremely unstable.Habitat heterogeneity,vegetation community and decreasing salinity were the main factors that affected the ecological functions of macrobenthos.The ecological quality was also evaluated;the Transects N3 and N4 showed good quality.The overall ecological quality of the restoration area was generally high,but that of Site S2 was poor and that of Site S2E was merely good,which was mainly due to modifications of the ecological function of macrobenthos.It is suggested that reeds mowing and freshwater species release should be adopted in restoration areas to improve the community function and the envi

关 键 词：MACROBENTHOS ecological optimization project semi-closed reclamation community restoration functional diversity ecological health 

分 类 号：Q178[生物学—水生生物学]