Thirty years of change:Assessing the dynamics of fish communities in Daya Bay,a semi-enclosed coastal ecosystem of the South China sea  

作　　者：Jinfa Zhao Shengao Chen Chunhou Li Teng Wang Feiyan Du Dianrong Sun Xuehui Wang Juan Shi Yayuan Xiao Yong Liu 

机构地区：[1]Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization,Ministry of Agriculture and Rural Affairs,South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou,510300,PR China [2]Tarim University,Alar,Xinjiang Uygur Autonomous Region Institution/School:Tarim University College of Life Science and Technology/Tarim Research Center of Rare Fishes,Alar,843300,PR China [3]Scientific Observation and Research Station of Xisha Island Reef Fishery Ecosystem of Hainan Province/Key Laboratory of Efficient Utilization and Processing of Marine Fishery Resources of Hainan Province/Sanya Tropical Fisheries Research Institute,Sanya,572018,Hainan,PR China [4]Guangdong Provincial Key Laboratory of Fishery Ecology Environment,Guangzhou,510300,PR China [5]Observation and Research Station of Pearl River Estuary Ecosystem,Guangdong Province,Guangzhou,510300,PR China

出　　处：《Water Biology and Security》2024年第3期19-30,共12页水生生物与安全（英文）

基　　金：funded by Fundamental and Applied Fundamental Research Major Program of Guangdong Province(2019B030302004-05);Science and Technology Planning Project of Guangdong Province(2019B121201001);Central Public-interest Scientific Institution Basal Research Fund,CAFS(2023TD16);Central Public-interest Scientific Institution Basal Research Fund,South China Sea Fisheries Research Institute,CAFS(2021SD04 and 2019TS28);Financial Fund of the Ministry of Agriculture and Rural Affairs,P.R.of China(NFZX2021).

摘　　要：Daya Bay is a semi-enclosed bay in the South China Sea which is a coastal ecosystem with significant ecological and economic value that is subjected to a variety of anthropogenic disturbances.However,long-term variation in fish community structure in this Bay remains uncertain.In this study,we aimed to explore the changing characteristics of fish species composition and community structure in Daya Bay during the past 30 years using data from 1989 to 2021 from bottom trawl surveys and historical literature data.As of now,a total of 544 species of fish have been identified in the Bay,belonging to 24 orders and 125 families.The structure of the fish community in the bay has changed over time.Firstly,there has been a clear decrease in the number of species and biomass of large fish.Secondly,the number of fish constituent orders and families has decreased.Moreover,both the average taxonomic distinctness and variation in taxonomic distinctness decreased from 1989 to 2021.Thirdly,there is low similarity among fishes at different time phases and distinct changes in the composition of dominant species.Present results indicate that the fish community structure in Daya Bay has tended to reflect a decline in diversity,shifts in composition,and shrinking of fish body size in the past 30 years.This study improves our understanding of fish species composition and its drivers over time in Daya Bay,providing important knowledge to support the protection and restoration of this ecosystem and the important ecosystem services it provides.

关 键 词：OVERFISHING Anthropogenic disturbances Shrinking of body size Community succession 

分 类 号：S93[农业科学—渔业资源] Q178[农业科学—水产科学]