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Decadal variations in the community status of economically important invertebrates in the Bohai Sea

Acta Oceanologica Sinica 2019年第10期38卷 60-66页

作者： Qiang Wu Lisha Guan Zhongyi Li Xiujuan Shan Xianshi Jin Key Laboratory for Sustainable Development of Marine Fisheries Ministry of Agriculture/Shandong Provincial Key Laboratory for Fishery Resources and Eco-environmentYellow Sea Fisheries Research InstituteAcademy of Fishery SciencesQingdao 266071China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

With the decline of fish stocks,the proportions of economically important invertebrates like crustaceans and cephalopods have increased in the Bohai *** community structure and trophic level of economically important invertebrates were analyzed using the bottom trawl survey data collected by the Yellow Sea Fisheries Research Institute in the Bohai Sea in May and August of 1958–1959,1982,1992–1993,2004,2009 and 2015.A total of 37 species of economically important invertebrates,belonging to 5 orders,24 families,were *** biomass densities of economically important invertebrates in the Bohai Sea displayed an overall downward trend from 1982 to *** oratoria and Loligo *** the most dominant species in the past 30 years,the biomass proportion of *** increased gradually in both May and August from 1982 to ***,biodiversity indices of economically important invertebrates in the Bohai Sea appeared to decline from 1982 to 2004 and then increased in ***,the mean trophic level of economically important invertebrates declined from 1982 to 2004 and increased slightly in ***,although the proportions of invertebrates have increased,the biomass densities in the Bohai Sea have displayed an overall downward trend from 1982 to *** increases in the biodiversity and trophic level of economically important invertebrates after the 2000s,possibly benefit from stock enhancement projects implemented by governments at different levels and national fishery management measures such as the“double-control”of the total number and engine power of fishing vessels and summer moratorium of fishing.

关键词： decadal variations community structure trophic level economically important invertebrates bohaisea

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