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Effects of latitude gradient and seasonal variation on the community structure and biodiversity of commercially important crustaceans in the Yellow Sea and the northern East China Sea

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Marine Life Science & Technology 2020年第2期2卷 146-154页

作者： Qiang Wu Xiujuan Shan Xianshi Jin Yue Jin Fangqun Dai Yongqiang Shi Lisha Guan Tao Zuo Jianqiang Sun Key Laboratory for Sustainable Development of Marine Fisheries Ministry of AgricultureShandong Provincial Key Laboratory for Fishery Resources and Eco-environmentYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

To evaluate the spatio-temporal variations in the community structure and biodiversity of commercially important crustaceans in the Yellow Sea and the northern East China Sea(NECS),the seasonal and regional changes in species composition,biomass structure,biodiversity and distribution of commercially important species were analyzed using bottom trawl survey data during *** results showed that the latitudinal gradient was obvious in species richness,dominant species and *** indices of biodiversity increased with the decreasing *** the sampling sites shifted south by one latitudinal degree,Margalefs richness index(D),Pielou's evenness index(J')and Shannon-Wiener diversity index(H')increased by 0.***.0.03 and 0.09,*** biomass proportion of the cold-temperate species represented by Crangon affinis declined with the decreasing latitude,and the warm-temperate species represented by Ovalipes punctatus and Portunus trituberculatus in *** of the growth regulatio n of crustaceans and the fishing moratorium,the biomass of commercially important crustaceans in the Yellow Sea and NECS was highest in October and August,*** had a more significant influence on H'of commercially important crustaceans than other environmental factors(including zooplankton density,sea bottom temperature and water depth).Overall,the results of this study contribute to a better understanding of community dynamics of crustaceans in the Yellow Sea and NECS,and provide evidence to verify the latitudinal gradient theory in biodiversity.

关键词： latitude gradient Seasonal variations Crustacean community Biodiversity Yellow Sea and northern East China Sea

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