Diel vertical migration of mesozooplankton in the northern Yellow Sea  

作　　者：Ruping GE Hongju CHEN Guangxing LIU Yanzhong ZHU Qiang JIANG 

机构地区：[1]Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China [2]Marine Ecology and Environmental Science Laboratory,Pilot National Laboratory for Marine Science and Technology,Qingdao 266200,China [3]National Joint Research Center for Yangtze River Conservation,Chinese Research Academy of Environmental Sciences,Beijing 100012,China

出　　处：《Journal of Oceanology and Limnology》2021年第4期1373-1386,共14页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(No.42076146);the National Key Research and Development Program of China(No.2016YFA0601202);the Youth Talent Support Program of the Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.LMEES-YTSP-2018-02-02)。

摘　　要：The Yellow Sea Cold Water Mass(YSCWM),one of the most vital hydrological features of the Yellow Sea,causes a seasonal thermocline from spring to autumn.The diel vertical migration(DVM)of zooplankton is crucial to structural pelagic communities and food webs,and its patterns can be aff ected by thermocline depth and strength.Hence,we investigated zooplankton community succession and seasonal changes in zooplankton DVM at a fixed station in the YSCWM.Annual zooplankton community succession was aff ected by the forming and fading of the YSCWM.A total of 37 mesozooplankton taxa were recorded.The highest and lowest species numbers in autumn and spring were detected.The highest and lowest total densities were observed in autumn(14464.1 inds./m^(3))and winter(3115.4 inds./m^(3)),respectively.The DVM of the dominant species showed obvious seasonal variations.When the YSCWM was weak in spring and autumn,most species(e.g.Paracalanus parvus,Oithona similis,and Acartia bifilosa)stayed above the thermocline and vertically migrated into the upper layer.Calanus sinicus and Aidanosagitta crassa crossed the thermocline and vertically migrated.No species migrated through the stratification in summer,and all of the species were limited above(P.parvus and A.crassa)or below(C.sinicus and Centropages abdominalis)the thermocline.The YSCWM disappeared in winter,and zooplankton species were found throughout the water column.Thus,the existence of thermocline influenced the migration patterns of zooplankton.Cluster analyses showed that the existence of YSCWM resulted in significant differences between zooplankton communities above and below the thermocline.

关 键 词：MESOZOOPLANKTON diel vertical migration Yellow Sea Cold Water Mass North Yellow Sea THERMOCLINE 

分 类 号：P731[天文地球—海洋科学]