Zooplankton community structure,abundance and biovolume in Jiaozhou Bay and the adjacent coastal Yellow Sea during summers of 2005–2012:relationships with increasing water temperature  

作　　者：WANG Weicheng SUN Song ZHANG Fang SUN Xiaoxia ZHANG Guangtao 王卫成;孙松;张芳;孙晓霞;张光涛(Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Jiaozhou Bay Marine Ecosystem Research Station,Chinese Academy of Sciences;Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology)

机构地区：[1]Key Laboratory of Marine Ecology and Environmental Sciences,Institute of Oceanology,Chinese Academy of Sciences Qingdao 266071,China [2]Jiaozhou Bay Marine Ecosystem Research Station,Chinese Academy of Sciences,Qingdao 266071,China [3]University of ChineseAcademy of Sciences,Beijing 100049,China [4]Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2018年第5期1655-1670,共16页海洋湖沼学报（英文）

基　　金：Supported by the State Key Program of National Natural Science Foundation of China(No.41230963);the NSFC-Shandong Joint Fund for Marine Ecology and Environmental Sciences(No.U1606404);the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA11020305)to SUN Song

摘　　要：Zooplankton abundance, biovolume and taxonomic composition in Jiaozhou Bay and the adjacent coastal Yellow Sea were evaluated using ZooScan measurement of samples collected by net towing every August from 2005 to 2012. Zooplankton abundance and biovolume ranged from 1 938.5 to 24 800 ind./m^3 and 70.8 to 1 480.1 mm^3/m^3 in Jiaozhou Bay and 73.1 to 16 814.3 ind./m^3 and 19.6 to 640.7 mm^3/m^3 in the coastal Yellow Sea. Copepods were the most abundant group in both regions, followed by N octiluca scintillans and appendicularians in Jiaohzou Bay, and chaetognaths and N octiluca scintillans in adjacent coastal Yellow Sea. Over the study period, the most conspicuous hydrographic change was an increase in water temperature. Meanwhile, a general decrease in zooplankton abundance was observed, particularly in copepod populations. Based on redundancy analysis(RDA), the warming trend was the key environmental factor influencing to decrease of copepod abundance. The proportion of small-sized copepods increased while the mean size of all copepods decreased, in significant correlation with water temperature. Our results indicate that zooplankton, particularly copepods, are highly sensitive to change in water temperature, which is consistent with predicted impacts of warming on aquatic ectotherms. Due to their dominance in the zooplankton, the decline in copepod size and abundance could lead to an unfavourable decrease in energy availability for predators, particularly planktivorous fish.Zooplankton abundance, biovolume and taxonomic composition in Jiaozhou Bay and the adjacent coastal Yellow Sea were evaluated using ZooScan measurement of samples collected by net towing every August from 2005 to 2012. Zooplankton abundance and biovolume ranged from 1 938.5 to 24 800 ind./m^3 and 70.8 to 1 480.1 mm^3/m^3 in Jiaozhou Bay and 73.1 to 16 814.3 ind./m^3 and 19.6 to 640.7 mm^3/m^3 in the coastal Yellow Sea. Copepods were the most abundant group in both regions, followed by N octiluca scintillans and appendicularians in Jiaohzou Bay, and chaetognaths and N octiluca scintillans in adjacent coastal Yellow Sea. Over the study period, the most conspicuous hydrographic change was an increase in water temperature. Meanwhile, a general decrease in zooplankton abundance was observed, particularly in copepod populations. Based on redundancy analysis（RDA）, the warming trend was the key environmental factor influencing to decrease of copepod abundance. The proportion of small-sized copepods increased while the mean size of all copepods decreased, in significant correlation with water temperature. Our results indicate that zooplankton, particularly copepods, are highly sensitive to change in water temperature, which is consistent with predicted impacts of warming on aquatic ectotherms. Due to their dominance in the zooplankton, the decline in copepod size and abundance could lead to an unfavourable decrease in energy availability for predators, particularly planktivorous fish.

关 键 词：copepod ABUNDANCE body size ZooScan temperature northwestern Yellow Sea 

分 类 号：X55[环境科学与工程—环境工程] Q179.1[生物学—水生生物学]