Abstract
Samples were collected monthly from the sea area around Zhangzi Island, northern Yellow Sea, from July 2009 to June 2010. Vertical net towing was used to examine spatial and temporal variability in zooplankton abundance and biomass. Overall, Calanus sinicus and Saggita crassa were the dominant species found during the study period, while the amphipod Themisto gracilipes was dominant in winter and spring. Vast numbers of the ctenophore species of the genus Beroe were found in October and November. It was not possible to count them, but they constituted a large portion of the total zooplankton biomass. Zooplankton species diversity was highest in October, and species evenness was highest in April. Zooplankton abundance (non-jellyfish) and biomass were highest in June and lowest in August, with annual averages of 131.3 ind./m³ and 217.5 mg/m³, respectively. Water temperature may be responsible for the variations in zooplankton abundance and biomass. Beroe biomass was negatively correlated with other zooplankton abundance. Longterm investigations will be carried out to learn more about the influence of the environment on zooplankton assemblages.
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Acknowledgments
We thank Mr. ZANG Y. C., and the crew of the research vessel of the Dalian Zhangzidao Fishery Group Co. Ltd., for their support with field sampling. We also thank the Open Cruise of Chinese Offshore Oceanography Research by Institute of Oceanology, Chinese Academy of Science for giving us the sampling opportunity in December 2010.
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Supported by the National Science Foundation for Young Scientists of China (No. 41506153), the Special Fund for Strategic Pilot Technology Chinese Academy of Sciences A (No. XDA11020701), and the Open Fund of Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences
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Yin, J., Zhang, G., Li, C. et al. Community composition, abundance and biomass of zooplankton in Zhangzi Island waters, Northern Yellow Sea. Chin. J. Ocean. Limnol. 35, 1144–1151 (2017). https://doi.org/10.1007/s00343-017-6135-0
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DOI: https://doi.org/10.1007/s00343-017-6135-0