Seasonal and spatial comparisons of microzooplankton grazing and phytoplankton growth in the Bohai Bay, China

Frontiers in Marine Science

Marine Science

Yuyao Song¹  Guodong Zhang¹  Yujian Wen¹  Guicheng Zhang¹  Jun Sun² 

[1] Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, China;Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin, China;Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology, Tianjin, China;Research Centre for Indian Ocean Ecosystem, Tianjin University of Science and Technology, Tianjin, China;Institute for Advance Marine Research, China University of Geoscience, Guangzhou, China;College of Marine Science and Technology, China University of Geosciences (Wuhan), Wuhan, China;

关键词: dilution technique;    phytoplankton growth;    microzooplankton grazing;    phytoplankton community;    the Bohai Bay;   

DOI  :  10.3389/fmars.2023.1190677

 received in 2023-03-21, accepted in 2023-07-17,  发布年份 2023

来源: Frontiers

【 摘 要 】

The dilution experiment technique was used in two cruises in July-August (summer) and October-November (autumn) 2020, with a total of 14 stations. The grazing impact of microzooplankton on phytoplankton in the interior of Bohai Bay was comprehensively investigated. We compared phytoplankton growth rates (μ0) and microzooplankton grazing rates (m) spatially (distance between experimental stations and shore far vs. near) and seasonally (summer vs. autumn). Both m and μ0 values were significantly higher in summer than in autumn, and the phytoplankton growth rate μ0 was positively correlated to temperature. Offshore stations showed higher values. There is no significant spatial and seasonal differences in the ratio of microzooplankton grazing rate and phytoplankton growth rate (m/μ0) indicating that daily consumption of primary production by microzooplankton was similar in the two seasons. Therefore, our research showed a close coupling between microzooplankton grazing with phytoplankton growth in the Bohai Bay.

【 授权许可】

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Copyright © 2023 Wen, Zhang, Song, Zhang and Sun