Microzooplankton Grazing Rates and Viral Lysis Rates on Prokaryotes in Summer Sanya Bay*

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  • 1.      Key Laboratory of Tropical Marine Bio-resources and Ecology,South China Sea Institute of Oceanology, Chinese  Acedemy of Sciences,Guangzhou 510301,China;

    2.      University of Chinese Academy of Sciences, Beijing 100049,China;

    3.      Marine Environmental Engineering Center, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China


Received date: 2025-01-07

  Revised date: 2025-03-05

  Accepted date: 2025-03-18

  Online published: 2025-03-18

Supported by

 National Natural Science Foundation of China (42176116,42306134,41576126); Science & Technology Fundamental Resources Investigation Program (2023FY100803); Natural Science Foundation of Guangdong Province (2017A030306020); Rising Star Foundation of the South China Sea Institute of Oceanology (NHXX2019ST0101)

Abstract

During a month-long study in Sanya Bay, we examined the temporal dynamics of zooplankton grazing and viral lysis rates in prokaryotes. Findings revealed that prokaryotic growth rate (μ) surpassed the combined rates of viral lysis (mv) and zooplankton grazing (mg), averaging 2.69±0.66d-1 (1.61~3.87d-1). The viral lysis rate averaged 0.77±0.34d-1 (0.31~1.21d-1), while the zooplankton grazing rate averaged 0.83±0.58d-1 (0.12~1.88d-1). Viral lysis carbon (Ci(v)) and zooplankton grazing carbon (Ci(g)) in prokaryotes were equivalent, each approximating 106 fg·C·mL-1. Negative correlations were observed between viral lysis rate and zooplankton grazing rate, as well as between viral lysis percentage (Pi(v)) and zooplankton grazing percentage (Pi(g)). Conversely, a significant positive correlation was noted between viral lysis carbon and zooplankton grazing carbon. Viral lysis and microzooplankton grazing exhibited substantial variability over the study period, with both processes contributing equally to prokaryotic mortality, highlighting their significance in prokaryotic carbon flux.

Cite this article

LI Chunshan ZHANG Jiandong LONG Chao LONG Lijuan HUANG Sijun . Microzooplankton Grazing Rates and Viral Lysis Rates on Prokaryotes in Summer Sanya Bay*[J]. Journal of Tropical Oceanography, 0 : 1 . DOI: 10.11978/2025006

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