Plankton respiration in the northern South China Sea during summer and winter

ZENG Xiangxi; HAO Qiang; ZHOU Guangdong; LE Fengfeng; LIU Chenggang; ZHOU Wenli

doi:10.1007/s13131-018-1213-5

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Article Navigation > Acta Oceanologica Sinica > 2018 > 37(8): 74-83

ZENG Xiangxi, HAO Qiang, ZHOU Guangdong, LE Fengfeng, LIU Chenggang, ZHOU Wenli. Plankton respiration in the northern South China Sea during summer and winter[J]. Acta Oceanologica Sinica, 2018, 37(8): 74-83. doi: 10.1007/s13131-018-1213-5

Citation:

ZENG Xiangxi, HAO Qiang, ZHOU Guangdong, LE Fengfeng, LIU Chenggang, ZHOU Wenli. Plankton respiration in the northern South China Sea during summer and winter[J]. Acta Oceanologica Sinica, 2018, 37(8): 74-83. doi: 10.1007/s13131-018-1213-5

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Plankton respiration in the northern South China Sea during summer and winter

doi: 10.1007/s13131-018-1213-5

1.
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;Center for Marine Ranching Engineering Science Research of Tianjin, Tianjin Bohai Sea Fisheries Research Institute, Tianjin 300457, China;Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China
2.
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China
3.
Key Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
4.
Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China

Received Date: 2017-01-21
Rev Recd Date: 2017-07-18

Abstract

Abstract

Plankton respiration is an important part of the carbon cycle and significantly affects the balance of autotrophic assimilation and heterotrophic production in oceanic ecosystems. In the present study, respiration rates of the euphotic zone plankton community (CR_eu), size fractionated chlorophyll a concentration (Chl a), bacterial abundance (BAC), and dissolved oxygen concentration (DO) were investigated during winter and summer in the northern South China Sea (nSCS). The results show that there were obvious spatial and temporal variations in CR_eu in the nSCS (ranging from 0.03 to 1.10 μmol/(L·h)), CR_eu in winter ((0.53±0.27) μmol/(L·h)) was two times higher than that in summer ((0.26±0.20) μmol/(L·h)), and decreased gradually from the coastal zone to the open sea. The distribution of CR_eu was affected by coupled physical-chemical-biological processes, driven by monsoon events. The results also show that CR_eu was positively correlated with Chl a, BAC, and DO, and that BAC contributed the highest CR_eu variability. Furthermore, the results of the stepwise multiple linear regression suggest that bacteria and phytoplankton were the dominant factors in determining CR_eu (R²=0.82, p<0.05) in the nSCS. Based on this relationship, we estimated the integrated water column respiration rate (CR_int) within 100 m of the investigated area, and found that the relationship between the biomass of the plankton community and respiration may be nonlinear in the water column.
- northern South China Sea,
- plankton community,
- respiration,
- phytoplankton,
- bacteria

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References(14)

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