Response of Size-Fractionated Chlorophyll a to Upwelling and Kuroshio in Northeastern South China Sea
文献类型： 外文期刊
作者： Li, Danyang 1 ; Yang, Shuang 3 ; Wei, Yuqiu 4 ; Wang, Xingzhou 3 ; Mao, Yingjie 1 ; Guo, Congcong 3 ; Sun, Jun 1 ;
作者机构： 1.China Univ Geosci, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
2.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
3.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin 300457, Peoples R China
4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab Sustainable,Dev Marine Fisheries, Qingdao 266071, Peoples R China
关键词： chlorophyll a; phytoplankton; northeastern South China Sea; Kuroshio current; upwelling
期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.744； 五年影响因子：2.727 ）
ISSN：
年卷期： 2022 年 10 卷 6 期
页码：
收录情况： SCI
摘要： The variability of size-fractionated chlorophyll a (Chl a) biomass and related environmental variables was investigated in a survey conducted in the northeastern South China Sea (NESCS), to assess their responses to upwelling, Kuroshio, and nutrients in the summer of 2017. The depth-weighted total Chl a concentration varied from 0.057 to 0.496 mu g/L. The contribution of size-fractionated Chl a to total Chl a biomass was determined, with the contributions of pico-Chl a (0.2-2 mu m), nano-Chl a (2-20 mu m), and micro-Chl a (>20 mu m) found to be 52.87%, 38.54%, and 8.59%, respectively. We found that nano-Chl a contributes more to total-Chl a than pico-Chl a in areas affected by upwelling. In addition, the results indicated an upward shift in the deep chlorophyll maximum (DCM) content in the upwelling area and the Kuroshio intrusion area. The Chl a biomass was increased in the physical process. Overall, correlation analysis showed that environmental variables (temperature, salinity, phosphate, silicate, nitrate, nitrite, ammonium) significantly influenced the phytoplankton biomass. However, physical processes determined the changes in environmental variables, with upwelling and Kuroshio being the main factors regulating the distribution of Chl a.
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