Comparative Analysis of Total and Size-Fractionated Chlorophyll a in the Yellow Sea and Western Pacific
文献类型： 外文期刊
作者： Wei, Yuqiu 1 ; Cui, Zhengguo 1 ; Wang, Xingzhou 3 ; Teng, Guangliang 1 ; Qu, Keming 1 ; Sun, Jun 3 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow SeaFisheries Res Inst, Key Lab Sustainable Dev Marine Fisheries, Minist Agr & Rural Affairs, Qingdao, Peoples R China
2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao, Peoples R China
3.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin, Peoples R China
4.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan, Peoples R China
关键词： phytoplankton; chlorophyll a; size-fractionated filtration; Yellow Sea; Western Pacific
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）
ISSN：
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Measurements of different size-fractionated chlorophyll a concentrations (Chl a) of phytoplankton assemblages in situ are vital for advancing our understanding of the phytoplankton size structure and thus the marine biogeochemical cycle. In the present study, we thus made a comparative analysis of total and size-fractionated Chl a in the Yellow Sea (YS) and Western Pacific (WP). Our results suggest that the total Chl a was highly variable in the YS (averaging ~1.02 mu g L-1) and was generally 3-4-fold more than that in the WP (averaging ~0.30 mu g L-1). The pico-sized Chl a had a significant contribution to total Chl a in the WP (range 75-88%), while the average contributions of the nano-sized and pico-sized Chl a to total Chl a in the YS were 47 and 38%, respectively, suggesting that a majority of the total Chl a in the YS was associated with nano- and picophytoplankton. Moreover, we applied the generalized additive models (GAMs) to explore the relationships between the total Chl a and that contained in each of the three size classes. These GAMs relationships suggested a continuum from picophytoplankton dominated waters to large phytoplankton (cells> 2 mu m) domination with increasing Chl a. Finally, we made a comparison of the total Chl a obtained with GF/F filters and that measured from size-fractionated filtration and revealed that their corresponding concentrations are in good agreement, indicating the size-fractionated filtration had no effect on total Chl a determination.
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