Phytoplankton carbon biomass: Insights from the eastern Indian Ocean

doi:10.1016/j.dsr.2023.104190

	Phytoplankton carbon biomass: Insights from the eastern Indian Ocean
	Guo, Shujin 1,2,3; Wang, Feng1,4 ; Liang, Junhua 1; Zhang, Kangning1,4 ; Sun, Xiaoxia1,2,3,4,5
	2023-12-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	202 页码:13
通讯作者	Sun, Xiaoxia(xsun@qdio.ac.cn)
摘要	The study of phytoplankton carbon biomass is limited but has the potential to provide important insights into several oceanographic processes, such as the vertical carbon export and yield from the oceanic food web. In this study, we estimated the carbon biomass of the whole phytoplankton community in the eastern Indian Ocean (EIO) during spring of 2021 using flow cytometry and microscopy. We also examined the effect of physicochemical parameters on the spatial distribution of phytoplankton carbon biomass (phytoplankton-C). In the EIO, the range of phytoplankton-C was between 0.03 and 33.96 mu g C L-1, with picophytoplankton (<= 2 mu m) accounting for 92.41 +/- 8.95% and 89.06 +/- 13.21% of the total phytoplankton-C in the surface and deep chlorophyll maximum (DCM) layer, respectively. Among various phytoplankton groups, Prochlorococcus and picoeukaryotes accounted for a major part of the phytoplankton-C in the EIO, contributing (57 +/- 12%) and (25 +/- 7%) to the depth-integrated carbon biomass, respectively. This was followed by Synechococcus (6 +/- 4%), diatoms (6 +/- 4%) and dinoflagellates (3 +/- 1%). Phytoplankton-C exhibited significant variations in both horizontal and vertical distribution within the study area. Horizontally, the distribution of phytoplankton-C was markedly influenced by physical events in the EIO, such as freshwater inputs in the Bay of Bengal, Wyrtki Jet at the Equator and Southern Equatorial Current in the southern EIO. Vertically, different phytoplankton groups exhibited varying distribution patterns in carbon biomass with increasing depths, primarily due to their diverse responses to the vertical variation of irradiance and nutrients in the water column. The total phytoplankton-C in the surface layer (9.56 +/- 3.01 mu g C L-1) and the DCM layer (9.07 +/- 3.75 mu g C L-1) did not show a significant difference between each other (t-test, p > 0.1, n = 42), indicating that DCM didn't correspond to a phytoplankton-C maximum but rather a physiological adaptation of C: Chl a ratios of phytoplankton cells in the EIO. Therefore, vertical profiles of Chl a should be interpreted with caution when establishing their ecological significance in the study area. The carbon biomass of the entire phytoplankton community in the EIO was reported in this study, which could enhance our understanding of the contribution of different phytoplankton groups to the carbon pool and their role in the biogeochemical cycle in the EIO.
关键词	Phytoplankton carbon Physic-chemical parameters Picophytoplankton Utermo center dot hl phytoplankton Chl a ratio Deep chlorophyll maximum Eastern Indian Ocean
DOI	10.1016/j.dsr.2023.104190
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; National Natural Science Foundation of China[32371619] ; International Partnership Program of Chinese Academy of Sciences[133137KYSB20200002] ; International Partnership Program of Chinese Academy of Sciences[121311KYSB20190029] ; Taishan Scholar Project[NORC2021-10] ; NSFC Shiptime Sharing Project[42049910]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001107001500001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	TO-CHLOROPHYLL RATIO ; SEASONAL VARIABILITY ; SIZE-STRUCTURE ; GROWTH-RATE ; ATLANTIC ; SEA ; SURFACE ; BAY ; PHOTOACCLIMATION ; BIOVOLUME
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183928
专题	海洋生态与环境科学重点实验室
通讯作者	Sun, Xiaoxia
作者单位	1.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China 2.Laoshan Lab, Marine Ecol & Environm Sci Lab, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, 7 Nanhai Rd, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Guo, Shujin,Wang, Feng,Liang, Junhua,et al. Phytoplankton carbon biomass: Insights from the eastern Indian Ocean[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,202:13.
APA	Guo, Shujin,Wang, Feng,Liang, Junhua,Zhang, Kangning,&Sun, Xiaoxia.(2023).Phytoplankton carbon biomass: Insights from the eastern Indian Ocean.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,202,13.
MLA	Guo, Shujin,et al."Phytoplankton carbon biomass: Insights from the eastern Indian Ocean".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 202(2023):13.

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