Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica

Yuhong LI; Jun ZHAO; Dong LI; Jianming PAN; Jianfeng HE; Ji HU; Peisong YU; Cai ZHANG; Xufeng YANG; Haifeng ZHANG; Zhengbing HAN; Haisheng ZHANG

doi:10.1007/s00343-024-3198-6

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Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica

Ecology | Updated：2024-12-24

- Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica
- Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica
- 海洋湖沼学报(英文) 2024年42卷第6期页码：1895-1908
- Affiliations：
  
  1.Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou310012, China
  2.Antarctic Great Wall Ecology National Observation and Research Station, Polar Research Institute of China, Shanghai200136, China
  3.Key Laboratory for Polar Science, Ministry of Natural Resources, Polar Research Institute of China, Shanghai200136, China
  4.College of Environmental Science and Engineering, Tongji University, Shanghai200129, China
- Author bio：
  
  lidong@sio.org.cn
  jmpan@sio.org.cn
- Funds：
  
  the China’s National Polar Special Program “Impact and Response of Antarctic Seas to Climate Change” (Nos. IRASCC 01-01-02, IRASCC 02-02), the Scientific Research Fund of the Second Institute of Oceanography(JG2011;JG2211;JG2013;JG1805);the National Natural Science Foundation of China(42276255;41976228;41976227);the International Cooperation Key Project of Ministry of Science and Technology(2022YFE0136500)
- DOI：10.1007/s00343-024-3198-6
  中图分类号：
- 收稿：2023-09-28，
  
  纸质出版：2024-11-01
- Accepted：
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Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica[J]. 海洋湖沼学报(英文), 2024,42(6):1895-1908.

LI Yuhong,ZHAO Jun,LI Dong,et al.Research Paper Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica[J].Journal of Oceanology and Limnology,2024,42(06):1895-1908.
Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica[J]. 海洋湖沼学报(英文), 2024,42(6):1895-1908. DOI： 10.1007/s00343-024-3198-6.

LI Yuhong,ZHAO Jun,LI Dong,et al.Research Paper Factors controlling the phytoplankton crops, taxonomic composition, and particulate organic carbon stocks in the Cosmonaut Sea, East Antarctica[J].Journal of Oceanology and Limnology,2024,42(06):1895-1908. DOI： 10.1007/s00343-024-3198-6.

摘要

Abstract

The ecosystems in Southern Ocean (SO) are undergoing significant changes in the context of climate change. To identify environment-phytoplankton feedbacks in SO

seawater samples were collected in the Cosmonaut Sea (CS) during the 37

China Antarctic Research Expedition (Jan. 2021) (CHINARE-37) and subjected to analysis of particulate organic carbon (POC) and phytoplankton pigments. The remote sensing data

CHEMTAX community compositional modeling analysis

and physicochemical measurements were combined to explore the spatial variation of phytoplankton crops

taxonomic composition

and their environmental drivers. Historical phytoplankton community data from the area were also compared against those of this study to investigate inter-annual community differences and their potential causes. The column-integrated POC and chlorophyll-

(Chl-

) concentrations were 12.0±4.9 g/m

and 73.8±50.5 mg/m

respectively. The two most dominant taxa were haptophyte that are adapted to high Fe availability (Hapt-HiFe

mainly

Phaeocystis

antarctica

) and Diatoms-A (

Phaeodactylum

tricornutum

) that contributed to 33%±25% and 24%±14% to the total phytoplankton crops

respectively. Through cluster analysis

the study area was divided into two regions dominated by Hapt-HiFe and Diatoms-A

respectively. Spatially

Hapt-HiFe was mainly concentrated in the southwest coastal area that featured low temperatures

low salinity

and shallow euphotic zones. The coastal region southwest of the southern boundary of the Antarctic circumpolar current was experiencing a bloom of Hapt-HiFe during the study period that significantly contributed to the POC pool and Chl-

concentrations (

=0.46

0.01;

=0.42

0.01). Besides

the dominance of Hapt-HiFe in the CS suggests a high biological availability of dissolved Fe that is primarily associated with inputs from sea ice melt and upwellings.

关键词

Keywords

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