Contribution of Carbon Fixation Toward Carbon Sink in the Ocean Twilight Zone

被引：10

作者：

Saxena, Himanshu ^{[1
,2
]}

Sahoo, Deepika ^{[1
,2
]}

Nazirahmed, Sipai ^{[1
]}

Rai, Deepak Kumar ^{[1
,2
]}

Khan, Mohammad Atif ^{[1
]}

Sharma, Niharika ^{[1
]}

Kumar, Sanjeev ^{[1
]}

Singh, Arvind ^{[1
]}

机构：

[1] Phys Res Lab, Ahmadabad, Gujarat, India

[2] Indian Inst Technol, Gandhinagar, India

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 18期

关键词：

carbon budget; chemosynthesis; oxygen minimum zone; Indian Ocean; Arabian Sea; OXYGEN MINIMUM ZONE; ANAMMOX BACTERIA; ORGANIC-MATTER; ARABIAN SEA; PRIMARY PRODUCTIVITY; NITROGEN LOSS; ARCHAEA; METHANE; DRIVEN; OXIDATION;

D O I：

10.1029/2022GL099044

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Dark carbon (C) fixation in the ocean twilight zone plays a crucial role toward C sink, but its potential has not been tested sufficiently in experiments. Here we analyzed dark C fixation in the twilight zone of the Arabian Sea along with the primary production measurements in the euphotic zone. The average dark C fixation rates in the suboxic oxygen minimum zone (OMZ) waters were higher than that in the hypoxic OMZ waters, which could be explained by the preferential existence of chemoautotrophic ammonium oxidizers and anammox bacteria owing to NO2- maxima in the suboxic OMZ waters. This study supports a previous hypothesis of significant contribution of dark C fixation to sinking C fluxes in the OMZ of the Arabian Sea. Extrapolation of the measured dark C fixation rates to the global ocean ranged up to 7.4 Pg C y(-1); amounting to similar to 15% of the global ocean primary production.

引用

页数：11

共 64 条

[1]

[Anonymous], 2021, document R2021b

[2] Significance of non-sinking particulate organic carbon and dark CO2 fixation to heterotrophic carbon demand in the mesopelagic northeast Atlantic [J].

Baltar, Federico ;

Aristegui, Javier ;

Sintes, Eva ;

Gasol, Josep M. ;

Reinthaler, Thomas ;

Herndl, Gerhard J. .

GEOPHYSICAL RESEARCH LETTERS, 2010, 37

[3] Primary productivity and its regulation in the Arabian Sea during 1995 [J].

Barber, RT ;

Marra, J ;

Bidigare, RC ;

Codispoti, LA ;

Halpern, D ;

Johnson, Z ;

Latasa, M ;

Goericke, R ;

Smith, SL .

DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2001, 48 (6-7) :1127-1172

[4] Climate-driven trends in contemporary ocean productivity [J].

Behrenfeld, Michael J. ;

O'Malley, Robert T. ;

Siegel, David A. ;

McClain, Charles R. ;

Sarmiento, Jorge L. ;

Feldman, Gene C. ;

Milligan, Allen J. ;

Falkowski, Paul G. ;

Letelier, Ricardo M. ;

Boss, Emmanuel S. .

NATURE, 2006, 444 (7120) :752-755

[5] Abundance and distribution of archaeal acetyl-CoA/propionyl-CoA carboxylase genes indicative for putatively chemoautotrophic Archaea in the tropical Atlantic's interior [J].

Bergauer, Kristin ;

Sintes, Eva ;

van Bleijswijk, Judith ;

Witte, Harry ;

Herndl, Gerhard J. .

FEMS MICROBIOLOGY ECOLOGY, 2013, 84 (03) :461-473

[6]

Boyd P., 2019, GESAMP REPORTS STUDI

[7] Declining oxygen in the global ocean and coastal waters [J].

Breitburg, Denise ;

Levin, Lisa A. ;

Oschlies, Andreas ;

Gregoire, Marilaure ;

Chavez, Francisco P. ;

Conley, Daniel J. ;

Garcon, Veronique ;

Gilbert, Denis ;

Gutierrez, Dimitri ;

Isensee, Kirsten ;

Jacinto, Gil S. ;

Limburg, Karin E. ;

Montes, Ivonne ;

Naqvi, S. W. A. ;

Pitcher, Grant C. ;

Rabalais, Nancy N. ;

Roman, Michael R. ;

Rose, Kenneth A. ;

Seibel, Brad A. ;

Telszewski, Maciej ;

Yasuhara, Moriaki ;

Zhang, Jing .

SCIENCE, 2018, 359 (6371) :46-+

[8] Denitrification exceeds anammox as a nitrogen loss pathway in the Arabian Sea oxygen minimum zone [J].

Bulow, Silvia E. ;

Rich, Jeremy J. ;

Naik, Hema S. ;

Pratihary, Anil K. ;

Ward, Bess B. .

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 2010, 57 (03) :384-393

[9] Assessing the apparent imbalance between geochemical and biochemical indicators of meso- and bathypelagic biological activity: What the @$#! is wrong with present calculations of carbon budgets? [J].

Burd, Adrian B. ;

Hansell, Dennis A. ;

Steinberg, Deborah K. ;

Anderson, Thomas R. ;

Aristegui, Javier ;

Baltar, Federico ;

Beaupre, Steven R. ;

Buesseler, Ken O. ;

DeHairs, Frank ;

Jackson, George A. ;

Kadko, David C. ;

Koppelmann, Rolf ;

Lampitt, Richard S. ;

Nagata, Toshi ;

Reinthaler, Thomas ;

Robinson, Carol ;

Robison, Bruce H. ;

Tamburini, Christian ;

Tanaka, Tsuneo .

DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 2010, 57 (16) :1557-1571

[10]

Chao L., 1974, STAT METHODS ANAL, P237

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