Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes

被引：60

作者：

Reithmaier, Gloria M. S. ^{[1
]}

Cabral, Alex ^{[1
]}

Akhand, Anirban ^{[2
,3
]}

Bogard, Matthew J. ^{[4
]}

Borges, Alberto V. ^{[5
]}

Bouillon, Steven ^{[6
]}

Burdige, David J. ^{[7
]}

Call, Mitchel ^{[8
]}

Chen, Nengwang ^{[9
]}

Chen, Xiaogang ^{[10
]}

Cotovicz Jr, Luiz C. ^{[11
,12
]}

Eagle, Meagan J. ^{[13
]}

Kristensen, Erik ^{[14
]}

Kroeger, Kevin D. ^{[13
]}

Lu, Zeyang ^{[15
]}

Maher, Damien T. ^{[8
]}

Perez-Llorens, J. Lucas ^{[16
]}

Ray, Raghab ^{[17
]}

Taillardat, Pierre ^{[18
]}

Tamborski, Joseph J. ^{[7
]}

Upstill-Goddard, Rob C. ^{[19
]}

Wang, Faming ^{[20
]}

Wang, Zhaohui Aleck ^{[21
]}

Xiao, Kai ^{[22
]}

Yau, Yvonne Y. Y. ^{[1
]}

Santos, Isaac R. ^{[1
]}

机构：

[1] Univ Gothenburg, Dept Marine Sci, S-41319 Gothenburg, Sweden

[2] Hong Kong Univ Sci & Technol, Dept Ocean Sci, Kowloon, Hong Kong, Peoples R China

[3] Port & Airport Res Inst, Coastal & Estuarine Environm Res Grp, 3-1-1 Nagase, Yokosuka 2390826, Japan

[4] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB, Canada

[5] Univ Liege, Chem Oceanog Unit, B-4000 Liege, Belgium

[6] Dept Earth & Environm Sci, KU Leuven, B-3001 Leuven, Belgium

[7] Old Dominion Univ, Dept Ocean & Earth Sci, Norfolk, VA 23529 USA

[8] Southern Cross Univ, Fac Sci & Engn, Lismore, NSW 2480, Australia

[9] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China

[10] Westlake Univ, Sch Engn, Hangzhou 310024, Peoples R China

[11] Leibniz Inst Baltic Sea Res, Dept Marine Chem, Warnemunde, Germany

[12] Fed Univ Ceara UFC, Inst Marine Sci LABOMAR, Fortaleza, Brazil

[13] US Geol Survey, Woods Hole Coastal & Marine Sci Ctr, 384 Woods Hole Rd, Woods Hole, MA 02543 USA

[14] Univ Southern Denmark, Dept Biol, DK-5230 Odense, Denmark

[15] Xiamen Univ, Coll Environm & Ecol, Xiamen 361102, Peoples R China

[16] Univ Cadiz, Inst Univ Invest Marina INMAR, Puerto Real, Cadiz, Spain

[17] Univ Tokyo, Atmosphere & Ocean Res Inst, Tokyo, Japan

[18] Natl Univ Singapore, NUS Environm Res Inst, Singapore 117411, Singapore

[19] Newcastle Univ, Sch Nat & Environm Sci, Newcastle Upon Tyne NE1 7RU, England

[20] Chinese Acad Sci, Xiaoliang Res Stn Trop Coastal Ecosyst, Guangzhou 510650, Peoples R China

[21] Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA

[22] Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen, Peoples R China

来源：

NATURE COMMUNICATIONS | 2023年 / 14卷 / 01期

基金：

瑞典研究理事会;

关键词：

TIDAL CREEK; ACIDIFICATION; ALKALINITY; WATERS; EXPORT; ECOSYSTEMS; SEDIMENTS; DYNAMICS; FLUXES; RIVER;

D O I：

10.1038/s41467-023-44037-w

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Mangroves and saltmarshes are biogeochemical hotspots storing carbon in sediments and in the ocean following lateral carbon export (outwelling). Coastal seawater pH is modified by both uptake of anthropogenic carbon dioxide and natural biogeochemical processes, e.g., wetland inputs. Here, we investigate how mangroves and saltmarshes influence coastal carbonate chemistry and quantify the contribution of alkalinity and dissolved inorganic carbon (DIC) outwelling to blue carbon budgets. Observations from 45 mangroves and 16 saltmarshes worldwide revealed that >70% of intertidal wetlands export more DIC than alkalinity, potentially decreasing the pH of coastal waters. Porewater-derived DIC outwelling (81 +/- 47 mmol m(-2) d(-1) in mangroves and 57 +/- 104 mmol m(-2) d(-1) in saltmarshes) was the major term in blue carbon budgets. However, substantial amounts of fixed carbon remain unaccounted for. Concurrently, alkalinity outwelling was similar or higher than sediment carbon burial and is therefore a significant but often overlooked carbon sequestration mechanism.

引用

页数：8

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FRONTIERS IN MARINE SCIENCE, 2022, 9

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