RT journal article
T1 Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes
A1 Reithmaier, Gloria M. S.
A1 Cabral, Alex
A1 Akhand, Anirban
A1 Bogard, Matthew J.
A1 Borges, Alberto V.
A1 Bouillon, Steven
A1 Burdige, David J.
A1 Call, Mitchel
A1 Chen, Nengwang
A1 Chen, Xiaogang
A1 Cotovicz, Luiz C.
A1 Eagle, Meagan J.
A1 Kristensen, Erik
A1 Kroeger, Kevin D.
A1 Lu, Zeyang
A1 Maher, Damien T.
A1 Pérez Lloréns, José Lucas
A1 Ray, Raghab
A1 Taillardat, Pierre
A1 Tamborski, Joseph J.
A1 Upstill-Goddard, Rob C.
A1 Wang, Faming
A1 Wang, Zhaohui Aleck
A1 Xiao, Kai
A1 Yau, Yvonne Y. Y.
A1 Santos, Isaac R.
A2 Biología
AB 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.
PB Nature Research
SN 2041-1723
YR 2023
FD 2023
LK http://hdl.handle.net/10498/31498
UL http://hdl.handle.net/10498/31498
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026