A global assessment of mangrove soil organic carbon sources and implications for blue carbon credit.

Autor: Zhang J; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.; University of Chinese Academy of Sciences, Beijing, P.R. China., Gan S; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China., Yang P; Chinese Research Academy of Environmental Sciences, Beijing, P.R. China., Zhou J; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.; University of Chinese Academy of Sciences, Beijing, P.R. China., Huang X; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.; University of Chinese Academy of Sciences, Beijing, P.R. China., Chen H; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.; University of Chinese Academy of Sciences, Beijing, P.R. China., He H; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China.; University of Chinese Academy of Sciences, Beijing, P.R. China., Saintilan N; School of Natural Sciences, Macquarie University, Sydney, NSW, Australia., Sanders CJ; National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, Coffs Harbour, NSW, Australia., Wang F; Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation and Management of Degraded Ecosystems, the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, P.R. China. wangfm@scbg.ac.cn.; School of Ecology, Hainan University, Haikou, P.R. China. wangfm@scbg.ac.cn.; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, P.R. China. wangfm@scbg.ac.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Oct 18; Vol. 15 (1), pp. 8994. Date of Electronic Publication: 2024 Oct 18.
DOI: 10.1038/s41467-024-53413-z
Abstrakt: Mangroves can retain both autochthonous and allochthonous marine and/or terrestrial organic carbon (OC) in sediments. Accurate quantification of these OC sources is essential for the proper allocation of blue C credits. Here, we conduct a global-scale analysis of sediments autochthonous and allochthonous OC contributions in estuarine and marine mangroves using stable isotopes. Globally, mangrove-derived autochthonous OC was the main contributor to estuarine and marine mangrove top-meter soil organic carbon (SOC) (49% and 62%, respectively). Less marine allochthonous OC (21%) was deposited than terrestrial allochthonous OC (30%) in estuarine mangrove sediments. Estuarine mangroves accumulated more SOC in sediments than marine mangroves (282 ± 8.1 Mg C ha -1 and 250 ± 5.0 Mg C ha -1 , respectively), primarily due to the additional terrestrial OC inputs. Globally, marine mangroves held 67% of the total mangrove SOC, reaching 3025 ± 345 Tg C, while 1502 ± 154 Tg C was stored in estuarine mangrove sediments. The findings emphasize the substantial influence of coastal environmental settings on OC contributions, underlining the necessity of accurate OC source quantification for the effective allocation of blue carbon credits.
(© 2024. The Author(s).)
Databáze: MEDLINE
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