Journal article
Carbon and mercury burial in mangrove soils across an anthropogenic gradient
Estuarine, coastal and shelf science, Vol.318, pp.1-12
07/2025
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Abstract
Mangrove forests are important sinks for atmospheric CO2, resulting in organic-rich soils. However, increasing anthropogenic pressures may impact mangrove carbon sequestration. This study investigated organic carbon (OC) and mercury (Hg) stocks and accumulation rates in Brazilian mangroves under different degrees of anthropogenic influences. Organic carbon stocks and accumulation rates were 285 ± 33 Mg C ha−1 and 128 ± 96 g C m−2 yr−1, respectively. The OC stocks were not significantly (p > 0.05) different in the pristine and impacted mangroves. A high variability in OC accumulation rates across intertidal gradients underscores the importance of considering small-scale vertical variability when assessing blue carbon. The relationship between Hg and OC was stronger in impacted mangroves than the well-preserved sites. This study contributes to minimize uncertainties in South America OC stocks and accumulation rates and reveals links to Hg contamination. Understanding these dynamics enhances our comprehension of blue carbon ecosystems’ potential to store carbon and filter out pollution at the land-ocean interface.
Details
- Title
- Carbon and mercury burial in mangrove soils across an anthropogenic gradient
- Creators
- Antoniwal A. Jatobá-Junior - Universidade Federal da BahiaVanessa Hatje - Universidade Federal da BahiaPere Masque - Edith Cowan UniversityCarlos Eduardo de Rezende - Universidade Estadual do Norte FluminenseAlex Cabral - University of GothenburgYvonne Y.Y. Yau - University of GothenburgJoão Barreira - Universidade Federal do Rio de JaneiroGloria M.S. Reithmaier - University of GothenburgIsaac R. Santos - University of Gothenburg
- Publication Details
- Estuarine, coastal and shelf science, Vol.318, pp.1-12
- Publisher
- Elsevier Ltd; LONDON
- Grant note
- This work was supported by CNPq (441264/2017-4, 407297/2018-9) and the Swedish Research Council (2019–03930 and 2020-00457). The authors were sponsored by FAPESB (A.A.J.J.), CNPq (V.H., 302477/2022-5), FAPERJ (C.E.R, DCRT E-26/210.109/2022) and Australian Research Council LIEF Project (P.M., LE170100219).
- Identifiers
- 991013266689302368
- Copyright
- © 2025 Elsevier Ltd. All rights reserved, including those for text and data mining. AI training, and similar technologies.
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article