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

Reithmaier, Gloria M. S.; Cabral, Alex; Akhand, Anirban; Bogard, Matthew J.; Borges, Alberto V.; Bouillon, Steven; Burdige, David J.; Call, Mitchel; Chen, Nengwang; Chen, Xiaogang; Cotovicz, Luiz C.; Eagle, Meagan J.; Kristensen, Erik; Kroeger, Kevin D.; Lu, Zeyang; Maher, Damien T.; Pérez-Lloréns, J. Lucas; Ray, Raghab; Taillardat, Pierre; Tamborski, Joseph J.; Upstill-Goddard, Rob C.; Wang, Faming; Wang, Zhaohui Aleck; Xiao, Kai; Yau, Yvonne Y. Y.; Santos, Isaac R.

doi:10.1038/s41467-023-44037-w

Cited by 10 publications

(2 citation statements)

References 56 publications

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“…Therefore, the storage of soil organic carbon (SOC) assumes critical importance in regulating the carbon cycle and ameliorating climate change. Salt marsh wetlands, one of the most vital blue carbon systems, store a large amount of soil organic carbon because of the high net primary productivity and low soil organic matter decomposition rate [6,7]. According to research, the carbon burial rate in salt marshes is 30-50 times that of terrestrial forests, and 50%-90% of the carbon is stored in the soil [8].…”

Section: Introductionmentioning

confidence: 99%

Chronosequence Changes of Soil Organic Carbon in Salt Marshes under Artificial Intervention: A Case Study of Hengsha Island in the Yangtze Estuary

Zhang,

Sha,

et al. 2024

Sustainability

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Land formation seriously disturbs coastal salt marsh wetland ecosystems, while its influences on soil organic carbon (SOC) under chronosequences remain unclear. In this study, the impacts of the land formation time (from one to fourteen years) and soil properties on the chronosequences changes of SOC in the nascent wetland of Hengsha Island were investigated. The study results showed the following. (1) As the land-formation time extended, the SOC experienced a significant increase, tripling after a period of 14 years. The changes in SOC occurred mainly in the surface layer but not in the deep soil layer. Specifically, the surface layer’s average SOC reached 5.52 g·kg−1, markedly higher than 3.17 g·kg−1 in the deeper layer. (2) Spearman correlation analysis revealed that the ammonium nitrogen (NH4+-N), aboveground biomass (AGB), and soil water content (SWC) were positively correlated with the SOC. Methane emissions (CH4) and SOC exhibited a negative correlation. (3) The structural equation model (SEM) illustrated that the duration of soil deformation directly impacted the vegetation growth and affected the distribution characteristics of the SOC by modifying the soil environmental conditions. Changes in SOC following land formation influenced the rapid succession of soil properties and vegetation, with the modification of carbon sinks in the ecosystems.

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Section: Introductionmentioning

confidence: 99%

Chronosequence Changes of Soil Organic Carbon in Salt Marshes under Artificial Intervention: A Case Study of Hengsha Island in the Yangtze Estuary

Zhang,

Sha,

et al. 2024

Sustainability

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“…Currently, research is focused on the environmental and economic effects of ocean carbon sinks. Scholars found that shellfish, mangroves, and plankton are strong carbon sinks with ecological and environmental functions of increasing carbon sinks and reducing carbon sources (World Ocean Review, 2010;Reithmaier et al, 2023). They also researched nearshore aquaculture's carbon sequestration process and mechanism (Camp et al, 2016).…”

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confidence: 99%

Policy suggestions for tapping the potential of ocean carbon sinks in the context of “double carbon” goals in China

Wei,

Wang

2024

Front. Mar. Sci.

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China is rich in marine resources and has excellent potential for the development of oceanic carbon sinks. Ocean carbon sinks have shown broad application prospects, but the technical system for trading has not yet been perfected, the relevant legislation has not yet been established, etc. China should actively promote scientific research on ocean carbon sinks, improve the technical system of ocean carbon sinks, establish an ocean carbon sink trading system, and develop the eco-economy of ocean carbon sinks. It should also establish a sound system of laws and regulations to explore the potential of oceanic carbon sinks and contribute to the realization of China’s dual-carbon goal.

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Deconstructing the mangrove carbon cycle: Gains, transformation, and losses

Adame,

Cormier,

Taillardat

et al. 2024

Ecosphere

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Mangroves are one of the most carbon‐dense forests on the Earth and have been highlighted as key ecosystems for climate change mitigation and adaptation. Hundreds of studies have investigated how mangroves fix, transform, store, and export carbon. Here, we review and synthesize the previously known and emerging carbon pathways in mangroves, including gains (woody biomass accumulation, deadwood accumulation, soil carbon sequestration, root and litterfall production), transformations (food web transfer through herbivory, decomposition), and losses (respiration as CO2 and CH4, litterfall export, particulate and dissolved carbon export). We then review the technologies available to measure carbon fluxes in mangroves, their potential, and their limitations. We also synthesize and compare mangrove net ecosystem productivity (NEP) with terrestrial forests. Finally, we update global estimates of carbon fluxes with the most current values of fluxes and global mangrove area. We found that the contributions of recently investigated fluxes, such as soil respiration as CH4, are minor (<1 Tg C year−1), while the contributions of deadwood accumulation, herbivory, and lateral export are significant (>35 Tg C year−1). Dissolved inorganic carbon exports are an order of magnitude higher than the other processes investigated and were highly variable, highlighting the need for further studies. Gross primary productivity (GPP) and ecosystem respiration (ER) per area of mangroves were within the same order of magnitude as terrestrial forests. However, ER/GPP was lower in mangroves, explaining their higher carbon sequestration. We estimate the global mean mangrove NEP of 109.1 Tg C year−1 (7.4 Mg C ha−1 year−1) or through a budget balance, accounting for lateral losses, a global mean of 66.6 Tg C year−1 (4.5 Mg C ha−1 year−1). Overall, mangroves are highly productive, and despite losses due to respiration and tidal exchange, they are significant carbon sinks.

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

Cited by 10 publications

References 56 publications

Chronosequence Changes of Soil Organic Carbon in Salt Marshes under Artificial Intervention: A Case Study of Hengsha Island in the Yangtze Estuary

Chronosequence Changes of Soil Organic Carbon in Salt Marshes under Artificial Intervention: A Case Study of Hengsha Island in the Yangtze Estuary

Policy suggestions for tapping the potential of ocean carbon sinks in the context of “double carbon” goals in China

Deconstructing the mangrove carbon cycle: Gains, transformation, and losses

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