Rising sea level reduces carbon sequestration, CO₂, and N₂O flux while promoting CH₄ flux from Mangroves

Sea-level rise (SLR) may offset gains made by enhancing mangrove carbon sequestration through greater greenhouse gas emissions. However, accurate prediction of greenhouse gas (GHG) fluxes under future SLR is still relatively uncertain. In this study, we implemented a series of “marsh-organ” designs (experimental platforms at different elevations) along a latitudinal gradient in China, simulating four sea-level scenarios. We investigated the factors driving the patterns observed in ecosystem respiration (Reco), methane (CH4), and nitrous oxide (N2O) fluxes from mangroves and adjacent mudflats. We examined environmental factors, soil properties, and net ecosystem productivity (NEP), and we used structural equation models to map functional process impacts on GHG fluxes. Our findings revealed that SLR reduced NEP, Reco, and N2O fluxes while increasing CH4 emissions in both mudflat and mangroves. SLR and latitudinal distribution significantly altered biological and abiotic factors that influ..., , , # Data from: Rising sea level reduces carbon sequestration, CO~2~, and N~2~O flux while promoting CH~4~ flux from Mangroves Dataset DOI: [10.5061/dryad.m0cfxpp9x](https://doi.org/10.5061/dryad.m0cfxpp9x) ## Description of the data and file structure This database links with Qiao et al, 2025, Rising sea level reduces carbon sequestration and CO~2~ and N~2~O fluxes while promoting CH~4~ flux from mangroves. [https://doi.org/10.1016/j.crsus.2025.100520](https://doi.org/10.1016/j.crsus.2025.100520). ### Files and variables #### File: Database.xlsx #### Abbreviation Definitions (units) * Lat: Latitude - SLR: sea-level rise (cm) * Comm: Community - Tair: Air temperature (^o^C) * Tsoil: Soil temperature (^o^C) - Eh: Redox potential (mV) * Ec: Conductivity (ms/cm) - C: Total carbon content (%) * N: Nitrogen content (%) - S: Sulfur content (%) * Reco: ecosystem respiration (gCO~2~ m ^-2^ year ^-1^) - CH~4~: methane flux (gCH~4~ m ^-2^ year ^-1^) * N~2~O: nitrous oxide (gN~2~...,