![]() Among blue carbon ecosystems, mangrove wetlands are the most productive 7, 8 and can significantly reduce carbon dioxide (CO 2) in the atmosphere throughout photosynthesis (i.e., sequestration) and the accumulation of organic matter in the soil (i.e., storage) 9, 10. This recognition is associated with the urgency to develop cost-effective mitigation measures to ameliorate climate change and variability, which are manifested by the increasing frequency of extreme events including excess precipitation and tropical cyclones 4– 6. Including the cyclone’s functional role in regulating mangrove C fluxes is critical to developing local and regional climate change mitigation plans.īlue carbon-the organic carbon sequestered and stored in coastal and marine ecosystems-is the most recognized ecosystem service worldwide 1– 3. We proposed a statistical model (PULITER) between IKE-based pulse index and NPP L to determine cyclone’s impact on mangrove role as C sink or source. Our analysis revealed that this lateral litter-POC flux (71–205 g C m −2 year −1)-currently unaccounted in global C budgets-is similar to C burial rates (69–157 g C m −2 year −1) and dissolved inorganic carbon (DIC, 61–229 g C m −2 year −1) export. ![]() Using long-term mangrove Net Primary Productivity (Litterfall, NPP L) data (2001–2018), we estimated cyclone-induced litterfall particulate organic C (litter-POC) export from mangroves to estuarine waters. Here we show how cyclones with a wide range of integrated kinetic energy (IKE) impact C fluxes in the Everglades, a neotropical region with high cyclone landing frequency. However, there is limited information assessing cyclone’s functional role in regulating wetlands carbon cycling from annual to decadal scales. Globally, mangroves are increasingly impacted by human and natural disturbances under climate warming, including pervasive pulsing tropical cyclones. Mangroves are the most blue-carbon rich coastal wetlands contributing to the reduction of atmospheric CO 2 through photosynthesis (sequestration) and high soil organic carbon (C) storage.
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