Australian vegetated coastal ecosystems as global hotspots for climate change mitigation

By O. Serrano, C. Lovelock, Trisha B Atwood, Peter I. Macreadie, Robert F. Canto, Stuart R. Phinn, A. Arias‐Ortiz, L. Bai, Jeff Baldock, Camila Bedulli and 35 more. Nature Communications, 2019

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Policies aiming to preserve vegetated coastal ecosystems (VCE; tidal marshes, mangroves and seagrasses) to mitigate greenhouse gas emissions require national assessments of blue carbon resources. Here, we present organic carbon (C) storage in VCE across Australian climate regions and estimate potential annual CO2 emission benefits of VCE conservation and restoration. Australia contributes 5–11% of the C stored in VCE globally (70–185 Tg C in aboveground biomass, and 1,055–1,540 Tg C in the upper 1 m of soils). Potential CO2 emissions from current VCE losses are estimated at 2.1–3.1 Tg CO2-e yr-1, increasing annual CO2 emissions from land use change in Australia by 12–21%. This assessment, the most comprehensive for any nation to-date, demonstrates the potential of conservation and restoration of VCE to underpin national policy development for reducing greenhouse gas emissions. Policies aiming to preserve vegetated coastal ecosystems (VCE) to mitigate greenhouse gas emissions require national assessments of blue carbon resources. Here the authors assessed organic carbon storage in VCE across Australian and the potential annual CO2 emission benefits of VCE conservation and find that Australia contributes substantially the carbon stored in VCE globally.

Subfields: Earth-Surface Processes, Ecology, Oceanography

View Paper: https://www.semanticscholar.org/paper/f51dbb5aa236c0aee661b9eb0f4e30e9a136a5e1

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