The Greenhouse Gas Offset Potential From Seagrass Restoration

Oreska, Matthew P. J.; Mcglathery, Karen J.; Aoki, Lillian R.; Berger, Amélie C.; Berg, Peter; Mullins, Lindsay

doi:10.1038/s41598-020-64094-1

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

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The Greenhouse Gas Offset Potential From Seagrass Restoration

2020
By Oreska, Matthew P. J. ; Mcglathery, Karen J. ; Aoki, Lillian R. ; ...
Source: Sci Rep 10, 7325 (2020)

[PDF-2.66 MB]

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Journal Title:

Scientific Reports
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Oreska, Matthew P. J. ; Mcglathery, Karen J. ; Aoki, Lillian R. ; Berger, Amélie C. ; Berg, Peter ; ... More +

Oreska, Matthew P. J. ; Mcglathery, Karen J. ; Aoki, Lillian R. ; Berger, Amélie C. ; Berg, Peter ; Mullins, Lindsay Less -
NOAA Program & Office:

Sea Grant ; OAR (Oceanic and Atmospheric Research)

Sea Grant ; OAR (Oceanic and Atmospheric Research) Less -
Sea Grant Program:

VSGCP (Virginia Sea Grant)
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Awarding CO2 offset credits may incentivize seagrass restoration projects and help reverse greenhouse gas (GHG) emissions from global seagrass loss. However, no study has quantified net GHG removal from the atmosphere from a seagrass restoration project, which would require coupled Corg stock and GHG flux enhancement measurements, or determined whether the creditable offset benefit can finance the restoration. We measured all of the necessary GHG accounting parameters in the 7-km2 Zostera marina (eelgrass) meadow in Virginia, U.S.A., part of the largest, most cost-effective meadow restoration to date, to provide the first seagrass offset finance test-of-concept. Restoring seagrass removed 9,600 tCO2 from the atmosphere over 15 years but also enhanced both CH4 and N2O production, releasing 950 tCO2e. Despite tripling the N2O flux to 0.06 g m−2 yr−1 and increasing CH4 8-fold to 0.8 g m−2 yr−1, the meadow now offsets 0.42 tCO2e ha−1 yr−1, which is roughly equivalent to the seagrass sequestration rate for GHG inventory accounting but lower than the rates for temperate and tropical forests. The financial benefit for this highly successful project, $87 K at $10 MtCO2e−1, defrays ~10% of the restoration cost. Managers should also consider seagrass co-benefits, which provide additional incentives for seagrass restoration.
Keywords:

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Carbon Sequestration Eelgrass Restoration Ecology
Source:

Sci Rep 10, 7325 (2020)
DOI:

https://doi.org/10.1038/s41598-020-64094-1
Sea Grant Document Number:

VSGCP-R-20-005
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Journal Article
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CC BY
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urn:sha256:35e6f7e6605a5041542c7abdbfca98a55027f270f3aa143063c48992623067d6
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https://repository.library.noaa.gov/view/noaa/37488/noaa_37488_DS1.pdf
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The Greenhouse Gas Offset Potential From Seagrass Restoration

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