A meta-analysis of the ecological and economic outcomes of mangrove restoration

Jie Su (), Daniel A. Friess and Alexandros Gasparatos
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Jie Su: The University of Tokyo
Daniel A. Friess: National University of Singapore
Alexandros Gasparatos: The University of Tokyo

Nature Communications, 2021, vol. 12, issue 1, 1-13

Abstract: Abstract Mangrove restoration has become a popular strategy to ensure the critical functions and economic benefits of this ecosystem. This study conducts a meta-analysis of the peer-reviewed literature on the outcomes of mangrove restoration. On aggregate, restored mangroves provide higher ecosystem functions than unvegetated tidal flats but lower than natural mangrove stands (respectively RR’ = 0.43, 95%CIs = 0.23 to 0.63; RR’ = −0.21, 95%CIs = −0.34 to −0.08), while they perform on par with naturally-regenerated mangroves and degraded mangroves. However, restoration outcomes vary widely between functions and comparative bases, and are mediated by factors such as restoration age, species, and restoration method. Furthermore, mangrove restoration offers positive benefit-cost ratios ranging from 10.50 to 6.83 under variable discount rates (−2% to 8%), suggesting that mangrove restoration is a cost-effective form of ecosystem management. Overall, the results suggest that mangrove restoration has substantial potential to contribute to multiple policy objectives related to biodiversity conservation, climate change mitigation and sustainable development.

Date: 2021
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DOI: 10.1038/s41467-021-25349-1

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