New Study Highlights Key Drivers of Carbon and Nitrogen Recovery in Restored Coastal Wetlands
A new global meta-analysis of 300 restored coastal wetland sites shows that restoration significantly boosts carbon and nitrogen recovery, but full ecosystem recovery takes decades.
Across salt marshes and mangroves, restored wetlands regained 37–76% of soil carbon, 43–83% of soil nitrogen, and 34–119% of plant biomass carbon compared to natural sites, depending on the restoration method. Plant biomass typically recovers within ~20 years, while soil carbon and nitrogen require ~40 years.
The study also finds that recovery performance varies by restoration approach, vegetation regrowth, soil conditions, hydrology, and whether wetlands are created or remediated.
These insights provide valuable guidance for improving coastal restoration strategies aimed at enhancing carbon and nitrogen storage.
