Mangrove Restoration Efforts Show Measurable Gains in Carbon Storage

Mangrove forests play a critical role in carbon storage and coastal protection, and recent restoration activities have contributed to ecosystem recovery in various regions.

As of 2020, mangrove forests spanned an estimated 147,350 square kilometres worldwide, an area comparable to the size of Bangladesh. Despite this extensive coverage, the total global area of mangroves decreased by approximately 3.4% between 1996 and 2020.

Restoration initiatives have been carried out in at least 22 countries, with a concentration of studies in East and Southeast Asia. Over the past four decades, nearly 2,000 square kilometres of mangroves have been actively replanted, and up to 8,000 square kilometres of previously cleared land remain suitable for further restoration.

Community-led projects have contributed to these efforts, such as the planting of more than 12,000 mangrove seedlings in Kenya’s Mida Creek. In Colombia, the Vida Manglar initiative is working to conserve and restore 7,500 hectares of mangroves, with a large portion of carbon credit revenues reinvested into local communities.

What the numbers show

• Natural expansion in African and Asian river deltas offset 44% of carbon losses from 2000 to 2016
• Newly regenerated mangroves in these deltas contained 84% to 160% of the aboveground carbon of lost forests per hectare
• Mangrove ecosystems can store up to five times more carbon per acre than tropical rainforests

In major river deltas across Africa and Asia, natural regeneration of mangroves from 2000 to 2016 offset nearly half of the carbon losses caused by deforestation and erosion. These newly established forests were found to be taller and more carbon-dense than the areas they replaced, with each hectare accounting for a substantial proportion of the carbon previously lost.

Globally, mangrove ecosystems are recognized for their carbon storage capacity, with the ability to hold up to five times more carbon per acre compared to tropical rainforests. This characteristic highlights their importance in climate mitigation strategies and ecosystem services.

Research indicates that substantial areas cleared of mangroves remain viable for restoration, offering opportunities to further enhance carbon sequestration and support coastal biodiversity. The ongoing restoration activities in various countries reflect a broader pattern of ecosystem recovery and management.

Community involvement and reinvestment of resources, as seen in Kenya and Colombia, are key features of recent restoration projects. These approaches contribute to both environmental and local economic benefits, supporting the continued recovery of mangrove habitats.

* This article is based on publicly available information at the time of writing.