Mangroves to address sea level rise and coastal erosion
Establish nursery in which two or more mangrove seedlings can be grown in each module made from local materials, e.g. coconut husks. Modules of mangroves grown to varying heights can be deployed to different eroded coasts requiring protection and against future sea level rise.
Category of the action
Mitigation/Adaptation, Changing public attitudes about climate change
What actions do you propose?
Involved the active participation of a coastal community in the proposed project. Initial permission may have to be obtained from the federal or provincial government. The proposed project has several direct implications : contribution to increase the carbon sink of mangroves; economic contributions to the villagers in their collection of mangrove seeds, building nursery and modules, maintenance of the nursery and subsequent deployment and maintenance of the modules at the coast; change in behavioural norms of coastal community from an exploitative to a conservation perspective of mangroves.
Who will take these actions?
Government (federal, provincial or local) – for approval.
Business organization – for co-finance, CSR.
Village community – be physically involved in the proposed project.
Individual – donation.
Where will these actions be taken?
Southeast Asia (e.g. Philippines, Indonesia, Thailand, Cambodia are likely candidates)
What are other key benefits?
- keep up with sea level rise
- reduce or stop coastal erosion
- are a buffer to storm surges and other coastal hazards
- constitute a significant carbon sink
- rehabilitate degraded coasts
- are a nursery for fish and crustaceans
- contribute to coastal biodiversity
- provide livelihood opportunities
- provide an emergency food source
- contribute to a resilient coast
Planting mangroves is a ‘no regrets’ measure and confirms the ‘precautionary principle’.
What are the proposal’s costs?
Selection of village and awareness workshop 2,000
Seeds collection 1,000
Nursery establishment including modules 2,000
Maintenance of nursery including fertilizers 4,000
Deployment of modules to coast 2,000
Maintenance of modules at coast including 2,000
Short term maintenance (after 3 yr) 6,000
1st Quater – Awareness workshop, collection of seeds, establishment of nursery with modules
2nd Quater – Maintenance of nursery, replace/increase number of seedlings
3rd to 8th Quater – Maintenance of nursery
3rd Year – Deployment of modules to coast
4th Year onwards – Maintenance of modules at coast
Medium and long term – Only protection of mangroves by villages; legislation would be useful.
Adaptation for the coasts and islands :
Building with Nature Indonesia:
Mangrove Action Project 2006. Five Steps to Successful Ecological Restoration of Mangroves. Yogyakarta, Indonesia.