Mangrove Restoration

Mozambique

2018
plus de 100 000 habitants / more than 100,000
Mozambique

Quelimane

Période de réalisation de l'initiative

du 08/2013 au 08/2018

Description de l'initiative

The project aimed to restore the mangroves that had protected the city of Quelimane before they were devastated by the local population in search of wood for construction and charcoal production. The beneficiaries of the project have been these very same inhabitants, as well as the city as a whole. The methodology was to repopulate the bare mangrove fields with new mangroves and to involve the communities in this work, which included preparing seed beds, ridging and sowing. Parallel to replanting the mangroves, 12 resilient model houses were constructed using local materials, but without using mangroves. Local artisans were trained to build the houses so that they could then transfer this know-how to their peers. With the restoration of the mangroves and the introduction of sustainable development practices, Quelimane’s resilience to climate change has been improved.
The process of mangrove restoration in Quelimane had the following steps:
- Meeting with the beneficiary communities to describe the use of mangroves in the community, and to highlight the importance of the mangrove to them;
- Together with the community, defining protective actions for the mangrove and action to be taken to protect and fill in the gaps created in the mangrove florae;
- Deciding on how the restoration process should be done and when it must be started;
- With specialists on mangrove restoration, providing training to focal point persons identified by the community (three persons for each of the 4 beneficiary communities);
- Selecting Working Groups composed of 30 members in each community to work for a month, being replaced by other 30 members the following month. The focal points were in charge of teaching the groups on how to plant correctly, as well as supervising the planting process. Focal points remained the same from the beginning to the end of project.
- A daily amount of 150 Mt (approx. 2.42 USD) per person was paid to each participant.
- In the first year we bought the seedlings from an NGO called ANAMA but in the second year each beneficiary community established a nursery to produce their own seedlings. Also, from the second year, we introduced the direct planting of propagules in the field, which had a very good survival rate (87%) compared with planting seedlings (4.7%-9%).
- Both seedlings and propagules were planted and sown in both edges of a ridge of 3 meters in width, separated 2 meters from one ridge to other. On the advice of US Forest Service this method was abandoned and in the third year we starting planting in a flat areas, but the survival rate did not increase.
- In light of the costs of restoration using the methodology described above, and on the advice of experts from University of California, we decided to use ‘hydrologic restoration’ instead. Using this approach, the community groups constructed a total of 31 km of canals covering a total of 86 hectares. In hydrologic restoration the canals transport the seeds (propagules), which spread and germinate evenly in the field.

Principaux résultats obtenus

Quelimane’s mangrove replanting project restored 33 hectares of devastated land, repopulating it with new mangroves. In addition, 86 hectares of land was prepared for hydrologic restoration in the Icidua and Mirazane areas of the Municipality. This has reduced the levels of tides and flooding of the city. It has also boosted biodiversity as some crustaceans now have breeding grounds. With more mangroves recovered, we believe that carbon emission have also been reduced and that index of erosion and salt intrusion will also be reduced.

Localisation