Influence of species richness and environmental context on early survival of replanted mangroves at Gazi bay, Kenya

Background

Mangrove restoration is often unsuccessful, thus this study involves long-term large-scale experiments measuring a range of ecosystem functions in replanted mangrove stands in Ghazi in Kenya funded by Earthwatch.

Goals & Methods

The general goal of the study is to understand the various dynamics influence on mangrove sampling survival and variables linked to ecosystem functions in degraded areas. The main experiment test involved intercropping in mangrove restoration, growing both a mixed stand and a mono-specific one. Earthwatch volunteers assess productivity animal species diversity, root weight and biomass and new growth of mangroves species grown under different planting regimes. In the second phase, researchers seek to quantify and cost-out the carbon sequestration potential of mangrove plantations, including harvested stands, to develop a demonstration and community-run sequestration plantation.

Conclusions & Takeaways

Some of the key results from this 5-year study have been the discovery that Avicennia marina grows vigorously, has a high survival rate and also appears to facilitate growth and natural recruitment of other species. Also the size of plot and size of tree at planting have been shown to have little effect, therefore there is no reason to keep trees in nurseries until they reach a large size. In summary, results from this project will be valuable to mangrove restoration efforts on a regional and international level.