Resource Details

Mangroves of Kenya: effects of species richness on growth and ecosystem function of restored East African mangrove stands

Project: Available at NO COST Project - Scientific

Huxhman, M. & Kairo, J. 2008, "Mangroves of Kenya: effects of species richness on growth and ecosystem function of restored East African mangrove stands", Science Report, 11-13.


  • Endingburg Napier University, UK.


Species Info

  • Avicennia marina
  • Bruguiera gymnorrhiza
  • Ceriops tagal


  • This project involves long-term large-scale experiments measuring a range of ecosystem functions in replanted mangrove stands in Ghazi in Kenya funded by Earthwatch.
  • The main experiment test is intercropping (mixing two or more species) in mangrove restoration by growing three species in mixed and mono-specific stands.
  • Earthwatch volunteers are assessing productivity animal species diversity, root weight and biomass and new growth of mangroves species grown under different planting regimes. In the second phase of project the 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.
  • Some of the key results from this 5-year project have been the discovery that Avicennia marina, the grey mangrove is a dominant species when replanted, it 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, which has relevance for the economics of restoration. Therefore there is no reason to keep trees in nurseries until they reach a large size.
  • Highest percentage survival after 702 days in the highest density plots and lowest survival in the lowest density plots. Positive effects of density on survival occurred at both high and low tidal sites. The problem of mangrove mangers of having to make trade-offs between encouraging sedimentation and planting at high density and suffering seedling mortality was not experienced here. Suggesting that increasing seedling density does not affect survival.
  • In summary, results from this project will be valuable to mangrove restoration efforts on a regional and international level.

Geographical Region

  • East Africa
  • Ecosystems

  • Mangrove
  • Country

  • Kenya
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