Useful Tree Species for Eastern Africa
a species selection tool based on the VECEA Map
Itigi thicket (edaphic vegetation type, code: bi)
Itigi thickets are dense deciduous thickets that occur on specialized soils in various drier parts and towards the periphery of the Zambezian floristic region. Itigi thicket took its name from the Tanzanian village of Itigi (5º 42’ S, 34º 29’ E) where the most extensive manifestation of this vegetation type occurs. During the rainy season, the soil is well aerated, well supplied with water and soft. The soil dries out during the dry season (at least in its upper layers) and then hardens considerably (White 1983 p. 97). Itigi thicket can only regenerate in gaps during periods of high rainfall (C. K. Ruffo, pers. comm.). Similar conditions of ample water during the rainy season but little or no water during the dry season are found at a more reduced scale in Itigi forest in Zambia (Fanshawe 1971 p. 25). For these reasons, Itigi thicket is a vegetation type that is edaphically determined (White 1983 p. 49). However, Zambian Itigi occurs in a wetter zone than the Tanzanian Itigi (M. Bingham, pers. comm.). The vegetation type is considered an ecoregion (Itigi-Sumbu thicket ecoregion) on the WWF ecoregional map.
The main species recorded to occur within this vegetation type are listed below. Clicking the name of any of these species will open the page for that species on the Agroforestry Species Switchboard. Between brackets the English vernacular name of the species and the documented country distribution of the species (B=Burundi, E=Ethiopia, K=Kenya, M=Malawi, R=Rwanda, T=Tanzania, U=Uganda, Z=Zambia) is provided.
Based on information on species presence in national manifestations of vegetation types, each species was classified as a regionally dominant, characteristic, present or marginal species for a vegetation type (Read more ...)
Products and environmental services of tree species
Documented products and environmental services for the tree species occurring in this vegetation type (bi) are listed below. Clicking the name of any of these species will open the page for that species on the Agroforestry Species Switchboard. Between brackets information is given on the status of each species ('dom' indicates dominant species, 'cha' characteristic species, 'pre' other species and 'mar' species of marginal occurrence), the English vernacular name of the species and the documented country distribution of the species (B=Burundi, E=Ethiopia, K=Kenya, M=Malawi, R=Rwanda, T=Tanzania, U=Uganda, Z=Zambia).
- Timber, Furniture, Construction
- Poles, Posts
- Flooring, Panelling
- Tools, Tool handles, Shafts
- Carvings, Utensils, Walking stick, Bow, Arrow
- Boat building
- Farm implements
- Edible fruit, Edible nut, Edible seed
- Vegetable, Edible leaves, Edible roots
- Seasoning, Flavouring
- Drink, Soup
- Edible oil, Edible gum, Edible inner bark
- Ornamental, Avenue tree
- Nitrogen fixation
- Soil conservation, Soil improvement
- River bank, Sand stabilization
- Fibre, Weaving, Rope
- Thatch, Roofing, Mats, Baskets
- Resin, Gum, Glue, Latex
- Tannin, Dye
- Live fence, Dead fence
- Traditional uses
- Veterinary medicine, Vermifuge
- Toxin, Insecticide, Repellent
- Cosmetic, Soap, Perfume, Oil
For more detailed information about the species occurrences see this excel workbook. It provides country specific information on species composition for this vegetation type. It also allows you to select a subset of useful tree species to provide desired products and services. For each species links to a number of websites / databases with information about this species are provided as well.
The table shows the area (km2) of the vegetation type and the percentage of this area explicitly designated for biodiversity, species or landscape protection (A) and areas designated for both protection and sustainable use objectives (B). Only the nationally designated protected areas were included.
|PNV||Area (km2)||A (%)||B (%)|
A) Include the IUCN categories I - IV; B) Include the IUCN categories V - VI and the protected areas without IUCN classification. Read more