Miombo is the vernacular word for Brachystegia, a genus of tree comprising many tree species together with Julbernardia species in woodlands. Miombo woodland is classified in the tropical and subtropical grasslands, savannas, and shrublands biome (in the World Wide Fund for Nature scheme). The biome includes four woodland savanna ecoregions (listed below) characterized by the predominant presence of miombo species, with a range of climates from humid to semi-arid, and tropical to subtropical or even temperate.
Characteristically the trees shed their leaves for a short period in the dry season to reduce water loss, and produce a flush of new leaves just before the onset of the rainy season with rich gold and red colours masking the underlying chlorophyll, reminiscent of temperate autumn colours.
The name miombo is used in a number of Bantu languages in the region such as Swahili, Shona and Bemba. In Bemba, the word "miombo" is the plural of the word "muombo", which is the specific name for the species Brachystegia longifolia.
Miombo woodland ecoregionsEdit
Miombo woodlands form a broad belt across south-central Africa, running from Angola in the west to Tanzania to the east. These woodlands are dominated by trees of subfamily Caesalpinioideae, particularly miombo (Brachystegia), Julbernardia and Isoberlinia, which are rarely found outside miombo woodlands. The four ecoregions are:
- Angolan miombo woodlands (Angola)
- Central Zambezian miombo woodlands (Angola, Burundi, Democratic Republic of the Congo, Malawi, Tanzania, Zambia)
- Eastern miombo woodlands (Mozambique, Tanzania)
- Southern miombo woodlands (Malawi, Mozambique, southern Zambia, Zimbabwe)
Miombo woodlands can be classified as dry or wet based on the per annum amount and distribution of rainfall. Dry woodlands occur in those areas receiving less than 1000 mm annual rainfall, mostly in Zimbabwe, Central Tanzania and southern areas of Mozambique, Malawi and Zambia. Wet woodlands are those receiving more than 1000 mm annual rainfall, mainly located in Northern Zambia, eastern Angola, central Malawi and southwestern Tanzania.
These miombo woodlands are also important to the livelihoods of many rural people, who depend on the resources available from the woodland. The wide variety of species provides non-timber products such as fruits, honey, fodder for livestock and fuelwood.
Flora and faunaEdit
Despite the relatively nutrient-poor soil, long dry season (and low rainfall in some areas) the woodland is home to many species, including several miombo specialist endemic bird species. The predominant tree is miombo (Brachystegia spp.). It also provides food and cover for mammals such as the African elephant (Loxodonta africana), African wild dog (Lycaon pictus), sable antelope (Hippotragus niger) and Lichtenstein's hartebeest (Sigmoceros lichtensteinii).
Foliage and pods of the mountain mfuti, Brachystegia glaucescens
- Gambiza, J; Bond, W; Frost, P.G.H; Higgins, S (2000). "SPECIAL SECTION: LAND USE OPTIONS IN DRY TROPICAL WOODLAND ECOSYSTEMS IN ZIMBABWE". Ecological Economics. 33 (3): 353–368. doi:10.1016/s0921-8009(00)00145-2.
- Abdallah, J. M.; Monela, G. G. (2007). "Overview of Miombo Woodlands in Tanzania" (PDF). Working Papers of Finnish Research Institute. 50: 9–23.
- Bruce M Campbell. 1996
- "Eastern Miombo woodlands". Terrestrial Ecoregions. World Wildlife Fund.
- Earthtrends.wri.org: Map of Miombo forests-grasslands-drylands