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| African savanna | |
|---|---|
| Name | African savanna |
| Biome type | Tropical grassland |
| Countries | Kenya, Tanzania, South Africa, Botswana, Namibia, Zimbabwe, Zambia, Mozambique, Angola, Uganda |
| Climate | Tropical wet and dry |
| Dominant vegetation | Grasses, scattered trees |
African savanna The African savanna is a vast tropical grassland biome characterized by a mosaic of grasses, scattered trees and shrubs, and a rich assemblage of large mammals. It spans multiple African countries and ecoregions and has been central to scientific studies by institutions such as the Royal Geographical Society, Max Planck Society, and Smithsonian Institution. The savanna underpins cultural heritage in regions associated with the Great Rift Valley, the Serengeti National Park, and the Okavango Delta.
The savanna covers extensive areas across eastern, southern, and parts of western Africa, including the Serengeti, the Masai Mara, the Kalahari Basin, the Miombo woodlands, and the Sudanian savanna. It lies between tropical rainforests like the Congo Basin and arid zones such as the Sahara Desert and the Namib Desert, forming transitions with ecoregions described by the World Wildlife Fund and mapped by organizations like the United Nations Environment Programme. Major rivers and basins influencing its extent include the Zambezi River, Limpopo River, Okavango River, and the Nile River headwaters, while mountain ranges like the Aberdare Range and the Drakensberg affect local patterns.
The savanna climate is typified as tropical wet-and-dry under the Köppen climate classification and shows pronounced wet and dry seasons influenced by the Intertropical Convergence Zone and annual shifts of the Hadley cell. Seasonal rainfall patterns are recorded by meteorological agencies such as the South African Weather Service, the Kenya Meteorological Department, and the Tanzania Meteorological Authority. Fire regimes, drought episodes, and interannual variability are linked to phenomena like the El Niño–Southern Oscillation and historical records maintained by the European Centre for Medium-Range Weather Forecasts and the National Oceanic and Atmospheric Administration.
Vegetation ranges from open grasslands dominated by species catalogued in herbaria such as the Royal Botanic Gardens, Kew and the Missouri Botanical Garden to wooded savannas and shrublands like the Miombo and Mopane woodlands. Dominant genera include Acacia (now partly reclassified into Vachellia and Senegalia), Brachystegia, Colophospermum, and grasses recorded by floristic surveys from institutions including the Oxford University Herbaria, University of Cape Town, and the University of Pretoria. Fire-adapted species and resprouting trees interact with grazing pressures studied by ecologists from the Durrell Institute of Conservation and Ecology and the American Natural History Museum.
The savanna supports iconic megafauna such as African elephant, African elephant (Loxodonta), forest elephant in bordering habitats, lion, cheetah, plains zebra, wildebeest, giraffe, and hippopotamus. Predator–prey dynamics, migration phenomena like the Great Migration linking the Serengeti and Masai Mara, and ecosystem engineering by species such as Loxodonta are central topics for research by groups including the Wildlife Conservation Society and the African Wildlife Foundation. Interactions with bird assemblages recorded at sites like the Lesser Flamingo colonies in the Lake Natron region and with invertebrate communities studied by the Natural History Museum, London further shape savanna ecology.
Humans have shaped savanna landscapes through pastoralism, agriculture, and urbanization, with archaeological and anthropological work by the British Museum, National Museums of Kenya, and the Institut Français d’Afrique Noire documenting long-term use. Pastoral societies such as the Maasai, Himba, San (Bushmen), and Tswana have cultural practices tied to grazing and fire management, while colonial-era land policies enacted by administrations like the British Empire and the Union of South Africa altered tenure systems. Modern land use involves national parks (e.g., Kruger National Park, Etosha National Park), conservation concessions, agro-pastoral systems, and infrastructure projects by entities such as the African Development Bank and World Bank.
Conservation challenges include habitat conversion for agriculture promoted by national ministries (e.g., Ministry of Agriculture (Kenya), Department of Agriculture, Forestry and Fisheries (South Africa)), poaching driven by illegal trade networks linked to markets referenced in investigations by Interpol and CITES, and climate change assessed by the Intergovernmental Panel on Climate Change. Invasive species, altered fire regimes, and fragmentation from roads and mines (e.g., projects authorized by Anglo American plc and De Beers) exacerbate declines in species monitored by the IUCN Red List and by NGOs such as Conservation International and Fauna & Flora International.
Restoration and management employ protected area design promoted by the Convention on Biological Diversity and community-based approaches supported by organizations like the United Nations Development Programme and WWF International. Techniques include prescribed burning informed by research at the University of Oxford and University College London, controlled grazing programs coordinated with local councils and traditional authorities, rewilding trials studied in partnership with the Durrell Conservation Academy, and translocations overseen by bodies such as the IUCN/SSC and national park agencies. Payments for ecosystem services piloted under programs by the Green Climate Fund and habitat connectivity initiatives funded by the European Union aim to reconcile livelihoods with biodiversity outcomes.