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91 results for “African savannas”
Data from: Understanding nutrient dynamics in an African savanna: local biotic interactions outweigh a major regional rainfall gradient
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Data from: Woody plant biomass and carbon exchange depend on elephant-fire interactions across a productivity gradient in African savanna
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Semi-arid African savanna habitat suitability for two Vachellia species
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Data from: Fire prevents woody encroachment only at higher-than-historical frequencies in a South African savanna
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Data from: Fire frequency drives habitat selection by a diverse herbivore guild impacting top–down control of plant communities in an African savanna
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Characteristics of African Savanna Biomes for Determining Woody Cover
This data set includes the soil and vegetation characteristics, herbivore estimates, and precipitation measurement data for the 854 sites described and analyzed in Sankaran et al., 2005. Savannas are globally important ecosystems of great significance to human economies. In these biomes, which are characterized by the co-dominance of trees and grasses, woody cover is a chief determinant of ecosystem properties. The availability of resources (water, nutrients) and disturbance regimes (fire, herbivory) are thought to be important in regulating woody cover but perceptions differ on which of these are the primary drivers of savanna structure. Analyses of data from 854 sites across Africa (Figure 1) showed that maximum woody cover in savannas receiving a mean annual precipitation (MAP) of less than approximately 650 mm is constrained by, and increases linearly with, MAP. These arid and semi-arid savannas may be considered stable systems in which water constrains woody cover and permits grasses to coexist, while fire, herbivory and soil properties interact to reduce woody cover below the MAP-controlled upper bound. Above a MAP of approximately 650 mm, savannas are unstable systems in which MAP is sufficient for woody canopy closure, and disturbances (fire, herbivory) are required for the coexistence of trees and grass. These results provide insights into the nature of African savannas and suggest that future changes in precipitation may considerably affect their distribution and dynamics (Sankaran et al., 2005).This data set includes the site characteristics and measurement data for the 854 sites described and analyzed in Sankaran et al., 2005. The data are provided in two formats, *.xls and *.csv. See the data format section below for more information. A companion document composed of the supplemental documentation and figures provided with Sankaran et al., 2005 is also included (ftp://daac.ornl.gov/data/global_vegetation/savanna_woody_cover/comp/Woody_Cover.pdf).
Distribution. Widespread in the savanna regions of Africa, patchily N of the equator from Sierra Leone, Ivory Coast, Nigeria, Central African Republic, Ethiopia, Somalia, and Kenya; S of the equator recorded from SE DR Congo, Tanzania, Angola, Zambia, Malawi, Namibia, Botswana, Zimbabwe, Mozambique, and extreme NE South Africa; also in Zanzibar Archipelago (Pemba, Unguja, and Mafia Is). in Hipposideridae
Distribution. Widespread in the savanna regions of Africa, patchily N of the equator from Sierra Leone, Ivory Coast, Nigeria, Central African Republic, Ethiopia, Somalia, and Kenya; S of the equator recorded from SE DR Congo, Tanzania, Angola, Zambia, Malawi, Namibia, Botswana, Zimbabwe, Mozambique, and extreme NE South Africa; also in Zanzibar Archipelago (Pemba, Unguja, and Mafia Is).
Subspecies and Distribution. H.a.aquaticusOgilby,1841—WAfricafromGuineaandSierraLeonetoGhana. H.a.bates:Lydekker,1906—Nigeria,Cameroon,andpresumablyneighboringcountries. H. a. cottoni Lydekker, 1906 — Republic of the Congo, DR Congo, and presumably Uganda. The Water Chevrotain reportedly has a disjunct distribution, occurring in coastal forests from West Africa and in the rainforests of Central Africa from Nigeria to DR Congo, marginally entering Uganda. It has been listed for the following countries in Central Africa: Angola (Cabinda), Cameroon, Central African Republic, DR Congo, Equatorial Guinea, Gabon, Nigeria, Republic of the Congo, and Uganda (Semliki Valley). A record from Angola's Lunda Norte Province, near the Cassai River,is the southernmost record of the species. The species' status in some countries remains unclear. It is apparently absent from the Republic of Benin and Togo (but the speciesis listed as probable in the Ot Basin in Togo); its supposed occurrence in Guinea Bissau and Senegal remains unsupported by evidence. The species was listed for Sierra Leone, although its presence had been called into question. Photographic evidence seems to clarify that the species occurs in Sierra Leone. In 1850, a specimen was recorded from Gambia, but the present status of the species is unclear. Local people report the species from the Boké Préfecture in NW Guinea, which might be the northernmost area from which the species has been recently reported. Extensive field and market surveys there and in the southern Guinea savanna belt did notfind evidence for the species' presence. in Tragulidae
Subspecies and Distribution. H.a.aquaticusOgilby,1841—WAfricafromGuineaandSierraLeonetoGhana. H.a.bates:Lydekker,1906—Nigeria,Cameroon,andpresumablyneighboringcountries. H. a. cottoni Lydekker, 1906 — Republic of the Congo, DR Congo, and presumably Uganda. The Water Chevrotain reportedly has a disjunct distribution, occurring in coastal forests from West Africa and in the rainforests of Central Africa from Nigeria to DR Congo, marginally entering Uganda. It has been listed for the following countries in Central Africa: Angola (Cabinda), Cameroon, Central African Republic, DR Congo, Equatorial Guinea, Gabon, Nigeria, Republic of the Congo, and Uganda (Semliki Valley). A record from Angola's Lunda Norte Province, near the Cassai River,is the southernmost record of the species. The species' status in some countries remains unclear. It is apparently absent from the Republic of Benin and Togo (but the speciesis listed as probable in the Ot Basin in Togo); its supposed occurrence in Guinea Bissau and Senegal remains unsupported by evidence. The species was listed for Sierra Leone, although its presence had been called into question. Photographic evidence seems to clarify that the species occurs in Sierra Leone. In 1850, a specimen was recorded from Gambia, but the present status of the species is unclear. Local people report the species from the Boké Préfecture in NW Guinea, which might be the northernmost area from which the species has been recently reported. Extensive field and market surveys there and in the southern Guinea savanna belt did notfind evidence for the species' presence.
Distribution. Forest-savanna margin of the African forest block; there are records from Cameroon, Central African Republic, DR Congo, Uganda, Rwanda, Tanzania, and NE Angola, and possibly present in South Sudan. in Soricidae
Distribution. Forest-savanna margin of the African forest block; there are records from Cameroon, Central African Republic, DR Congo, Uganda, Rwanda, Tanzania, and NE Angola, and possibly present in South Sudan.
Impacts of invasive alien species on riparian plant communities in South-African savanna - data to the article
<p>Data on plant species richness, Shannon's diversity, Pielou's evenness, and abundance (cover) of individual plant species in the plots.</p>
Data to manuscript "Habitat and bedrock modify the relationship between plant and herbivore species richness in a South-African savanna"
<p>Data on herbivore abundance and species richness and grass cover and species richness obtained in the MOSAIK project. Detailed description is provided in the manuscript "Habitat and bedrock modify the relationship between plant and herbivore species richness in a South-African savanna".</p>
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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