|Location||Kenya, Rift Valley Province|
|Central coordinates||36o 7.08' East 0o 15.24' North|
|IBA criteria||A1, A4i, A4iii|
|Altitude||1,000 - 1,600m|
|Year of IBA assessment||2001|
Site description Bogoria is a narrow, shallow, alkaline lake on the Rift Valley floor, varying from 3,000 to 4,250 ha in extent, with a maximum depth of 8.5 m. To the east, the Siracho escarpment rises abruptly from the lakeshore, while on the relatively flat western shore is a series of spectacular hot springs and geysers. The reserve was gazetted in 1981 and includes the entire lake and its immediate surroundings. The water usually supports a dense bloom of the cyanophyte Spirulina sp. The terrestrial vegetation is mainly thorny bushland, dominated by species of Acacia, Balanites and Commiphora, with patches of riverine woodland containing Ficus capensis, Acacia xanthophloea and A. tortilis. The open shore, often littered with lava boulders, is dominated by alkaline-tolerant grasslands of Sporobolus spicatus, with the sedge Cyperus laevigatus around the hot springs. The lower slopes of the Siracho escarpment are covered by Combretum and Grewia thicket. The lake is fed by its springs and by the Sandai (or Waseges) river, which rises on the eastern scarp of the Rift Valley. The Sandai flows past the lake and then turns through 180° to enter it from the north through the Kisibor swamp, a sizeable freshwater wetland dominated by Typha.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Black-necked Grebe Podiceps nigricollis||winter||1997||3,700 individuals||-||A4i||Least Concern|
|Greater Flamingo Phoenicopterus roseus||winter||2001||18,540 individuals||-||A4i||Least Concern|
|Lesser Flamingo Phoeniconaias minor||winter||1999||1,070,000 individuals||-||A1, A4i||Near Threatened|
|A4iii Species group - waterbirds||winter||-||1,000,000-2,499,999 individuals||unknown||A4iii|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Lake Bogoria||National Reserve||10,705||is identical to site||10,700|
|Lake Bogoria||Wetlands of International Importance (Ramsar)||10,700||is identical to site||10,700|
|IUCN habitat||Habitat detail||Extent (% of site)|
|Grassland||Grassland - edaphic, wet||-|
|Savanna||Bushland & thicket - evergreen||-|
|Wetlands (inland)||Saline lakes||40%|
|Land-use||Extent (% of site)|
|nature conservation and research||-|
Other biodiversity The hot springs contain a highly specialized microbial fauna, with several endemic species.
References Bennun (1993), Bennun and Nasirwa (2000), Brown (1973), Burgis and Mavuti (1987), Hartley (1986), Nasirwa and Bennun (1994, 1995), Nasirwa and Owino (2000), Njuguna (1996), Owino and Nasirwa (2001), Owino et al. (in press), Oyugi (1994), Oyugi and Owino (1998a,b, 1999), Tuite (1979, 1981).
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Recommended citation BirdLife International (2014) Important Bird Areas factsheet: Lake Bogoria National Reserve. Downloaded from http://www.birdlife.org on 22/08/2014
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