|Scientific Name:||Encephalartos equatorialis P.J.H.Hurter|
Encephalartos imbricans Vorster
|Red List Category & Criteria:||Critically Endangered B1ab(ii,iii,v)+2ab(ii,iii,v); C1 ver 3.1|
|Reviewer(s):||Agenbag, L. & Bösenberg, J.D.|
The population is small and declining due to habitat destruction, collecting and an apparent lack of reproduction. It would be classified as Endangered based on overall numbers, but in terms of effective population size, it qualifies as Critically Endangered, i.e. despite overall number of ca. 300 plants, there is an overwhelming bias towards males with only 20-30 female plants. The male bias has been observed in other cycads that have declined rapidly. Tyhe species also qualifies as Critically Endangered under criteria B1 and B2 due to its very small extent of occurrence (5 km²) and area of occupancy (1 km²), the remaining population is fragmented and there is continuing decline.
|Previously published Red List assessments:|
|Range Description:||This species is known from one or two granite hills on the eastern shore of Thurston Bay, Lake Victoria, Uganda. Occurs at an elevation of about 1,000 m.|
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Exact population figures are not available. Heibloem (1999) recorded less than 100 plants, but Goode (2001) mentions that there are up to 300 plants. The population is dominated by male plants.|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:||E. equatorialis is found on two adjacent low exposed granite hilltops. Plants grow on the western aspect of the hills. Plants grow wedged in crevices in a severely degraded rainforest.|
|Generation Length (years):||70|
|Major Threat(s):||No young plants or seedlings were seen and this could indicate that the pollinator could be extinct or that fires occur too frequently. There is also evidence of collector activity.|
|Conservation Actions:||This species is listed on Appendix I of the CITES Appendices.|
Goode, D. 2001. Cycads of Africa. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
Heibloem, P. 1999. Cycads of Central Africa. Publication Fund, Palm & Cycad Societies of Australia, Brisbane.
Hurter, P.J.H. and Glen, H.F. 1995. Encephalartos equatorialis (Zamiaceae): a newly described species from tropical Africa. South African Journal of Botany 61(4): 226-229.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Vorster, P. and Heibloem, P. 1995. Encephalartos imbricans (Zamiaceae): A new species from Uganda. Novon 5: 388-394.
|Citation:||Donaldson, J.S. 2010. Encephalartos equatorialis. The IUCN Red List of Threatened Species 2010: e.T41887A10569026.Downloaded on 20 June 2018.|
|Feedback:||If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided|