
Kenyan Giant Cycad
Encephalartos tegulaneusMelville
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Encephalartos tegulaneus.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
LC · Préoccupation mineure→Stable- Évaluation
- 2024 · v3.1
- Altitude
- 1200 – 2300 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
It is difficult to estimate the total population size of this species due to the inaccessible terrain but it is estimated that there are at least 5,500 to 10,600 mature individuals in the wild.
Menaces identifiées(6 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)Negligible declinesMinority (<50%)Ongoing5_3_3Unintentional effects: (subsistence/small scale) [harvest]Negligible declinesMinority (<50%)Ongoing12_1Other threatUnknownMinority (<50%)Unknown5_3_1Intentional use: (subsistence/small scale) [harvest]UnknownMinority (<50%)Ongoing7_2_10Large damsUnknownUnknownFuture2_1_4Scale Unknown/UnrecordedOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species is secure in most of its range. One site is threatened by over-collection for ornamental purposes (Encephalartos tegulaneus subsp. powysii) and traditionally hollowed-out stems have been used as cattle drinking troughs (E. t. subsp. tegulaneus). E. t. subsp. powysii may also be impacted due to habitat destruction as the neighbouring communities use the forest as a source of fuelwood and construction materials. The recent approval of the Grand Falls Dam on the Tana River could impact that subspecies too (Q. Luke pers. comm). Several collectors also report the absence of pollinators at the site for E. t. subsp. powysii and few or no seedlings.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry2_1Savanna - Dry6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix I of the CITES Appendices. Populations of Encephalartos tegulaneus subsp. tegulaneus occur in the Namunyak Wildlife Conservation Trust, which is a Rural Community Development Project and in the Mathews Range forest reserve and the Ndotos Range forest reserve. The known population of E. t. subsp. powysii occurs in a forest reserve, however, neighbouring communities use the forest as a source of fuel-wood and construction materials and as a place for hunting. Identification of further suitable sites for the formal protection of this species is needed. An education and awareness programme as well as the long-term monitoring of populations will support the conservation of this species.
Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection3_4_1Captive breeding/artificial propagation4_3Awareness & communications
Stress écologiques (8)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (2)Use & Trade — IUCNExpert
11Other household goodssubsistance13Pets/display animals, horticultureinternationalnational
Priorités de recherche (6)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_4Harvest, use & livelihoods1_5Threats1_6Actions3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Afrotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadTree - large
Références bibliographiques (11)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2024. The IUCN Red List of Threatened Species. Version 2024-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 27 June 2024).
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
- Goode, D. 2001. <i>Cycads of Africa</i>. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
- Miringu, B.W. and Beentje, H. 1999. <i>Encephalartos tegulaneus</i> subsp. <i>powysii</i> (Zamiaceae): a new cycad from central Kenya. <i>Journal of East African Natural History</i> 88: 35-39.
- Osborne, R. 1995. The Heenan expeditions revisited. <i>Encephalartos</i> 43: 16-23.
- Donaldson, J.S. 1995. Understanding cycad life histories- an essential basis for conservation. In: Donaldson, J.S. (ed.), <i>Cycad Conservation in South Africa- Issues, actions and priorities</i>, pp. 8-13. Cycad Society of South Africa.
- Beentje, H. 1994. <i>Kenya Trees, Shrubs and Lianas</i>. National Museums of Kenya, Nairobi.
- Faden, R.B. and Beentje, H.J. 1989. <i>Encephalartos kisambo</i>, a new cycad from Kenya, with a note on <i>E. tegulaneus</i>. <i>Utafiti</i> 2(1): 7-10.
- Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
- Heenan, D. 1977. Some observations on the cycads of Central Africa. <i>Botanical Journal of the Linnean Society</i> 74: 279-288.
- Melville, R. 1957. <i>Encephalartos</i> in Central Africa. <i>Kew Bulletin</i> 12: 237-257.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Eastern Arc Mountains & Coastal Forests CEPF Plant Assessment Project & Bösenberg, J.D.
contributor
Donaldson, J.S. & Luke, W.R.Q.
evaluator
Donaldson, J.S.
Eastern Arc Mountains & Coastal Forests CEPF Plant Assessment Project & Bösenberg, J.D. 2024. Encephalartos tegulaneus. The IUCN Red List of Threatened Species 2024: e.T41911A51049496. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Observations & statuts
Cartographie