Ontologia
Kenyan Giant Cycad

Kenyan Giant Cycad

Encephalartos tegulaneusMelville

LCLR Monde (IUCN)
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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 mineureStable
Évaluation complète
Évaluation
2024 · v3.1
Altitude
12002300 m
Profondeur
m
État de la populationExpert
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_1
    Intentional use (species is the target)
    Negligible declinesMinority (<50%)Ongoing
  • 5_3_3
    Unintentional effects: (subsistence/small scale) [harvest]
    Negligible declinesMinority (<50%)Ongoing
  • 12_1
    Other threat
    UnknownMinority (<50%)Unknown
  • 5_3_1
    Intentional use: (subsistence/small scale) [harvest]
    UnknownMinority (<50%)Ongoing
  • 7_2_10
    Large dams
    UnknownUnknownFuture
  • 2_1_4
    Scale Unknown/Unrecorded
    Ongoing
Description complète des menacesExpert
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 Dry
  • 2_1Savanna - Dry
  • 6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesExpert
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)Expert
  • 1_1Site/area protection
  • 3_4_1Captive breeding/artificial propagation
  • 4_3Awareness & communications
Stress écologiques (8)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_1Species mortality
  • 2_3_7Reduced reproductive success
Usage & commerce (2)Expert
  • 11Other household goods
    subsistance
  • 13Pets/display animals, horticulture
    internationalnational
Priorités de recherche (6)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
  • 1_4Harvest, use & livelihoods
  • 1_5Threats
  • 1_6Actions
  • 3_1Population trends
Niche IUCN globaleExpert

Royaumes biogéographiques

Afrotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - large
Références bibliographiques (11)Expert
  1. 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).
  2. Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
  3. Goode, D. 2001. <i>Cycads of Africa</i>. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
  4. 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.
  5. Osborne, R. 1995. The Heenan expeditions revisited. <i>Encephalartos</i> 43: 16-23.
  6. 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.
  7. Beentje, H. 1994. <i>Kenya Trees, Shrubs and Lianas</i>. National Museums of Kenya, Nairobi.
  8. 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.
  9. Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
  10. Heenan, D. 1977. Some observations on the cycads of Central Africa. <i>Botanical Journal of the Linnean Society</i> 74: 279-288.
  11. Melville, R. 1957. <i>Encephalartos</i> in Central Africa. <i>Kew Bulletin</i> 12: 237-257.
Évaluateurs & contributeurs (3)Expert
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.

Répartition mondiale (heatmap GBIF)Construction en cours

0 obs · 0 cellules
Construction par partitions temporelles GBIF0%

Source : GBIF — observations agrégées par hexagones 0.2° × 0.2° (~22km). Filtre qualité : précision coordonnée < 10 km. Coloration quantile (q50/70/90/99). Fond carte : OpenFreeMap · © OpenStreetMap.

Distribution mondiale

Calcul de la distribution GBIF· ~10–60 s

Phénologie

Calcul du calendrier d'apparition· ~5–30 s

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Observations & statuts

Cartographie

Bibliographie