Sclavo's Cycad
Encephalartos sclavoiA.Moretti, D.W.Stev. & De Luca
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Encephalartos sclavoi.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères B1ab(iii,v)+2ab(iii,v); C2a(i)↘Décroissante- Évaluation
- 2024 · v3.1
- Altitude
- 1800 – 2100 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
The population size was originally estimated as 5,000-6,000 mature individuals. Reports from ca. 2008 (e.g. S. Trollip pers. comm. 2008) indicated that populations were declining and plants were difficult to find. A recent study (Andrew 2017) recorded only 146 mature individuals in the wild. The type locality had only 10 adult plants and 9 juveniles. Although there are apparently five or six small sub-populations occurring along a mountain ridge, the area is more or less contiguous and is regarded as a single location because of the nature of the threats.
Menaces identifiées(5 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)Rapid DeclinesMajority (50-90%)Ongoing7_1_1Increase in fire frequency/intensityUnknownMajority (50-90%)Ongoing2_2_2Agro-industry plantationsSlow, Significant DeclinesMajority (50-90%)Ongoing1_1Housing & urban areasOngoing2_1_2Small-holder farmingOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The seeds are harvested for medicinal purposes by traditional healers and there is also collecting by cycad poachers. The area is in a prime forestry and agricultural area, so the habitat is already and is likely to continue being impacted. The area, because of its elevation has a mild climate and is considered an ideal place to live. So increases in human settlement and further changes in land use are likely. Natural and man made fires destroy seed and seedlings.
Habitats préférentiels (classification IUCN)
4_7Grassland - Subtropical/Tropical High Altitude★6Rocky areas (eg. inland cliffs, mountain peaks)★1_9Forest - Subtropical/Tropical Moist Montane
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
It is listed in CITES Appendix I. It occurs in the Shume Magamba Forest Reserve. 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 subpopulations will support the conservation of this species.
Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection4_3Awareness & communications
Stress écologiques (12)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_1Species mortality2_1Species mortality2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (2)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternational3Medicine - human & veterinarysubsistance
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_5Threats3_1Population trends3_4Habitat trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Afrotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadTree - small
Références bibliographiques (10)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).
- Andrew, S.M. 2017. Distribution, population structure and threats of an endangered cycad - <i>Encephalartos sclavoi</i> in Tanzania. Department of Ecosystems and Conservation, College of Forestry, Wildlife and Tourism, Sokoine University of Agriculture, Chuo Kikuu, Morogoro, Tanzania.
- 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.
- 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.
- Osborne, R. 1995. The Heenan expeditions revisited. <i>Encephalartos</i> 43: 16-23.
- Slabbert, R. and Hurter, H. 1994. Focus on <i>Encephalartos sclavoi</i>. <i>Encephalartos</i> 37: 4-8.
- Stevenson, D.W., Moretti, A. and De Luca, P. 1990. A new species of <i>Encephalartos</i> (Zamiaceae) from Tanzania. <i>Memoirs of the New York Botanic. Garden</i> 57: 156-161.
- Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
- Prain, D. 1917. <i>Flora of Tropical Africa; Cycadaceae</i>. L.Reeve & Co. Ltd., Kent.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Andrew, S. & Bösenberg, J.D.
contributor
Eastern Arc Mountains & Coastal Forests CEPF Plant Assessment Project, Donaldson, J.S. & Trollip, S.
evaluator
Donaldson, J.S.
Andrew, S. & Bösenberg, J.D. 2024. Encephalartos sclavoi. The IUCN Red List of Threatened Species 2024: e.T41924A51044974. 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