Dwarf Cycad
Encephalartos humilisI.Verd.
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Encephalartos humilis.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
VU · Vulnérablecritères A2acd+4acd; B1ab(iii,v)+2ab(iii,v)↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
The estimated population size of Encephalartos humilis is 4,500-9,500 mature individuals. The habitat of this species has been transformed through pine and eucalypt plantations that now occupy approximately 30% of its original habitat. Although this species has been regarded as difficult to transplant and therefore relatively unaffected by poaching, surveys of the Mondi Cycad Reserve in 2012 indicated that 150 plants had been removed, comprising an approximate 25% reduction in the ca. 600 plants counted in a census in 2006 (T. Suinyuy and J. Botha in litt. 2012).
Menaces identifiées(3 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)Rapid DeclinesWhole (>90%)Ongoing2_2_2Agro-industry plantationsSlow, Significant DeclinesMajority (50-90%)Ongoing7_1_2Supression in fire frequency/intensityOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species is threatened by the lack of natural fires in vast managed plantations and this possibly suppresses coning frequency. Many plants have also been removed for ornamental purposes. Reports indicate that in 2004 about 400 plants were removed in one consignment. Then in 2008 about 140 plants were removed in a further consignment. (D. Bösenberg - notes taken during NDF workshop.)
Habitats préférentiels (classification IUCN)
4_7Grassland - Subtropical/Tropical High Altitude
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix I of the CITES Appendices. Subpopulations are protected in the Mondi Cycad Reserve, Makobulaan Nature Reserve, Wonderkloof Nature Reserve, Buffelskloof Private Nature Reserve, Mbesan Natural Heritage Site and the Coetzeestroom Conservation area. An education and awareness programme as well as the long-term monitoring of subpopulations will support the conservation of this species.
Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert
1_2Resource & habitat protection2_1Site/area management4_3Awareness & communications
Stress écologiques (4)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation2_1Species mortality2_3_8Other
Usage & commerce (2)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational16Establishing ex-situ production *national
Priorités de recherche (3)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology3_1Population trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Afrotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadShrub - small
Références bibliographiques (6)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2023. The IUCN Red List of Threatened Species. Version 2023-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 07 December 2023).
- IUCN. 2022. The IUCN Red List of Threatened Species. Version 2022-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 21 July 2022).
- Jones, D.L. 2002. <i>Cycads of the World</i>. Smithsonian Institution Press, Washington, DC.
- Goode, D. 2001. <i>Cycads of Africa</i>. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
- Donaldson, J.S. 1995. Cycad conservation in South Africa - Issues, priorities and actions. Published by: Cycad Society of South Africa.
- Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D.
contributor
Steyn, T. & Donaldson, J.S.
evaluator
Donaldson, J.S.
⚠ 1 erratum publié après l'évaluation.
Bösenberg, J.D. 2022. Encephalartos humilis (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T41917A243427486. Accessed on 05 May 2026.
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
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