Encephalartos mackenziei

L.E.Newton

Plante

CRLR Monde (IUCN)

Filtrer le graphe par contexte spatialPays · région · aire protégée · écorégion · biome

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Calcul du tissu écologique de Encephalartos mackenziei.

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Liste rouge IUCN

CR · En danger critiquecritères B1ab(i,ii,iii)?Inconnue

Évaluation complète

Évaluation: 2024 · v3.1
Altitude: 1800 – 2000 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

The population is poorly known. Reports are that the population in the Didinga hills is quite large. It is reported that E. mackenziei is distributed over a wide area around the type locality and the colony is large (Newton 2002). A CEPF funded project in South Sudan did not manage to reach E. mackenziei and has since been abandoned due to the security situation there (Q. Luke pers. comm. 2016).

Menaces identifiées(2 menaces classées CMP-IUCN)

2_3_4
Scale Unknown/Unrecorded
Ongoing
5_2_1
Intentional use (species is the target)
Unknown

Description complète des menacesTexte détaillé évaluation IUCNExpert

There are unconfirmed reports of large numbers of plants being removed from the wild by collectors (allegedly "truck-loads"). In fact, the difficult security situation in this area has probably prevented any poaching of plants by collectors (Q. Luke pers. comm.) Habitat destruction due to agricultural practices may also have an effect on the population and this is evident from aerial photographs of the habitat surrounding the type locality and from the rest of the distribution area.

Habitats préférentiels (classification IUCN)

2_1Savanna - Dry
6Rocky areas (eg. inland cliffs, mountain peaks)

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

This species is listed in Appendix I of the CITES Appendices. An education and awareness programme as well as the long-term monitoring of the population will support the conservation of this species.

Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert

1_1Site/area protection
4_3Awareness & communications

Stress écologiques (3)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_2Ecosystem degradation
2_1Species mortality

Usage & commerce (1)Use & Trade — IUCNExpert

13Pets/display animals, horticulture
internationalnational

Priorités de recherche (5)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
1_3Life history & ecology
1_4Harvest, use & livelihoods
1_6Actions
3_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 (6)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).
Newton, L.E. 2002. A new species of Encephalartos (Zamiaceae) in Sudan. Botanical Journal of the Linnean Society 140: 187-192.
Goode, D. 2001. Cycads of Africa. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: <a href="http://plantnet.rbgsyd.gov.au/PlantNet/cycad/">http://plantnet.rbgsyd.gov.au/PlantNet/cycad/</a>.
Friis, I.B. and Vollesen, K. 1998. Flora of the Sudan-Uganda border area east of the Nile. 1, Catalogue of vascular plants, 1st part. The Royal Danish Academy of Science and Letters, Copenhagen.
Goode, D. 1989. Cycads of Africa. Struik Winchester, Cape Town.

Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Bösenberg, J.D.

contributor

Donaldson, J.S. & Luke, W.R.Q.

evaluator

Donaldson, J.S.

Bösenberg, J.D. 2024. Encephalartos mackenziei. The IUCN Red List of Threatened Species 2024: e.T178878A51050467. Accessed on 05 May 2026.