Ontologia
Olifants River Cycad

Olifants River Cycad

Encephalartos lanatusStapf & Burtt Davy

VULR Monde (IUCN)
1 photo · Licences CC (Wikimedia Commons / iNaturalist)Click pour agrandir
Pays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Encephalartos lanatus.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

VU · Vulnérablecritères B1ab(v)+2ab(v)Décroissante
Évaluation complète
Évaluation
2022 · v3.1
Altitude
12001500 m
Profondeur
m
État de la populationExpert
This is a locally abundant species and was previously regarded as stable due to landuse that was compatible with its survival. The populations were also relatively safe as they were not popular with cycad collectors due to their known sensitivity to disturbance and poor transplanting outcomes (Goode 1993). However, this situation seems to have changed and plants are now being illegally removed by collectors resulting in a decline in population numbers (T. Steyn pers. comm.)

Menaces identifiées(2 menaces classées CMP-IUCN)

  • 3_2
    Mining & quarrying
    UnknownUnknownFuture
  • 5_2_1
    Intentional use (species is the target)
    Slow, Significant DeclinesMinority (<50%)Ongoing
Description complète des menacesExpert
The agricultural development of the distribution area of Encephalartos lanatus would have had a minimal effect on the species due to the types of farming practices employed (Fourie 1984). The species was, in the past, also reportedly not popular with cycad collectors as these plants are sensitive to disturbance and any transplanting ends in the death of plants (Goode 1993). However, two changes now pose greater threats to this species. First, since 2015 there has been an increase in illegal collecting and this has now been recorded from a number of sites (T. Steyn pers. comm.) and, second, mining companies have applied for rights to mine in the core of the main distribution area (S. Sidersky pers. comm.)

Habitats préférentiels (classification IUCN)

  • 3_5Shrubland - Subtropical/Tropical Dry
  • 4_5Grassland - Subtropical/Tropical Dry
  • 6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesExpert
This species is listed in Appendix I of the CITES Appendices. In Gauteng province, this species is conserved in two private nature reserves and in a natural heritage site. Plants also occur in the Loskop Dam Nature Reserve and in the Botshabelo Nature Reserve. 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)Expert
  • 1_1Site/area protection
  • 4_3Awareness & communications
Stress écologiques (4)Expert
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_2Species disturbance
Usage & commerce (2)Expert
  • 13Pets/display animals, horticulture
    internationalnational
  • 16Establishing ex-situ production *
    national
Priorités de recherche (3)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
  • 3_1Population trends
Niche IUCN globaleExpert

Royaumes biogéographiques

Afrotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadShrub - large
Références bibliographiques (5)Expert
  1. 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).
  2. 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).
  3. Goode, D. 1993. <i>Cycads of Africa</i>. Struik, Winchester.
  4. Osborne, R. 1988. Focus on <i>Encephalartos lanatus</i>. <i>Encephalartos</i> 16: 3-9.
  5. Fourie, S.P. 1984. Flora Conservation Plan: <i>Encephalartos lanatus</i>. Transvaal Nature Conservation Division. Internal report.
Évaluateurs & contributeurs (3)Expert
assessor
Bösenberg, J.D.
contributor
Donaldson, J.S. & Steyn, T.
evaluator
Donaldson, J.S.
1 erratum publié après l'évaluation.

Bösenberg, J.D. 2022. Encephalartos lanatus (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T41933A243428225. 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