Ontologia

Encephalartos macrostrobilus

S.Jones & Wynants

CRLR Monde (IUCN)
Pays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Encephalartos macrostrobilus.

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

Liste rouge IUCN

CR · En danger critiquecritères B1ab(ii,iii,v); C2a(ii)Décroissante
Évaluation complète
Évaluation
2024 · v3.1
Altitude
9001400 m
Profondeur
m
État de la populationExpert
The population was previously estimated to comprise 200 to 300 mature individuals (Donaldson 2010) but this was not based on actual counts. A detailed study undertaken in 2018, and comprising surveys and interviews with surrounding communities, identified 181 mature plants (Ojelel et al. 2022).

Menaces identifiées(6 menaces classées CMP-IUCN)

  • 2_3_2
    Small-holder grazing, ranching or farming
    Rapid DeclinesMajority (50-90%)Ongoing
  • 5_2_1
    Intentional use (species is the target)
    Slow, Significant DeclinesWhole (>90%)Ongoing
  • 3_2
    Mining & quarrying
    Ongoing
  • 5_3_5
    Motivation Unknown/Unrecorded
    Ongoing
  • 6_3
    Work & other activities
    Ongoing
  • 7_1_1
    Increase in fire frequency/intensity
    Ongoing
Description complète des menacesExpert
Over 90% of the population of Encephalartos macrostrobilus occurs on land communally owned by the local communities. The main socio-economic activity is subsistence agriculture. Tree felling for timber, charcoal burning and cutting of poles for construction are carried out and indiscriminate burning is done every year to generate new pastures. There is also widespread stone quarrying because of the many granitic rock outcrops. These activities continue to pose the greatest threat to habitat quality and survival of the cycad. These activities are not about to cease but rather intensify in the foreseeable future. Only a small percentage (<5%) of the cycad population is covered within the Era Central Forest Reserve. Unfortunately, this does not provide it any better protection as there is no effective management and protection of the reserve (Ojelel et al. 2022). There is also some demand for specimens of this species from plant collectors, and its seeds are used by immigrants from South Sudan as ‘beads’ they tie round the waist and neck of their children to dispel ‘bad omens’. This reduces the regeneration potential of the cycad. Occasionally, there is cutting of the cycad leaves off the trees for no known purpose. There is also a dense network of foot paths further degrading the habitat.

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. Approximately 5% of the known population occurs in the Era Central Forest Reserve. Other conservation actions that would enhance conservation include: enhancing awareness among the local populace on cycad conservation; developing nature-based solutions such as bee-keeping and eco-tourism (based on this rare species) to provide alternative livelihoods that would reduce the impact on the species; buying the community land with the cycads and annexing it to the adjacent Era Central Forest Reserve; and improving management of Era Central Forest Reserve.
Actions de conservation (4)Expert
  • 1_1Site/area protection
  • 2_1Site/area management
  • 4_3Awareness & communications
  • 6_1Linked enterprises & livelihood alternatives
Stress écologiques (9)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_3_7Reduced reproductive success
Usage & commerce (2)Expert
  • 12Handicrafts, jewellery, etc.
    subsistance
  • 13Pets/display animals, horticulture
    internationalnational
Priorités de recherche (5)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
  • 1_4Harvest, use & livelihoods
  • 1_6Actions
  • 3_1Population trends
Niche IUCN globaleExpert

Royaumes biogéographiques

Afrotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - small
Références bibliographiques (5)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. Ojelel,S., Mucunguzi, P. and Kalema, J. 2022. Population size, sex ratio and their implications on conservation status of <i>Encephalartos macrostrobilus</i> (Scott Jones & Jeff Wynants) in Uganda. <i>Encephalartos</i> 139: 6-10.
  3. Ojelel, S. and Anywar, D. 2017. Status of <i>Encephalartos macrostrobilus</i> (Scott Jones & Wynants Jeff) in Agoro Agu Central Forest Reserve, Uganda. <i>Encephalartos</i> 129: 11-15.
  4. Donaldson, J.S. 2010. <i>Encephalartos macrostrobilus</i>. <i>The IUCN Red List of Threatened Species</i> 2010: e.T41918A10595573. https://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T41918A10595573.en.
  5. Jones, S. and Wynants, J. 1997. <i>Encephalartos macrostrobilus</i> (Zamiaceae), a new cycad species from northern Uganda. <i>Encephalartos</i> 50: 13-17.
Évaluateurs & contributeurs (3)Expert
assessor
Eastern Arc Mountains & Coastal Forests CEPF Plant Assessment Project & Bösenberg, J.D.
contributor
Donaldson, J.S. & Ojelel, S.
evaluator
Donaldson, J.S.

Eastern Arc Mountains & Coastal Forests CEPF Plant Assessment Project & Bösenberg, J.D. 2024. Encephalartos macrostrobilus. The IUCN Red List of Threatened Species 2024: e.T41918A51050953. 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

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