Encephalartos macrostrobilus
S.Jones & Wynants
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
- 2024 · v3.1
- Altitude
- 900 – 1400 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
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_2Small-holder grazing, ranching or farmingRapid DeclinesMajority (50-90%)Ongoing5_2_1Intentional use (species is the target)Slow, Significant DeclinesWhole (>90%)Ongoing3_2Mining & quarryingOngoing5_3_5Motivation Unknown/UnrecordedOngoing6_3Work & other activitiesOngoing7_1_1Increase in fire frequency/intensityOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
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 recommandéesStratégies de conservation IUCNExpert
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)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection2_1Site/area management4_3Awareness & communications6_1Linked enterprises & livelihood alternatives
Stress écologiques (9)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (2)Use & Trade — IUCNExpert
12Handicrafts, jewellery, etc.subsistance13Pets/display animals, horticultureinternationalnational
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_4Harvest, use & livelihoods1_6Actions3_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 - small
Références bibliographiques (5)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).
- 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.
- 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.
- 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.
- 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)Personnes ayant contribué à l'évaluation IUCNExpert
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.
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