Ontologia
Albany Cycad

Albany Cycad

Encephalartos latifronsLehm.

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

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Calcul du tissu écologique de Encephalartos latifrons.

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

Liste rouge IUCN

CR · En danger critiquecritères A2acd; C1+2a(i)Décroissante
Évaluation complète
Évaluation
2022 · v3.1
Altitude
200600 m
Profondeur
m
État de la populationExpert
The current wild population is estimated at 70 mature individuals based on recent surveys as part of a PhD study (Swart 2019) and additional surveys to collect DNA material in 2020. This includes plants not previously captured in surveys such as those carried out to gather DNA material, where fewer than 60 plants were recorded in the wild (Da Silva et al. 2012).

A study of the conservation genetics of both in situ and ex situ subpopulations of Encephalartos latifrons (Da Silva et al. 2012) showed that there is relatively little variation between subpopulations suggesting that all the remaining plants belong to what was once a single large population with relatively high levels of geneflow between subpopulations. The study also showed that there is a high level of genetic variation within the remaining population (high proportions of polymorphic loci, moderate to high Nei’s and Shannon’s diversity indices, as well as moderate levels of heterozygosity). This is greater than in many other cycad species where there tends to be low genetic variation within populations.

Menaces identifiées(3 menaces classées CMP-IUCN)

  • 2_1_3
    Agro-industry farming
    Slow, Significant DeclinesMinority (<50%)Past, Unlikely to Return
  • 2_1_2
    Small-holder farming
    Past, Unlikely to Return
  • 5_2_1
    Intentional use (species is the target)
    Very Rapid DeclinesMajority (50-90%)Ongoing
Description complète des menacesExpert
Encephalartos latifrons now occurs in areas where the predominant land uses are cultivation (pineapples and chicory) as well as stock farming. The impact of land use on E. latifrons is difficult to assess, but the early reports of Pearson (unpublished letters) and Chamberlain (1919) imply that at least some habitat was lost as a result of agricultural activity. Repeat photography, using photographs first taken between 1906 and 1945, indicated that all the plants occurring at seven different sites had disappeared by 1996 (Donaldson and Bösenberg 1999). However, this cannot be attributed directly to land use as, in most cases, the areas in which the plants occurred were neither ploughed nor cleared.

Trade in cycads is currently the greatest threat and probably explains the decline observed in the repeat photography study. The removal of relatively large numbers of plants by collectors has been recorded with some plants recovered by law enforcement and conservation agencies. The demand for wild collected plants remains high because E. latifrons is regarded as scarce and it is one of the most highly valued species in the cycad trade.

Population modelling of other species of Encephalartos (Raimondo and Donaldson 2003) showed that species such as E. latifrons are extremely sensitive to the removal of adult plants because population persistence over long periods relies on adult survival and not seedling recruitment. As a result, the species is very vulnerable to trade in mature plants.

It also seems likely that the natural pollinators are extinct. No natural seed set has been recorded in recent years and the current cohort of adult plants indicates that the last recruitment event was more than 50 years ago.

Habitats préférentiels (classification IUCN)

  • 3_5Shrubland - Subtropical/Tropical Dry
  • 3_8Shrubland - Mediterranean-type Shrubby Vegetation
  • 4_5Grassland - Subtropical/Tropical Dry
Mesures de conservation recommandéesExpert
This species is listed in Appendix I of the CITES Appendices and is listed in the national Threatened or Protected Species regulations, which prohibit trade in wild plants. None of the plants occur naturally within any reserves but mature plants were replanted in one reserve after they were illegally removed from the wild. These plants are now established but no natural reproduction takes place due to the absence of insect pollinators.

A Population and Habitat Viability Assessment was developed in July 2006 and this was followed by the development of a species management plan in 2009. The plan has been implemented since 2010.

Ex situ conservation collections have also been established at several botanic gardens. One of the largest, is at Kirstenbosch National Botanical Garden, which has 19 mature plants. Genetic studies showed that the Kirstenbosch collection has similar levels of genetic diversity to wild stocks and represents all wild genotype groups.
Actions de conservation (4)Expert
  • 1_1Site/area protection
  • 2_1Site/area management
  • 3_3_1Reintroduction
  • 4_3Awareness & communications
Stress écologiques (7)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_3_4Loss of pollinator
  • 2_3_8Other
Usage & commerce (2)Expert
  • 13Pets/display animals, horticulture
    internationalnational
  • 16Establishing ex-situ production *
    national
Priorités de recherche (4)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
  • 1_5Threats
  • 3_1Population trends
Niche IUCN globaleExpert

Royaumes biogéographiques

Afrotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - large
Références bibliographiques (17)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. Swart, C., Rowswell, R., Donaldson, J. and Barker, N. 2019. Population structure and survival of the critically endangered cycad <i>Encephalartos latifrons</i> in South Africa. <i>South African Journal of Botany</i> 127: 80-90.
  4. Swart, C. 2019. The conservation, ecology, and distribution of the critically endangered <i>Encephalartos latifrons</i> Lehm. Department of Botany, Rhodes University.
  5. Scientific Authority. 2016. <i>Non-Detriment Findings</i>. Government Gazette, Department of Environmental Affairs.
  6. Scientific Authority. 2013. <i>National Environmental Management: Biodiversity Act (10/2004): Non-detriment findings</i>. Government Printer, Pretoria.
  7. Da Silva, J.M., Donaldson, J.S., Reeves, G. and Hedderson, T.A. 2012. Population genetics and conservation of critically small cycad populations: a case study of the Albany Cycad, <i>Encephalartos latifrons</i> (Lehmann). <i>Biological Journal of the Linnean Society</i> 105: 293-308.
  8. Department of Environmental Affairs. 2011. Biodiversity Management Plan for <i>Encephalartos latifrons</i>. Pretoria.
  9. Daly, B., Donaldson, J.S., Friedmann, Y., Hahndiek, Q., King, N. Newton, D. and Southwood, A. (editors). 2006. Albany Cycad (<i>Encephalartos latifrons</i>) Population and Habitat Viability Assessment Workshop Report. Conservation Breeding Specialist Group (SSC / IUCN) / CBSG Southern Africa. Endangered Wildlife Trust, Johannesburg.
  10. Raimondo, D.C. and Donaldson, J.S. 2003. Responses of cycads with different life histories to the impact of plant collecting: simulation models to determine important life history stages and population recovery times. <i>Biological Conservation</i> 111: 345-358.
  11. Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
  12. Goode, D. 2001. <i>Cycads of Africa</i>. D & E Cycads of Africa, Gallo Manor, Johannesburg, South Africa.
  13. Donaldson, J.S, and Bösenberg, J.D. 1999. Changes in the abundance of South African cycads during the 20th century: preliminary data from the study of matched photographs. In: C.-J. Chen (ed.), <i>Biology and Conservation of Cycads. Proceedings of the 4th International Conference on Cycad Biology</i>, Academic Publishers, Beijing.
  14. Norstog, K.J. and Nicholls, T.J. 1997. <i>The Biology of the Cycads</i>. Cornell University Press, Ithaca, New York, USA.
  15. Goode, D. 1989. <i>Cycads of Africa</i>. Struik Winchester, Cape Town.
  16. Kemp, M. 1986. Focus on <i>Encephalartos latifrons</i>. <i>Encephalartos</i> 8: 8-15.
  17. Chamberlain, C.J. 1919. <i>The Living Cycads</i>. The University of Chicago Press, Chicago.
Évaluateurs & contributeurs (3)Expert
assessor
Bösenberg, J.D.
contributor
Donaldson, J.S.
evaluator
Donaldson, J.S.
1 erratum publié après l'évaluation.

Bösenberg, J.D. 2022. Encephalartos latifrons (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T41892A243428451. 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

Consulter sur les bases externes

Observations & statuts

Cartographie

Bibliographie

Note nomenclaturale & synonymesExpert

Note nomenclaturale

TAXREF v18 — INPN/MNHN

Synonymes (3)— redirigent vers cette page

  • Encephalartos horridus subsp. latifrons(Lehm.) Miq.
  • Encephalartos horridus var. latifrons(Lehm.) Miq.
  • Encephalartos horridus var. latifrons(Lehm.) J.Schust.

Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).