Aloe beankaensis
Letsara, Rakotoar. & Almeda
Pays · région · aire protégée · écorégion · biome
Pas d'interactions documentées pour cette espèce.
Liste rouge IUCN
CR · En danger critiquecritères B2ab(i,ii,iii); D→Stable- Évaluation
- 2018 · v3.1
- Altitude
- 150 – 250 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
The Beanka Forest population of Aloe beankaensis consists of about 15 mature individuals spread over an area of 10x2 m (Letsara et al. 2012). During a week of fieldwork in the area in February 2017 another population with three individuals was found 5 km south-east of the type locality. As the habitat of the species is very similar in Bemaraha we suspect the existence of a subpopulation in the northern limit of the park. It is estimated that the total population size for this species is no more than 50 individuals, but further field work is needed to confirm this estimate. The population of the species is located within Beanka protected area where all human activities are strictly regulated and access is difficult due to the morphology of the geology. Therefore the population is estimated to be stable.
Menaces identifiées(2 menaces classées CMP-IUCN)
7_1_3Trend Unknown/UnrecordedNegligible declinesMinority (<50%)Ongoing5_3_1Intentional use: (subsistence/small scale) [harvest]Slow, Significant DeclinesMinority (<50%)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The population of the species is located within Beanka protected area where all human activities are strictly regulated and due to the morphology of the geology, the habitat is very difficult to access. Data from Global Forest Watch (http://www.globalforestwatch.org) suggests slow, but continuous habitat loss across the range of this species due to small-scale wood harvesting and fires at the forest margins, mainly at the eastern edge of Beanka Protected Area, and this has been confirmed by personal observations from field trips in 2013 and 2017 by the Kew Madagascar Conservation Centre (KMCC) team.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
Despite the small size of known populations Beanka is a remote protected area with limited visitation by humans. The 14,000 ha Beanka Forest is essentially a northern extension of Tsingy de Bemaraha National Park that has been managed since late 2007 by Biodiversity Conservation Madagascar (BCM) and funded by Bioculture (Mauritius) Ltd. BCM is a Malagasy Association that focuses on forest conservation and restoration and the initiation of programs for socio-economic development of surrounding communities. The species is not yet banked at any genebank but several living collections have been planted at botanic gardens in Antananarivo e.g. Parc Botanique et Zoologique de Tsimbazaza.
As we do not have any information concerning the entire population range, size and trends, we recommend further study on the population. To ensure the survival of the species ex situ conservation works such seed banking and propagation of living collection within Botanic Gardens should be prioritised.
All species of Aloe are listed in CITES Appendix II.
As we do not have any information concerning the entire population range, size and trends, we recommend further study on the population. To ensure the survival of the species ex situ conservation works such seed banking and propagation of living collection within Botanic Gardens should be prioritised.
All species of Aloe are listed in CITES Appendix II.
Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert
3_4_2Genome resource bank4_3Awareness & communications
Stress écologiques (6)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_2Species disturbance2_2Species disturbance
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_4Harvest, use & livelihoods1_5Threats3_1Population trends3_4Habitat trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Afrotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
Succulent - shrub
Références bibliographiques (6)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2018. The IUCN Red List of Threatened Species. Version 2018-2. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 15 November 2018).
- Letsara, R., Rakotoarisoa, S., Almeda, F. 2012. Three new Aloe species from Madagascar. <i>Malagasy Nature</i> 6: 46-55.
- Carter, S., Lavranos, J.J., Newton, L.E. and Walker, C.C. 2011. <i>Aloes: The Definitive Guide</i>. Kew Publishing, Kew.
- Castillon, J.-B. and Castillon, J.-P. 2010. <i>Les Aloe de Madagascar/The Aloes of Madagascar</i>. J.-P. Castillon, La Réunion.
- Moat, J. and Smith, P. 2007. <i>Atlas of the Vegetation of Madagascar</i>. Royal Botanic Gardens, Kew, Kew.
- Humbert, H. and Cours Darne, G. 1965. <i>Carte internationale du tapis végétal et des conditions écologiques. Trois coupures à 1/1.000.000 de Madagascar.</i> Section Scientifique et Technique de l’Institut Français de Pondichéry.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Rakotoarisoa, S.E.
evaluator
Rakotonirina, N., Rakotonasolo, F. & Ralimanana, H.
institutions
Royal Botanic Gardens, Kew
Rakotoarisoa, S.E. 2018. Aloe beankaensis. The IUCN Red List of Threatened Species 2018: e.T85999299A100531939. Accessed on 05 May 2026.
Répartition mondiale
Aucune observation géoréférencée avec précision suffisante (<10 km) dans GBIF pour cette espèce.
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Observations & statuts
Cartographie