Ancistrorhynchus crystalensis
P.J.Cribb & Laan
Pas d'interactions documentées pour cette espèce.
Liste rouge IUCN
EN · En dangercritères B2ab(ii,iii,iv,v)↘Décroissante- Évaluation
- 2018 · v3.1
- Altitude
- 100 – 930 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
This species is known from 11 subpopulations representing five locations. The current population trend is decreasing since the habitat of one subpopulation is threatened by the construction of the dam of Kinguélé II. Its number of individuals is not known and cannot be estimated since the species is epiphyte.
Menaces identifiées(4 menaces classées CMP-IUCN)
2_1_1Shifting agricultureOngoing2_2_1Small-holder plantationsOngoing5_3_3Unintentional effects: (subsistence/small scale) [harvest]Ongoing7_2_11Dams (size unknown)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The fifth location of Ancistrorhynchus crystalensis is situated within sites in unprotected areas, that are fairly accessible to people living in the vicinity. Human pressure to meet domestic needs (in particular from shifting agriculture and firewood) is possible but should be quite limited. However, the future construction of the dam of Kinguélé II will lead to the loss of this fifth subpopulation.
Habitats préférentiels (classification IUCN)
1_6Forest - Subtropical/Tropical Moist Lowland1_9Forest - Subtropical/Tropical Moist Montane
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
Of the five known locations of Ancistrorhynchus crystalensis, four occurred within protected areas in Cameroon (Campo Ma’an National Park), Rio Muni (Monte Alén National Park), Príncipe Island (Pico Mesa and Pico Papagaio) and Gabon (Crystal Mountains). Ancistrorhynchus crystalensis is easily being grown in shade houses in Central Africa (Bom Successo in São Tomé, Yaoundé in Cameroon, Libreville, Tchimbélé and the Sibang Arboretum in Gabon). Seed banking is underway for this species in Yaoundé.
Actions de conservation (4)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection1_2Resource & habitat protection4_1Formal education4_3Awareness & communications
Stress écologiques (12)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_2Species disturbance2_2Species disturbance2_2Species disturbance2_2Species disturbance2_3_7Reduced reproductive success2_3_7Reduced reproductive success2_3_7Reduced reproductive success
Priorités de recherche (5)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_5Threats3_1Population trends3_4Habitat trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Systèmes (terrestre/eau douce/marin)
Formes de croissance
Références bibliographiques (6)Sources scientifiques de l'évaluation IUCNExpert
- IUCN. 2018. The IUCN Red List of Threatened Species. Version 2018-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 28 June 2018).
- IUCN Standards and Petitions Subcommittee. 2016. Guidelines for Using the IUCN Red List Categories and Criteria. Version 12. Prepared by the Standards and Petitions Subcommittee. Available at: <a href="http://www.iucnredlist.org/documents/RedListGuidelines.pdf">http://www.iucnredlist.org/documents/RedListGuidelines.pdf</a>.
- Onana, J.-M. 2013. <i>Synopsis des espèces végétales vasculaires endémiques et rares du Cameroun. Check-liste pour la conservation de la biodiversité</i>. Ministère de la Recherche Scientifique et de l'Innovation (MINRESI), Yaoundé, Cameroon.
- Pollard, B.J. 2011. Orchidaceae. In: J.M. Onana and M. Cheek (eds), <i>Red Data Book of the Flowering Plants of Cameroon: IUCN Global Assessments</i>, pp. 383-421. Kew Publishing, Kew.
- Droissart, V. 2009. Etude taxonomique et biogéographique des plantes endémiques d’Afrique centrale atlantique: le cas des Orchidaceae. Laboratoire de Botanique systématique et de Phytosociologie, Université Libre de Bruxelles.
- Droissart, V., Sonké, B. and Stévart, T. 2006. Les Orchidaceae endémiques d'Afrique centrale atlantique présentes au Cameroun. <i>Systematics and Geography of Plants</i> 76(1): 3-84.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
Simo-Droissart, M., Stévart, T., Pollard, B.J. & Droissart, V. 2018. Ancistrorhynchus crystalensis. The IUCN Red List of Threatened Species 2018: e.T87583266A87739837. 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