Dioscorea alatipes
Burkill & H.Perrier
Graphe en cours d’indexation
Calcul du tissu écologique de Dioscorea alatipes.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
VU · Vulnérablecritères B1ab(ii,iii,v)+2ab(ii,iii,v)↘Décroissante- Évaluation
- 2017 · v3.1
- Altitude
- 0 – 200 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Dioscorea alatipes is only found around the Toliara area where suitable habitat is present, however there are no population estimates available for this species. However, the current population trend, number of mature individuals and number of subpopulations are inferred to be decreasing due to habitat loss and over harvesting of tubers from the wild.
Menaces identifiées(3 menaces classées CMP-IUCN)
1_1Housing & urban areasVery Rapid DeclinesUnknownFuture2_1_1Shifting agricultureVery Rapid DeclinesUnknownFuture5_2_1Intentional use (species is the target)Very Rapid DeclinesUnknownOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Many of the sites where Dioscorea alatipes has been found are in areas without formal protection. This presents risks in the form of expansion of agricultural land, although limestone soils are poor for farming; and expansion of settlements. Over-extraction of tubers also presents a threat to populations (Andriamparany et al. 2014).
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry★
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
At least one population lies within the Onilahy protected area but is not actively managed. Dioscorea alatipes also occurs in Tsimanampetsotsa National Park where it is found in the wild (Andriamparany et al. 2014) and is also cultivated as part SuLaMa project (H. V. Andriamparany pers. comm. 2015). No ex situ collections are listed on GeneSys and ex situ conservation is recommended.
Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection1_2Resource & habitat protection3_4_2Genome resource bank
Stress écologiques (9)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_2Species disturbance2_2Species disturbance2_2Species disturbance2_3_7Reduced reproductive success
Usage & commerce (1)Use & Trade — IUCNExpert
1Food - humansubsistance
Priorités de recherche (8)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_4Harvest, use & livelihoods1_5Threats1_6Actions3_1Population trends3_2Harvest level 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. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 5 December 2017).
- SuLaMa. 2015. The project SuLaMa website. Available at: <a href="http://www.sulama.de/">http://www.sulama.de/</a>. (Accessed: 05/08/2015).
- Andriamparany, J.N., Brinkmann, K., Jeannoda, V. and Buerkert, A. 2014. Effects of socio-economic household characteristics on traditional knowledge and usage of wild yams and medicinal plants in the Mahafaly region of south-western Madagascar. <i>Journal of Ethnobiology and Ethnomedcine</i> 10: 82. DOI:10.1186/1746-4269-10-82.
- Bachman, S., Moat, J., Hill, A.W., de la Torre, J. and Scott, B. 2011. Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. <i>ZooKeys</i>: 117-126.
- Tostain, S., Cheban, A.S., Damson, S., Mananjo H. and Rejo-Fienena F. 2009. Les espèces d’ignames (<i>Dioscorea</i> sp.) dans le Sud de Madagascar, inventaires et aires de répartition. In: Les ignames malgaches, une ressource à préserver et à valoriser. In: S. Tostain and F. Rejo-Fienena (eds), Les ignames malgaches, une ressource à préserver et à valoriser. Actes du colloque de Toliara, Madagascar.
- Burkill, I.H. and Perrier, H. 1950. Dioscoréacées. In: H. Humbert (ed.), <i>Flore de Madagascar et des Comores. Vol. 44</i>, Typographie Firmin-Didot et cie, Paris.
Évaluateurs & contributeurs (4)Personnes ayant contribué à l'évaluation IUCNExpert
Kennerley, J. A. & Wilkin, P. 2017. Dioscorea alatipes. The IUCN Red List of Threatened Species 2017: e.T66769381A66769384. Accessed on 05 May 2026.