Cycas dolichophylla
K.D.Hill, T.H.Nguyên & P.K.Lôc
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cycas dolichophylla.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
NT · Quasi menacéecritères A4cd↘Décroissante- Évaluation
- 2023 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
This species is locally frequent across its distribution range. There is some evidence of declines in parts of its range due to habitat destruction and collecting in the region, that is suspected to be causing an ongoing population decline of between 15 and 25% over 30 years. This is well within the three generation time period (120 years), but further extrapolation is difficult and so this is treated here as the minimum population decline.
Menaces identifiées(2 menaces classées CMP-IUCN)
5_2_1Intentional use (species is the target)Ongoing5_3_3Unintentional effects: (subsistence/small scale) [harvest]Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The predominant threat is habitat loss. Several subpopulations have been severely depleted over past decades through deforestation and collecting for the horticultural trade. The ongoing reduction is estimated to be between 15 and 25% over a 30 year period. The consensus is that there are still large subpopulations and overall decline has not yet reached the point where the species is threatened.
Habitats préférentiels (classification IUCN)
14_6Artificial/Terrestrial - Subtropical/Tropical Heavily Degraded Former Forest1_6Forest - Subtropical/Tropical Moist Lowland
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. Plants are found in the Ben En National Park and Na Hang Nature Reserve, Viet Nam. Cycas dolichophylla is also scattered in Gulinqing Nature Reserve and Dawei Mountain Nature Reserve in Yunnan, China. An education and awareness programme as well as the long-term monitoring of subpopulations will support the conservation of this species.
Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert
1_1Site/area protection4_3Awareness & communications
Stress écologiques (3)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation2_1Species mortality
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational
Priorités de recherche (1)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Indomalayan
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadShrub - large
Références bibliographiques (8)Sources scientifiques de l'évaluation IUCNExpert
- 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).
- Zheng, Y., Liu, J., Feng, X. and Gong, X. 2017. The distribution, diversity, and conservation status of <i>Cycas</i> in China. <i>Ecology and Evolution</i> 7: 3212-3224.
- Averyanov, L.V., Nguyen, T.H., Sinh, K.N., Pham, T.V., Lamxay, V., Bounphanmy, S., Lorphengsy, S., Phan, L.K., Lanorsavanh, S. and Chantthavongsa, K. 2014. Gymnosperms of Laos. <i>Nordic Journal of Botany</i> 32(6): 765–805. doi: 10.1111/njb.00498.
- Hill, K.D. 2008. The genus <i>Cycas</i> (Cycadaceae) in China. <i>Telopea</i> 12(1): 71-118.
- Hill K.D., Nguyen, H.T. and Loc, P.K. 2004. The Genus <i>Cycas</i> (Cycadaceae) in Vietnam. <i>The Botanical review</i> 70(2): 134-193.
- Donaldson, J.S. (ed.). 2003. <i>Cycads. Status Survey and Conservation Action Plan</i>. IUCN/SSC Cycad Specialist Group. IUCN, Gland, Switzerland and Cambridge, UK.
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
- Hill, K.D. and Stevenson, D.W. 1998 - 2006. The Cycad Pages. Available at: <a href="http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/index.html">http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/index.html</a>.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D.
contributor
Nguyen, T.H.
evaluator
Donaldson, J.S.
Bösenberg, J.D. 2023. Cycas dolichophylla. The IUCN Red List of Threatened Species 2023: e.T42053A68900008. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
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Observations & statuts
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