Ha Long Cycad
Cycas tropophyllaK.D.Hill & P.K.Lôc
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Pays · région · aire protégée · écorégion · biome
Pas d'interactions documentées pour cette espèce.
Liste rouge IUCN
VU · Vulnérablecritères A2c+4c; B1ab(iii,v)↘Décroissante- Évaluation
- 2023 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Cycas tropophylla is an abundant species typically found in habitats that have been regarded as relatively inaccessible but there has been an increase in collecting for ornamental purposes and habitat destruction. This is estimated to have been >30% over the past 50 years (less than 3 generations), but further extrapolation is not possible and so this is considered to be a minimum population reduction.
Menaces identifiées(3 menaces classées CMP-IUCN)
1_3Tourism & recreation areasUnknownUnknownOngoing2_1_2Small-holder farmingUnknownUnknownOngoing2_3_2Small-holder grazing, ranching or farmingUnknownUnknownOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
The main threat to this species is habitat loss for development and agriculture.
Habitats préférentiels (classification IUCN)
1_6Forest - Subtropical/Tropical Moist Lowland6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. Plants occur in the Cat Ba National Park within the Cat Ba Biosphere Reserve, an archipelago in northern Viet Nam, which is adjacent to the Ha Long Bay World Heritage site. An education and awareness programme as well as the long-term monitoring of subpopulations will support the conservation of this species.
Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert
4_3Awareness & communications
Stress écologiques (3)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation
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 - small
Références bibliographiques (6)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).
- Osborne, R. 2005. Focus on <i>Cycas tropophylla</i>. <i>Encephalartos</i> 82: 8-13.
- 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 (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D. & Nguyen, T.H.
evaluator
Donaldson, J.S.
Bösenberg, J.D. & Nguyen, T.H. 2023. Cycas tropophylla. The IUCN Red List of Threatened Species 2023: e.T42087A69827956. Accessed on 05 May 2026.
Répartition mondiale
Aucune observation géoréférencée avec précision suffisante (<10 km) dans GBIF pour cette espèce.
Consulter sur les bases externes
Observations & statuts
Cartographie