Cycas tansachana
K.D.Hill & S.L.Yang
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Description
species of plant in the family of Cycadaceae
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cycas tansachana.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères A3cd+4cd; B1ab(i,ii,iii,v)↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Plants are locally abundant and it was estimated that there were 2,500 to 10,000 mature individuals but very restricted in their distribution. Subsequently, a week long survey in 2007 revealed less than 300 mature plants, mostly scattered over large areas. The only surviving viable subpopulation was found within a Buddist temple area. More recently, a second large subpopulation has been found that consists of 5,000+ mature plants with excellent regeneration. Unlike the type locality the new locality is protected by Municipality Decree but it is still under threat from cement manufacturing.
Menaces identifiées(2 menaces classées CMP-IUCN)
3_2Mining & quarryingOngoing5_2_1Intentional use (species is the target)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
This species is apparently quite restricted in occurrence and under severe pressure from plant collectors and limestone mining operations. The whole mountain has been earmarked for cement extraction. The contract is for 100 years or as long as there is any mountain left, which ever comes first. Over 60% of the mountain has effectively been removed within the last 10 years.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. Unlike the type locality the new locality is protected by Municipality Decree but it is still under threat from cement manufacturing. Insurance of the formal protection of this species is needed. 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
CycadTree - large
Références bibliographiques (7)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).
- IUCN. 2022. The IUCN Red List of Threatened Species. Version 2022-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 21 July 2022).
- Jones, D.L. 2002. <i>Cycads of the World</i>. Smithsonian Institution Press, Washington, DC.
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
- Hill, K.D. and Yang, S.-L. 1999. The genus <i>Cycas</i> (Cycadaceae) in Thailand. <i>Brittonia</i> 51(1): 48-73.
- Tang, W. 1999. Focus on <i>Cycas tansachana</i>. <i>Encephalartos</i> 60: 4-7.
- 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
Lindstrom, A.
contributor
Hill, K.D.
evaluator
Bösenberg, J.D.
⚠ 1 erratum publié après l'évaluation.
Lindstrom, A. 2022. Cycas tansachana (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T42042A243420725. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
Consulter sur les bases externes
Observations & statuts
Cartographie