Cycas nathorstii
J.Schust.
Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cycas nathorstii.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
VU · Vulnérablecritères A2cd+4cd↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- 30 – 300 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
It is locally frequent, although not in great numbers.
Menaces identifiées(4 menaces classées CMP-IUCN)
1_1Housing & urban areasOngoing2_1_4Scale Unknown/UnrecordedOngoing2_3_3Agro-industry grazing, ranching or farmingOngoing5_2_1Intentional use (species is the target)Ongoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Like all cycads in Tamil Nadu of India, this species has suffered greatly from stem cutting for local medicine. Several subpopulations have been depleted to only a very few scattered individuals. As the lowland is very attractive agricultural land, subpopulations have also been destroyed to make way for human populations. It is regarded as Endangered in India.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. The species is still locally frequent in Sri Lanka although it is never found in great numbers. It is known to be present in reserves, but political instability made assessment difficult and future status uncertain. However, the recent end of conflict in this region now provides new opportunities for surveys and conservation work. Plants are most probably present in the Wilpattu, Ritigalla, Kantalai and Gal Oya reserves in Sri Lanka. 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 (7)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality
Usage & commerce (1)Use & Trade — IUCNExpert
3Medicine - human & veterinarysubsistance
Priorités de recherche (6)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_4Harvest, use & livelihoods1_5Threats1_6Actions3_1Population 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 (5)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).
- Antony, R., Shareef, S.M. and Mohanan, N. 2010. <i>Cycas nathorstii</i> J. Schust. (Cycadaceae), a new record for Kerala state, India. <i>Encephalartos</i> 102: 17-18.
- Lindström, A.J. and Hill, K.D. 2007. The genus <i>Cycas</i> (Cycadaceae) in India. <i>Telopea</i> 11(4): 463–488.
- Lindström, A.J. and Hill, K.D. 2002. Notes on the species of <i>Cycas</i> (Cycadaceae) from Sri Lanka and the islands of the Andaman Sea. <i>Novon</i> 12: 237-240.
Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D.
evaluator
Donaldson, J.S.
⚠ 1 erratum publié après l'évaluation.
Bösenberg, J.D. 2022. Cycas nathorstii (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T42094A243418869. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s