Cycas zeylanica
(J.Schust.) A.Lindstr. & K.D.Hill
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Cycas zeylanica.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
CR · En danger critiquecritères A2ac↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- 5 – 50 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Sri Lanka. Subpopulations have been totally destroyed and a survey in 2010 failed to find any plants. It is believed that the few remaining plants on Sri Lanka were destroyed by the 2004 tsunami that hit the coast of Sri Lanka and seriously damaged the only known narrow strip of land where the last scattered individuals existed.
India. The species was thought to be more widespread on the Andaman and Nicobar islands. However, severe damage has been done by repeated strong cyclones and development of seaside resorts on the islands has also had an impact on some populations. Field visits have only located about 150 mature plants.
India. The species was thought to be more widespread on the Andaman and Nicobar islands. However, severe damage has been done by repeated strong cyclones and development of seaside resorts on the islands has also had an impact on some populations. Field visits have only located about 150 mature plants.
Menaces identifiées(4 menaces classées CMP-IUCN)
10_2Earthquakes/tsunamisPast, Unlikely to Return11_4Storms & floodingOngoing1_3Tourism & recreation areasOngoing6_1Recreational activitiesOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Sri Lanka: All of the subpopulations have been totally decimated and the species is now regionally extinct.
India: This species was more widespread and common, however, severe damage has been done by cyclones. Some of the habitat has been destroyed to make way for tourist accommodation.
India: This species was more widespread and common, however, severe damage has been done by cyclones. Some of the habitat has been destroyed to make way for tourist accommodation.
Habitats préférentiels (classification IUCN)
13_3Marine Coastal/Supratidal - Coastal Sand Dunes1_6Forest - Subtropical/Tropical Moist Lowland
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. In the Andaman and Nicobar islands, subpopulations occur within protected areas as well as in off-limit, military areas. Identification of further suitable sites for 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 (7)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation2_1Species mortality2_2Species disturbance
Priorités de recherche (3)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_3Life history & ecology1_6Actions
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).
- Lindström, A.J. and Hill, K.D. 2007. The genus <i>Cycas</i> (Cycadaceae) in India. <i>Telopea</i> 11(4): 463–488.
- Jones, D.L. 2002. <i>Cycads of the World</i>. Smithsonian Institution Press, Washington, DC.
- 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 (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Lindstrom, A.
contributor
Bösenberg, J.D.
evaluator
Bösenberg, J.D.
⚠ 1 erratum publié après l'évaluation.
Lindstrom, A. 2022. Cycas zeylanica (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T42098A243421803. 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
Note nomenclaturale & synonymesDétails taxonomiques + synonymes CoLExpert
Note nomenclaturale
TAXREF v18 — INPN/MNHNSynonymes (3)— redirigent vers cette page
- Cycas rumphii subsp. zeylanicaJ.Schust.
- Cycas rumphii subsp. zeylanicaMiq.
- Cycas sainathiiR.C.Srivast.
Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).