Cycas saxatilis

K.D.Hill & A.Lindstr.

Plante

VULR Monde (IUCN)

Filtrer le graphe par contexte spatialPays · région · aire protégée · écorégion · biome

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Calcul du tissu écologique de Cycas saxatilis.

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Liste rouge IUCN

VU · Vulnérablecritères D2→Stable

Évaluation complète

Évaluation: 2023 · v3.1
Altitude: – m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

Although it is known from a single locality, plants are abundant in large, undisturbed subpopulations that occur in the most inaccessible sites.

Menaces identifiées(1 menace classée CMP-IUCN)

8_1_2
Named species
Future

Description complète des menacesTexte détaillé évaluation IUCNExpert

There are no immediate threats. The whole distribution is within a protected area. However, the Aulacaspis cycad scale has been introduced to various islands in the Pacific and Cycas species are particularly vulnerable. The scale insect has caused rapid and dramatic population declines in wild populations, such as C. micronesica, as well as a wide range of Cycas species in cultivation. The habitat in the Philippines has been identified as a moderate risk habitat for invasion by the Aulacaspis scale insect (Wei et al. 2018). Occurrence at a single locality means that Cycas saxatilis would be vulnerable to extinction if the scale reached Palawan. Poaching is minor and habitat destruction is not a problem due to the habitat of sheer limestone cliffs.

Habitats préférentiels (classification IUCN)

6Rocky areas (eg. inland cliffs, mountain peaks)

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

This species is listed in Appendix II of the CITES Appendices. Most of the range of Cycas saxatilis is included in the Puerto Princesa Subterranean River National Park. 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 (1)Stresses Classification — IUCNExpert

2_1Species mortality

Priorités de recherche (3)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
1_5Threats
3_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).
Wei, J., Zhao, Q., Zhao, W. and Zhang, H. 2018. Predicting the potential distributions of the invasive cycad scale Aulacaspis yasumatsui (Hemiptera: Diaspididae) under different climate change scenarios and the implications for management. PeerJ 6: e4832.
Lindström, A.J., Hill, K.D. and Stanberg, L.C. 2008. The genus Cycas (Cycadaceae) in The Philippines. Telopea 12(1): 119-145.
Bonta, M. and Osborne, R. 2007. Cycads in the vernacular: A compendium of local names. Proceedings of the 7th International Conference on Cycad Biology, Xalapa, Mexico, January 2005. Memoirs of the New York Botanical Garden 97: 143-175.
Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: <a href="http://plantnet.rbgsyd.gov.au/PlantNet/cycad/">http://plantnet.rbgsyd.gov.au/PlantNet/cycad/</a>.

Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Lindstrom, A.

contributor

Bösenberg, J.D.

evaluator

Bösenberg, J.D.

Lindstrom, A. 2023. Cycas saxatilis. The IUCN Red List of Threatened Species 2023: e.T178864A69156279. Accessed on 05 May 2026.