Ontologia

Cycas javana

(Miq.) de Laub. ex D.Yue Wang

CRLR Monde (IUCN)
Pays · région · aire protégée · écorégion · biome

Graphe en cours d’indexation

Calcul du tissu écologique de Cycas javana.

Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).

Liste rouge IUCN

CR · En danger critiquecritères A2ace+4aceDécroissante
Évaluation complète
Évaluation
2023 · v3.1
Altitude
2501000 m
Profondeur
m
État de la populationExpert
This species used to be found in lowland areas and moderate slopes and elevations. Studies of deforestation concluded that most lowland areas had been severely impacted by 2005 (Prasetyo et al. 2009) but that ongoing deforestation was most likely to impact higher elevation sites and steeper slopes after 2005. This seems to have been the case with Cycas javana. Surveys in 2014 found only single plants in two localities, where previously viable populations existed. Several historically recorded subpopulations are extinct. No viable subpopulations were found and no plants have been found being sold locally in plant markets indicating that they are not accessible to local collectors. It is estimated that fewer than 500 plants remain, which is a generous estimate. It is estimated that the loss of habitat for this species now exceeds 80%.

Menaces identifiées(4 menaces classées CMP-IUCN)

  • 5_3_4
    Unintentional effects: (large scale) [harvest]
    Rapid DeclinesMajority (50-90%)Ongoing
  • 2_1_2
    Small-holder farming
    Ongoing
  • 2_1_3
    Agro-industry farming
    Ongoing
  • 8_2_2
    Named species
    Ongoing
Description complète des menacesExpert
Much of the primary forest habitat has been cleared or degraded in recent decades, and there is ongoing and extensive destruction of high altitude habitat. The Cycad Aulacaspis Scale is highly prevalent on Java and is known to cause significant die off of Cycas plants wherever it has invaded.

Habitats préférentiels (classification IUCN)

  • 1_6Forest - Subtropical/Tropical Moist Lowland
  • 1_9Forest - Subtropical/Tropical Moist Montane
Mesures de conservation recommandéesExpert
Conservation action is required to address the primary threats of habitat destruction and the impact of invasion by the Aulacaspis scale. This species is listed in Appendix II of the CITES Appendices but international trade is not a major threat. An education and awareness programme as well as the long-term monitoring of subpopulations will support the conservation of this species.
Actions de conservation (3)Expert
  • 1_1Site/area protection
  • 2_2Invasive/problematic species control
  • 4_3Awareness & communications
Stress écologiques (8)Expert
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_1Ecosystem conversion
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 1_2Ecosystem degradation
  • 2_1Species mortality
  • 2_3_7Reduced reproductive success
Priorités de recherche (3)Expert
  • 1_2Population size, distribution & trends
  • 1_3Life history & ecology
  • 1_6Actions
Niche IUCN globaleExpert

Royaumes biogéographiques

Indomalayan

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadTree - large
Références bibliographiques (7)Expert
  1. 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).
  2. Lindstrom, A.J., Hill, K.D. and Stanberg, L.C. 2009. The genus <i>Cycas</i> (Cycadaceae) in Indonesia. <i>Telopea</i> 12(3): 385-418.
  3. Prasetyo et al. 2009. Spatial model approach on deforestation of Java, indonesia. <i>Journal of Integrated Field Science</i> 6: 37-44.
  4. 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.
  5. Jones, D.L. 2002. <i>Cycads of the World (2nd edition)</i>. Smithsonian Institute Press, Washington, DC.
  6. Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
  7. 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)Expert
assessor
Lindstrom, A.
contributor
Hill, K.D.
evaluator
Bösenberg, J.D.

Lindstrom, A. 2023. Cycas javana. The IUCN Red List of Threatened Species 2023: e.T42093A68903080. Accessed on 05 May 2026.

Répartition mondiale (heatmap GBIF)Construction en cours

0 obs · 0 cellules
Construction par partitions temporelles GBIF0%

Source : GBIF — observations agrégées par hexagones 0.2° × 0.2° (~22km). Filtre qualité : précision coordonnée < 10 km. Coloration quantile (q50/70/90/99). Fond carte : OpenFreeMap · © OpenStreetMap.

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

Bibliographie

Note nomenclaturale & synonymesExpert

Note nomenclaturale

TAXREF v18 — INPN/MNHN

Synonymes (2)— redirigent vers cette page

  • Cycas circinalis var. javanaMiq.
  • Cycas circinalis var. javanaL.

Sources : Catalogue of Life Cross-References (synonymes) · TAXREF v18 INPN/MNHN (commentaires FR).