Cycas armstrongii
Miq.
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Pays · région · aire protégée · écorégion · biome
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Calcul du tissu écologique de Cycas armstrongii.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
VU · Vulnérablecritères A4cde↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- – m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
This species occurs in large subpopulations comprising more than 100,000 plants in total.
Cycas armstrongii is facultatively deciduous late in the dry season of the monsoonal climatic cycle experienced in its natural habitat, and fertile plants are frequently seen with the reproductive structure only, and no leaves. Regular fires can also kill the above-ground parts of shorter plants, promoting below-ground branching from an often massive swollen subterranean caudex.
Cycas armstrongii is facultatively deciduous late in the dry season of the monsoonal climatic cycle experienced in its natural habitat, and fertile plants are frequently seen with the reproductive structure only, and no leaves. Regular fires can also kill the above-ground parts of shorter plants, promoting below-ground branching from an often massive swollen subterranean caudex.
Menaces identifiées(4 menaces classées CMP-IUCN)
1_1Housing & urban areasOngoing5_2_1Intentional use (species is the target)Ongoing7_1_1Increase in fire frequency/intensityOngoing8_1_1Unspecified speciesOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Land clearing and inappropriate fire regimes are the main threats. Increased fire intensity, particularly arising from increased fuel load due to invasion of exotic grasses, is expected to result in higher mortality. It is estimated that the rate of clearing and loss due to fires is resulting in an ongoing decline of at least 30% over three generations (120 years). As with some species within this genus, it is also susceptible to over collecting for ornamental purposes.
Habitats préférentiels (classification IUCN)
1_5Forest - Subtropical/Tropical Dry2_1Savanna - Dry
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of the CITES Appendices. Cycas armstrongii is found in multiple land tenures including private, government and leasehold. It is found in the following parks and reserves: Berry Springs Nature Park, Black Jungle Conservation Area, Blackmore River Conservation Reserve, Casuarina Coastal Reserve, Djukbinj National Park, Garig Gunak Barlu National Park, Holmes Jungle Nature Park, Howard Springs Hunting Reserve, Howard Springs Nature Park, Kakadu National Park, Litchfield National Park and Manton Dam Recreation Area. Long-term monitoring of subpopulations will support the conservation of this species.
Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert
2_1Site/area management
Stress écologiques (8)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation1_2Ecosystem degradation1_2Ecosystem degradation1_3Indirect ecosystem effects2_1Species mortality2_1Species mortality2_3_7Reduced reproductive success
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnational
Priorités de recherche (2)Research Needed Classification — IUCNExpert
1_2Population size, distribution & trends1_6Actions
Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert
Royaumes biogéographiques
Australasian
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadTree - large
Références bibliographiques (9)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).
- Commonwealth of Australia. 2013. Flora of Australia Online. Available at: <a href="http://www.anbg.gov.au/abrs/online-resources/flora/main-query-styles.html">http://www.anbg.gov.au/abrs/online-resources/flora/main-query-styles.html</a>.
- Liddle, D.T. 2009. <i>Management Program for Cycads in the Northern Territory of Australia 2009-2014.</i> Department of Natural Resources, Environment, The Arts and Sport.
- Anonymous. 2007. <i>A Management Program for Cycads in the Northern Territory of Australia (Draft)</i>. N. Terr. Government - Parks and Wildlife Service.
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
- Hill, K. and Osborne, R. 2001. <i>Cycads of Australia</i>.
- 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>.
- Watkinson, A.R. and Powell, J.C. 1997. The life history and population structure of <i>Cycas armstrongii</i> in monsoonal northern Australia. <i>Oecologia</i> 111: 341-349.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Bösenberg, J.D.
contributor
Liddle, D.
evaluator
Donaldson, J.S.
⚠ 1 erratum publié après l'évaluation.
Bösenberg, J.D. 2022. Cycas armstrongii (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T41987A243413981. Accessed on 05 May 2026.
Distribution mondiale
Calcul de la distribution GBIF· ~10–60 s
Phénologie
Calcul du calendrier d'apparition· ~5–30 s
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Observations & statuts
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