Dioon rzedowskii
De Luca, A.Moretti, Sabato & Vázq.Torres
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Pays · région · aire protégée · écorégion · biome
Graphe en cours d’indexation
Calcul du tissu écologique de Dioon rzedowskii.
Le graphe apparaîtra automatiquement dès que le calcul est terminé (rafraîchissement toutes les 5s).
Liste rouge IUCN
EN · En dangercritères A2ac+4ac; B1ab(i,iii,iv,v)↘Décroissante- Évaluation
- 2022 · v3.1
- Altitude
- 650 – 850 m
- Profondeur
- – m
État de la populationTexte officiel évaluation IUCNExpert
Plants are known from two subpopulations. Though many hundreds, if not thousands, of plants apparently comprise this taxon, the population occurs in an area of very restricted distribution along the river. Records from 2005 indicate that 3,000 mature individuals were recorded. Habitat destruction is causing a decline in the total population. Significant declines in the numbers of individuals at the type locality have been observed.
Menaces identifiées(1 menace classée CMP-IUCN)
2_1_2Small-holder farmingOngoing
Description complète des menacesTexte détaillé évaluation IUCNExpert
Habitat destruction (for corn fields) in the area proceeds at an alarming rate and even the cliff habitat of Dioon rzedowskii does not appear to safe. Significant declines in the numbers of individuals at the type locality below San Bartolome Ayautla have been observed.
Habitats préférentiels (classification IUCN)
1_9Forest - Subtropical/Tropical Moist Montane6Rocky areas (eg. inland cliffs, mountain peaks)
Mesures de conservation recommandéesStratégies de conservation IUCNExpert
This species is listed in Appendix II of CITES. An education and awareness programme as well as the long-term monitoring of the population will support the conservation of this species
Actions de conservation (1)Conservation Actions Classification Scheme — IUCNExpert
4_3Awareness & communications
Stress écologiques (2)Stresses Classification — IUCNExpert
1_1Ecosystem conversion1_2Ecosystem degradation
Usage & commerce (1)Use & Trade — IUCNExpert
13Pets/display animals, horticultureinternationalnationalsubsistance
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
Neotropical
Systèmes (terrestre/eau douce/marin)
Terrestrial
Formes de croissance
CycadTree - large
Références bibliographiques (8)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).
- 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.
- Whitelock, L.M. 2002. <i>The Cycads</i>. Timber Press, Portland, Oregon.
- Jones, D.L. 2002. <i>Cycads of the World (2nd edition)</i>. Smithsonian Institute Press, Washington, DC.
- 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>.
- Jones, D.L. 1993. <i>Cycads of the World</i>. Reed, New Holland, Frenchs Forest, N.S.W., Australia.
- De Luca, P., Moretti, A., Sabato, S. and Vazquez Torres, M. 1980. <i>Dioon rzedowskii</i> (Zamiaceae), a new species from Mexico. <i>Brittonia</i> 32(2): 225-229.
Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert
assessor
Vovides, A.P., Chemnick, J. & Gregory, T.
contributor
Morales, S. & Donaldson, J.S.
evaluator
Bösenberg, J.D.
⚠ 1 erratum publié après l'évaluation.
Vovides, A.P., Chemnick, J. & Gregory, T. 2022. Dioon rzedowskii (errata version published in 2023). The IUCN Red List of Threatened Species 2022: e.T42148A243387089. 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