Dioon planifolium

Salas-Mor., Chemnick & T.J.Greg.

Plante

VULR Monde (IUCN)

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

Graphe en cours d’indexation

Calcul du tissu écologique de Dioon planifolium.

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

Liste rouge IUCN

VU · Vulnérablecritères C1; D2↘Décroissante

Évaluation complète

Évaluation: 2022 · v3.1
Altitude: 1400 – 1650 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

The subpopulations examined contained all life stages. Active coning and recruitment have been in evidence over many years of observation. Strobili shed pollen and are receptive to pollination in the months of November and December. Seed is released April through June, in advance of the rainy season. The pollinator has been identified as the Dioon Weevil, Parallocorynus bicolor (Voss). We estimate that Dioon planifolium has a total population of ca. 5,000 plants (mature individuals) (Salas-Morales et al. 2016).

Menaces identifiées(2 menaces classées CMP-IUCN)

2_1_2
Small-holder farming
UnknownUnknownOngoing
2_3_2
Small-holder grazing, ranching or farming
UnknownUnknownOngoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

The habitat of the northern subpopulation has suffered from intense grazing by goats and cattle as well as conversion of the habitat, long ago, for agriculture. The potential for habitat destruction or poaching to threaten the stability of the species is great because the area of distribution is small and no Dioon planifolium occur in any reserves or protected areas.

Habitats préférentiels (classification IUCN)

1_5Forest - Subtropical/Tropical Dry★

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

Dioon planifolium does not occur in any reserves or protected areas. The long-term monitoring of subpopulations will support the conservation of this species. While this species is not specifically listed on CITES, all Zamiaceae are included in CITES Appendix II.

Stress écologiques (4)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_1Ecosystem conversion
1_2Ecosystem degradation
1_2Ecosystem degradation

Priorités de recherche (2)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
3_1Population trends

Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert

Royaumes biogéographiques

Neotropical

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Cycad

Références bibliographiques (2)Sources scientifiques de l'évaluation IUCNExpert

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).
Salas-Morales, S.H., Chemnick, J. and Gregory, T.J. 2016. A new cycad species in the genus <i>Dioon</i> (Zamiaceae) from the Mixteca region of Oaxaca, Mexico. <i>Cactus and Succulent Journal</i> 88(1): 35-42.

Évaluateurs & contributeurs (2)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Gregory, T. & Chemnick, J.

evaluator

Bösenberg, J.D.

Gregory, T. & Chemnick, J. 2022. Dioon planifolium. The IUCN Red List of Threatened Species 2022: e.T103632265A103632300. Accessed on 05 May 2026.