Alnus henryi

C.K.Schneid.

Plante

CRLR Monde (IUCN)

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

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Calcul du tissu écologique de Alnus henryi.

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Liste rouge IUCN

CR · En danger critiquecritères D?Inconnue

Évaluation complète

Évaluation: 2014 · v3.1
Altitude: – m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

Some references suggest this species is common within its range. Kirkham and Flanagan during their 1992 expedition to Taiwan, describe it as an abundant pioneer and a 'common and successful tree'. However, it is more likely that the commonly occurring Alnus species on the island is A. formosana. Recent surveys of the reported distribution area have not found this species and it is therefore flagged as Possibly Extinct. If this species is still present in Taiwan remaining population size is estimated to be fewer than 50 mature individuals (R. Hsu, Taiwan Forestry Research Institute pers. comm. 2014).

Menaces identifiées(2 menaces classées CMP-IUCN)

10_3
Avalanches/landslides
Ongoing
11_4
Storms & flooding
Ongoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

Flooding, typhoons and landslides are a problem in the area and may pose a threat to this species.

Habitats préférentiels (classification IUCN)

1_4Forest - Temperate

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

This species is reported as held in ex situ collections, although very rare in cultivation, but it is thought that reported collections are in fact Alnus formosana rather than A. henryi. Further field research is required to determine the population status of this species. If wild individuals are identified, in situ conservation should be put in place and, if possible, propagation material should be collected to establish a secure ex situ collection and population recovery plan.

Actions de conservation (3)Conservation Actions Classification Scheme — IUCNExpert

1_2Resource & habitat protection
3_2Species recovery
3_4_2Genome resource bank

Priorités de recherche (1)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends

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

Royaumes biogéographiques

Indomalayan

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Shrub - largeTree - large

Références bibliographiques (7)Sources scientifiques de l'évaluation IUCNExpert

IUCN. 2014. The IUCN Red List of Threatened Species. Version 2014.3. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 13 November 2014).
Missouri Botanical Garden. 2013. Tropicos. Missouri Available at: <a href="www.tropicos.org">www.tropicos.org</a>.
Govaerts, R. 2013. World Checklist of Betulaceae. Facilitated by the Royal Botanic Gardens, Kew Available at: <a href="http://www.kew.org/wcsp/">http://www.kew.org/wcsp/</a>.
The Plant List. 2010. The Plant List. Available at: <a href=" http://www.theplantlist.org/"> http://www.theplantlist.org/</a>. (Accessed: 2013).
Grimshaw, J. and Bayton, R. 2009. <i>New Trees: Recent Introductions to Cultivation</i>. Kew Publishing, Kew.
eFloras. 2008. Flora of China. Available at: <a href="www.efloras.org">www.efloras.org</a>.
Huang, T.C. 1996. <i>Flora of Taiwan</i>. Editorial Committee of the Flora of Taiwan, Taipai, Taiwan.

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

assessor

Shaw, K., Roy , S. & Wilson, B.

contributor

Hsu, R.

evaluator

Oldfield, S. & Rivers, M.C.

Shaw, K., Roy , S. & Wilson, B. 2014. Alnus henryi. The IUCN Red List of Threatened Species 2014: e.T194641A2355096. Accessed on 05 May 2026.