Betula tianschanica

Rupr.

Plante

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

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Calcul du tissu écologique de Betula tianschanica.

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Liste rouge IUCN

DD · Données insuffisantes↘Décroissante

Évaluation complète

Évaluation: 2018 · v3.1
Altitude: 1300 – 2500 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

This species is rare, occurring as small isolated populations in the dry mountains. Populations are fragmented. Populations in Central Asia (Uzbekistan, Kazakhstan and Kyrgyzstan) have declined at a rapid rate (exceeding 50% over the past 3 generations). Population information outside of these areas is not available.

Menaces identifiées(5 menaces classées CMP-IUCN)

10_3
Avalanches/landslides
UnknownUnknownOngoing
2_3_1
Nomadic grazing
UnknownUnknownOngoing
5_3_1
Intentional use: (subsistence/small scale) [harvest]
UnknownUnknownOngoing
6_1
Recreational activities
UnknownUnknownOngoing
7_1_3
Trend Unknown/Unrecorded
UnknownUnknownOngoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

Both a restricted distribution and fragmented populations makes this species susceptible to threats. The major threats to this species include grazing from livestock and firewood collection by locals. Avalanches at high elevations and tourism are also threats to this species. Fire has also been reported as a threat to its synonym B. jarmolenkoana.

Habitats préférentiels (classification IUCN)

1_4Forest - Temperate
4_4Grassland - Temperate

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

Part of the range of this species is within a protected area; the Xinjiang Tianshan mountain system in China is a natural World Heritage Site and is therefore protected and has ongoing conservation management. In the Chinese Red List this species is assessed as Least Concern. However, no other reported conservation actions are in place in other parts of its range.
This species is found in 32 ex situ collections (BGCI 2017). This species would benefit from a combination of in situ monitoring as well as increased protection. This species was assessed as Endangered on the IUCN Red List (2007) and in the Red List of Trees of Central Asia (2009), however that assessment did not take populations in Mongolia into account and presence in Tajikistan was uncertain.

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

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

Stress écologiques (11)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_2Ecosystem degradation
2_1Species mortality
2_1Species mortality
2_1Species mortality
2_1Species mortality
2_2Species disturbance
2_2Species disturbance
2_2Species disturbance
2_2Species disturbance
2_2Species disturbance

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

Palearctic

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

Tree - small

Références bibliographiques (13)Sources scientifiques de l'évaluation IUCNExpert

IUCN. 2018. The IUCN Red List of Threatened Species. Version 2018-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 28 June 2018).
BGCI. 2017. PlantSearch. Botanic Gardens Conservation International, London. Available at: <a href="https://www.bgci.org/plant_search.php">https://www.bgci.org/plant_search.php</a>.
Carpenter, C. 2014. Tian Shan montane conifer forests. Available at: <a href="http://worldwildlife.org/ecoregions/pa0521">http://worldwildlife.org/ecoregions/pa0521</a>. (Accessed: 21,Jan).
USDA, ARS, National Genetic Resources Program. 2013. Germplasm Resources Information Network, GRIN (Online database). Beltsville, Maryland Available at: <a href="http://www.ars-grin.gov/cgi-bin/npgs/html/family.pl?144">http://www.ars-grin.gov/cgi-bin/npgs/html/family.pl?144</a>. (Accessed: December 13).
IUCN. 2013. Tianshan mountains in China become World Heritage Site. (Accessed: 15,Jan).
Missouri Botanical Garden. 2013. Tropicos. Saint Louis, Missouri. Available at: <a href="www.tropicos.org">www.tropicos.org</a>.
Ashburner, K. and McAllister, H.A. 2013. The Genus Betula: A Taxonomic Revision of Birches. Kew Publishing, Richmond, Surrey.
UNESCO. 2013. Xinjiang Tianshan. (Accessed: 15,Jan).
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).
Eastwood, A., Lazkov, G, and Newton, A. 2009. The Red List of Trees of Central Asia. FFI, BGCI, GTC,IUCN/SSC , Cambridge.
Grimshaw, J. and Bayton, R. 2009. New Trees: Recent Introductions to Cultivation. Kew Publishing, Kew.
eFloras. 2008. Flora of China. Available at: <a href="www.efloras.org">www.efloras.org</a>.

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

assessor

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

evaluator

Tarieiev, A.

Roy, S., Shaw, K., Wilson, B. & Beech, E. 2018. Betula tianschanica. The IUCN Red List of Threatened Species 2018: e.T63463A3125436. Accessed on 05 May 2026.