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Dipteronia sinensis 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Sapindales Sapindaceae

Scientific Name: Dipteronia sinensis Oliv.

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2017
Date Assessed: 2017-01-18
Assessor(s): Crowley, D., Barstow, M. & Rivers, M.C.
Reviewer(s): Wen, X.
Justification:
Dipteronia sinensis is a tree endemic to China. The species is assessed here as Data Deficient due to a lack of population information which means we are unable to accurately assign a threat category to the species as the distribution is currently considered too large. Population and more accurate location information should be collected for this species to understand the full impact of habitat loss on the population.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Dipteronia sinensis is endemic to central and south western China (Su et al. 2012). It is found at altitudes between 1,000 and 2,400 m asl (Zhengyi 1994-2013). The species' wide range in China means it probably has an extent of occurrence (EOO) that exceeds 700,000 km2. Population point data is currently not available for the species so the area of occupancy (AOO) cannot be estimated but is anticipated to be small.
Countries occurrence:
Native:
China (Gansu, Guizhou, Henan, Hubei, Hunan, Shaanxi, Shanxi, Sichuan)
Additional data:
Lower elevation limit (metres):1000
Upper elevation limit (metres):2400
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Population information on this species is limited. The population is sparse and occurs in limited, individual numbers (Su et al. 2012) however it is known to retain high genetic diversity (Bai et al. 1975-80).
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Dipteronia sinensis is a small tree or multi-stemmed shrub up to 15 m in height (Zhengyi 1994-2013). The species can grow in a variety of habitats including rocky ground and along ravines, along waters edge, peat bogs and dry pine woods (Clennett 2013). It is most commonly found in mixed forests and the margins of broad leaf forests (Zhengyi 1994-2013). The species can form pure stands on mountains and in exposed situations (Clennett 2013).
Systems:Terrestrial

Use and Trade [top]

Use and Trade: The mature trees are cut for timber (Clennett 2013). This use is suspected to be in decline as not many large trees currently persist hence the species is mostly chopped for fire wood (Bai et al. 1975-80). The species is used in horticulture as an ornamental (Zhengyi 1994-2013).

Threats [top]

Major Threat(s): Dipteronia sinensis is predominantly threatened by forest clearance and being cut for wood (Su et al. 2011). The species has weak natural regeneration capacity due to felling for timber which removed mature trees from the population (IUCN 1997).

Conservation Actions [top]

Conservation Actions: The species is found in 85 ex situ collections (BGCI 2017). The species is considered near threatened in China (Sung and Yan 2004) and previous global assessments (IUCN 1997, Gibbs and Chen 2009). It was identified by Bai et al. (1975-80) that the species habitat requires protection to be able to increase the number of individuals in wild populations. The species requires better monitoring, a full population census and an investigation into the impact of deforestation to ensure effective conservation action.

Citation: Crowley, D., Barstow, M. & Rivers, M.C. 2017. Dipteronia sinensis. The IUCN Red List of Threatened Species 2017: e.T32401A2817860. . Downloaded on 24 April 2018.
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