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Parashorea chinensis 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Malvales Dipterocarpaceae

Scientific Name: Parashorea chinensis Wang Hsie
Synonym(s):
Shorea chinensis (Wang Hsie) H.Zhu
Shorea wangtianshuea Y.K.Yang & J.K.Wu

Assessment Information [top]

Red List Category & Criteria: Endangered A2cd ver 3.1
Year Published: 2018
Date Assessed: 2017-07-28
Assessor(s): Ly, V., Nanthavong, K., Hoang, V.S., Vu, V.D., Barstow, M., Luu, H.T., Khou, E. & Newman, M.
Reviewer(s): Nguyen, H.N.
Facilitator/Compiler(s): Hilton-Taylor, C., Rivers, M.C.
Justification:
Parashorea chinensis is a large tree species. It is native to China, Viet Nam and Lao PDR. This species is globally assessed as Endangered it has undergone a 50-70% population reduction in the last three generations (+300 years) due to over-exploitation and loss of habitat due to expanding agriculture. These actions still threaten the species so decline is likely to continue into the future. In Viet Nam exploitation has reduced the population of seed bearing individuals or 'mother' trees hence there is a growing concern about the future regeneration of the species. The species is found within protected areas in China and Viet Nam. There is limited information for this species within Lao PDR; population and habitat information for the species within this country should be gathered. There is a need to develop in situ and ex situ conservation efforts for this species.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is native to eastern Asia. The species is found in northern Lao PDR and Viet Nam at the Chinese border and in the provinces of Yunnan and Guangxi within China. This is the northern range of the dipterocarps (Li et al. 2005). The species if found from 300 m asl up to 1,100 m asl and it has an estimated extent of occurrence that exceeds the criteria for a threatened category under Criterion B.
Countries occurrence:
Native:
China (Guangxi, Yunnan); Lao People's Democratic Republic; Viet Nam
Additional data:
Lower elevation limit (metres):300
Upper elevation limit (metres):1100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species has a fairly restricted range. Within this range the species is common in Viet Nam, however, the species faces depletion and over exploitation. As a consequence, the Vietnamese subpopulation has become scattered with few mother trees retained in the forest. Therefore, there is growing concerns about the species regeneration ability in Viet Nam which is generally considered to be poor, with many seedlings not reaching maturity (Nguyen 2005). In Lao PDR individuals are scattered within forest. In China the species is also locally common as the subpopulations are remnants of much larger coverage. Sixty percent of its population can be found within the Mengala County forest reserve (Li et al. 2005). Overall population is declining, it has undergone a 50-70% population reduction in the last three generations (150 years) due to loss of habitat and exploitation. It is likely decline will continue into the future due to continued exploitation and poor regeneration, the rate of this decline cannot be predicted.
Current Population Trend:Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This large tree species can grow to over 40 m in height (Xiwen et al. 2007). It makes up the upper canopy of forests. This species is found on valleys, mountain slopes and hills in dense forests (Xiwen et al. 2007). It is able to grow on rocky substrate. Within Lao PDR the species flowers from April to June and fruits from July to September (Biotik 2006). Seeds are dispersed by gravity and require high light intensity for germination (Li et al. 2005). There is genetic differences between subpopulations but little diversity is held within subpopulations (Li et al. 2005). The species' habitat is declining.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):75-100

Use and Trade [top]

Use and Trade: This species is used for its timber. The wood is hard and durable and used for house construction, flooring, plywood, furniture and cabinet building (Biotik 2006).

Threats [top]

Major Threat(s): This species is threatened by the continuation of selective logging. This process caused historical decline to the population and its loss from much of its range. The species is further threatened by habitat loss due to agricultural expansion. There is also the risk of reduced genetic diversity of the population as a whole, as subpopulations are scattered and there is limited genetic movement between the populations due to a small seed dispersal range. Although there is diversity between populations there is limited diversity held within sub populations (Li et al. 2005). This can reduce the regeneration capacity of the species.

Conservation Actions [top]

Conservation Actions: This species is reported from five ex situ collections (BGCI 2017). There is also an ex situ plantation of this species at Xishuangbanna Tropical Botanical garden China, generated from 50 seedlings (Li et al. 2005). In Viet Nam Parashorea chinensis is protected in five national parks; individuals within Cuc Phuong National Park have the potential to be used as a germ plasm resource (Nguyen 2005). In China the species is considered threatened (Ministry of Environmental Protection and the Chinese Academy of Sciences 2014) and is found in protected areas. It is essential that ex situ conservation of the species continues and develops to fully represent the species native range and genetic diversity. This includes both seed collections and ex situ conservation stands (Nguyen 2005). In situ conservation efforts should also be developed including population restoration. The remaining native habitat of the species should be conserved and harvest of the species should be monitored and limited; this may involve the identification of other timber species for use by subsistence communities. Further information on the species within Lao PDR should be gathered, including population size and rates of both population and habitat decline. This will better enable conservation action with these areas.

Citation: Ly, V., Nanthavong, K., Hoang, V.S., Vu, V.D., Barstow, M., Luu, H.T., Khou, E. & Newman, M. 2018. Parashorea chinensis. The IUCN Red List of Threatened Species 2018: e.T32476A2820115. . Downloaded on 24 September 2018.
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