Calocedrus rupestris 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Pinopsida Pinales Cupressaceae

Scientific Name: Calocedrus rupestris Aver., Hiep & L.K.Phan
Taxonomic Source(s): Farjon, A. 2010. A Handbook of the World's Conifers. Koninklijke Brill, Leiden.
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Endangered A2cd ver 3.1
Year Published: 2013
Date Assessed: 2012-01-18
Assessor(s): Thomas, P., Nguyen, T.H., Phan, K.L. & Nguyen, Q.H.
Reviewer(s): Farjon, A. & Gardner, M.
This species is currently only known from certain limestone karst areas in Viet Nam and Guangxi. Within this area there has been sufficient decline in area of occupancy, extent of occurrence and quality of habitat as a result of exploitation for its timber and from the effects of deforestation to qualify it for listing as Endangered under criterion A2cd. Previous population size estimates indicated that this species also qualified for Endangered under C1: the recent discovery of a subpopulation in Guangxi means that the C1 criterion is no longer met.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Recorded from Viet Nam in the provinces of: Bắc Kạn, Cao Bằng, Hà Giang, Hoà Bình, Nghệ An, Quảng Bình, Sơn La. The species is principally restricted to limestone karst areas of these provinces. Calocedrus rupestris has also recently been reported from Guangxi in China (Nong et al. 2011).

It may occur in adjoining provinces of Lao PDR that share the same limestone geological formations (Sơn La/Houaphan, Quảng Bình/Khammouan and Savannakhet).
Countries occurrence:
China (Guangxi); Viet Nam
Additional data:
Continuing decline in number of locations:Yes
Lower elevation limit (metres):600
Upper elevation limit (metres):1600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is rare in most provinces although it may be locally common in specific localities. The total subpopulation in Viet Nam is estimated to be less than 2,500 mature individuals. In Guangxi, the subpopulation is estimated to be about 2,100 individuals. Seedlings and regeneration of Calocedrus rupestris is rare and hence recruitment is poor.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:The species grows on rocky limestone ridges and steep slopes. Associated conifers vary according to location: Pseudotsuga sinensis, Keteleeria and Pinus sp. in the northern localities; Dacrycarpus imbricatus and Dacrydium elatum in the southern localities (Quảng Bình).
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is frequently exploited for its valuable timber which may be used for construction, furniture and fine crafts. Resin is also used.

Threats [top]

Major Threat(s): Calocedrus rupestris is threatened throughout its range by selective logging for timber, general deforestation and forest degradation.

Conservation Actions [top]

Conservation Actions: The species has been recorded from some protected areas: Phong Nha-Kẻ Bàng National Park (Quảng Bình) and Bat Dai Son Nature Reserve (Hậ Giang).

Citation: Thomas, P., Nguyen, T.H., Phan, K.L. & Nguyen, Q.H. 2013. Calocedrus rupestris. The IUCN Red List of Threatened Species 2013: e.T133722A512509. . Downloaded on 25 September 2018.
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