| Citation |
|
Description |
Geographic Range [top]
Range Description: Calocedrus macrolepis has a wide distribution in southern China and SE Asia. In China it is recorded from Guangxi (Jingxi Xian), Guizhou, Hainan Island and Yunnan. Its complete distribution in Myanmar is uncertain while in Thailand it is only known from a limited area in the northeast. In Lao PDR it is currently known from several provinces adjoining the Vietnamese border (Thomas et al. 2007). In Viet Nam it is now known from the southern highlands, especially in Lam Dong Province. Previously it was thought to be more widespread but populations occurring in limestone karst areas of central and northern Viet Nam have recently been identified as a separate species, Calocedrus rupestris (Averyanov et al. 2008).
Countries occurrence:
Native:
China (Guangxi, Guizhou, Hainan, Yunnan); Lao Peoples Democratic Republic; Myanmar; Thailand; Viet Nam
Additional data:
? Estimated area of occupancy (AOO) - km2: 2100
? Lower elevation limit (metres): 800
? Upper elevation limit (metres): 2000
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: In China it has been estimated that the population comprises 196,632 plants although it is uncertain if this estimate includes re-afforested areas. The major subpopulations are found in Yunnan province. In Viet Nam and Lao PDR subpopulations are small and localized and have been severely reduced by logging and conversion of forest to agriculture. In Thailand it is only known from a small area and subpopulations are consequently small. The status of localities and subpopulations in Myanmar is uncertain.
Current Population Trend: Unknown
Additional data:
Habitat and Ecology [top]
Habitat and Ecology: In China it occurs in montane mixed evergreen conifer-broad-leaved forest dominated by Fagaceae and with scattered conifers, e.g. Cunninghamia, Keteleeria and Pinus; also in rocky places and much planted in roadsides and field margins. The altitudinal range is from ca. 800 m to 2,000 m a.s.l. Outside of China it generally occurs from 800 to 1500 m a.s.l. in evergreen hill forests. In Viet Nam and Lao PDR it occurs with Dacrycarpus imbricatus, Dacrydium elatum and Keteleeria evelyniana. It is often found along watercourses.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Unknown
Generation Length (years): 20-25
Use and Trade [top]
Use and Trade: In China this species is considered suitable for afforestation of deforested lands in its native area because of its easy germination (also grows from cuttings) and light-demanding properties combined with rapid growth. Its wood has good properties, e.g. durability, but trees tend to be much branched especially when grown in open vegetation. In Viet Nam and Lao PDR the timber and resin are highly valued for high value furniture and incense.
Threats [top]
Major Threat(s): The major threat has been overexploitation for its valuable timber throughout its range. In southern Viet Nam and Lao PDR it has also been, and continues to be threatened by forest fragmentation, forest fire and conversion of its habitat to agricultural use. In China it has been assessed as nationally Vulnerable under the IUCN A2 criterion; in Viet Nam it has been assessed as Endangered under a range of criteria. No formal assessment has been undertaken in Lao PDR, Myanmar or Thailand.
Conservation Actions [top]
Conservation Actions: In China, most plants occur near temples and so are protected. In other parts of its range it occurs in many protected areas such as Nakai Nam Theun National Biodiversity Area (Lao PDR), Bi Doup National Park (Viet Nam) and Phu Kradung in Thailand.
It has legal protection in China under the National List (2nd degree of protection). The Government of China has also imposed a recent ban on all logging. In Viet Nam it is included on the List of Rare and Precious Flora which restricts its exploitation. In Lao PDR, Myanmar and Thailand it has no formal protection.
Conservation Actions: Further research is required to establish its distribution and status in Myanmar and in the central Annamite ranges of Viet Nam and Lao PDR.
Citation: Thomas, P., Liao, W. & Yang, Y. 2013. Calocedrus macrolepis. The IUCN Red List of Threatened Species 2013: e.T32384A2817157. http://dx.doi.org/10.2305/IUCN.UK.2013-1.RLTS.T32384A2817157.en. Downloaded on 02 October 2017.
Disclaimer: To make use of this information, please check the .
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided
|
