Map_thumbnail_large_font

Cupressus chengiana var. chengiana

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA PINOPSIDA PINALES CUPRESSACEAE

Scientific Name: Cupressus chengiana var. chengiana
Parent Species:
Common Name(s):
English Cheng Cypress
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Vulnerable B2ab(v) ver 3.1
Year Published: 2013
Date Assessed: 2010-12-13
Assessor(s): Zhang, D & Christian, T.
Reviewer(s): Thomas, P. & Farjon, A.
Justification:

The area of occupancy (AOO) is less than 2,000 km2 with less than 10 severely fragmented locations.  A continuing decline in the number of mature individuals is suspected due to illegal logging. Past reductions are known to have occurred but have not been quantified. Consequently this variety (and the species as this variety accounts for the vast majority of the specie's distribution and population) is assessed as Vulnerable.


History:
2000 Vulnerable
1997 Vulnerable (Walter and Gillett 1998)

Geographic Range [top]

Range Description: This variety is found in China: south Gansu, north and west Sichuan.
Countries:
Native:
China (Gansu, Sichuan)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population is thought to be decreasing due to historic and recent over-exploitation.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It is found in small, pure stands in some valleys, but more commonly on rocky slopes or cliffs associated with Koelreuteria paniculata, Morus mongolica, Campylotropis delavayi, Bauhinia faberi, Cotoneaster multiflorus, and C. gracilis; in non-acidic brown soils over granites, quartzites and limestones. Based on verified herbarium collections, the altitudinal range is extensive, ranging from ca. 1200 m to 2750 m a.s.l [Atlas of the Gymnosperms of China gives 900-2800m asl]. The climate is characterized by cold winters and cool to warm summers, with a distinct alternation of dry and rainy seasons; annual precipitation varies between 500-750(-1000 mm), with a 50-70% moisture deficit. There is no recorded difference in ecology for the two varieties.
Systems: Terrestrial

Use and Trade [top]

Use and Trade: Timber is valued for building and it has been exploited for its larger, more or less straight trunks for many centuries. On a small scale trees have been planted as individuals or in groups in villages.

Threats [top]

Major Threat(s): This variety is known from ca. 9 different locations where natural populations are now mostly restricted to more inaccessible sites such as canyons and exposed cliffs. Overcutting is the main cause of its [historic] decline but the habitat is now protected (see conservation actions). Illegal logging may still be a problem in certain locations. Natural regeneration is thought to be poor.

Conservation Actions [top]

Conservation Actions: This variety is planted in villages within its natural range in Sichuan and possibly in Gansu as well. Since 1998, all old-growth forest in China has been legally protected.

Citation: Zhang, D & Christian, T. 2013. Cupressus chengiana var. chengiana. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 27 November 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
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