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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
Plantae	Tracheophyta	Cycadopsida	Cycadales	Cycadaceae

Scientific Name:	Cycas changjiangensis
Species Authority:	N.Liu
Synonym(s):	Cycas hainanensis subsp. changjiangensis (N.Liu) N.Liu

Assessment Information [top]

Red List Category & Criteria:	Endangered A4acd; B1ab(i,iii,v)+2ab(i,iii,v) ver 3.1
Year Published:	2010
Date Assessed:	2009-10-31
Assessor(s):	Chen, J-R
Reviewer(s):	Donaldson, J.S. & Bösenberg, J.D.
Justification: Declining due to ongoing habitat destruction that is estimated to reduce its habitat by >50% over one generation. This trend cannot be extrapolated over three generations, but it indicates at least a decline of 50% over three generations. Therefore classified as Endangered. Also qualifies under criterion B due to small extent of occurrence and area of occupancy, and occurrence at fewer than five locations.
Previously published Red List assessments:	2003 – Endangered (EN)

Geographic Range [top]

Range Description:	This species is restricted to a small area near Bawanling, Changjiang County, Western Hainan Island, China. Occurs at 600 to 800 m.
Countries occurrence:	Native: China (Hainan)
Estimated area of occupancy (AOO) - km2:	2
Number of Locations:	3
Lower elevation limit (metres):	600
Upper elevation limit (metres):	800
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	It is estimated that approximately 2,000 plants exist in the wild in a few subpopulations. The natural habitat is not good agricultural land.
Current Population Trend:	Decreasing
Additional data:	♦Number of mature individuals: 2000 ♦Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology:	This species grows on hills and rocky slopes and on deeper sandy soils among grass and low shrubs, or in open broad-leaved forests, with tropical climate of hot, wet summers and hot, dry winters.
Systems:	Terrestrial
Generation Length (years):	40

Threats [top]

Major Threat(s):

Some subpopulations of C. changjiangensis are severely degraded and numbers have dwindled. Populations have been affected by habitat destruction that is due mainly to construction. Plants are also still being removed from the wild.

Conservation Actions [top]

Conservation Actions:

This species is listed on Appendix II of the CITES Appendices. Plants occur in the Bawangling Nature Reserve.