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Description |
Geographic Range [top]
Range Description: This species occurs in central Thailand, and in Viet Nam in the central plateau region from Buon Ma Thuot to Pleiku (Dac Lac and Kon Tum), with a disjunct occurrence in Thanh Hoa and Nghe An provinces in the north. Also recorded from Cambodia and Myanmar and probably also occurs in Lao PDR. Has been recorded up to 300 m asl.
Countries occurrence:
Native:
Myanmar (Myanmar (mainland)); Thailand; Viet Nam
Upper elevation limit (metres): 300
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species is widespread and locally extremely abundant.
Current Population Trend: Decreasing
Additional data:
?Number of mature individuals: 10000-12000
?Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology: This species occurs in seasonally dry monsoon forests with a warm, humid and rainy season, followed by a hot season of drought. This vegetation is fire prone. In Thailand plants grow on limestone derived soils and in crevices of limestone boulders. In Viet Nam plants grow on sandy, rocky soil in disturbed grassland or in the understorey of dry, rocky, open forest.
Systems: Terrestrial
Generation Length (years): 40
Threats [top]
Major Threat(s): C. siamensis is threatended due to forest clearing for agricultural purposes and this has drastically reduced available habitat. Furthermore, too frequent fires are also having an effect on the habitat. This species has also been over-collected to be sold as ornamentals. Although its habitat is continually being reduced, large populations remain, and it is not under any immediate threat of extinction.
Conservation Actions [top]
Conservation Actions: This species is listed on Appendix II of the CITES Appendices. Populations of this species are protected in the Yok Don National Park in Viet Nam.
Citation: Nguyen, H.T. 2010. Cycas siamensis. The IUCN Red List of Threatened Species 2010: e.T42066A10641954. http://dx.doi.org/10.2305/IUCN.UK.2010-3.RLTS.T42066A10641954.en. Downloaded on 13 April 2016.
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