Dioon edule
Taxonomy [top]
| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| PLANTAE | TRACHEOPHYTA | CYCADOPSIDA | CYCADALES | ZAMIACEAE |
| Scientific Name: | Dioon edule |
| Species Authority: | Lindl. |
| Synonym/s: |
Dioon edule Lindl. Wittmack
Dioon imbricatum Miq.
Dioon strobilaceum Lem. ex A.DC
Zamia maeleni Miq.
|
Assessment Information [top]
| Red List Category & Criteria: | Near Threatened ver 3.1 | ||||||
| Year Published: | 2010 | ||||||
| Assessor/s: | Chemnick, J. & Gregory, T. | ||||||
| Reviewer/s: | Donaldson, J.S. & Bösenberg, J.D. | ||||||
|
Justification: Regarded as Near Threatened due to the decline over the past 50 years, which in some subpopulations is estimated as >50%. Would qualify as Vulnerable under criterion A2 if decline increased. |
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| History: |
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Geographic Range [top]
| Range Description: | This species is endemic to Mexico where it is widely distributed in the Sierra Madre Oriental. Plants are centered in two areas nl. central Veracruz in an area near to Xalapa and then in an area spanning northern Hidalgo, Querétaro, San Luis Potosí, and southern Tamaulipas states. |
| Countries: |
Native:
Mexico (Hidalgo, Querétaro, San Luis Potosí, Tamaulipas, Veracruz)
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| Range Map: | Click here to open the map viewer and explore range. |
Population [top]
| Population: | This species is known from many localities, with many thousands of adult plants. Some populations have declined substantially, but overall decline is relatively low. A few of the populations were visited between 1998 and 2005 and a total of 141,500 plants were recorded. |
| Population Trend: |
Decreasing
|
Habitat and Ecology [top]
| Habitat and Ecology: | This species grows in areas transitional between tropical deciduous forest and oak woodland, in rocky areas and on steep cliffs. |
| Systems: | Terrestrial |
Threats [top]
| Major Threat(s): | This species has been affected by habitat destruction and over-collecting for ornamental purposes. |
Conservation Actions [top]
| Conservation Actions: | This species is listed on Appendix II of the CITES Appendices. It is also protected by local communities. |
Bibliography [top]
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De Luca, P., Sabato, S. and Vazquez Torres, M. 1982. Distribution and variation of Dioon edule (Zamiaceae). Brittonia 34(3): 355-362. Donaldson, J.S. 2006. Notes. Donaldson, J.S. (ed.). 2003. Cycads. Status Survey and Conservation Action Plan. IUCN/SSC Cycad Specialist Group. IUCN, Gland, Switzerland and Cambridge, UK. Hill, K.D. and Stevenson, D.W. 1998-2006. The Cycad Pages. Available at: http://plantNet.rbgsyd.gov.au/plantNet/cycad/. IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010). Jones, D.L. 1993. Cycads of the World. Reed, New Holland, Frenchs Forest, N.S.W., Australia. Octavio-Aguilar, P., Gonzalez-Astorga, J. and Vovides, A.P. 2008. Population dynamics of the Mexican cycad Dioon edule Lindl. (Zamiaceae): life history stages and management impact. Biological Journal of the Linnean Society 157: 381-391. Vovides, A.P. 1990. Spatial distribution, survival, and fecundity of Dioon edule (Zamiaceae) in tropical deciduous forest in Veracruz, México, with notes on its habitat. American Journal of Botany 77: 1532-1543. Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon. |
| Citation: | Chemnick, J. & Gregory, T. 2010. Dioon edule. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 25 May 2012. |
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