Cycas debaoensis

Y.C.Zhong & C.J.Chen

Plante

CRLR Monde (IUCN)

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Filtrer le graphe par contexte spatialPays · région · aire protégée · écorégion · biome

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Calcul du tissu écologique de Cycas debaoensis.

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Liste rouge IUCN

CR · En danger critiquecritères A4cd↘Décroissante

Évaluation complète

Évaluation: 2023 · v3.1
Altitude: 600 – 1100 m
Profondeur: – m

État de la populationTexte officiel évaluation IUCNExpert

From a study done in 2005, the total population surveyed comprised 1,125 plants in the wild. Several new sub-populations have been discovered (Zheng et al. 2017) and it is estimated that there are 1,000-3,000 plants in the wild (A. Lindström pers. comm.). The extent of the population prior to the collecting of plants over the past few decades is unknown so a direct measurement of the rate of decline is not possible. However, based on the extent of removal of plants from the wild, the decline is precautionarily estimated at between 60% and 80% over the past 60 years (< two generations), and so the ongoing rate over a three generation time period is highly likely to exceed 80%.

Menaces identifiées(2 menaces classées CMP-IUCN)

5_2_1
Intentional use (species is the target)
Rapid DeclinesMajority (50-90%)Ongoing
2_1_2
Small-holder farming
Ongoing

Description complète des menacesTexte détaillé évaluation IUCNExpert

Human disturbance within the habitat of Cycas debaoensis is evident. The subpopulation near Fuping Village is seriously depleted due to commercial harvesting. From 1997 to 2002, about 1,000 plants, mostly female trees, were harvested. At the Gula subpopulation, about 200 mature cycads were found in the gardens of two villagers. These plants had trunks of more than 15 cm in diameter and had been harvested from the neighbouring wild subpopulation. Near the Dingye subpopulation, some slopes have been planted with maize, which has a strong impact on the cycad population.

Habitats préférentiels (classification IUCN)

1_5Forest - Subtropical/Tropical Dry
3_5Shrubland - Subtropical/Tropical Dry
6Rocky areas (eg. inland cliffs, mountain peaks)

Mesures de conservation recommandéesStratégies de conservation IUCNExpert

Cycas debaoensis is listed in Appendix II of the CITES Appendices. Zheng et al. (2017) records presence in the Huanglian Mountain Reserve and Laohutiao and the County Reserve of Gulong Mountain and Defu, both in Guangxi, China. There are plans to establish a Debao Cycad Reserve. A cottage industry to save Cycas debaoensis in China has been started. Cycas debaoensis was assessed as CR B1b(iii,v)c(i,ii,iv) in the threatened species list for Chinese plants (Qin et al. 2017) but the population assessed here does not meet the criteria for listing as CR under criterion B1. Recovery and reintroduction projects have been initiated at four sites and the planned reintroduction of >7,000 plants is resulting in an increase in these subpopulations.

Actions de conservation (2)Conservation Actions Classification Scheme — IUCNExpert

1_1Site/area protection
4_3Awareness & communications

Stress écologiques (3)Stresses Classification — IUCNExpert

1_1Ecosystem conversion
1_2Ecosystem degradation
2_1Species mortality

Usage & commerce (1)Use & Trade — IUCNExpert

13Pets/display animals, horticulture
internationalnational

Priorités de recherche (2)Research Needed Classification — IUCNExpert

1_2Population size, distribution & trends
3_1Population trends

Niche IUCN globaleRealms · Systems · LMEs · Growth forms · FAOs — biogéographie IUCNExpert

Royaumes biogéographiques

IndomalayanPalearctic

Systèmes (terrestre/eau douce/marin)

Terrestrial

Formes de croissance

CycadShrub - small

Références bibliographiques (10)Sources scientifiques de l'évaluation IUCNExpert

IUCN. 2023. The IUCN Red List of Threatened Species. Version 2023-1. Available at: <a href="www.iucnredlist.org">www.iucnredlist.org</a>. (Accessed: 07 December 2023).
Huang, Y.-Y. 2018. Studies of the conservation process and taxonomy of Cycas baiseensis and Cycas debaoensis. Memoirs of the New York Botanical Garden 117: 504-518.
Zheng, Y., Liu, J., Feng, X. and Gong, X. 2017. The distribution, diversity, and conservation status of Cycas in China. Ecology and Evolution 7: 3212-3224.
Qin, H., Yang, Y., Dong, S., He, Q., Jia, Y., Zhao, L., Yu, S., Liu, H., Liu, B., Yan, Y., Xiang, J., Xia, N., Peng, H., Li, Z., Zhang, Z., He, X., Yin, L., Lin, Y., Liu, Q., Hou, Y., Liu, Y., Liu, Q., Cao, W., Li, J., Chen, S., Jin, X., Gao, T., Chen, W., Ma, H., Geng, Y., Jin, X., Chang, C., Jiang, H., Cai, L., Zang, C., Wu, J., Ye, J., Lai, Y., Liu, B., Lin, Q. and Xue, N. 2017. Threatened species list of China's higher plants. Biodiversity Science 17: 696-745.
Hill, K.D. 2008. The genus Cycas (Cycadaceae) in China. Telopea 12(1): 71-118.
Chen, J. and Stevenson, D.W. 2006. Flora of China. Available at: <a href="www.efloras.org">www.efloras.org</a>.
Jianguang, X., Shuguang, J. and Nian, L. 2005. Genetic variation in the endemic plant Cycas debaoensis on the basis of ISSR analysis. Australian Journal of Botany 53: 141-145.
Chen, C.J. and Liu, N. 2004. New Discoveries of Cycads and Advancement of Conservation of Cycads in China. Botanical Review 70(1): 93-100.
Whitelock, L.M. 2002. The Cycads. Timber Press, Portland, Oregon.
Hill, K.D. and Stevenson, D.W. 1998 - 2006. The Cycad Pages. Available at: <a href="http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/index.html">http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/index.html</a>.

Évaluateurs & contributeurs (3)Personnes ayant contribué à l'évaluation IUCNExpert

assessor

Bösenberg, J.D.

contributor

Tang, W.

evaluator

Donaldson, J.S.

Bösenberg, J.D. 2023. Cycas debaoensis. The IUCN Red List of Threatened Species 2023: e.T42038A68899343. Accessed on 05 May 2026.