Discocactus bahiensis 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Caryophyllales Cactaceae

Scientific Name: Discocactus bahiensis
Species Authority: Britton & Rose
Taxonomic Source(s): Hunt, D., Taylor, N. and Charles, G. (compilers and editors). 2006. The New Cactus Lexicon. dh Books, Milborne Port, UK.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c ver 3.1
Year Published: 2013
Date Assessed: 2010-06-04
Assessor(s): Machado, M., Braun, P., Taylor, N.P. & Zappi, D.
Reviewer(s): Superina, M., Goettsch, B.K. & Chanson, J.S.
Facilitator/Compiler(s): Bilz, M.
This species is listed as Vulnerable based on an estimated past population decline of greater than 30% as a result of the ongoing decline in area and quality of the species habitat.
Previously published Red List assessments:
2002 Endangered (EN)

Geographic Range [top]

Range Description: This species is endemic to Brazil. It grows in the Rio São Francisco drainage of northern Bahia and Pernambuco; in Ceará it is found along the drainage of the river Jaguaribe, and in northwestern Piauí near the Rio Canindé. It occurs at altitudes between 380 and 650 m asl. The species has a very patchy distribution; and its area of occupancy is less than 500 km2.
Countries occurrence:
Brazil (Bahia, Ceará, Pernambuco, Piauí)
Estimated area of occupancy (AOO) - km2: 100-500
Lower elevation limit (metres): 380
Upper elevation limit (metres): 650
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This cactus occurs in fragmented patches within a wide range. Some subpopulations are extensive, but most of them are small and consist of less than 500 mature individuals. About 30 percent of the population has already disappeared due to habitat loss, in particular related to the construction of the Sobradinho dam and roads, as well as urbanization. The population trend is decreasing. Since the last survey the species has been found at additional sites, some of which are relatively large.
Current Population Trend: Decreasing
Additional data:

Habitat and Ecology [top]

Habitat and Ecology: This northern caatinga element grows on exposed, gravelly river terraces amongst limestone or iron-stained quartzite as well as in seasonally inundated river floodplains within the caatinga. Its generation length is 15 to 20 years.
Systems: Terrestrial
Generation Length (years): 10-15

Use and Trade [top]

Use and Trade: The seeds and entire plants are collected for ornamental use, and the stems are harvested for making candy.

Threats [top]

Major Threat(s): Part of the range of this caatinga endemic was flooded as a consequence of the construction of the Sobradinho dam in the 1970s. Other parts suffer the impact of urbanization, agriculture, construction activities, and quarrying of limestone. The plant is also subject to collection.

Conservation Actions [top]

Conservation Actions: The species is probably not found in any protected area. The subpopulations at the edges of its range should be granted some sort of protection. All species of the genus Discocactus are listed in CITES Appendix I.

Citation: Machado, M., Braun, P., Taylor, N.P. & Zappi, D. 2013. Discocactus bahiensis. The IUCN Red List of Threatened Species 2013: e.T40943A2945542. . Downloaded on 30 November 2015.
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