Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Caryophyllales Amaranthaceae

Scientific Name: Achyranthes talbotii
Species Authority: Hutch. & Dalziel

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2014
Date Assessed: 2014-09-03
Assessor(s): Cheek, M.
Reviewer(s): Onana, J.-M.
This taxon was treated in Cable and Cheek (1998) as Endangered, being then recorded from only three sites, the type collection from Oban District, Nigeria and the Mt Cameroon collections on the Onge and Joke rivers. However, with the additional collections from Baseng in the Jide Valley, Nyandong in western Bakossi, the Banyang-Mbo Wildlife Sanctuary and from Bu, NW Region, together with the records of this taxon from two rivers in Littoral previously omitted, it is was downgraded to Vulnerable by Darbyshire in Cheek et al. (2004) and in Onana and Cheek (2011) since it was known from 10 locations. Although the area of occupancy is still small (68 km2) and within the thresholds for the Vulnerable category, it is now known from more than ten locations. The species is therefore listed as Near Threatened (almost qualifies for listing under criterion B2ab(iii)) as there is still continuing decline in parts of its range and the populations needs ongoing monitoring to ensure that it does not move back into a threatened category should any of the known locations be lost.
Previously published Red List assessments:
2004 Vulnerable (VU)
2000 Endangered (EN)

Geographic Range [top]

Range Description: Recorded from Nigeria: Cross River State (two collections); Cameroon, SW Region: Mt Cameroon (eight collections), S Region: Bakundu F.R. (one collection), Bakossi (two collections), Banyang-Mbo (one collection), NW Region: Bu (one collection), Littoral Region: nr. Nkongjok (one collection), nr. Yingui (one collection).
Countries occurrence:
Cameroon; Nigeria
Estimated area of occupancy (AOO) - km2: 68
Number of Locations: 12-13
Upper elevation limit (metres): 750
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: More records of this species are being made indicating that it is commoner than thought when it was first assessed (Cable and Cheek 1998). However, it is almost certainly declining in parts of its range.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: A herb found in fast-flowing rivers, growing half submerged, rooting among boulders; often around waterfalls; 0-750 m alt.
Systems: Freshwater
Continuing decline in area, extent and/or quality of habitat: Yes

Threats [top]

Major Threat(s): The proposed conversion of lowland forest around Mt Cameroon to plantation is likely to threaten the plant communities of the rivers that drain the area, such as the Onge, an important site for this taxon, through flooding and excessive silting of their habitat. Illegal logging for timber in lowland Bakossi is likely to have a similar impact. Potentially, hydro-electric projects might threaten this species by reducing water course flow rates.

Conservation Actions [top]

Conservation Actions: Botanical surveys of other suitable sites in the SW and other Regions should reveal further subpopulations of this taxon. Monitoring of the riparian plant communities in response to increased upstream run-off should be carried out. Probably occurs in protected areas across its range.

Citation: Cheek, M. 2014. Achyranthes talbotii. The IUCN Red List of Threatened Species 2014: e.T39471A2927093. . Downloaded on 10 October 2015.
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