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Gynura sechellensis

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA ASTERALES COMPOSITAE

Scientific Name: Gynura sechellensis
Species Authority: (Baker) Hemsl.

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2011
Assessor/s: Gerlach, J.
Reviewer/s: Hilton-Taylor, C. & Lutz, M.L.
Contributor/s:
Justification:
Gynura sechellensis is restricted to Mahé and Silhouette, where it is known from several subpopulations. The extent of occurrence (EOO) is 1,200 km² and the area of occupancy (AOO) is 10 km². All known subpopulations are small and recruitment is poor. Genetic factors may be operating, and if most of these subpopualtions are not viable a higher threat category may be appropriate. It is currently listed as Vulnerable.

Geographic Range [top]

Range Description: Endemic to Seychelles, this species occurs on Mahé and Silhouette. The EOO and AOO are 1,200 km² and 10 km² respectively.
Countries:
Native:
Seychelles (Seychelles (main island group))
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The current population size and trend are unknown.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Found in high forest above 400 m asl and in hygrophylic habitats in rocky areas. May exceptionally occur near sea-level.
Systems: Terrestrial

Threats [top]

Major Threat(s): Threatened by ongoing habitat deterioration caused by invasive species (especially Cinnamomum verum) and poor reproduction. Seed fertility on Mahé island appears to be very low, possibly caused by inbreeding depression in isolated subpopulations or a lack of pollination. Seed set is higher on Silhouette island.

Conservation Actions [top]

Conservation Actions: Present in Morne Seychellois and Silhouette National Park. Research into reproductive biology, fertility and population genetics should be carried out.
Citation: Gerlach, J. 2011. Gynura sechellensis. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 26 May 2013.
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