Gynura sechellensis 


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
Date Assessed: 2007-09-20
Assessor(s): Gerlach, J.
Reviewer(s): Hilton-Taylor, C. & Lutz, M.L.
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.
Previously published Red List assessments:
1997 Indeterminate (I)

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 occurrence:
Seychelles (Seychelles (main island group))
Estimated area of occupancy (AOO) - km2: 10
Lower elevation limit (metres): 400
Range Map: Click here to open the map viewer and explore range.

Population [top]

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

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. The IUCN Red List of Threatened Species 2011: e.T193407A8857070. . Downloaded on 01 December 2015.
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