Map_thumbnail_large_font

Scaevola socotraensis

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA CAMPANULALES GOODENIACEAE

Scientific Name: Scaevola socotraensis
Species Authority: St.John

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(iii) ver 3.1
Year Published: 2013
Date Assessed: 2012-05-02
Assessor(s): Knees, S.G., Patzelt, A. & Miller, A.
Reviewer(s): García, N. & Tognelli, M.
Contributor(s): Williams, L. & Neale, S.
Justification:
The species is known only from a few scattered populations growing near freshwater springs and seepages on the southern limestone escarpment (one location), and its area of occupancy is estimated as no more than 4 km². There are only a few of these springs and therefore the total number of plants is likely to be very low. A continuing decline in the quality of the habitat for this species has been observed due to surface water extraction, housing development, and grazing. Therefore, the species is listed as Critically Endangered.
History:
2012 Critically Endangered
2004 Endangered

Geographic Range [top]

Range Description: This species is endemic to the Island of Socotra, Yemen. The species is known only from a few scattered populations growing near freshwater springs and seepages on the southern limestone escarpment, which are considered as only one location. The area of occupancy is estimated at 4 km².
Countries:
Native:
Yemen (Socotra)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There are no data on population size and trends for this species. It is a very rare species.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It is very rare, occurring on rocks and vertical cliff faces, near seepages on the limestone escarpment overlooking the Noged Plain. It occurs at altitudes of ca 150 m (Miller and Morris 2004). There are only a few of these springs and therefore the total number of plants is likely to be very low.
Systems: Terrestrial; Freshwater

Use and Trade [top]

Use and Trade:

This species is not used.

Threats [top]

Major Threat(s): The major threat to the species is surface water extraction and housing development in the vicinity. Grazing is also a potential threat to the species (Knees pers. obs. 2012). Although not normally accessible to livestock, goats will eat it if they can reach it (Miller and Morris 2004). This habitat is extremely vulnerable to water development.

Conservation Actions [top]

Conservation Actions: In-situ protection of the habitat is highly recommended and ex-situ conservation measures should also be taken.

Citation: Knees, S.G., Patzelt, A. & Miller, A. 2013. Scaevola socotraensis. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 28 August 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided