The IUCN Red List of Threatened Species™
ISSN 2307-8235 (online)
IUCN 2008: T45013A10971221
Portulaca sedifolia
Assessment by: Miller, A.
View on www.iucnredlist.org
Citation: Miller, A. 2004. Portulaca sedifolia. The IUCN Red List of Threatened Species 2004:
e.T45013A10971221. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
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THE IUCN RED LIST OF THREATENED SPECIES™
Taxonomy
Kingdom
Phylum
Class
Order
Family
Plantae
Tracheophyta
Magnoliopsida
Caryophyllales
Portulacaceae
Taxon Name: Portulaca sedifolia A.G.Mill.
Assessment Information
Red List Category & Criteria:
Endangered B2ab(iii) ver 3.1
Year Published:
2004
Date Assessed:
April 30, 2004
Annotations:
Needs Updating
Justification:
Portulaca sedifolia is restricted to a limestone ridge at the extreme western end of Soqotra with a total
estimated area of occupancy of less than 10 km². At present the rapid development of the island poses
no threat to this unique habitat: the area is inhospitable, inaccessible by road and there is a lack of
potable water. However, its restricted distribution and the very limited extent of the niche which it
occupies means that it is vulnerable to any change. It is strongly suspected that this marginal habitat is
threatened by the long-term trend of lower rainfall in the region and would be particularly vulnerable to
the effects of global warming.
Geographic Range
Country Occurrence:
Native: Yemen (Socotra)
© The IUCN Red List of Threatened Species: Portulaca sedifolia – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
1
Distribution Map
© The IUCN Red List of Threatened Species: Portulaca sedifolia – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
2
Population
Current Population Trend: Unknown
Habitat and Ecology (see Appendix for additional information)
Only known from the ridge above Jebel Shu'ub where it occurs in small depressions on limestone slabs
on an exposed ridge. Flower measurements based on buds; no fully open flowers have been seen.
Systems: Terrestrial
Credits
Assessor(s):
Miller, A.
Reviewer(s):
Abuzinada, A.H. & AL-Eisawi, D.M.H. (Arabian Plants Red List Authority)
© The IUCN Red List of Threatened Species: Portulaca sedifolia – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
3
Bibliography
IUCN. 2004. 2004 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 23
November 2004.
Miller, A.G. and Morris, M. 2004. Ethnoflora of the Soqotra Archipelago. Royal Botanic Garden
Edinburgh, Edinburgh.
Citation
Miller, A. 2004. Portulaca sedifolia. The IUCN Red List of Threatened Species 2004: e.T45013A10971221.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
Disclaimer
To make use of this information, please check the Terms of Use.
External Resources
For Images and External Links to Additional Information, please see the Red List website.
© The IUCN Red List of Threatened Species: Portulaca sedifolia – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
4
Appendix
Habitats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Habitat
Season
Suitability
Major
Importance?
0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks)
-
Suitable
-
Threats
(http://www.iucnredlist.org/technical-documents/classification-schemes)
Threat
Timing
Scope
Severity
Impact Score
11. Climate change & severe weather -> 11.2.
Droughts
Ongoing
-
-
-
Stresses:
1. Ecosystem stresses -> 1.2. Ecosystem degradation
2. Species Stresses -> 2.1. Species mortality
© The IUCN Red List of Threatened Species: Portulaca sedifolia – published in 2004.
http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T45013A10971221.en
5
The IUCN Red List Partnership
The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species
Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN
Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation
International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas
A&M University; Wildscreen; and Zoological Society of London.
THE IUCN RED LIST OF THREATENED SPECIES™