Dipcadi biflorum | UAE National Red List of Vascular Plants

Taxa
Dipcadi biflorum | Ghaz.
Publication
UAE National Red List of Vascular Plants
Location
Countries in Assessment
United Arab Emirates
Country ISO code(s)
ARE
Does the assessment cover a marine EEZ area(s)?
Off
Scope (Assessment)
National
Taxon
Taxonomic Group
Plants
Taxonomic Group Level 2
Flowering Plants
Assessed taxon level
Species
Taxon distribution as listed in assessment
This species has been recorded at Qarn Nizwa (Jongbloed et al. 2003). More recently, it has also been recorded at Jebel Hafeet (Sakkir and Brown 2013). It is also known from Jebel Fayah and was previously recorded from Khor Zawra, although this locality was recently converted into a golf course. The estimated extent of occurrence for this species is 1,432 km<sup>2</sup>. The global distribution of this species comprises the south-east of the Arabian Peninsula and western Socotra (Board of Trustees, RBG Kew 2019).
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
This is a perennial bulb species. It has two or three narrow, curled leaves and is found in gravel in low, limestone hills (Jongbloed et al. 2003). Flowering takes place from February to March, producing two brown flowers per plant, but only after rains (Jongbloed et al. 2003).
Is there a map available in assessment?
Yes
Assessed status
Asessment status in full
Endangered
Assessment status abreviation
EN
Assessment status criteria
B1ab(iii,iv,v)
Assessment rationale/justification
This species has a restricted distribution within the UAE, consisting of two major subpopulations. These populations are considered to be severely fragmented. At least one of its known localities, Khor Zawra, has been lost due to land being converted into a golf course. Ongoing development is occurring at other sites, such as Jebel Hafeet, and this suggests that the overall population is declining. The estimated EOO for this species is 1,432 km<sup>2</sup> which falls within the threshold for threatened categories. Therefore, this species is assessed as Endangered (EN B1ab(iii,iv,v)).
About the assessment
Assessment year
2019
Assessors/contributors/reviewers listed
UAE National Red List Workshop
Affliation of assessor(s)/contributors/reviewers listed on assessment
Government
IGO
Assessor affiliation specific
Government|IGO
Criteria system
Criteria system specifics
IUCN v3.1 + Regional Guidelines v4.0
Criteria system used
IUCN
Criteria Citation
IUCN. 2012. IUCN Red List Categories and Criteria: Version 3.1, Second edition. IUCN, Gland, Switzerland and Cambridge, UK. iv + 32pp pp. And IUCN. 2012. Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
Endemism
Endemic to region
Not_assigned
Endemism Notes
Is an endemic?: Not_assigned
Conservation
Threats listed in assessment
This species may be at risk from development at Jebel Hafeet. One of its previous localities, Khor Zawra, has been lost due to land conversion for use as a golf course.
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Further information
History
This species has been fragmented with a small distribution in the past, with a backcast listing of EN B1ab(iii). Threats due to ongoing development and land conversion are still having a negative impact on this species.
Scientific Name Kingdom Phylum Class Order Family Genus
Dipcadi biflorum Plantae Tracheophyta Liliopsida Asparagales Asparagaceae Dipcadi