Halopyrum mucronatum | UAE National Red List of Vascular Plants

Taxa
Halopyrum mucronatum | (L.) Stapf
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
Within the UAE, this species is restricted to coastal areas of the Arabian Gulf, from at least Ra's Ghanadha at the northern end of the Al Taweela coastal plains (Brown et al. 2007) to Ra's al Khaimah (Jongbloed et al. 2003) in the north, and recorded from at least one offshore island (Zirku Island, Abu Dhabi Emirate; Brown et al. 2007). In addition, Western (1983a) recorded the species from Abu Dhabi Island and noted that the species formed a dominant broad belt for up to 100 m inland from north of Ra's Ghanadha, behind a clearly-defined barrier beach. Western (1983b) recorded the species from the seaward shore of Abu Dhabi Island, and that it persisted even after levelling and back-filling with material in early 1982. Al Meharibi et al. (2019) show presence to Abu Dhabi Island, hence perhaps the species does indeed persist there. Western also collected the species from Saadiyat Island (date uncertain, but assumed to be the 1980's). The estimated EOO is 14,328 km<sup>2</sup> and it is considered to occur at between 5-10 locations. Globally, its native range spans from Egypt south to Mozambique in Africa, Madagascar, through the Arabian Peninsula to India (Board of Trustees, RBG Kew 2018).
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
A tough stoloniferous perennial grass that is usually found in coastal sand, forming mounds just above the highest tide line, with rhizomes spreading to several meters, forming tussocks (Jongbloed et al. 2003). It is a relatively specialised species, being found only within coastal sand dune habitats. Flowers from September until November (Jongbloed et al. 2003). It is dormant during the summer (Brown et al. 2007).
Is there a map available in assessment?
Yes
Assessed status
Asessment status in full
Vulnerable
Assessment status abreviation
VU
Assessment status criteria
B1ab(ii,iii,v)
Assessment rationale/justification
Within the UAE, this species is restricted to coastal areas of the Arabian Gulf, from Abu Dhabi to Ra's al Khaimah, and recorded from at least one offshore island (Zirku Island). Western (1983a) recorded the species from Saadiyat Island and from Abu Dhabi Island, where it persisted even after levelling and back-filling with material in early 1982. The estimated extent of occurrence (EOO) is 14,328 km<sup>2</sup> and this species is considered to occur at between 5-10 locations, based on the threat of ongoing development. In addition, this development is causing a continuing decline in the extent and quality of the available habitat, especially as a result of it habitat specificity. Therefore, this species is assessed as Vulnerable (B1ab(ii,iii,v)). No regional adjustment is made as the extent of any rescue effect is not known.
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
Grazing by livestock may impact the species in parts of its range, however the impacts from coastal development have been significant in terms of declines in this species. Known localities, such as Saadiyat Island, are now very developed which reduces the likelihood of this species persisting there.
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Further information
History
Coastal development within the UAE has been increasing in frequency and intensity since 1996, reducing the extent and quality of available habitat for this species.
Scientific Name Kingdom Phylum Class Order Family Genus
Halopyrum mucronatum Plantae Tracheophyta Liliopsida Poales Poaceae Halopyrum