Juncus rigidus | UAE National Red List of Vascular Plants

Taxa
Juncus rigidus | Desf.
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
The species has a mostly coastal distribution in the UAE (Jongbloed et al. 2003), with localised populations in salt marshes, streams in wadis and permanent pools (Karim and Dakheel 2006). It has been recorded from islands off Abu Dhabi northwards to Rams (Ra's al-Khaimah) e.g., at Khor Hulaylah (Llewellyn-Smith 2011). Feulner (2016) records the species from wet wadis of the Hajar Mountains but noted that it is largely absent from Shimayliyah and from the east side of the mountains in the UAE, including Wadi Wurayah National Park (Feulner 2011), although found north of the Masafi area and as far north as tributaries of Wadi Fa'y, on the southern edge of the Ru'us al-Jibal. G. Feulner (in litt. MEW 2010) that the two main areas where the species is found are Khor Hulaylah and the Abu Dhabi islands. According to participants of the National UAE Red List Workshop (15th-19th September 2019, Dubai), this species also occurs in Wadi Siji and Sharjah. J. rigidus and J. socotranus are easily confused, and confirmation of the identity of records of J. rigidus from the mountains is required. Globally, the species occurs throughout much of Africa, including Mediterranean countries, as well as scattered localities on the northern Mediterranean coast and islands, and east through the Arabian Peninsula and Asia Minor to Pakistan (Board of Trustees, RBG Kew 2019). There are also two records from Ras al-Khaimah within the RBGE Edinburgh collections.
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
This species is a perennial rush species with creeping rhizome, found in intertidal salt marshes, wadi streams and in permanent pools. It also sometimes grows on waste ground and in disturbed areas. The flowering period is from March to June (Jongbloed et al. 2003).
Is there a map available in assessment?
Incomplete
Assessed status
Asessment status in full
Least Concern
Assessment status abreviation
LC
Assessment rationale/justification
The species has a mostly coastal distribution in the UAE, including islands, from Abu Dhabi to Ra's al-Khaimah. It is also found in the Hajar Mountains, although largely absent from the eastern side of the Hajar Mountains, with localised populations in salt marshes, streams in wadis and permanent pools. Although coastal populations, especially in Abu Dhabi, will have been impacted by intensive urban development, it is not thought that levels of decline will be such as to qualify for a threatened category, and the species occurs in more than ten locations. The species is assessed as Least Concern, however, monitoring of the larger coastal populations is required.
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
Subpopulations are inferred to be declining as a result of the transformation of coastal habitats.
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Scientific Name Kingdom Phylum Class Order Family Genus
Juncus rigidus Plantae Tracheophyta Liliopsida Poales Juncaceae Juncus