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Armeria berlengensis 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Plumbaginales Plumbaginaceae

Scientific Name: Armeria berlengensis Daveau

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B2ab(iii,v) ver 3.1
Year Published: 2011
Date Assessed: 2011-02-17
Assessor(s): Caldas, F.B.
Reviewer(s): Alves, P. & Bilz, M.
Justification:
Armeria berlengensis is endemic to the Berlenga archipelago in Portugal where it is found at three islands. Its area of occupancy is smaller than 10 km². The number of sites or the population size are not known but the subpopulations are considered severely fragmented. Significant declines have been measured in some areas. The species suffers from the impacts of seagulls overcrowding the islands and the expansion of invasive species. The species is frequently being monitored and its localities are inaccessible to humans which provides some protection. However, it is classed as Critically Endangered for the moment.

Geographic Range [top]

Range Description:Armeria berlengensis is endemic to the Berlenga archipelago, off the Portuguese coast. It occurs on the islands Berlenga, Estelas and Farilhões (ICN 2006). Its extent of occurrence is smaller than 200 km² and the area of occupancy is smaller than 10 km² as the geographic range for this species has been reported to be 0.95 km² (Commission of the European Communities 2009). The largest of the islands has an area of 1 km².
Countries occurrence:
Native:
Portugal (Portugal (mainland))
Additional data:
Estimated area of occupancy (AOO) - km2:0.95-10
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This plant has once been described as common in almost all of the islands, but significant declines have been measured in some areas (ICN 2006). The subpopulations count as severely fragmented as there is no assumed genetic exchange over the distance of the islands.
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:This sub-shrub is dispersed along the periphery of the islands. This plant grows in the Habitats Directive listed habitat 1230 "Vegetated sea cliffs of the Atlantic and Baltic Coasts" (Commission of the European Communities 2009).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): There are two main threats. First, the overcrowding of seagulls which leads to eutrophication and the gulls also use this cushion-formed plant to create their nests. Secondly, the expansion of the invasive species Carpobrotus edulis and Mesembryanthemum crystallinum leads to increased competition. However, the latter seems to be less of a problem nowadays (ICN 2006). 

Conservation Actions [top]

Conservation Actions: Armeria berlengensis is listed on Annex II of the Habitats Directive. It is legally protected in Portugal. Control and eradication of invasive species is recommended. The species is frequently being monitored and its localities are inaccessible to humans which provides protection in itself (ICN 2006).

Citation: Caldas, F.B. 2011. Armeria berlengensis. The IUCN Red List of Threatened Species 2011: e.T162004A5527623. . Downloaded on 23 September 2017.
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