assessment by: seddon, m.b. · 2017. 8. 24. · actinella armitageana is endemic to the madeiran...

The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T501A13056250

Actinella armitageana

Assessment by: Seddon, M.B.

View on www.iucnredlist.org

Citation: Seddon, M.B. 2013. Actinella armitageana. The IUCN Red List of Threatened Species 2013:e.T501A13056250. http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T501A13056250.en

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Taxonomy

Kingdom Phylum Class Order Family

Animalia Mollusca Gastropoda Stylommatophora Hygromiidae

Taxon Name: Actinella armitageana (Lowe, 1852)

Taxonomic Notes:

Assessment Information

Red List Category & Criteria: Vulnerable D2 ver 3.1

Year Published: 2013

Date Assessed: September 30, 2010

Justification:

Although it could meet the criteria for Endangered, this species was originally considered to beborderline between Vulnerable and Near Threatened, based on the scale of the threats in this protectedarea. The main part of the range lies close to the area of a major fire that occurred in August 2010, andhence this species is listed as Vulnerable (VU) D2, based on the close proximity of the sites containingthe sub-populations, the small area of suitable habitat and the vulnerability of the habitat to changefrom changes in grazing patterns or possibility of habitat degradation with reduced rainfall andincreased risk of fires. It was originally listed as Vulnerable in 1994, and reaffirmed as Vulnerable D2 in2000 (Seddon, pers. comm., 2009). If parts of the range have been lost as part of the fire in August2010, then a higher threat category should be considered, but survey work is required to confirm thecurrent distribution along the ridge.

Previously Published Red List Assessments

2000 – Vulnerable (VU)

1996 – Not Evaluated (NE)

1994 – Vulnerable (V)

Geographic Range

Range Description:

Actinella armitageana is endemic to the Madeiran Archipelago, where it is found on the island ofMadeira. It is only found on the summit ridges around Pico Areiro and Pico Ruivo where it is uncommon(Seddon 2008, p.75, 174, Map 101).

Country Occurrence:

Native: Portugal (Madeira)

© The IUCN Red List of Threatened Species: Actinella armitageana – published in 2013.http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T501A13056250.en

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Distribution Map


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PopulationThe population trend is unknown, but this species is always found to be rare and localised in surveysbetween 1981 and 2000 (Seddon, pers. comm., 2009 , based on data from Robert Cameron andLaurence Cook, National Museum of Wales surveys and Brian Coles)

Current Population Trend: Unknown

Habitat and Ecology (see Appendix for additional information)This species is found in grass tussocks around small crags and amongst scree on the high parts of thesummit ridges.

Systems: Terrestrial

Use and TradeThis species is not used.

Threats (see Appendix for additional information)This species is found in high elevation grasslands with limited habitats close of crags and screes, wherethe major threats are changes in grazing regimes and potential disturbance from recreational activitiessuch as path construction, litter, grass fires.

Conservation Actions (see Appendix for additional information)This species is mainly found in protected area. Further survey work is required to confirm the currentdistribution along the ridge.

Credits

Assessor(s): Seddon, M.B.

Reviewer(s): Cameron, R., Groh, K., Teixeira, D., Abreu, C., Cuttelod, A. & Neubert, E.

Contributor(s): Abreu, C. & Killeen, I.


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BibliographyIUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: http://www.iucnredlist.org.(Accessed: 16 June 2011).

Seddon, M.B. 2008. An illustrated compendium ofthe landsnails and slugs of the Madeiran archipelago.Studies in Biodiversity and Systematics of Terrestrial Organisms from the National Museum of Wales.Biotir Reports.

CitationSeddon, M.B. 2013. Actinella armitageana. The IUCN Red List of Threatened Species 2013:e.T501A13056250. http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T501A13056250.en

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External ResourcesFor Images and External Links to Additional Information, please see the Red List website.


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Appendix

Habitats(http://www.iucnredlist.org/technical-documents/classification-schemes)

Habitat Season Suitability MajorImportance?

4. Grassland -> 4.4. Grassland - Temperate - Unknown -

0. Root -> 6. Rocky areas (eg. inland cliffs, mountain peaks) - Unknown -

Threats(http://www.iucnredlist.org/technical-documents/classification-schemes)

Threat Timing Scope Severity Impact Score

1. Residential & commercial development -> 1.3.Tourism & recreation areas

Ongoing Whole (>90%) Negligible declines Mediumimpact: 6

Stresses: 1. Ecosystem stresses -> 1.2. Ecosystem degradation

2. Agriculture & aquaculture -> 2.3. Livestock farming& ranching -> 2.3.1. Nomadic grazing

Ongoing Whole (>90%) Causing/couldcause fluctuations

Mediumimpact: 7

Stresses: 1. Ecosystem stresses -> 1.2. Ecosystem degradation

Conservation Actions in Place(http://www.iucnredlist.org/technical-documents/classification-schemes)

Conservation Actions in Place

In-Place Land/Water Protection and Management

Occur in at least one PA: Yes

Percentage of population protected by PAs (0-100): 90

Research Needed(http://www.iucnredlist.org/technical-documents/classification-schemes)

Research Needed

1. Research -> 1.2. Population size, distribution & trends

Additional Data Fields

Distribution

Estimated area of occupancy (AOO) (km²): 20

Estimated extent of occurrence (EOO) (km²): 100


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Distribution

Number of Locations: 5

Population

Population severely fragmented: No

Habitats and Ecology

Continuing decline in area, extent and/or quality of habitat: No


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The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T501A13056250

The IUCN Red List Partnership

The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global SpeciesProgramme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCNRed List Partners are: BirdLife International; Botanic Gardens Conservation International; ConservationInternational; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; TexasA&M University; Wildscreen; and Zoological Society of London.

THE IUCN RED LIST OF THREATENED SPECIES™


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assessment by: seddon, m.b. · 2017. 8. 24. · actinella armitageana is endemic to the madeiran...

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