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Common name(s): English: Old Birch Spots

ASSESSMENT JUSTIFICATION [criteria: C2a(i)]

This southern Appalachian endemic species has a restricted range, split into 10 subpopulations. The overall population size is extremely small (c.100 mature individuals), with a maximum subpopulation size of 10 mature individuals. Ongoing declines are projected to occur as a result of the impacts of climate change, and invasive pests impacting the species’ habitat. Therefore, it is listed as Critically Endangered C2a(i).

Assessor/s: Lendemer, J. & Allen, J.; Reviewer/s: Yahr, R.; Facilitator(s) and Compiler(s): Scheidegger, C.

Bibliography:

Allen, J.L. & Lendemer, J.C. (2016) Climate change impacts on endemic, high-elevation lichens in abiodiversity hotspot. Biodiversity and Conservation 25(3): 555-568.

Harris, R. C., Tripp E. A., & Lendemer, J. C. (2013) Arthopyrenia betulicola (Arthopyreniaceae, Dothidiomycetes), and unusual new lichenized fungus from high elevations of the southern Appalachian Mountains. Aliso 31: 77-81.

IUCN. 2020. The IUCN Red List of Threatened Species. Version 2020-3. Available at: www.iucnredlist.org. (Accessed: 10 December 2020).

Find out more about the IUCN Red List Categories and Criteria here.