This species warrants a rank of Endangered B2ab(i,ii,iii,iv,v) because its AOO is <500 km2, its population is severely fragmented, and its EOO and suitable habitat are under threat and are in decline. Only a few populations are in protected areas, and the population decline is thus ongoing.
Assessor/s: McMullin, T., Allen, J. & Lendemer, J.; Reviewer/s: Scheidegger, C.; Contributor(s): Dahlberg, A. & Weerakoon, G.
Brodo, I.M. &Hawksworth, D.L. (1977) Alectoria and allied genera in North America. Opera Botanica42: 1-164.
Carlberg, T. & D. Toren (2006) Sulcaria badia, sponsorship for the CALS Conservation Committee. Bulletin of the California Lichen Society13(2): 45-50.
IUCN (2019) The IUCN Red List of Threatened Species. Version 2019-3. Available at: www.iucnredlist.org. (Accessed: 10 December 2019).
McMullin, R.T. (2015) California dreaming: Perspectives of a northeastern lichenologist. Bulletin of the California Lichen Society22: 6-12.
Mote, P.W., E.A. Parson, A.F. Hamlet, W.S. Keeton, D. Lettenmaier, N. Mantua, E.L. Miles, D.W. Peterson, R. Slaughter & A.K. Snover (2003) Preparing for climatic change: the water, salmon, and forests of the Pacific Northwest. Climate Change61: 45-88.
Oregon Natural Heritage Program (2004) Rare, Threatened and Endangered Plants and Animals of Oregon. Oregon Natural Heritage Program, Portland.
Peterson, E.B., Greene, D.M., McCune, B., Peterson, E.T., Hutten, M.A., Weisberg, P., Rosentreter, R. (1998) Sulcaria badia, a rare lichen in western North America. The Bryologist101(1): 112-115.
Find out more about the IUCN Red List Categories and Criteriahere.