• 1Proposed
  • 2Under Assessment
  • 3Preliminary Assessed
  • 4Assessed
  • 5Published

Bryoria carlottae Brodo & D. Hawksw.

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Scientific name
Bryoria carlottae
Brodo & D. Hawksw.
Common names
IUCN Specialist Group
Assessment status
Proposed by
Jessica Allen
Jessica Allen
Comments etc.
Toby Spribille, Anders Dahlberg

Assessment Notes

Taxonomic notes

Why suggested for a Global Red List Assessment?

This species is very narrowly endemic to Queen Charlotte’s Island and southeast Alaska; it is only known from five locations. This species should be listed because of it’s rarity and very restricted range.

Geographic range

This species is narrowly endemic to Queen Charlotte Islands and southeast Alaska. This is a common distribution pattern that is well documented for other groups of organisms and is likely due to this region being a glacial refugia during the Pleistocene (Hetherington et al. 2003).

Population and Trends

No research has been done to document the number and size of B. carlottae populations.

Population Trend: Uncertain

Habitat and Ecology

On trees in forested habitats.

Temperate Forest


The rarity and very narrow distribution of this species makes it susceptible to extinction due to stochastic events. This threat of extinction is exacerbated by climate change and air pollution.

Air-borne pollutantsClimate change & severe weather

Conservation Actions

Ensuring that populations of this species are not affected by any human recreation or resource extraction activity is essential. Additionally, it should be listed in the United States as an endangered species and in Canada it should be protected by COSEWIC. Additionally, education and training of land managers and local botanists to identify the species should be conducted, and contracted experts should be hired to conduct detailed monitoring at various time intervals (every 5 to 10 years).

Site/area protectionSite/area managementEducation & awarenessLaw & policyNational level

Research needed

Research on the population size and genetics would greatly enhance our understanding of this species. Additionally, long-term monitoring projects need to be conducted.

Population size, distribution & trendsLife history & ecologyPopulation trendsHabitat trends

Use and Trade


Hetherington, R., J. V. Barrie, R. G. B. Reid, R. MacLeod, D. J. Smith, T. S. James, and R. Kung. 2003. Late Pleistocene coastal paleogeography of the Queen Charlotte Islands, British Columbia, Canada, and its implications for terrestrial biogeography and early postglacial human occupation. Canadian Journal of Earth Science 40: 1755-1766.

Brodo, I. M. and D. L. Hawksworth. 1977. Alectoria and allied genera in North America. - Opera Bot. 42: 1-164.

Country occurrence

Regional Population and Trends

Country Trend Redlisted