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

Arthonia cupressina Tuck.

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Scientific name
Arthonia cupressina
Author
Tuck.
Common names
 
IUCN Specialist Group
Lichens
Kingdom
Fungi
Phylum
Ascomycota
Class
Arthoniomycetes
Order
Arthoniales
Family
Arthoniaceae
Assessment status
Pending
Proposed by
Erin Tripp
Contributors
Erin Tripp
Comments etc.
Anders Dahlberg

Assessment Status Notes

Taxonomic notes


Why suggested for a Global Red List Assessment?

Arthonia cupressina (Golden Spruce Dots) is endemic to the Appalachian Mountains of Eastern North America and is known from only 9 total collections. Five of these date to the late 1800s. The remaining four were collected in 1965, 2004, 2012, and 2012. The three collections from the 21st Century all derive from environments of extremely high quality (Great Smoky Mountains National Park [2 collections, these made very near to one another] and Cape Chignecto Provincial Park [1 collection]), where such refugia for very rare species with narrow ecological affinities might be expected.

In addition to being restricted to only high-quality habitats, Golden Spruce Dots occurs only on the bark of large, very mature Picea rubens (Red Spruce).

Current threats to the only know two known extant populations of Golden Spruce Dots include air pollution, fog pollution, habitat degregation (massive dieoff of keystone species in habitat occupied by Golden Spruce Dots), and global warming (in light of climate change, suitable habitat for potential migration of this species may not exist for hundreds to over 1,000 miles proximal to known populations).


Geographic range

Cape Chignecto Provincial Park and Great Smoky Mountains National Park


Population and Trends

Known from 9 total collections, only three of which are modern, this species is in global decline

Population Trend: Deteriorating


Habitat and Ecology

Restricted to bark of very mature Picea rubens (Red Spruce)


Threats

Current threats to the only two known extant populations of Golden Spruce Dots include air pollution, fog pollution, habitat degradation (massive die-off of keystone species in habitat occupied by Golden Spruce Dots), and global warming (in light of climate change, suitable habitat for potential migration of this species may not exist for hundreds to over 1,000 miles proximal to known populations).


Conservation Actions

None at present (lichens are for the most part excluded from conservation activities in the United States)


Research needed

(1) Basic fieldwork in attempt to document new populations, (2) ecological work to model suitable habitat, then finally (3) testing models by checking identified suitable habitats for new populations.


Use and Trade


Bibliography

lichenportal.com (the most extensive database of all lichen collections in the United States)


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted