• Proposed
  • Under Assessment
  • VUPreliminary Assessed
  • 4Assessed
  • 5Published

Hypotrachyna riparia McCune

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Scientific name
Hypotrachyna riparia
Author
McCune
Common names
 
IUCN Specialist Group
Lichens
Kingdom
Fungi
Phylum
Ascomycota
Class
Lecanoromycetes
Order
Lecanorales
Family
Parmeliaceae
Assessment status
Preliminary Assessed
Preliminary Category
VU A4ce
Proposed by
Daphne Stone
Assessors
Daphne Stone, John Villella
Reviewers
Jessica Allen

Assessment Notes

other assessors Heather Root

Justification

AOO=36 km2 (not required)
EOO=9658 km2 (double check extra WA site)
Locations=9
Generation length=10 yr, 30 year

Documented decline of ~25% in the past year and an inferred decline of at least 5% in the next 29 years, Vulnerable A4c.
Emerald Ash borer.


Taxonomic notes

Described by Bruce McCune
Type locality from east of Salem, OR


Why suggested for a Global Red List Assessment?

extremely limited range, large fires in 2020 nearby, one subpopulation likely extirpated. DS has list of known locations.


Geographic range

Endemic to Oregon and Washington. Known from the foothills of the central western Cascade Range in Clackamas, Lane, Linn, and Marion Counties in Oregon. Documented on the Willamette National Forest in Oregon. Documented on Northwest Oregon BLM District. Documented in Fisherman’s Bend Recreation Site in Linn County, Oregon.


Population and Trends

One site (Fisherman’s bend, largest or second largest subpopulation) in Oregon substantially impacted by large wildfire in 2020. The majority of individuals were lost in the fire, which represents ~25% reduction in the overall population size.

Population Trend: Decreasing


Habitat and Ecology

It’s most frequently found on shrubs, growing on twigs, and is also found on twigs and boles of deciduous trees (e.g., Fraxinus).

Temperate Forest

Threats

large wildfires spreading through forests on west side of the Cascades
Controlled burns may pose a threat to undocumented locations
Cottage Grove site - BLM land with potential for logging impacts.
The species occurs at Fisherman’s bend campground, where intentional thinning may pose a threat.
Emerald ash borer, anticipated to disperse to Oregon soon - loss of substrate and habitat (find citation/supporting information for timing here)

Unintentional effects: large scale (species being assessed is not the target) [harvest]Recreational activitiesIncrease in fire frequency/intensity

Conservation Actions

Surveys, management plan
Monitoring


Research needed


Use and Trade


Bibliography


Country occurrence

Regional Population and Trends

Country Trend Redlisted