AOO=36 km2 (not required)
EOO=9658 km2 (double check extra WA site)
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.
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.
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).
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