- Under Assessment
- ENPreliminary Assessed
Texosporium sancti-jacobi (Tuck.) Nádv. ex Tibell & Hofsten
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- Scientific name
- Texosporium sancti-jacobi
- (Tuck.) Nádv. ex Tibell & Hofsten
- Common names
- IUCN Specialist Group
- Assessment status
- Preliminary Category
- Proposed by
- Jason Hollinger, Daphne Stone
- Jason Hollinger
- Comments etc.
- Jessica Allen
AOO is 204 km² is very restricted, with severely fragmented distribution and on-going decline in EOO, AOO, extent of habitat (owing to fire and development), subpopulations, and overall population.
Why suggested for a Global Red List Assessment?
Widespread disjunct populations in western North America, from California to Washington and Idaho.
EOO = 649,455 km2
AOO = 204 km2
Population and Trends
At least in Idaho, many known subpopulations have been extirpated by grazing, road construction, ... Some chaparral subpopulations have been extirpated by fire?
Possibly severely fragmented because dispersal mechanism of spores is unknown and likely very limited.
Population Trend: Decreasing
Habitat and Ecology
Oldgrowth, stable sagebrush and chaparral habitats.
Housing & urban areasAgro-industry farmingNomadic grazingAgro-industry grazing, ranching or farmingRoads & railroadsRecreational activitiesIncrease in fire frequency/intensityNamed speciesNutrient loadsSoil erosion, sedimentation
Grazing, fire, development, agriculture, cheatgrass invasive species, misguided restoration activities, fuel breaks.
Site/area protectionInvasive/problematic species controlHabitat & natural process restorationAwareness & communications
Listed G2 in US (United States Rare Lichen Project (S. K. Pittam 1990, pers. comm.))
Recommendations… e.g., exclosures
Population size, distribution & trendsLife history & ecologyThreatsArea-based Management PlanPopulation trends
Estimates of population size and trend would be helpful for improving threat assessment.
Use of exclosures to understand its ecology better.
Use and Trade
This species has no known commerical or cultural uses.
Known distribution - countries
Regional Population and Trends