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

Texosporium sancti-jacobi (Tuck.) Nádv. ex Tibell & Hofsten

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Scientific name
Texosporium sancti-jacobi
Author
(Tuck.) Nádv. ex Tibell & Hofsten
Common names
 
IUCN Specialist Group
Lichens
Kingdom
Fungi
Phylum
Ascomycota
Class
Lecanoromycetes
Order
Teloschistales
Family
Caliciaceae
Assessment status
Preliminary Assessed
Preliminary Category
EN B2ab(i,ii,iii,iv,v)
Proposed by
Jessica Allen
Assessors
Jason Hollinger, Daphne Stone
Contributors
Jason Hollinger
Comments etc.
Jessica Allen

Assessment Notes

Justification

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.


Taxonomic notes


Why suggested for a Global Red List Assessment?


Geographic range

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.


Threats

Grazing, fire, development, agriculture, cheatgrass invasive species, misguided restoration activities, fuel breaks.

Housing & urban areasAgro-industry farmingNomadic grazingAgro-industry grazing, ranching or farmingRoads & railroadsRecreational activitiesIncrease in fire frequency/intensityNamed speciesNutrient loadsSoil erosion, sedimentation

Conservation Actions

Listed G2 in US (United States Rare Lichen Project (S. K. Pittam 1990, pers. comm.))
California?
Oregon?
Washington?
Idaho?
Recommendations… e.g., exclosures

Site/area protectionInvasive/problematic species controlHabitat & natural process restorationAwareness & communications

Research needed

Estimates of population size and trend would be helpful for improving threat assessment.
Use of exclosures to understand its ecology better.

Population size, distribution & trendsLife history & ecologyThreatsArea-based Management PlanPopulation trends

Use and Trade

This species has no known commerical or cultural uses.


Bibliography


Known distribution - countries

Regional Population and Trends

Country Trend Redlisted