Niebla ramosissima is narrowly endemic to San Nicolas Island where it is known from one location and its Area of Occupancy = 16 km2 (up to a maximum of 32 km2). The main threats that could rapidly drivethis species from Vulnerable to Critically Endangered or Extinct would be if invasive species and climate change transformed its natural habitat, the sea-side low-shrub vegetation with a predominance of soil crusts in Mediterranean California. Therefore, it is listed as Vulnerable, D2.
Assessor/s: Reese Næsborg, R.; Reviewer/s: Dal Forno, M.; Facilitators(s) and Compiler(s): Allen, J.
Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threatassessments with GeoCAT: geospatial conservation assessment tool. In: V. Smith & L. Penev (eds) e-Infrastructures for data publishing in biodiversity science. Zookeys150: 117–126.
Bowler, P. A. & Marsh, J.E. (2004) Niebla. In: Nash, TH, III, Ryan, B.D., Diederich, P, Gries, C. & Bungartz, F. (eds), Lichen Flora of the Greater Sonoran Desert Region, pp. 36-80. Lichens Unlimited,Tempe, Arizona.
IUCN (2020) The IUCN Red List of Threatened Species. Version 2020-3. Available at: www.iucnredlist.org. (Accessed: 10 December 2020).
Knudsen, K. & Wheeler, T. (2015) Niebla ramosissima: an endemic of San Nicolas Island. Bulletin of the California Lichen Society22(2): 33-36.
Spjut, R.W. (1996) Niebla and Vermilacinia (Ramalinaceae) from California and Baja California. Sida, Botanical Miscellany14: 1-208.
Find out more about the IUCN Red List Categories and Criteriahere.