Identification Information:Rinodina brodoana is a blue-gray to brownish-gray crustose lichen that can be recognized by its growth on the bases of mature oak trees and thick, overlapping areoles with irregularly shaped soralia that appear to bubble from the surface.
Rinodina brodoana is a crustose lichen that occurs on the bases of mature oak trees in remnant, mature low- and middle elevation forests within a small area of Great Smoky Mountains National Park in eastern North America. The species has likely been historically impacted by large scale habitat loss and degradation, phenomena which are inferred to continue in lands directly adjacent to all extant populations. Increased acquisition and protection of suitable habitat, monitoring of existing populations, and raising awareness of the species are recommended conservation measures for the species.
This species is categorised as Endangered based on the area of occupancy (AOO = 16 km²), small number of total locations (n=4), and the observed decline in habitat quality. The habitat that this species occurs in has been substantially impacted by logging activities in the past, as well as by flooding of lowlands for hydroelectricity. Although the species occurs within the borders of a protected management unit, the habitat quality in this area, including local climatic conditions, could be negatively impacted by proposed resource extraction as well as road/utility corridor construction on directly adjacent federal lands that are not afforded the same protected status.
Lendemer et al. (2014) ranked the species as Critically Endangered B1ab(iii); D, however that rank should be superseded by the one proposed here based on the subsequent discovery two additional populations, albeit within the already documented geographic range.
Assessor/s: Lendemer, J.; Reviewer/s: Scheidegger, C.; Contributor(s): Weerakoon, G.
IUCN (2018) The IUCN Red List of Threatened Species. Version 2018-2. Available at: www.iucnredlist.org. (Accessed: 15 November 2018).
Lendemer, J.C., E. Tripp & J.W. Sheard (2014). A review of Rinodina (Physciaceae) in Great Smoky Mountains National Park highlights the growing significance of this “island of biodiversity” in eastern North America. The Bryologist117(3): 259-281.
Lendemer, J.C., R.C. Harris & E.A. Tripp (2013) The lichens and allied fungi of Great Smoky Mountains National Park: an annotated checklist with comprehensive keys. Memoirs of The New York Botanical Garden104( i-viii): 1-152.
Find out more about the IUCN Red List Categories and Criteriahere.