Wetmore, Clifford M.Bennet, James P.2014-07-082014-07-081992-12Wetmore CM, Bennett JP. NPlichens: A National Park Service Lichen Data Base. Final Report. 1992:1-31.https://hdl.handle.net/11299/1638021 PDF computer file (31 pages)Many lichen species are very sensitive to some air pollutants and and can be used to monitor these air pollutants in the National Parks. It is therefore desirable to know what lichens are present in different park units. This report describes a project undertaken to create computer files of lists of species known to occur in the National Park Service (NPS) units for loading into a computer database. Information was obtained from the literature, from internal NPS reports, and from the University of Minnesota Herbarium. Ninety-three park units out of 3ti0 have some lichen records. The literature search found 288 papers reporting lichens from 87 units. All lichen names were standardized to Egan's Checklist of North American Lichens. Files were produced for each park and were processed with several custom-written computer programs. The 93 park files listed the lichen name, the reference to its occurrence in the park, and whether the name was first described from the park. There are numerous natural area park units with poorly known lichen floras which are recommended for future study. Other recommendations are for periodic updates of the data base, for the production of a user manual for the database, and for the protection of the type localities in the parks.en-USLichensReport