Browsing by Author "Bennet, James P."

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    2000 Elemental Analyses of Lichens in three Arkansas and Missouri Wilderness Areas: Final report
    (2001-04) Bennet, James P.; Wetmore, Clifford M.
    In the final report of the first study of the lichens and air quality in the Hercules Glades Wilderness of the Mark Twain National Forest (Wetmore, 1992a) it was recommended that a re-study of the elemental analysis of lichens be done every five years. The present report is on the restudy done in 2000. This report also includes comparison with new collections from Caney Creek Wilderness of the Ouachita National Forest and Upper Buffalo River Wilderness of the Ozark National Forest. In the present study lichens were collected during May, 2000 at the same localities as the previous studies in Hercules Glades by the second author. The methods used were the same as in the previous studies. The increases at Hercules Glades appear to be occurring in the eastern part of the wilderness near Hercules Lookout Tower and Long Creek. Nutritional elements have decreased concurrently in the same part of the wilderness compared to the western part. Elemental analysis values for Caney Creek and Upper Buffalo River were comparable to other areas studied and seem to be in the normal range for clean areas. It is also recommended that further studies be done in Hercules Glades to discover the causes for the increases in elemental levels since the original study.
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    NPlichens: A National Park Service Lichen Data Base: Final report
    (1992-12) Wetmore, Clifford M.; Bennet, James P.
    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.