Riparian forests in the Idaho Panhandle, north of Whitebird, were surveyed for
rare riparian lichen species. The region was stratified into nine geographic units and
by stream size. Eighty-one plots were surveyed for lichen community, stand and river
characteristics. Variables important to lichen community composition included
regional differences, elevation, climatic affinity, floodplain cross-section type, and the
amount of basal area in hardwoods. Seventeen species were reported to be rare or
uncommon in northern Idaho by lichenologists familiar with eastern Washington,
northern Idaho and northwestern Montana. Of the seventeen target species, Cetraria
sepincola, Pseudocyphellaria anomala, Ramalina pollinaria and Ramalina
subleptocarpha were determined to be rare, with less than 25 occurrences each in
northern Idaho. Lobaria hallii, Physconia americana, and Ramalina thrausta were
determined to be locally abundant when found, but should continue to be species of
concern in northern Idaho because of their limited distribution and narrow habitat
requirements. Collema curtisporum is more common in the riparian forests of
northern Idaho than previously thought, but appears to be restricted to old Populus
balsamfera ssp. trichocarpa (black cottonwood) stands that receive seasonal
inundation. Collema occultatum, Nephroma laevigatum, Leptogium cellulosum,
Phaeophyscia hirtella, and P. ciliata are all new records for northern Idaho.
Management recommendations include maintaining or restoring natural flood cycles
in riparian forests and protecting mature black cottonwood stands on floodplains. / Graduation date: 2002
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/29583 |
| Date | 01 June 2001 |
| Creators | Hutchinson, Jenifer L. |
| Contributors | McCune, Bruce |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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