Much work is presently being done concerning small scale heterogeneities in the
earth's crust. These heterogeneities range from pores in sedimentary rocks up to
fluctuations in the density and seismic constants of the earth's crust with scale lengths
of kilometers. The ability to study and quantify these heterogeneities using seismic...
This dissertation describes patterns in epiphytic macrolichen community composition along a nitrogen deposition gradient in the Yosemite region of the Sierra Nevada in California. This region is part of the largest federal air quality Class 1 designated air-shed in the western United States, covering the entire crest of the Sierra...
HUC: 170900.
Bounding coordinates: West Bounding Coordinate: -123.769586; East Bounding Coordinate: -121.631074; North Bounding Coordinate: 45.941295; South Bounding Coordinate: 43.350360.
As part of investigations to evaluate the suitability of sheep grazing in Douglas-fir (Pseudotsuga menziesii) plantations of Oregon's Coast Range, this research was designed to evaluate the effectiveness of sheep grazing in suppressing unwanted vegetation, determine seasonal variations in forage quality, and investigate the impact of sheep grazing on big...