The variability of heavy metal concentrations (Pb, Cd, Zn, and Cu) of the terrestrial moss Orthotrichum lyellii on single trees was evaluated at two sites in the Pacific Northwest, one relatively unpolluted and the other polluted. In addition, a reciprocal transplant of O. lyellii between the unpolluted and polluted sites...
Air pollution and pollution patterns have become a hot topic over the last several years. Many studies have been launched due to the increasing concern with air quality. As urban areas grow, atmospheric heavy metal pollution grows proportionally. Reducing atmospheric heavy metal pollution, and consequent health issues, requires monitoring and...
Mountain pine beetle, Dendroctonus ponderosae Hopkins, is a primary agent of forest disturbance in western North America. Episodic outbreaks occur at the convergence
of favorable forest age and size class structure and climate patterns. Recent outbreaks have exceeded the historic range of variability of D. ponderosae-caused tree
mortality affecting ecosystem...
We report first-year results from two field experiments evaluating the effectiveness of various techniques for the control of pest plants in Fender's blue butterfly habitat. In the woody-plant study, we monitored the effects of mowing, mowing and herbicides, and burning on woody plants and key native and non-native grasses and...
Agonistic behavior among three species of Microtus live-trapped
near Corvallis, Oregon was recorded in order to interpret habitat
segregation by the species in areas of syrnpatry. The method used to
measure agonistic interaction was similar to that of Colvin (1970).
Agonistic behavior was recorded under red light in a neutral...
Date of coverage: 1965-1972. Sample numbers, weights of ashed tested samples, dates samples went into detector. End of book has Atomic absorption record for Zn.