The western United States is experiencing significant changes in wildfire and snow regimes as a result of warming temperatures. An amplification of wildfire activity and reduction in snow water equivalent, snow covered area, and earlier spring snowmelt are documented trends that are projected to continue into the future. With an...
Phytophthora lateralis is the causal agent of cedar root rot, a fatal forest pathogen whose principal host is Chamaecyparis lawsoniana (Port-Orford-cedar), a predominantly riparian-restricted endemic tree species of ecological, economical, and cultural importance to coastal Oregon and California. Local scale distribution of P. lateralis is thought to be associated with...
Sections of the landscape in north central Oregon are
dominated by numerous soil mounds surrounded by stone rings. Mounds
vary in size and shape depending on slope and mound density. Internal
soil mass is free of stones to the bedrock level and is covered
by successive layers of volcanic ash....
Spatial variation in the diet of the northern spotted owl (Strix occidentalis caurina) influences owl home ranges, and understanding this relationship will aid managers in forest management prescriptions that influence spotted owl recovery. This study describes the spatial variation in owl diet based on 4183 prey collected at 114 owl...
There are conflicts between commercial and agricultural
uses of land bordering U. S. Highway 201 southbound from
Ontario, Oregon. A questionnaire was developed and administered
to businesses located along Highway 201 to determine the most
important location factors for commercial users of the ribbon
development. The most important factors were...
Seal Rock (35LNC14) is a late prehistoric shell midden site located on the central Oregon coast. Information derived from the faunal remains, radiocarbon dates, and location and size of the midden deposits suggest the site represents a late littoral stage of cultural adaptation. Analyses of lithic artifacts, and bone and...
This research focuses on events surrounding the activities of Battery
Freeman, a coastal defense facility constructed within the earthworks of "old" Fort
Stevens near Astoria, OR, in 1900 and destroyed in 1939. Archival data are used
in conjunction with nearly 5,000 artifacts that were recovered from archaeological
excavations in 1989...
An integrative method for monitoring glacier geometry change and mass balance is presented and applied to the Pacific Northwest, USA. Acting as a baseline for interpretation of future changes in glacier size and shape, we first derive a new inventory of regional glacier cover using remotely sensed data. To investigate...
The search for and discovery of early archaeological sites is an inherently geoarchaeological problem. Archaeological sites of late Pleistocene-age are known to be located in the Intermountain West, however, the record of these early sites remains limited to only a few examples. In the lower Salmon River canyon (LSRC), the...
The net mass balance fluctuations of Arctic and Sub-Arctic glaciers, north of 47.5°
North latitude, are described over a 45-year period from 1957 to 2002 using two
parameters derived from a gridded climatology reanalysis. Variability among 185
measured glaciers was represented according to two main components. The first
component represents...