Uptake of [14C]glycine by various size fractions of natural plankton communities was measured to determine if phytoplankton can compete effectively with other members of the plankton community for the free amino acids in seawater. The simultaneous occurrence of glycine uptake, plant pigments, and photosynthetic activity in the same size fractions,...
Beef cattle ranches provide a substantial portion of income in
Oregon. Range beef cattle ranches are located on land having relatively
low productivity and value. The ranches of interest for this study were
among the largest and most extensive in the state.
The purpose of the study was to examine...
Waterfowl and the places they inhabit provide numerous economic benefits to society. The financial and other resources provided by waterfowl hunters to secure and protect waterfowl habitat are a major force for wetland protection, as guided under the North American Waterfowl Management Plan. However, the habitat and population objectives established...
During summer and fall of 1981 to 1983, mark-recapture was
conducted in riparian and upland habitats within old-growth and
mature forests in the Cascade Range of Oregon. Number of
individuals and species richness were greater in riparian than
upland habitat. For most species, the mean adult weights and
the percentages...
The recency of the Food and Drug Administration menu-labeling regulations and the lack of research available on restaurateur response initiated this study. Advocates claim the new regulations will protect consumers and foster the selection of nutritious choices, however, critics believe the regulations will result in restaurateurs removing all nutrition information...
The term "interaction" in evolutionary biology and ecology
describes the relationships among variables in two classes of causal
models. In the first, "interaction" refers to the influence of a
single putatively causal variable on a variable of interest. In the
second class of models, the term applies when a third...
The research of genealogy and family history can represent a means of self-discovery, connection, and preservation of the past. The experience is individualistic, unique to the intricate intertwining of lives that helped create and influence who we are today. Through the analysis of historical biographies, family documents, and autobiographical vignettes,...
Wildfire impacts have intensified in many ecosystems across the western United States due to the combined impact of fire exclusion, climate change, and land management practices. However, on many of these landscapes, fire is a fundamental ecological process that has shaped vegetation structural and compositional diversity, ecosystem function, landscape pattern,...