Based in part on previous work by this researcher, variables assumed to play a minor part in the process/ response system examined by the OSU Alsea Bay Hazard Study Team (1985-87)--river input and subsequent variations in hydrology--were more completely analyzed for their range of effects on the stability of Alsea...
Plethodontid salamanders are model organisms for studying evolutionary questions of gene flow, restricted ranges, and speciation. Plethodon, a diverse genus within Plethodontidae, is widely distributed in eastern and western North America. Much research has been based in the eastern United States where diversity of these salamanders is high. Because of...
A study of mortality, food consumption, food utilization, and
polyhedral production following single and simultaneous challenges
of the variegated cutworm, Peridroma saucia (Hubner), with DDT
and a nuclear polyhedrosis virus was made. Fourth instar larvae
were challenged topically with three levels of DDT and per os with
three levels of...
In an effort to describe the plant communities and
succession of the Oregon coastal grasslands, vegetation
and environmental data were collected from 75 stands at
24 separate locations ranging from Cape Falcon in Tillamook
County to Cape Ferrelo in Curry County. The vegetation
data consisted of cover and frequency values...
Mechanisms by which plant organs accumulate
photoassimilate are important in determining final sink size
and may involve invertase activity. Because strawberry
fruit are strong sinks for sugars, changes in invertase
levels during development and mechanisms of sugar uptake
within the fruit were examined.
Fruit from greenhouse-grown, day-neutral strawberries,
(Fragaria X...
To accomplish an economic evaluation of vegetation management in
loblolly pine (Pinus taeda L.) at regeneration and a subsequent release
time, two existing growth models were linked together in a dynamic
programming analysis. The first model (Burkhart and Sprinz, 1984) provides
a projection of stands regenerated with varying hardwood components...
My thesis examines a total of fourteen characters from The Portrait of a Lady and The Turn of the Screw. Primarily, I have discovered an overwhelming pattern in these two works by Henry James; when characters make direct entrances--that is when they are not described or discussed in absentia by...
At a spatially heterogeneous mixed-conifer forest in the central California Sierras, we quantified total
carbon (C) and nitrogen (N), inorganic N, and net N mineralization in organic (O) and surface (0–15 cm) mineral
soils, and in situ fluxes of inorganic N and ortho-phosphate using resin lysimeters under three patch types:...
The objectives of this investigation were to measure the seasonal and diurnal variations of starch as well as to relate these variations to growth of the trees. This study also microscopically examined the
needles to determine if starch exists in granular form in Douglas-fir. The objectives were designed to gain...