Invertebrates are an important food source for grouse chicks, especially within the first 2 weeks of life. Invertebrate abundance is highly patchy and dependent upon herbaceous cover and vegetation structure. We examined the relationship between invertebrate biomass (from sweepnet samples) and habitat structure at lesser prairie-chicken (Tympanuchus pallidicinctus) brood-use and...
Hop (Humulus lupulus L.) is a perennial, dioecious species in which the female inflorescence (cones) are harvested and used in the beer-brewing process to impart bittering and/or flavoring to beer. Hop breeders have typically utilized clonal selection and hybridization to develop new cultivars. The use of genetically diverse parents for...
Results from a model of wind-driven circulation are analyzed to study spatial and temporal variability in
the bottom mixed layer (BML) on the mid-Oregon shelf in summer 2001. The model assimilates acoustic
Doppler profiler velocities from two cross-shore lines of moorings 90 km apart to provide improved
accuracy of near-bottom...
A primitive equation model is used to study the finite-amplitude evolution of instabilities associated with the coastal upwelling front. Simulations of increasing complexity are examined that represent idealizations of summer conditions off the Oregon coast, including cases with steady and with time-variable wind in a domain with alongshore-uniform bathymetry and...
MicroRNAs (miRNAs) are an extensive class of noncoding genes that regulate gene expression through
posttranscriptional repression. Given the potential for large viral genomes to encode these transcripts, we
examined the human cytomegalovirus AD169 genome for miRNAs using a bioinformatics approach. We
identified 406 potential stem-loops, of which 110 were conserved...
Mosquitoes and mosquitoborne disease transmission
are sensitive to hydrologic variability. If local hydrologic
conditions can be monitored or modeled at the scales at
which these conditions affect the population dynamics of
vector mosquitoes and the diseases they transmit, a means
for monitoring or modeling mosquito populations and mosquitoborne
disease transmission...
This project, to propose an implementation strategy for standard monitoring
protocols, builds on my Pacific Northwest National Laboratory Fellowship to support a
study entitled Evaluating Cumulative Ecosystem Response to Restoration Projects in the
Columbia River Estuary (Diefenderfer et al. 2005). The major objective of the study was
to develop a...