Index Catalog // ScholarsArchive@OSU

Remineralization of phytoplankton-derived organic matter by natural populations of heterotrophic bacteria

Creator:: Burkhardt, Brian G., Watkins-Brandt, Katie S., Defforey, Delphine, Paytan, Adina, and White, Angelicque E.
Abstract:: The relative lability, elemental stoichiometry, and remineralization rates of various particulate organic matter (POM) substrates by natural heterotrophic marine microorganisms was investigated. POM was harvested from laboratory cultures of a marine diazotroph (Trichodesmium IMS101), a cosmopolitan diatom (Thalassiosira weissflogii), a common marine cyanobacteria (Prochlorococcus MED4), and from surface waters off...
Resource Type:: Article
Full Text:: organic matter by natural populations of heterotrophic bacteria Burkhardt, B. G., Watkins-Brandt, K. S

Nature and Extent of the Deep Biosphere

Creator:: Colwell, Frederick S. and D’Hondt, Steven
Abstract:: In the last three decades we have learned a great deal about microbes in subsurface environments. Once, these habitats were rarely examined, perhaps because so much of the life that we are concerned with exists at the surface and seems to pace its metabolic and evolutionary rhythms with the overt...
Resource Type:: Article
Full Text:: , Oregon 97331-5503, U.S.A. rcolwell@coas.oregonstate.edu Steven D’Hondt Graduate School of Oceanography

Large-scale bloom of Akashiwo sanguinea in the Northern California current system in 2009

Creator:: White, Angelicque E., Watkins-Brandt, Katie S., McKibben, S. Morgaine, Wood, A. Michelle, Hunter, Matthew, Forster, Zach, Du, Xiuning, and Peterson, William T.
Abstract:: Significant seabird mortality on the Oregon (OR) and Washington (WA) coast in 2009 has been attributed to a massive bloom of the dinoflagellate Akashiwo sanguinea (K. Hirasaka) G. Hansen & Ø. Moestrup. Initial, albeit limited, observations suggested this bloom began in WA and reached OR waters through southward transport. Here,...
Resource Type:: Article

Shallow Aquifer Recharge from Irrigation in a Semi-arid Agricultural Valley in New Mexico, USA

Creator:: Ochoa, Carlos G., Fernald, Alexander G., Guldan, Steven J., Tidwell, Vincent C., and Shukla, Manoj K.
Abstract:: Irrigation percolation can be an important source of shallow aquifer replenishment in arid regions of the southwestern United States. Aquifer recharge derived from irrigation percolation can be more significant in fluvial valleys overlying shallow aquifers where highly permeable soils allow rapid water infiltration and aquifer replenishment. We used data from...
Resource Type:: Article
Full Text:: AGRICULTURAL VALLEY IN NEW MEXICO, USA 2 Carlos G. Ochoa1, Alexander G. Fernald2, Steven J. Guldan3, Vincent

Does larval advection explain latitudinal differences in recruitment across upwelling regimes?

Creator:: Fisher, Jennifer L., Peterson, William T., and Morgan, Steven G.
Abstract:: Larval supply determines year-class strength of fisheries and complex ecological interactions among adults of benthic marine species. In upwelling regions, a latitudinal cline in the intensity and persistence of upwelling is thought to affect larval advection and recruitment, thereby regulating the intensity of interactions in adult populations and communities. We...
Resource Type:: Article

Subgrid Surface Fluxes in Fair Weather Conditions during TOGA COARE: Observational Estimates and Parameterization

Creator:: Vickers, Dean and Esbensen, Steven K.
Abstract:: Bulk aerodynamic formulas are applied to meteorological data from low-altitude aircraft flights to observational estimates of the subgrid enhancement of momentum, sensible heat, and latent heat the atmospheric–oceanic boundary in light wind, fair weather conditions during TOGA COARE Global Atmosphere Coupled Ocean–Atmosphere Response Experiment). Here, subgrid enhancement the contributions of...
Resource Type:: Article
Full Text:: TOGA COARE: Observational Estimates and Parameterization DEAN VICKERS AND STEVEN K. ESBENSEN College

Improvements in pollutant monitoring: Optimizing silicone for co-deployment with polyethylene passive sampling devices

Creator:: O'Connell, Steven G., McCartney, Melissa A., Paulik, L. Blair, Allan, Sarah E., Tidwell, Lane G., Wilson, Glenn, and Anderson, Kim A.
Abstract:: Sequestering semi-polar compounds can be difficult with low-density polyethylene (LDPE), but those pollutants may be more efficiently absorbed using silicone. In this work, optimized methods for cleaning, infusing reference standards, and polymer extraction are reported along with field comparisons of several silicone materials for polycyclic aromatic hydrocarbons (PAHs) and pesticides....
Resource Type:: Article
Full Text:: SAMPLING DEVICES 2 3 STEVEN G. O’CONNELL, MELISSA A. MCCARTNEY, L. BLAIR PAULIK, SARAH E. ALLAN, LANE

The Broad-Spectrum Antiviral Compound ST-669 Restricts Chlamydial Inclusion Development and Bacterial Growth and Localizes to Host Cell Lipid Droplets within Treated Cells

Creator:: Sandoz, Kelsi M., Valiant, William G., Eriksen, Steven G., Hruby, Dennis E., Allen, Robert D., III, and Rockey, Daniel D.
Abstract:: Novel broad-spectrum antimicrobials are a critical component of a strategy for combating antibiotic-resistant pathogens. In this study, we explored the activity of the broad-spectrum antiviral compound ST-669 for activity against different intracellular bacteria and began a characterization of its mechanism of antimicrobial action. ST-669 inhibits the growth of three different...
Resource Type:: Article
Full Text:: within Treated Cells Kelsi M. Sandoz,a* William G. Valiant,a Steven G. Eriksen,a Dennis E. Hruby,b

Riparian litter inputs to streams in the central Oregon Coast Range

Creator:: Hart, Stephanie K., Hibbs, David E., and Perakis, Steven S.
Abstract:: Riparian-zone vegetation can influence terrestrial and aquatic food webs through variation in the amount, timing, and nutritional content of leaf and other litter inputs. We investigated how riparianforest community composition, understory density, and lateral slope shaped vertical and lateral litter inputs to 16 streams in the Oregon Coast Range. Riparian...
Resource Type:: Article
Full Text:: University, Corvallis, Oregon 97331 USA Steven S. Perakis3 US Geological Survey, Forest and Rangeland

Contribution of Calcium Oxalate to Soil-Exchangeable Calcium

Creator:: Dauer, Jenny M. and Perakis, Steven S.
Abstract:: Acid deposition and repeated biomass harvest have decreased soil calcium (Ca) availability in many temperate forests worldwide, yet existing methods for assessing available soil Ca do not fully characterize soil Ca forms. To account for discrepancies in ecosystem Ca budgets, it has been hypothesized that the highly insoluble biomineral Ca...
Resource Type:: Article
Full Text:: Jenny M. Dauer,1 and Steven S. Perakis,2 Abstract: Acid deposition and repeated biomass harvest have

ScholarsArchive@OSU

Remineralization of phytoplankton-derived organic matter by natural populations of heterotrophic bacteria

Nature and Extent of the Deep Biosphere

Large-scale bloom of Akashiwo sanguinea in the Northern California current system in 2009

Shallow Aquifer Recharge from Irrigation in a Semi-arid Agricultural Valley in New Mexico, USA

Does larval advection explain latitudinal differences in recruitment across upwelling regimes?

Subgrid Surface Fluxes in Fair Weather Conditions during TOGA COARE: Observational Estimates and Parameterization

Improvements in pollutant monitoring: Optimizing silicone for co-deployment with polyethylene passive sampling devices

The Broad-Spectrum Antiviral Compound ST-669 Restricts Chlamydial Inclusion Development and Bacterial Growth and Localizes to Host Cell Lipid Droplets within Treated Cells

Riparian litter inputs to streams in the central Oregon Coast Range

Contribution of Calcium Oxalate to Soil-Exchangeable Calcium

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