Index Catalog // ScholarsArchive@OSU

Water quality criteria for an acidifying ocean: Challenges and opportunities for improvement

Creator:: Weisberg, Stephen B., Bednaršek, Nina, Feely, Richard A., Chan, Francis, Boehm, Alexandria B., Sutula, Martha, Ruesink, Jennifer L., Hales, Burke, Largier, John L., and Newton, Jan A.
Abstract:: This is PMEL Contribution 4396. Acidification has sparked discussion about whether regulatory agencies should place coastal waters on the Clean Water Act 303(d) impaired water bodies list. Here we describe scientific challenges in assessing impairment with existing data, exploring use of both pH and biological criteria. Application of pH criteria...
Resource Type:: Article
Full Text:: opportunities for improvement Stephen B. Weisberg a, *, Nina Bednar�sek b, Richard A. Feely c, Francis Chan d

Impacts of Coastal Acidification on the Pacific Northwest Shellfish Industry and Adaptation Strategies Implemented in Response

Creator:: Barton, Alan, Waldbusser, George G., Feely, Richard A., Weisberg, Stephen B., Newton, Jan A., Hales, Burke, Cudd, Sue, Eudeline, Benoit, Langdon, Chris J., Jefferds, Ian, King, Teri, Suhrbier, Andy, and McLaughlin, Karen
Abstract:: In 2007, the US west coast shellfish industry began to feel the effects of unprecedented levels of larval mortality in commercial hatcheries producing the Pacific oyster Crassostrea gigas. Subsequently, researchers at Whiskey Creek Shellfish Hatchery, working with academic and government scientists, showed a high correlation between aragonite saturation state (Ω[subscript]arag)...
Resource Type:: Article
Full Text:: Implemented in Response By Alan Barton, George G. Waldbusser, Richard A. Feely, Stephen B. Weisberg, Jan A

Core Principles of the California Current Acidification Network: Linking Chemistry, Physics, and Ecological Effects

Creator:: McLaughlin, Karen, Weisberg, Stephen B., Dickson, Andrew G., Hofman, Gretchen E., Newton, Jan A., Aseltine-Neilson, Deborah, Barton, Alan, Cudd, Sue, Feely, Richard A., Jefferds, Ian W., Jewett, Elizabeth B, King, Teri, Langdon, Chris J., McAfee, Skyli, Pleschner-Steele, Diane, and Steele, Bruce
Abstract:: Numerous monitoring efforts are underway to improve understanding of ocean acidification and its impacts on coastal environments, but there is a need to develop a coordinated approach that facilitates spatial and temporal comparisons of drivers and responses on a regional scale. Toward that goal, the California Current Acidification Network (C-CAN)...
Resource Type:: Article
Full Text:: Flight Center, and ORBIMAGE By Karen McLaughlin, Stephen B. Weisberg, Andrew G. Dickson, Gretchen E

Sectoral output multipliers for rural counties : lessons from Oregon's input-output studies

Creator:: Weber, Bruce A., Mandelbaum, Thomas B., and Wood, Stephen B.
Abstract:: People interested in economic development in rural communities are often faced with the need to estimate impacts of economic changes or to forecast population, employment, business activity, or public service demands. An economic "tool" that is often used to assist in this task is the "multiplier." This circular is designed...
Resource Type:: Technical Report

Spatial Patterns of Ergot and Quantification of Sclerotia in Perennial Ryegrass Seed Fields in Eastern Oregon

Creator:: Dung, Jeremiah K. S., Alderman, Stephen C., Walenta, Darrin L., Hamm, Philip B., and Alderman, Stephen C.
Abstract:: Ergot, caused by Claviceps purpurea, is a major disease of perennial ryegrass grown for seed in eastern Oregon. The objective of this research was to quantify and describe the spatial patterns of ergot severity in each of three 50-ha commercial fields of perennial ryegrass grown for seed in 2012 and...
Resource Type:: Article
Full Text:: , Madras; Stephen C. Alderman, United States Department of Agriculture–Agricultural Research Service

Uptake of glycine by natural phytoplankton communities

Creator:: Wheeler, Patricia A., North, B., Littler, M., and Stephens, G.
Abstract:: 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,...
Resource Type:: Article
Full Text:: WHEELER, P., B. NORTH, M. LITTLER, AND G. STEPHENS. Uptake of

Amino acid uptake by marine phytoplankters

Creator:: Wheeler, Patricia A., North, Barbara B., and Stephens, Grover C.
Abstract:: Axenic cultures of 25 species of unicellular marine algae were tested for their ability to utilize nine common amino acids, supplied at high concentrations in batch culture, as a nitrogen source; most species were able to use several amino acids, although growth was often slower than on nitrate nitrogen. The...
Resource Type:: Article
Full Text:: marine phytoplankters1*2 Patricia A. Wheeler, Barbara B. North, and Grover C. Stephens Department of

Rapid Quantification of Soilborne Pathogen Communities in Wheat-based Long-term Field Experiments

Creator:: Smiley, Richard W., Machado, Stephen, Rhinhart, Karl E. L., Reardon, Catherine L., and Wuest, Stewart B.
Abstract:: This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by The American Phytopathological Society and can be found at: https://doi.org/10.1094/PDIS-09-15-1020-RE
Resource Type:: Article
Full Text:: Communities in Wheat-based Long-term Field Experiments Richard W. Smiley, Stephen Machado, and Karl E

Afternoon Ascospore Release in Claviceps purpurea Optimizes Perennial Ryegrass Infection

Creator:: Alderman, Stephen C., Walenta, Darrin L., Hamm, Philip B., Martin, Ruth C., Dung, Jeremiah, and Kosman, Evsey
Abstract:: In Kentucky bluegrass (Poa pratensis), Claviceps purpurea, the causal agent of ergot, typically releases ascospores during the early-morning hours, between about midnight and 10:00 A.M., corresponding to time of flowering, when the unfertilized ovaries are most susceptible to infection. During aeromycology studies of C. purpurea in perennial ryegrass (Lolium perenne)...
Resource Type:: Article

Effects of Two Environmental Best Management Practices on Pond Water and Effluent Quality and Growth of Nile Tilapia, Oreochromis niloticus

Creator:: Frimpong, Emmanuel A., Ansah, Yaw B., Amisah, Stephen, Adjei-Boateng, Daniel, Agbo, Nelson W., and Egna, Hillary
Abstract:: The trajectory of aquaculture growth in sub-Saharan Africa has necessitated closer attention to the use of environmental best management practices (BMPs). Two BMPs in particular, water reuse and floating feeds, are being promoted for adoption by pond fish farmers in sub-Saharan Africa. In this study, we investigated: (1) the effect...
Resource Type:: Article
Full Text:: , Oreochromis niloticus Frimpong, E. A., Ansah, Y. B., Amisah, S., Adjei-Boateng, D., Agbo, N. W., & Egna, H

ScholarsArchive@OSU

Water quality criteria for an acidifying ocean: Challenges and opportunities for improvement

Impacts of Coastal Acidification on the Pacific Northwest Shellfish Industry and Adaptation Strategies Implemented in Response

Core Principles of the California Current Acidification Network: Linking Chemistry, Physics, and Ecological Effects

Sectoral output multipliers for rural counties : lessons from Oregon's input-output studies

Spatial Patterns of Ergot and Quantification of Sclerotia in Perennial Ryegrass Seed Fields in Eastern Oregon

Uptake of glycine by natural phytoplankton communities

Amino acid uptake by marine phytoplankters

Rapid Quantification of Soilborne Pathogen Communities in Wheat-based Long-term Field Experiments

Afternoon Ascospore Release in Claviceps purpurea Optimizes Perennial Ryegrass Infection

Effects of Two Environmental Best Management Practices on Pond Water and Effluent Quality and Growth of Nile Tilapia, Oreochromis niloticus

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