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Asthenosphere–lithosphere interactions in Western Saudi Arabia: Inferences from ³He/⁴He in xenoliths and lava flows from Harrat Hutaymah

Creator:: Konrad, Kevin, Graham, David W., Thornber, Carl R., Duncan, Robert A., Kent, Adam J.R., and Al-Amri, Abdullah M.
Abstract:: Extensive volcanic fields on the western Arabian Plate have erupted intermittently over the last 30 Ma following emplacement of the Afar flood basalts in Ethiopia. In an effort to better understand the origin of this volcanism in western Saudi Arabia, we analyzed ³He/⁴He, and He, CO₂ and trace element concentrations...
Resource Type:: Article

Timing and composition of continental volcanism at Harrat Hutaymah, western Saudi Arabia

Creator:: Duncan, Robert A., Kent, Adam J.R., Thornber, Carl R., Schlieder, Tyler D., and Al-Amri, Abdullah M.
Abstract:: Harrat Hutaymah is an alkali basalt volcanic field in north-central Saudi Arabia, at the eastern margin of a large Neogene continental, intraplate magmatic province. Lava flow, tephra and spatter cone compositions in the field include alkali olivine basalts and basanites. These compositions contrast with the predominantly tholeiitic, fissure-fed basalts found...
Resource Type:: Article

Patterns in the occupancy and abundance of the globally rare lichen Erioderma pedicellatum in Denali National Park and Preserve, Alaska

Creator:: Stehn, Sarah E., Nelson, Peter R., Roland, Carl A., and Jones, Jennifer R.
Abstract:: We investigated habitat attributes related to the occupancy of the globally rare and endangered epiphytic lichen, Erioderma pedicellatum, in a newly discovered (2009) population center in Denali National Park and Preserve (DNPP), Alaska. We measured forest, tree and epiphytic lichen community characteristics on eighty-five systematically selected plots in four study...
Resource Type:: Article
Full Text:: . Nelson2,3, Carl A. Roland2, and Jennifer R. Jones2 2 Denali National Park and Preserve and Central Alaska

Detecting continuous lichen abundance for mapping winter caribou forage at landscape spatial scales

Creator:: Nelson, Peter R., Roland, Carl, Macander, Matthew J., and McCune, Bruce
Abstract:: Spatial variation of available food resources can be difficult to accurately quantify for wide ranging organisms at landscape scales. Lichens with usnic acid, a yellowish pigment, constitute a large portion of caribou winter diet across much of their range. We take a new approach of modeling lichen abundances by capitalizing...
Resource Type:: Article
Full Text:: scales Peter R. Nelson a,c,⁎, Carl Roland a, Matthew J. Macander b, Bruce McCune c a Denali National

Non-parametric methods reveal non-linear functional trait variation of lichens along environmental and fire age gradients

Creator:: Nelson, Peter R., McCune, Bruce, Roland, Carl, and Stehn, Sarah
Abstract:: Questions: Popular methods to analyse community–trait–environment relationships constrain community patterns by trait and environment relationships. What if some traits are strongly associated with community composition but unrelated to environmental variables and vice versa? We take a different approach, unconstrained by this assumption using non-parametric methods. We applied this technique to...
Resource Type:: Article

Potential gains from trading bad outputs: The case of U.S. electric power plants

Creator:: Färe, Rolf, Grosskopf, Shawna, and Pasurka, Carl A.
Abstract:: Jointly with kilowatt-hours (kWh), electric power plants also produce CO₂, NO[subscript x], and SO₂. In this paper, we apply an environmental production model based on data envelopment analysis (DEA) to compare the production of kWh under command-and-control regulation of the undesirable byproduct with tradable permit regulation of the byproduct. This...
Resource Type:: Article
Full Text:: . electric power plants Färe, R., Grosskopf, S., & Pasurka Jr, C. A. (2013). Potential gains from trading

Distribution, Stock Composition and Timing, and Tagging Response of Wild Chinook Salmon Returning to a Large, Free-Flowing River Basin

Creator:: Eiler, John H., Masuda, Michele M., Spencer, Ted R., Driscoll, Richard J., and Schreck, Carl B.
Abstract:: Chinook Salmon Oncorhynchus tshawytscha returns to the Yukon River basin have declined dramatically since the late 1990s, and detailed information on the spawning distribution, stock structure, and stock timing is needed to better manage the run and facilitate conservation efforts. A total of 2,860 fish were radio-tagged in the lower...
Resource Type:: Article
Full Text:: Basin Eiler, J. H., Masuda, M. M., Spencer, T. R., Driscoll, R. J., & Schreck, C. B. (2014

Sensitivity and specificity of histology for diagnoses of four common pathogens and detection of nontarget pathogens in adult Chinook salmon (Oncorhynchus tshawytscha) in fresh water

Creator:: Kent, Michael L., Benda, Susan, St-Hilaire, Sophie, and Schreck, Carl B.
Abstract:: Histology is often underutilized in aquatic animal disease screening and diagnostics. The agreement between histological classifications of infection and results using diagnostic testing from the American Fisheries Society's Blue Book was conducted with 4 common salmon pathogens: Aeromonas salmonicida, Renibacterium salmoninarum, Ceratomyxa shasta, and Nanophyetus salmincola. Adult Chinook salmon (Oncorhynchus...
Resource Type:: Article
Full Text:: . Kent,1 Susan Benda, Sophie St-Hilaire, Carl B. Schreck Abstract. Histology is often underutilized in

Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A.

Creator:: Clemens, Benjamin J., Mesa, Matthew G., Magie, Robert J., Young, Douglas A., and Schreck, Carl B.
Abstract:: We describe the migration distances and timing of the adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River Basin (Oregon, U.S.A.). We conducted aerial surveys to track radio-tagged fish upstream of a major waterfall and hydropower complex en route to spawning areas. We detected 24 out of the 43 fish...
Resource Type:: Article
Full Text:: & Douglas A. Young & Carl B. Schreck Received: 21 December 2010 /Accepted: 10 July 2011 /Published online

On Nonparametric Estimation: With a Focus on Agriculture

Creator:: Färe, Rolf, Grosskopf, Shawna, Pasurka, Carl, and Martins-Filho, Carlos
Abstract:: We review nonparametric estimation of efficiency and productivity, by which we mainly mean activity analysis, or data envelopment analysis (DEA). The review covers topics that we hope will be of special interest to those doing research in the realm of agriculture. We also include a brief appendix addressing nonparametric estimation...
Resource Type:: Article
Full Text:: Agriculture On Nonparametric Estimation: With a Focus on Agriculture Färe, R., Grosskopf, S., Pasurka, C

ScholarsArchive@OSU

Asthenosphere–lithosphere interactions in Western Saudi Arabia: Inferences from ³He/⁴He in xenoliths and lava flows from Harrat Hutaymah

Timing and composition of continental volcanism at Harrat Hutaymah, western Saudi Arabia

Patterns in the occupancy and abundance of the globally rare lichen Erioderma pedicellatum in Denali National Park and Preserve, Alaska

Detecting continuous lichen abundance for mapping winter caribou forage at landscape spatial scales

Non-parametric methods reveal non-linear functional trait variation of lichens along environmental and fire age gradients

Potential gains from trading bad outputs: The case of U.S. electric power plants

Distribution, Stock Composition and Timing, and Tagging Response of Wild Chinook Salmon Returning to a Large, Free-Flowing River Basin

Sensitivity and specificity of histology for diagnoses of four common pathogens and detection of nontarget pathogens in adult Chinook salmon (Oncorhynchus tshawytscha) in fresh water

Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A.

On Nonparametric Estimation: With a Focus on Agriculture

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