Index Catalog // ScholarsArchive@OSU

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Creator:: Tepley, Alan J., Swanson, Frederick J., and Spies, Thomas A.
Abstract:: Early‐seral ecosystems make important contributions to regional biodiversity by supporting high abundance and diversity of many plant and animal species that are otherwise rare or absent from closed‐canopy forests. Therefore, the period of post‐fire tree establishment is a key stage in forest stand and ecosystem development that can be viewed...
Resource Type:: Article
Full Text:: Oregon, USA ALAN J. TEPLEY,1,3,� FREDERICK J. SWANSON,2 AND THOMAS A. SPIES2 1Departments of

Isotopic constraints on the pre-industrial oceanic nitrogen budget

Creator:: Somes, C. J., Oschlies, A., and Schmittner, A.
Abstract:: The size of the bioavailable (i.e., “fixed”) nitrogen inventory in the ocean influences global marine productivity and the biological carbon pump. Despite its importance, the pre-industrial rates for the major source and sink terms of the oceanic fixed nitrogen budget, N₂ fixation and denitrification, respectively, are not well known. These...
Resource Type:: Article
Full Text:: nitrogen budget C. J. Somes1, A. Oschlies1, and A. Schmittner2 1GEOMAR Helmholtz-Zentrum f̈ur

The stability and calibration of water vapor isotope ratio measurements during long-term deployments

Creator:: Bailey, A., Noone, D., Berkelhammer, M., Steen-Larsen, H. C., and Sato, P.
Abstract:: With the recent advent of commercial laser absorption spectrometers, field studies measuring stable isotope ratios of hydrogen and oxygen in water vapor have proliferated. These pioneering analyses have provided invaluable feedback about best strategies for optimizing instrumental accuracy, yet questions still remain about instrument performance and calibration approaches for multi-year...
Resource Type:: Article
Full Text:: temperature of the enclosed rack was maintained at 15.0± 0.2 ◦C. The water vapor volume mix- ing ratio

The stability and calibration of water vapor isotope ratio measurements during long-term deployments

Creator:: Bailey, A., Noone, D., Berkelhammer, M., Steen-Larsen, H. C., and Sato, P.
Abstract:: With the recent advent of commercial laser absorption spectrometers, field studies measuring stable isotope ratios of hydrogen and oxygen in water vapor have proliferated. These pioneering analyses have provided invaluable feedback about best strategies for optimizing instrumental accuracy, yet questions still remain about instrument performance and calibration approaches for multi-year...
Resource Type:: Article
Full Text:: , H. C., & Sato, P. (2015). The stability and calibration of water vapor isotope ratio measurements

A dual isotope approach to isolate soil carbon pools of different turnover times

Creator:: Torn, M. S., Kleber, M., Zavaleta, E. S., Zhu, B., Field, C. B., and Trumbore, S. E.
Abstract:: Soils are globally significant sources and sinks of atmospheric CO₂. Increasing the resolution of soil carbon turnover estimates is important for predicting the response of soil carbon cycling to environmental change. We show that soil carbon turnover times can be more finely resolved using a dual isotope label like the...
Resource Type:: Article
Full Text:: . Kleber3, E. S. Zavaleta4, B. Zhu1, C. B. Field5, and S. E. Trumbore6 1Earth Sciences Division, Lawrence

Selenium Supplementation Restores Innate and Humoral Immune Responses in Footrot-Affected Sheep

Creator:: Hall, Jean A., Vorachek, William R., Stewart, Whitney C., Gorman, M. Elena, Mosher, Wayne D., Pirelli, Gene J., and Bobe, Gerd
Abstract:: Dietary selenium (Se) alters whole-blood Se concentrations in sheep, dependent upon Se source and dosage administered, but little is known about effects on immune function. We used footrot (FR) as a disease model to test the effects of supranutritional Se supplementation on immune function. To determine the effect of Se-source...
Resource Type:: Article
Full Text:: and Humoral Immune Responses in Footrot-Affected Sheep Jean A. Hall1*, William R. Vorachek1, Whitney C

The Aryl Hydrocarbon Receptor Mediates Leflunomide- Induced Growth Inhibition of Melanoma Cells

Creator:: O’Donnell, Edmond F., Kopparapu, Prasad Rao, Koch, Daniel C., Jang, Hyo Sang, Phillips, Jessica Lynne, Tanguay, Robert L., Kerkvliet, Nancy I., and Kolluri, Siva Kumar
Abstract:: A novel role of the dihydroorotatedehydrogenase (DHODH) inhibitor leflunomide as a potential anti-melanoma therapy was recently reported (Nature 471: 518-22, 2011). We previously reported that leflunomide strongly activates the transcriptional activity of the Aryl Hydrocarbon Receptor (AhR). We therefore tested whether the AhR regulates the anti-proliferative effects of leflunomide in...
Resource Type:: Article
Full Text:: , Daniel C. Koch1,2,5, Hyo Sang Jang1,2,5, Jessica Lynne Phillips1,3,5, Robert L. Tanguay2,3,4,5, Nancy I

A Numerical Examination of ¹⁴CO₂ Chamber Methodologies for Sampling at the Soil Surface

Creator:: Egan, Jocelyn, Nickerson, Nick, Phillips, Claire, and Risk, Dave
Abstract:: Radiocarbon is an exceptionally useful tool for studying soil-respired CO₂, providing information about soil carbon turnover rates, depths of production, and the biological sources of production through partitioning. Unfortunately, little work has been done to thoroughly investigate the possibility of inherent biases present in current measurement techniques, like those present...
Resource Type:: Article
Full Text:: Communications in Mass Spectrometry 24(2): 180–4. Phillips CL, Nickerson N, Risk D, Kayler Z, Andersen C, Mix

Where to find 1.5 million yr old ice for the IPICS “Oldest-Ice” ice core

Creator:: Fischer, H., Severinghaus, J., Brook, Edward J., Wolff, E., Albert, M., Alemany, O., Arthern, R., Bentley, C., Blankenship, D., Chappellaz, J., Creyts, T., Dahl-Jensen, D., Dinn, M., Frezzotti, M., Fujita, S., Gallee, H., Hindmarsh, R., Hudspeth, D., Jugie, G., Kawamura, K., Lipenkov, V., Miller, H., Mulvaney, R., Parrenin, F., Pattyn, F., Ritz, C., Schwander, J., Steinhage, D., van Ommen, T., and Wilhelms, F.
Abstract:: The recovery of a 1.5 million yr long ice core from Antarctica represents a keystone of our understanding of Quaternary climate, the progression of glaciation over this time period and the role of greenhouse gas cycles in this progression. Here we tackle the question of where such ice may still...
Resource Type:: Article
Full Text:: . Brook3, E. Wolff4,*, M. Albert5, O. Alemany6, R. Arthern4, C. Bentley7, D. Blankenship8, J. Chappellaz6

High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core

Creator:: Chappellaz, J., Stowasser, C., Blunier, T., Baslev-Clausen, D., Brook, Edward J., Dallmayr, R., Fain, X., Lee, J. E., Mitchell, L. E., Pascual, O., Romanini, D., Rosen, J., and Schuepbach, S.
Abstract:: The Greenland NEEM (North Greenland Eemian Ice Drilling) operation in 2010 provided the first opportunity to combine trace-gas measurements by laser spectroscopic instruments and continuous-flow analysis along a freshly drilled ice core in a field-based setting. We present the resulting atmospheric methane (CH₄) record covering the time period from 107.7...
Resource Type:: Article
Full Text:: ice core J. Chappellaz1,** , C. Stowasser2,** , T. Blunier2, D. Baslev-Clausen2, E. J. Brook3, R

ScholarsArchive@OSU

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Isotopic constraints on the pre-industrial oceanic nitrogen budget

The stability and calibration of water vapor isotope ratio measurements during long-term deployments

The stability and calibration of water vapor isotope ratio measurements during long-term deployments

A dual isotope approach to isolate soil carbon pools of different turnover times

Selenium Supplementation Restores Innate and Humoral Immune Responses in Footrot-Affected Sheep

The Aryl Hydrocarbon Receptor Mediates Leflunomide- Induced Growth Inhibition of Melanoma Cells

A Numerical Examination of ¹⁴CO₂ Chamber Methodologies for Sampling at the Soil Surface

Where to find 1.5 million yr old ice for the IPICS “Oldest-Ice” ice core

High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core

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