Distributed deformation in the backarc of Cascadia is complex. Off the west
coast lies the Cascadia convergent margin. East of the plate boundary,
clockwise rotation of the Oregon Coast Range block with respect to stable
North America influences backarc deformation, causing extensional faults in
southeast Oregon, contraction folding in southeast...
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THESIS OF
Ajeet K Johnson for the degree of Master of Science in Geology presented on
January 18
Biodiversity continues to decline in the face of increasing anthropogenic pressures such as habitat destruction, exploitation, pollution and introduction of alien species. Existing global databases of species’ threat status or population time series are dominated by charismatic species. The collation of datasets with broad taxonomic and biogeographic extents, and that...
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responds to human impacts
Lawrence N. Hudson1*, Tim Newbold2,3*, Sara Contu1, Samantha L. L. Hill1,2, Igor
Worldwide, lack of data on stream temperature has motivated the use of regression-based
statistical models to predict stream temperatures based on more widely available data on air
temperatures. Such models have been widely applied to project responses of stream temperatures
under climate change, but the performance of these models has...
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change on
stream temperature?
Arismendi, I., Safeeq, M., Dunham, J. B., & Johnson, S. L. (2014). Can
Opinions about public lands and the actions of private non-industrial forest owners in the
western United States play important roles in forested landscape management as both public
and private forests face increasing risks from large wildfires, pests and disease. This
work presents the responses from two surveys, a random-sample telephone...
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Hartter1,2*, Forrest R. Stevens3, Lawrence C. Hamilton2,4, Russell G. Congalton5,
Mark J. Ducey2,5, Paul T
The stability and value of transgenic pest resistance for promoting tree growth are poorly understood. These data are
essential for determining if such trees could be beneficial to commercial growers in the face of substantial regulatory and
marketing costs. We investigated growth and insect resistance in hybrid poplar expressing the...
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. Klocko, Richard Meilan, Rosalind R. James, Venkatesh Viswanath, Cathleen Ma, Peggy Payne,
Lawrence Miller
We conducted a detailed investigation of U isotopes in conjunction with a broad geochemical investigation during field-scale biostimulation and desorption experiments. This investigation was carried out in the uranium-contaminated alluvial aquifer of the Rifle field research site. In this well-characterized setting, a more comprehensive understanding of U isotope geochemistry is...
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: Insights from high-temporal resolution
238U/235U data
A.E. Shiel a,⇑, T.M. Johnson b, C.C. Lundstrom b
Sea star wasting disease (SSWD) first appeared in Oregon in April 2014, and by June had spread to most of the coast. Although delayed compared to areas to the north and south, SSWD was initially most intense in north and central Oregon and spread southward. Up to 90% of individuals...
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, Angela Johnson¤, Jenna Sullivan,
Sarah Gravem, Francis Chan
Department of Integrative Biology, Oregon
Four decades after the passage of the US Clean Air Act, air-quality standards are set to protect ecosystems from damage caused by gas-phase nitrogen (N) and sulfur (S) compounds, but not from the deposition of these air pollutants to land and water. Here, we synthesize recent scientific literature on the...
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hydrologic flowpath (Lawrence et al.
1999; Sullivan et al. 2007b).
Acidity develops naturally in soil, but
We present the WD2014 chronology for the upper
part (0–2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet
(WAIS) Divide (WD) ice core. The chronology is based on
counting of annual layers observed in the chemical, dust
and electrical conductivity records. These layers are caused
by seasonal changes...
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, Lawrence Layman1, Olivia J. Maselli1, Kenneth McGwire1, Raimund Muscheler8,
Kunihiko Nishiizumi6, Daniel R