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ScholarsArchive at Oregon State University
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Spring Chinook Salmon Oncorhynchus tshawytscha are transported above dams in the Willamette River to provide access to blocked spawning habitat. However, 30–95% of these transplants may die before spawning in some years. To varying degrees, salmon...
2015 (iso8601)
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Ontogenetic changes in resource use often delimit transitions between life stages. Ecological and individual factors can cause variation in the timing and consistency of these transitions, ultimately affecting community and population dynamics...
2015-11 (iso8601)
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Following a four-year period of writing, member comment, and multiple revisions, the AFS Position Paper and Policy on Mining and Fossil Fuel Extraction was approved unanimously by the membership at the Society's annual business meeting August 19,...
2016-01-02 (iso8601)
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Population viability analyses provide a quantitative approach that seeks to predict the possible future status of a species of interest under different scenarios and, therefore, can be important components of large-scale species’ conservation...
2016-01-24 (iso8601)
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The use of midazolam as a tranquilizer
for anesthesia in mustelids in conjunction
with the cyclohexamine ketamine is not
well documented. Because midazolam is fast
acting, inexpensive, and quickly metabolized, it
may serve as a good alternative to...
2015-01 (iso8601)
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This report summarizes the activities of the Fish Commission of Oregon from July 1966 to June 1968. It contains information on the different divisions of the Commission, and summarizes research projects the Research Division was working on. It...
1969 (iso8601)
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Reconstructions of the El Niño–Southern Oscillation (ENSO) are often created using the oxygen isotopic ratio in tropical coral skeletons (δ¹⁸O). However, coral δ¹⁸O can be difficult to interpret quantitatively, as it reflects changes in both...
2015-11 (iso8601)
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Marine sediments from the North Pacific document two episodes of expansion and strengthening of the subsurface oxygen minimum zone (OMZ) accompanied by seafloor hypoxia during the last deglacial transition. The mechanisms driving this hypoxia...
2015-11-19 (iso8601)
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Glacial periods exhibit abrupt Dansgaard-Oeschger (DO) climatic oscillations that are thought to be linked to instabilities in the Atlantic meridional overturning circulation (AMOC). Great uncertainty remains regarding the dynamics of the DO...
2015-12 (iso8601)
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Understanding the frequency, magnitude, and nature of explosive volcanic eruptions is essential for hazard planning and risk mitigation. Terrestrial stratigraphic tephra records can be patchy and incomplete due to subsequent erosion and burial...
2015-12 (iso8601)
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Laser-based spectroscopic techniques, such as cavity ring-down spectroscopy (CRDS), provide a new, cost effective and more widely available approach to measure the oxygen isotope ratio in water molecules, H₂¹⁸O/H₂¹⁶O (δ¹⁸O), and are used...
2016-01 (iso8601)
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A detailed analysis of the Version 1.1 Hadley Centre Sea Ice and Sea Surface Temperature (HadISST1.1) dataset has identified numerous problems, some of which limit the utility of the dataset for certain scientific applications. The issues...
2016-02-29 (iso8601)
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The influence of varying horizontal and vertical stratification in the upper layer ( inline image m) associated with riverine waters and seasonal atmospheric fluxes on coastal near-inertial currents is investigated with remotely sensed and in situ...
2015-12 (iso8601)
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Two simplified ocean simulations are used to study circulation and transport within Nares Strait. The simulations are similar, except that one included a coupled sea ice model that effectively established a landfast ice cover throughout the...
2015-12 (iso8601)
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Studies of active fault zones have flourished with the availability of high-resolution topographic data, particularly where airborne light detection and ranging (lidar) and structure from motion (SfM) data sets provide a means to remotely analyze...
2015-12 (iso8601)
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We form a new ‘blended’ data set of sea level anomaly (SLA) fields by combining gridded daily fields derived from altimeter data with coastal tide gauge data. Within approximately 55–70 km of the coast, the altimeter data are discarded and...
2016-03-01 (iso8601)
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A coupled biophysical model is used to examine the impact of changes in sea ice and snow cover and nutrient availability on the formation of massive under-ice phytoplankton blooms (MUPBs) in the Chukchi Sea of the Arctic Ocean over the period...
2015-08 (iso8601)
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Polycentric networks of formal organizations and informal stakeholder groups, as opposed to centralized institutional hierarchies, can be critically important for strengthening the capacity of governance systems to adapt to unexpected social and...
2016-03 (iso8601)
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In 2014, the California Current (~28˚–48˚N) saw
average, or below average, coastal upwelling and relatively
low productivity in most locations, except from
38˚–43˚N during June and July. Chlorophyll-a levels
were low throughout spring and summer...
2015 (iso8601)
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