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Increasing synchrony of high temperature and low flow in western North American streams: double trouble for coldwater biota?

Creator:: Arismendi, Ivan, Safeeq, Mohammad, Johnson, Sherri L., Dunham, Jason B., and Haggerty, Roy
Abstract:: Flow and temperature are strongly linked environmental factors driving ecosystem processes in streams. Stream temperature maxima (T [subscript max_w]) and stream flow minima (Q[subscript min]) can create periods of stress for aquatic organisms. In mountainous areas, such as western North America, recent shifts toward an earlier spring peak flow and...
Resource Type:: Article
Full Text:: Arismendi • Mohammad Safeeq • Sherri L. Johnson • Jason B. Dunham • Roy Haggerty Received: 2 May 2012

Fall Creek Reservoir Water Quality Dataset

Creator:: Hamilton, Stephen K., Murphy, Christina A., Johnson, Sherri L., and Pollock, Amanda M.M.
Abstract:: Water chemistry measurements taken at or downstream of Fall Creek Reservoir, OR (43.9459714, -122.755765). Fall Creek is a tributary of the Middle Fork Willamette River, located approximately 20 miles SE of Eugene, Oregon, USA. Water chemistry measurements included water samples collected from the reservoir outflow (during autumn drawdown) and within...
Resource Type:: Dataset

Zooplankton in Upper Willamette Reservoirs, 2015

Creator:: Murphy, Christina A., Pollock, Amanda M.M., Strecker, Angela L., and Johnson, Sherri L.
Abstract:: Samples targeting crustacean zooplankton were collected from 3 upper Willamette Basin reservoirs during May-August 2015. Van Dorn sampling devices were used to collect samples at discrete depths from Fall Creek Reservoir, Lookout Point Reservoir, and Hills Creek Reservoir. Zooplankton samples were collected during daytime and nighttime corresponding with the new...
Resource Type:: Dataset

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Creator:: Sobota, Daniel J., Johnson, Sherri L., Gregory, Stan V., and Ashkenas, Linda R.
Abstract:: The influence of land use on potential fates of nitrate (NO3-) in stream ecosystems, ranging from denitrification to storage in organic matter, has not been documented extensively. Here, we describe the Pacific Northwest component of Lotic Intersite Nitrogen eXperiment, phase II (LINX II) to examine how land-use setting influences fates...
Resource Type:: Article
Full Text:: Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams Daniel J. Sobota,1* Sherri L

Descriptors of natural thermal regimes in streams and their responsiveness to change in the Pacific Northwest of North America

Creator:: Arismendi, Ivan, Johnson, Sherri L., Dunham, Jason B., and Haggerty, Roy
Abstract:: 1. Temperature is a major driver of ecological processes in stream ecosystems, yet the dynamics of thermal regimes remain poorly described. Most work has focused on relatively simple descriptors that fail to capture the full range of conditions that characterise thermal regimes of streams across seasons or throughout the year....
Resource Type:: Article
Full Text:: their responsiveness to change in the Pacific Northwest of North America IVAN ARISMENDI* , SHERRI L

Phytoplankton in Upper Willamette Reservoirs Dataset

Creator:: Murphy, Christina A., Pollock, Amanda M. M., Arismendi, Ivan, and Johnson, Sherri L.
Abstract:: Phytoplankton samples were collected from 5 upper Willamette Basin reservoirs in variable months during years 2013-2016 and 2019. Samples were collected from Blue River Reservoir, Cougar Reservoir, Fall Creek Reservoir, Lookout Point Reservoir, and Hills Creek Reservoir. The phytoplankton were identified and enumerated by Jim Sweet at Aquatic Analysts. Density...
Resource Type:: Dataset

Can air temperature be used to project influences of climate change on stream temperature?

Creator:: Arismendi, Ivan, Safeeq, Mohammad, Dunham, Jason B., and Johnson, Sherri L.
Abstract:: 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...
Resource Type:: Article

The role of the geophysical template and environmental regimes in controlling stream-living trout populations

Creator:: Penaluna, Brooke E., Railsback, Steve F., Dunham, Jason B., Johnson, Sherri, Bilby, Robert E., and Skaugset, Arne E.
Abstract:: The importance of multiple processes and instream factors to aquatic biota has been explored extensively, but questions remain about how local spatiotemporal variability of aquatic biota is tied to environmental regimes and the geophysical template of streams. We used an individual-based trout model to explore the relative role of the...
Resource Type:: Article
Full Text:: Brooke E. Penaluna, Steve F. Railsback, Jason B. Dunham, Sherri Johnson, Robert E. Bilby, and Arne E

Local Variability Mediates Vulnerability of Trout Populations to Land Use and Climate Change

Creator:: Penaluna, Brooke E., Dunham, Jason B., Railsback, Steve F., Arismendi, Ivan, Johnson, Sherri L., Bilby, Robert E., Safeeq, Mohammad, and Skaugset, Arne E.
Abstract:: Land use and climate change occur simultaneously around the globe. Fully understanding their separate and combined effects requires a mechanistic understanding at the local scale where their effects are ultimately realized. Here we applied an individual-based model of fish population dynamics to evaluate the role of local stream variability in...
Resource Type:: Article
Full Text:: Arismendi2, Sherri L. Johnson1, Robert E. Bilby5, Mohammad Safeeq6, Arne E. Skaugset7 1 Pacific Northwest

The paradox of cooling streams in a warming world:Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States

Creator:: Arismendi, Ivan, Johnson, Sherri L., Dunham, Jason B., Haggerty, Roy, and Hockman-Wert, David
Abstract:: Temperature is a fundamentally important driver of ecosystem processes in streams. Recent warming of terrestrial climates around the globe has motivated concern about consequent increases in stream temperature. More specifically, observed trends of increasing air temperature and declining stream flow are widely believed to result in corresponding increases in stream...
Resource Type:: Article
Full Text:: Sherri L. Johnson,2 Jason B. Dunham,3 Roy Haggerty,1 and David Hockman-Wert3 Received 20 February 2012

ScholarsArchive@OSU

Increasing synchrony of high temperature and low flow in western North American streams: double trouble for coldwater biota?

Fall Creek Reservoir Water Quality Dataset

Zooplankton in Upper Willamette Reservoirs, 2015

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Descriptors of natural thermal regimes in streams and their responsiveness to change in the Pacific Northwest of North America

Phytoplankton in Upper Willamette Reservoirs Dataset

Can air temperature be used to project influences of climate change on stream temperature?

The role of the geophysical template and environmental regimes in controlling stream-living trout populations

Local Variability Mediates Vulnerability of Trout Populations to Land Use and Climate Change

The paradox of cooling streams in a warming world:Regional climate trends do not parallel variable local trends in stream temperature in the Pacific continental United States

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