Publications
Below is a list of available NOROCK peer reviewed and published science. If you are in search of a specific publication and cannot find it below or through a search, please contact twojtowicz@usgs.gov.
Filter Total Items: 1308
Does signal-free detrending increase chronology coherence in large tree-ring networks? Does signal-free detrending increase chronology coherence in large tree-ring networks?
Over the past decade, dendrochronologists have increasingly adopted the signal-free detrending (SFD) method to remove age-size trends in tree-ring measurement series, amplify the common stand-wide signal in composite chronologies, and recover medium- to low-frequency patterns that may be inadvertently removed by other detrending approaches. However, since its introduction in 2008, no...
Authors
M.Y. McPartland, Scott St. George, Gregory T. Pederson, K.J. Anchukaitis
Robotic environmental DNA bio-surveillance of freshwater health Robotic environmental DNA bio-surveillance of freshwater health
Autonomous water sampling technologies may help to overcome the human resource challenges of monitoring biological threats to rivers over long time periods and large geographic areas. The Monterey Bay Aquarium Research Institute has pioneered a robotic Environmental Sample Processor (ESP) that overcomes some of the constraints associated with traditional sampling since it can automate...
Authors
Adam J. Sepulveda, Jim M. Birch, Elliott P. Barnhart, Christopher M. Merkes, Kevan Yamahara, Roman Marin, Stacy Kinsey, Peter R. Wright, Christian Schmidt
Effects of experimental warming and nutrient enrichment on wetland communities at the Arctic’s edge Effects of experimental warming and nutrient enrichment on wetland communities at the Arctic’s edge
Global warming-related changes to freshwater ecosystems in Arctic and Subarctic regions have been magnified by nutrient input from increasing waterfowl populations. To gain insight into how these changes might affect ecosystem function, we conducted a mesocosm experiment in the Subarctic by enriching N and P (1 ×, 10 ×, and 20 × treatments) and increasing mean water temperatures ≤ 3°C...
Authors
Jon M. Davenport, LeeAnn Fishback, Blake R. Hossack
Spatial ecology and resource selection of eastern box turtles Spatial ecology and resource selection of eastern box turtles
Eastern box turtles (Terrapene carolina carolina) are widely distributed throughout the eastern United States. Although once common throughout much of its distribution, the species has experienced declines in local populations. Understanding resource selection is important for the conservation of this species; however, few data exist on resource selection for eastern box turtles in the
Authors
Katie A Harris, Joseph D. Clark, R. Dwayne Elmore, Craig A. Harper
2,200-Year tree-ring and lake-sediment based snowpack reconstruction for the northern Rocky Mountains highlights the historic magnitude of recent snow drought 2,200-Year tree-ring and lake-sediment based snowpack reconstruction for the northern Rocky Mountains highlights the historic magnitude of recent snow drought
In recent decades, Rocky Mountain accumulated snowpack levels have experienced rapid declines, yet long-term records of snowpack prior to the installation of snowpack observation stations in the early and mid 20th century are limited. To date, a small number of tree-ring based reconstructions of April 1 Snow Water Equivalent (SWE) in the northern Rocky Mountains have extended modern...
Authors
Spruce W. Schoenemann, Justin T. Martin, Gregory T. Pederson, David B. McWethy
Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians Batrachochytrium salamandrivorans (Bsal) not detected in an intensive survey of wild North American amphibians
The salamander chytrid fungus (Batrachochytrium salamandrivorans [Bsal]) is causing massive mortality of salamanders in Europe. The potential for spread via international trade into North America and the high diversity of salamanders has catalyzed concern about Bsal in the U.S. Surveillance programs for invading pathogens must initially meet challenges that include low rates of...
Authors
J. Hardin Waddle, Daniel A. Grear, Brittany Mosher, Evan H. Campbell Grant, Michael J. Adams, Adam R. Backlin, William Barichivich, Adrianne B. Brand, Gary M. Bucciarelli, Daniel L. Calhoun, Tara Chestnut, Jon M. Davenport, Andrew E. Dietrich, Robert N. Fisher, Brad Glorioso, Brian J. Halstead, Marc P Hayes, R. Ken Honeycutt, Blake R. Hossack, Patrick M. Kleeman, Julio A. Lemos-Espinal, Jeffrey M. Lorch, Robert W. Atkinson, Erin L. Muths, Christopher Pearl, Katherine Richgels, Charles W Robinson, Mark F. Roth, Jennifer Rowe, Walter Sadinski, Brent H. Sigafus, Iga Stasiak, Samuel Sweet, Susan C. Walls, Gregory J Watkins-Colwell, C. LeAnn White, Lori A Williams, Megan E. Winzeler
Comparative performance and trend of remotely sensed phenology and productivity metrics across the Western United States Comparative performance and trend of remotely sensed phenology and productivity metrics across the Western United States
Vegetation phenology and productivity play a crucial role in surface energy balance, plant and animal distribution, and animal movement and habitat use and can be measured with remote sensing metrics including start of season (SOS), peak instantaneous rate of green-up date (PIRGd), peak of season (POS), end of season (EOS), and integrated vegetation indices. However, for most metrics, we...
Authors
Tabitha A. Graves, Ethan Edward Berman, Nathaniel Mikle, Jerod Merkle, Aaron N. Johnston, Geneva W. Chong
Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression
Rapid glacier recession is altering the physical conditions of headwater streams. Stream temperatures are predicted to rise and become increasingly variable, putting entire meltwater-associated biological communities at risk of extinction. Thus, there is a pressing need to understand how thermal stress affects mountain stream insects, particularly where glaciers are likely to vanish on
Authors
Scott Hotaling, Alisha A. Shah, Kerry L. McGowan, Lusha M. Tronstad, J. Joseph Giersch, Debra S. Finn, H. Arthur Woods, Michael E. Dillon, Joanna L. Kelley
Benthic suffocation of invasive lake trout embryos by fish carcasses and sedimentation in Yellowstone Lake Benthic suffocation of invasive lake trout embryos by fish carcasses and sedimentation in Yellowstone Lake
Introduced Lake Trout Salvelinus namaycush threaten native Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in Yellowstone Lake, Yellowstone National Park, where gill nets have been used to suppress subadult and adult Lake Trout since 1995. However, survival of embryonic and larval life history stages can have profound effects on the population dynamics of Lake Trout. Inducing...
Authors
Alex S. Poole, Todd M. Koel, Nathan A. Thomas, Alexander V. Zale
Group density, disease, and season shape territory size and overlap of social carnivores Group density, disease, and season shape territory size and overlap of social carnivores
1. The spatial organization of a population can influence the spread of information, behaviour, and pathogens. Territory size and territory overlap, components of spatial organization, provide key information as these metrics may be indicators of habitat quality, resource dispersion, contact rates, and environmental risk (e.g., indirectly transmitted pathogens). Furthermore, sociality...
Authors
E. E. Brandell, Nicholas M. Fountain-Jones, Marie L. J. Gilbertson, Paul C. Cross, P. J. Hudson, Douglas W. Smith, Daniel R. Stahler, Craig Packer, Meggan E. Craft
Direct and indirect effects of fire on eastern box turtles Direct and indirect effects of fire on eastern box turtles
Prescribed fire is an increasingly important management tool for eastern deciduous forests, but relativity little is known about the direct effects of fire on the eastern box turtle (Terrapene carolina carolina). We used very high frequency (VHF) transmitters to monitor mortality, movement, and spatial ecology of 118 box turtles in response to 17 prescribed fires across 4 seasons and 3...
Authors
K. Harris, Joseph D. Clark, R. Elmore, C.A. Harper