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: 1296
Structured science syntheses to inform decision making on Federal public lands Structured science syntheses to inform decision making on Federal public lands
The U.S. Geological Survey, Bureau of Land Management, and U.S. Fish and Wildlife Service partnered to develop a new type of science product: the structured science synthesis. Structured science syntheses are peer-reviewed reports that synthesize science information about a priority resource management issue on public lands. Structured science syntheses are developed explicitly to...
Authors
Emma Dietrich, Sarah Carter, Tait Rutherford, Megan A. Gilbert, Travis Haby, Aaron Johnston, Samuel Jordan, Nathan Kleist, Richard Lehrter, Elroy Masters, Claudia Mengelt, Alexandra Stoneburner, Elisabeth Teige, John Tull, Sarah Whipple, David Wood
Trends in plant cover derived from vegetation plot data using ordinal zero-augmented beta regression Trends in plant cover derived from vegetation plot data using ordinal zero-augmented beta regression
QuestionsPlant cover values in vegetation plot data are bounded between 0 and 1, and cover is typically recorded in discrete classes with non-equal intervals. Consequently, cover data are skewed and heteroskedastic, which hampers the application of conventional regression methods. Recently developed ordinal beta regression models consider these statistical difficulties. Our primary...
Authors
Arco van Strien, Kathryn Irvine, Cas Retel
Glaciers and ice caps outside Greenland Glaciers and ice caps outside Greenland
No abstract available.
Authors
D. Burgess, G. Wolken, B. Wouters, L.M. Andreassen, Caitlyn Florentine, J. Kohler, B. Luks, F. Palsson, Louis C. Sass, L. Thomson, T. Thorsteinsson
A unified approach to long-term population monitoring of grizzly bears in the Greater Yellowstone Ecosystem A unified approach to long-term population monitoring of grizzly bears in the Greater Yellowstone Ecosystem
Long-term wildlife research and monitoring programs strive to maintain consistent data collections and analytical methods. Incorporating new techniques is important but can render data sets incongruent and limit their potential to discern trends in demographic parameters. Integrated population models (IPMs) can address these limitations by combining data sources that may span different...
Authors
Matthew Gould, Justin Clapp, Mark Haroldson, Cecily M. Costello, J. Nowak, Hans Martin, Michael Ebinger, Daniel D. Bjornlie, Daniel Thompson, Justin Dellinger, Matthew Mumma, Paul Lukacs, Frank van Manen
Observing glacier elevation changes from spaceborne optical and radar sensors – an inter-comparison experiment using ASTER and TanDEM-X data Observing glacier elevation changes from spaceborne optical and radar sensors – an inter-comparison experiment using ASTER and TanDEM-X data
Observations of glacier mass changes are key to understanding the response of glaciers to climate change and related impacts, such as regional runoff, ecosystem changes, and global sea level rise. Spaceborne optical and radar sensors make it possible to quantify glacier elevation changes, and thus multi-annual mass changes, on a regional and global scale. However, estimates from a...
Authors
Livia Piermattei, Michael Zemp, Christian Sommer, Fanny Brun, Matthias Braun, Liss Andreassen, Joaquin Belart, Etienne Berthier, Atanu Bhattacharya, Laura Boehm Vock, Tobias Bolch, Amaury Dehecq, Ines Dussaillant, Daniel Falaschi, Caitlyn Florentine, Dana Floricioiu, Christian Ginzler, Gregoire Guillet, Romain Hugonnet, Andreas Kaab, Owen King, Christoph Klug, Friedrich Knuth, Lukas Krieger, Jeff La Frenierre, Robert McNabb, Christopher McNeil, Rainer Prinz, Louis C. Sass, Thorsten Seehaus, David Shean, Desiree Treichler, Anja Wendt, Ruitang Yang
Wildland fire effects on sediment, salinity, and selenium yields in a basin underlain by Cretaceous marine shales near Rangely, Colorado Wildland fire effects on sediment, salinity, and selenium yields in a basin underlain by Cretaceous marine shales near Rangely, Colorado
Understanding and quantifying soil erosion from rangelands is a high priority for land managers, especially in areas underlain by Cretaceous Mancos Shale, which is a natural source of sediment, salinity, and selenium to surface waters in many areas of western Colorado and eastern Utah. The purpose of this report is to present the results of a U.S. Geological Survey study that assessed...
Authors
Natalie Day, Todd Preston, Patrick Longley
Clustering and unconstrained ordination with Dirichlet process mixture models Clustering and unconstrained ordination with Dirichlet process mixture models
Assessment of similarity in species composition or abundance across sampled locations is a common goal in multi-species monitoring programs. Existing ordination techniques provide a framework for clustering sample locations based on species composition by projecting high-dimensional community data into a low-dimensional, latent ecological gradient representing species composition...
Authors
Christian Stratton, Andrew Hoegh, Thomas Rodhouse, Jennifer L. Green, Katharine M. Banner, Kathryn Irvine
Incorporating projected climate conditions to map future riparian refugia Incorporating projected climate conditions to map future riparian refugia
Identifying areas expected to remain buffered from climate change and maintain biodiversity and ecological function (i.e., climate refugia) is important for climate adaptation planning. As structurally diverse transitional zones between terrestrial and aquatic environments, riparian areas are often biological hotspots and provide critical corridors for species movement, particularly in...
Authors
Kimberly Szcodronski, Alisa A. Wade, Sarah Burton, Blake R. Hossack
Infection–nutrition feedbacks: Fat supports pathogen clearance but pathogens reduce fat in a wild mammal Infection–nutrition feedbacks: Fat supports pathogen clearance but pathogens reduce fat in a wild mammal
Though far less obvious than direct effects (clinical disease or mortality), the indirect influences of pathogens are difficult to estimate but may hold fitness consequences. Here, we disentangle the directional relationships between infection and energetic reserves, evaluating the hypotheses that energetic reserves influence infection status of the host and that infection elicits costs...
Authors
Rachel Smiley, Brittany Wagler, William H. Edwards, Jessica Jennings-Gaines, Katie Luukkonen, Kara Robbins, Marguerite Johnson, Alyson Courtemanch, Tony W. Mong, Daryl Lutz, Douglas McWhirter, Jennifer Malmberg, Blake Lowrey, Kevin L. Monteith
Integrating ecological value and charismatic species habitats to prioritize habitats for conservation: A case study from Greater Yellowstone Integrating ecological value and charismatic species habitats to prioritize habitats for conservation: A case study from Greater Yellowstone
Expanding human pressure has reduced natural habitats globally and motivated strategies to conserve remaining natural habitats. Decisions about conservation on private lands, however, are typically made by local stakeholders who are motivated by the elements of nature they most highly value. Thus, national prioritization for conservation should be complemented by local analysis of...
Authors
A. Hansena, A. Easta, Z. Ashford, C. Crittendena, O. Jakabosky, D. Quinby, Shannon K. Brewer, Frank van Manen, Mark Haroldson, A. Middleton, N. Robinson, D. Theobald
Climate change vulnerability of Arctic char across Scandinavia Climate change vulnerability of Arctic char across Scandinavia
Climate change is anticipated to cause species to shift their ranges upward and poleward, yet space for tracking suitable habitat conditions may be limited for range-restricted species at the highest elevations and latitudes of the globe. Consequently, range-restricted species inhabiting Arctic freshwater ecosystems, where global warming is most pronounced, face the challenge of coping...
Authors
Clint Muhlfeld, Timothy Cline, Anders Finstad, Dag Hessen, Sam Perrin, Jens Thaulow, Diane Whited, Leif Vollestad
Effects of harmful algal blooms on amphibians and reptiles are under-reported and under-represented Effects of harmful algal blooms on amphibians and reptiles are under-reported and under-represented
Harmful algal blooms (HABs) are a persistent and increasing problem globally, yet we still have limited knowledge about how they affect wildlife. Although semi-aquatic and aquatic amphibians and reptiles have experienced large declines and occupy environments where HABs are increasingly problematic, their vulnerability to HABs remains unclear. To inform monitoring, management, and future...
Authors
Brian J. Halstead, Kelly Smalling, Blake R. Hossack