Publications
Filter Total Items: 234
Dam Removal Information Portal (DRIP)—A map-based resource linking scientific studies and associated geospatial information about dam removals Dam Removal Information Portal (DRIP)—A map-based resource linking scientific studies and associated geospatial information about dam removals
The removal of dams has recently increased over historical levels due to aging infrastructure, changing societal needs, and modern safety standards rendering some dams obsolete. Where possibilities for river restoration, or improved safety, exceed the benefits of retaining a dam, removal is more often being considered as a viable option. Yet, as this is a relatively new development in...
Authors
Jeffrey Duda, Daniel J. Wieferich, R. Bristol, J. Bellmore, Vivian Hutchison, Katherine Vittum, Laura Craig, Jonathan A. Warrick
Assessing potential health risks to fish and humans using mercury concentrations in inland fish from across western Canada and the United States Assessing potential health risks to fish and humans using mercury concentrations in inland fish from across western Canada and the United States
Fish represent high quality protein and nutrient sources, but Hg contamination is ubiquitous in aquatic ecosystems and can pose health risks to fish and their consumers. Potential health risks posed to fish and humans by Hg contamination in fish were assessed in western Canada and the United States. A large compilation of inland fish Hg concentrations was evaluated in terms of potential...
Authors
Jesse Lepak, Mevin Hooten, Collin Eagles-Smith, Michael T. Tate, Michelle A. Lutz, Joshua T. Ackerman, James Willacker, Allyson Jackson, David Evers, James Wiener, Colleen Pritz, Jay Davis
Spatiotemporal patterns of mercury accumulation in lake sediments of western North America Spatiotemporal patterns of mercury accumulation in lake sediments of western North America
For the Western North America Mercury Synthesis, we compiled mercury records from 165 dated sediment cores from 138 natural lakes across western North America. Lake sediments are accepted as faithful recorders of historical mercury accumulation rates, and regional and sub-regional temporal and spatial trends were analyzed with descriptive and inferential statistics. Mercury accumulation...
Authors
Paul Drevnick, Colin Cooke, Daniella Barraza, Jules M. Blais, Kenneth Coale, Brian Cumming, Chris Curtis, Biplob Das, William Donahue, Collin Eagles-Smith, Daniel Engstrom, William F. Fitzgerald, Chad Furl, John Gray, Roland Hall, Togwell Jackson, Kathleen Laird, W. Lockhart, Robie Macdonald, M. Mast, Callie Mathieu, Derek Muir, Peter Outridge, Scott Reinemann, Sarah Rothenberg, Ana Ruiz-Fernandex, Louis, Rhea Sanders, Hamed Sanei, Elliott Skierszkan, Peter C. Van Metre, Timothy Veverica, Johan Wiklund, Brent Wolfe
Mercury risk to avian piscivores across western United States and Canada Mercury risk to avian piscivores across western United States and Canada
The widespread distribution of mercury (Hg) threatens wildlife health, particularly piscivorous birds. Western North America is a diverse region that provides critical habitat to many piscivorous bird species, and also has a well-documented history of mercury contamination from legacy mining and atmospheric deposition. The diversity of landscapes in the west limits the distribution of...
Authors
Allyson K. Jackson, David Evers, Collin Eagles-Smith, Joshua T. Ackerman, James Willacker, John E. Elliott, Jesse Lepak, Stacy Vander Pol, Colleen Bryan
The potential uses of operational earthquake forecasting The potential uses of operational earthquake forecasting
This article reports on a workshop held to explore the potential uses of operational earthquake forecasting (OEF). We discuss the current status of OEF in the United States and elsewhere, the types of products that could be generated, the various potential users and uses of OEF, and the need for carefully crafted communication protocols. Although operationalization challenges remain...
Authors
Edward H. Field, Thomas Jordan, Lucille Jones, Andrew Michael, Michael L. Blanpied
Mercury in western North America: A synthesis of environmental contamination, fluxes, bioaccumulation, and risk to fish and wildlife Mercury in western North America: A synthesis of environmental contamination, fluxes, bioaccumulation, and risk to fish and wildlife
Western North America is a region defined by extreme gradients in geomorphology and climate, which support a diverse array of ecological communities and natural resources. The region also has extreme gradients in mercury (Hg) contamination due to a broad distribution of inorganic Hg sources. These diverse Hg sources and a varied landscape create a unique and complex mosaic of ecological...
Authors
Collin Eagles-Smith, James Wiener, Chris Eckley, James Willacker, David Evers, Mark Marvin-DiPasquale, Daniel Obrist, Jacob Fleck, George Aiken, Jesse Lepak, Allyson K. Jackson, Jackson Webster, A. Stewart, Jay Davis, Charles Alpers, Joshua T. Ackerman
Body size distributions signal a regime shift in a lake ecosystem Body size distributions signal a regime shift in a lake ecosystem
Communities of organisms, from mammals to microorganisms, have discontinuous distributions of body size. This pattern of size structuring is a conservative trait of community organization and is a product of processes that occur at multiple spatial and temporal scales. In this study, we assessed whether body size patterns serve as an indicator of a threshold between alternative regimes...
Authors
Trisha Spanbauer, Craig Allen, David G. Angeler, Tarsha Eason, Sherilyn Fritz, Ahjond Garmestani, Kirsty Nash, Jeffery R. Stone, Craig A. Stow, Shana Sundstrom
Quantitative evidence for the effects of multiple drivers on continental-scale amphibian declines Quantitative evidence for the effects of multiple drivers on continental-scale amphibian declines
Since amphibian declines were first proposed as a global phenomenon over a quarter century ago, the conservation community has made little progress in halting or reversing these trends. The early search for a “smoking gun” was replaced with the expectation that declines are caused by multiple drivers. While field observations and experiments have identified factors leading to increased...
Authors
Evan H. Campbell Grant, David Miller, Benedikt Schmidt, M. Adams, Staci Amburgey, Thierry Chambert, Sam Cruickshank, Robert Fisher, David Green, Blake Hossack, Pieter Johnson, Maxwell Joseph, Tracy A. G. Rittenhouse, Maureen E. Ryan, J. Waddle, Susan Walls, Larissa L. Bailey, Gary Fellers, Thomas Gorman, Andrew Ray, David S. Pilliod, Steven Price, Daniel Saenz, Walt Sadinski, Erin Muths
Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada Spatial and temporal patterns of mercury concentrations in freshwater fish across the Western United States and Canada
Methylmercury contamination of fish is a global threat to environmental health. Mercury (Hg) monitoring programs are valuable for generating data that can be compiled for spatially broad syntheses to identify emergent ecosystem properties that influence fish Hg bioaccumulation. Fish total Hg (THg) concentrations were evaluated across the Western United States (US) and Canada, a region...
Authors
Collin Eagles-Smith, Joshua T. Ackerman, James Willacker, Michael T. Tate, Michelle Lutz, Jacob Fleck, A. Stewart, James Wiener, David Evers, Jesse Lepak, Jay A. Davis, Colleen Pritz
Avian mercury exposure and toxicological risk across western North America: A synthesis Avian mercury exposure and toxicological risk across western North America: A synthesis
Methylmercury contamination of the environment is an important issue globally, and birds are useful bioindicators for mercury monitoring programs. The available data on mercury contamination of birds in western North America were synthesized. Original data from multiple databases were obtained and a literature review was conducted to obtain additional mercury concentrations. In total...
Authors
Joshua T. Ackerman, Collin Eagles-Smith, Mark Herzog, C. Hartman, Sarah Peterson, David Evers, Allyson K. Jackson, John E. Elliott, Stacy Vander Pol, Colleen Bryan
Hg concentrations in fish from coastal waters of California and Western North America Hg concentrations in fish from coastal waters of California and Western North America
The State of California conducted an extensive and systematic survey of mercury (Hg) in fish from the California coast in 2009 and 2010. The California survey sampled 3483 fish representing 46 species at 68 locations, and demonstrated that methylHg in fish presents a widespread exposure risk to fish consumers. Most of the locations sampled (37 of 68) had a species with an average...
Authors
Jay Davis, John Ross, Shira Bezalel, Lawrence Sim, Autumn Bonnema, Gary Ichikawa, Wes Heim, Kenneth C Schiff, Collin Eagles-Smith, Joshua T. Ackerman
Conditional vulnerability of plant diversity to atmospheric nitrogen deposition across the United States Conditional vulnerability of plant diversity to atmospheric nitrogen deposition across the United States
Atmospheric nitrogen (N) deposition has been shown to decrease plant species richness along regional deposition gradients in Europe and in experimental manipulations. However, the general response of species richness to N deposition across different vegetation types, soil conditions, and climates remains largely unknown even though responses may be contingent on these environmental...
Authors
Samuel Simkin, Edith Allen, William D. Bowman, Christopher L. Clark, Jayne Belnap, Matthew Brooks, Brian Cade, Scott L. Collins, Linda Geiser, Frank Gilliam, Sarah Jovan, Linda Pardo, Bethany Schulz, Carly Stevens, Katharine Suding, Heather Throop, Donald Waller