Publications
Filter Total Items: 2066
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 C. Evers, Collin A. Eagles-Smith, Joshua T. Ackerman, James J. Willacker, John E. Elliott, Jesse M. Lepak, Stacy S. Vander Pol, Colleen E. Bryan
Nitrogen enrichment regulates calcium sources in forests Nitrogen enrichment regulates calcium sources in forests
Nitrogen (N) is a key nutrient that shapes cycles of other essential elements in forests, including calcium (Ca). When N availability exceeds ecosystem demands, excess N can stimulate Ca leaching and deplete Ca from soils. Over the long term, these processes may alter the proportion of available Ca that is derived from atmospheric deposition vs. bedrock weathering, which has fundamental
Authors
Justin D. Hynicka, Julie C. Pett-Ridge, Steven Perakis
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 A. Eagles-Smith, James G. Wiener, Chris S. Eckley, James J. Willacker, David C. Evers, Mark C. Marvin-DiPasquale, Daniel Obrist, Jacob Fleck, George R. Aiken, Jesse M. Lepak, Allyson K. Jackson, Jackson Webster, A. Robin Stewart, Jay Davis, Charles N. Alpers, Joshua T. Ackerman
Aquatic biodiversity in forests: A weak link in ecosystem services resilience Aquatic biodiversity in forests: A weak link in ecosystem services resilience
The diversity of aquatic ecosystems is being quickly reduced on many continents, warranting a closer examination of the consequences for ecological integrity and ecosystem services. Here we describe intermediate and final ecosystem services derived from aquatic biodiversity in forests. We include a summary of the factors framing the assembly of aquatic biodiversity in forests in natural...
Authors
Brooke E. Penaluna, Deanna H. Olson, Rebecca L. Flitcroft, Matthew A. Weber, J. Ryan Bellmore, Steven M. Wondzell, Jason B. Dunham, Sherri L. Johnson, Gordon H. Reeves
Herpetological monitoring and assessment on the Trinity River, Trinity County, California—Final report Herpetological monitoring and assessment on the Trinity River, Trinity County, California—Final report
The primary goal of the Trinity River Restoration Program is to rehabilitate the fisheries on the dam-controlled Trinity River. However, maintaining and enhancing other wildlife populations through the restoration initiative is also a key objective. Foothill yellow-legged frogs (Rana boylii) and western pond turtles (Actinemys marmorata) have been identified as important herpetological...
Authors
Melissa L. Snover, M. J. Adams
Salmon redd identification using environmental DNA (eDNA) Salmon redd identification using environmental DNA (eDNA)
Introduction The purpose of this project was to develop a technique to use environmental DNA (eDNA) to distinguish between redds made by Chinook salmon (Oncorhynchus tshawytscha) and redds made by Coho salmon (O. kisutch) and to distinguish utilized redds from test/abandoned redds or scours that have the appearance of redds. The project had two phases: Phase 1. Develop, test, and...
Authors
David S. Pilliod, Matthew B. Laramie
Conservation of native Pacific trout diversity in western North America Conservation of native Pacific trout diversity in western North America
Pacific trout Oncorhynchus spp. in western North America are strongly valued in ecological, socioeconomic, and cultural views, and have been the subject of substantial research and conservation efforts. Despite this, the understanding of their evolutionary histories, overall diversity, and challenges to their conservation is incomplete. We review the state of knowledge on these important...
Authors
Brooke E. Penaluna, Alicia Abadia-Cardoso, Jason B. Dunham, Francisco J Garcia de Leon, Robert E. Gresswell, Arturo Ruiz Luna, Eric B. Taylor, Bradley B. Shepard, Robert K. Al-Chokhachy, Clint C. Muhlfeld, Kevin R. Bestgen, Kevin H. Rogers, Marco A Escalante, Ernest R. Keeley, Gabriel Temple, Jack E. Williams, Kathleen Matthews, Ron Pierce, Richard L. Mayden, Ryan Kovach, John Carlos Garza, Kurt D. Fausch
Combined use of isotopic and hydrometric data to conceptualize ecohydrological processes in a high-elevation tropical ecosystem Combined use of isotopic and hydrometric data to conceptualize ecohydrological processes in a high-elevation tropical ecosystem
Few high-elevation tropical catchments worldwide are gauged and even fewer are studied using combined hydrometric and isotopic data. Consequently, we lack information needed to understand processes governing rainfall-runoff dynamics and to predict their influence on downstream ecosystem functioning. To address this need, we present a combination of hydrometric and water stable isotopic
Authors
Giovanny M Mosquera, Rolando Celleri, Patricio X Lazo, Kellie B Vache, Steven Perakis, Patricio Crespo
Larval long-toed salamanders incur nonconsumptive effects in the presence of nonnative trout Larval long-toed salamanders incur nonconsumptive effects in the presence of nonnative trout
Predators can influence prey directly through consumption or indirectly through nonconsumptive effects (NCEs) by altering prey behavior, morphology, and life history. We investigated whether predator-avoidance behaviors by larval long-toed salamanders (Ambystoma macrodactylum) in lakes with nonnative trout result in NCEs on morphology and development. Field studies in lakes with and...
Authors
Erin K. Kenison, Andrea R. Litt, David S. Pilliod, Thomas E. McMahon
Mortality monitoring design for utility-scale solar power facilities Mortality monitoring design for utility-scale solar power facilities
Introduction Solar power represents an important and rapidly expanding component of the renewable energy portfolio of the United States (Lovich and Ennen, 2011; Hernandez and others, 2014). Understanding the impacts of renewable energy development on wildlife is a priority for the U.S. Fish and Wildlife Service (FWS) in compliance with Department of Interior Order No. 3285 (U.S...
Authors
Manuela M. Huso, Thomas Dietsch, Chris Nicolai
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 A. W. Miller, Benedikt R. Schmidt, M. J. Adams, Staci M. Amburgey, Thierry A. Chambert, Sam S. Cruickshank, Robert N. Fisher, David M. Green, Blake R. Hossack, Pieter T.J. Johnson, Maxwell B. Joseph, Tracy A. G. Rittenhouse, Maureen E. Ryan, J. Hardin Waddle, Susan C. Walls, Larissa L. Bailey, Gary M. Fellers, Thomas A. Gorman, Andrew M. Ray, David S. Pilliod, Steven J. Price, Daniel Saenz, Walt Sadinski, Erin L. Muths
Dendritic network models: Improving isoscapes and quantifying influence of landscape and in-stream processes on strontium isotopes in rivers Dendritic network models: Improving isoscapes and quantifying influence of landscape and in-stream processes on strontium isotopes in rivers
A critical challenge for the Earth sciences is to trace the transport and flux of matter within and among aquatic, terrestrial, and atmospheric systems. Robust descriptions of isotopic patterns across space and time, called “isoscapes,” form the basis of a rapidly growing and wide-ranging body of research aimed at quantifying connectivity within and among Earth's systems. However...
Authors
Sean R. Brennan, Christian E. Torgersen, Jeff P. Hollenbeck, Diego P. Fernandez, Carrie K Jensen, Daniel E. Schindler