Publications
Filter Total Items: 1991
Intercontinental genetic structure and gene flow in Dunlin (Calidris alpina), a potential vector of avian influenza
Waterfowl (Anseriformes) and shorebirds (Charadriiformes) are the most common wild vectors of influenza A viruses. Due to their migratory behavior, some may transmit disease over long distances. Migratory connectivity studies can link breeding and nonbreeding grounds while illustrating potential interactions among populations that may spread diseases. We investigated Dunlin (Calidris alpina), a sh
Authors
Mark P. Miller, Susan M. Haig, Thomas D. Mullins, Luzhang Ruan, Bruce Casler, Alexei Dondua, H. River Gates, J. Matthew Johnson, Steven J. Kendall, Pavel S. Tomkovich, Diane Tracy, Olga P. Valchuk, Richard B. Lanctot
Mortality estimation from carcass searches using the R-package carcass: a tutorial
This article is a tutorial for the R-package carcass. It starts with a short overview of common methods used to estimate mortality based on carcass searches. Then, it guides step by step through a simple example. First, the proportion of animals that fall into the search area is estimated. Second, carcass persistence time is estimated based on experimental data. Third, searcher efficiency is estim
Authors
Fränzi Korner-Nievergelt, Oliver Behr, Robert Brinkmann, Matthew A. Etterson, Manuela M. P. Huso, Daniel Dalthorp, Pius Korner-Nievergelt, Tobias Roth, Ivo Niermann
Elk monitoring in Mount Rainier and Olympic national parks: 2008-2011 synthesis report
In 2008, the USGS collaborated with the NPS, the Muckleshoot and Puyallup Indian Tribes, and WDFW to develop a protocol tor monitor changes in abundance, population composition, and spatial distribution of elk on summer ranges in MORA and OLYM and winter ranges in OLYM. We developed double-observer sightability (DO-S) models that adjusted raw counts of elk as a function of factors influencing dete
Authors
Kurt J. Jenkins, Paul C. Griffin, Patricia J. Happe, Mason E. Reid, David J. Vales, Barbara J. Moeller, Michelle Tirhe, Scott McCorquodale, Katherine Beirne, John Boetsch, William Baccus, Bruce C. Lubow
Plant diversity predicts beta but not alpha diversity of soil microbes across grasslands worldwide
Aboveground–belowground interactions exert critical controls on the composition and function of terrestrial ecosystems, yet the fundamental relationships between plant diversity and soil microbial diversity remain elusive. Theory predicts predominantly positive associations but tests within single sites have shown variable relationships, and associations between plant and microbial diversity acros
Authors
Suzanne M. Prober, Jonathan W. Leff, Scott T. Bates, Elizabeth T. Borer, Jennifer Firn, W. Stanley Harpole, Eric M. Lind, Eric W. Seabloom, Peter B. Adler, Jonathan D. Bakker, Elsa E. Cleland, Nicole DeCrappeo, Elizabeth DeLorenze, Nicole Hagenah, Yann Hautier, Kirsten S. Hofmockel, Kevin P. Kirkman, Johannes M. H. Knops, Kimberly J. La Pierre, Andrew S. MacDougall, Rebecca L. McCulley, Charles E. Mitchell, Anita C. Risch, Martin Schuetz, Carly J. Stevens, Ryan J. Williams, Noah Fierer
Activity-specific ecological niche models for planning reintroductions of California condors (Gymnogyps californianus)
Ecological niche models can be a useful tool to identify candidate reintroduction sites for endangered species but have been infrequently used for this purpose. In this paper, we (1) develop activity-specific ecological niche models (nesting, roosting, and feeding) for the critically endangered California condor (Gymnogyps californianus) to aid in reintroduction planning in California, Oregon, and
Authors
Jesse D'Elia, Susan M. Haig, Matthew J. Johnson, Bruce G. Marcot, Richard Young
Management of aspen in a changing environment
Aspen communities are biologically rich and ecologically valuable, yet they face myriad threats, including changing climate, altered fire regimes, and excessive browsing by domestic and wild ungulates. Recognizing the different types of aspen communities that occur in the Great Basin, and being able to distinguish between seral and stable aspen stands, can help managers better identify restoration
Authors
Douglas J. Shinneman, Anne S. Halford, Cheri Howell, Kevin Krasnow, Eva K. Strand
Synthesis of current knowledge on post-fire seeding for soil stabilization and invasive species control
The General Accounting Office has identified a need for better information on the effectiveness of post-fire emergency stabilization and rehabilitation methods used by the U.S. Forest Service and Department of Interior (DOI) agencies. Since reviews were published on treatment effectiveness in the early 2000s, treatment choices have changed and increased monitoring has been done. Greater use of nat
Authors
Jan L. Beyers, David A. Pyke, Troy Wirth
Climate change and vulnerability of bull trout (Salvelinus confluentus) in a fire-prone landscape.
Linked atmospheric and wildfire changes will complicate future management of native coldwater fishes in fire-prone landscapes, and new approaches to management that incorporate uncertainty are needed to address this challenge. We used a Bayesian network (BN) approach to evaluate population vulnerability of bull trout (Salvelinus confluentus) in the Wenatchee River basin, Washington, USA, under cur
Authors
Jeffrey A. Falke, Rebecca L. Flitcroft, Jason B. Dunham, Kristina M. McNyset, Paul F. Hessburg, Gordon H. Reeves
Songbirds as sentinels of mercury in terrestrial habitats of eastern North America
Mercury (Hg) is a globally distributed environmental contaminant with a variety of deleterious effects in fish, wildlife, and humans. Breeding songbirds may be useful sentinels for Hg across diverse habitats because they can be effectively sampled, have well-defined and small territories, and can integrate pollutant exposure over time and space. We analyzed blood total Hg concentrations from 8,446
Authors
Allyson K. Jackson, David C. Evers, Evan M. Adams, Daniel A. Cristol, Collin A. Eagles-Smith, Samuel T. Edmonds, Carrie E. Gray, Bart Hoskins, Oksana P. Lane, Amy Sauer, Timothy Tear
Long-term growth-increment chronologies reveal diverse influences of climate forcing on freshwater and forest biota in the Pacific Northwest
Analyses of how organisms are likely to respond to a changing climate have focused largely on the direct effects of warming temperatures, though changes in other variables may also be important, particularly the amount and timing of precipitation. Here, we develop a network of eight growth-increment width chronologies for freshwater mussel species in the Pacific Northwest, United States and integr
Authors
Bryan A. Black, Jason B. Dunham, Brett W. Blundon, Jayne Brim-Box, Alan J. Tepley
North Cascades National Park Service Complex
Natural Resource Condition Assessments (NRCAs) evaluate current conditions for a subset of natural resources and resource indicators in national parks. NRCAs also report on trends in resource condition (when possible), identify critical data gaps, and characterize a general level of confidence for study findings. The resources and indicators emphasized in a given project depend on the park’s resou
Authors
Robert Hoffman, Andrea Woodward, Patricia K. Haggerty, Kurt J. Jenkins, Paul C. Griffin, M. J. Adams, Joan Hagar, Tonnie Cummings, Dan Duriscoe, Karen Kopper, Jon Riedel, Lelaina Marin, Guillaume S. Mauger, Karen Bumbaco, Jeremy S. Littell
Occupancy patterns of mammals and lentic amphibians in the Elwha River riparian zone before dam removal
The downstream transport of sediments and organics and upstream migration of anadromous fishes are key ecological processes in unregulated riverine ecosystems of the North Pacific coast, but their influence on wildlife habitats and populations is poorly documented. Removal of two large hydroelectric dams in Washington’s Elwha Valley provides an unprecedented opportunity to study long-term response
Authors
Kurt J. Jenkins, Nathan Chelgren, K.A. Sager-Fradkin, P.J. Happe, M. J. Adams