Publications
Filter Total Items: 2069
Improving strategies to assess competitive effects of barred owls on northern spotted owls in the Pacific Northwest Improving strategies to assess competitive effects of barred owls on northern spotted owls in the Pacific Northwest
A scientific study has determined that survey methods designed for spotted owls do not always detect barred owls that are actually present in spotted owl habitat. The researchers suggest that strategies to address potential interactions between spotted owls and barred owls will require carefully designed surveys that account for response behaviors and imperfect detection of both species...
Authors
J. David Wiens, Anne Weekes
Effects of resource availability and propagule supply on native species recruitment in sagebrush ecosystems invaded by Bromus tectorum Effects of resource availability and propagule supply on native species recruitment in sagebrush ecosystems invaded by Bromus tectorum
Resource availability and propagule supply are major factors influencing establishment and persistence of both native and invasive species. Increased soil nitrogen (N) availability and high propagule inputs contribute to the ability of annual invasive grasses to dominate disturbed ecosystems. Nitrogen reduction through carbon (C) additions can potentially immobilize soil N and reduce the
Authors
Monica B. Mazzola, Jeanne C. Chambers, Robert R. Blank, David A. Pyke, Eugene W. Schupp, Kimberly G. Allcock, Paul S. Doescher, Robert S. Nowak
Ecological influence and pathways of land use in sagebrush Ecological influence and pathways of land use in sagebrush
Land use in sagebrush (Artemisia spp.) landscapes influences all sage-grouse (Centrocer-cus spp.) populations in western North America. Croplands and the network of irrigation canals cover 230,000 km2 and indirectly influence up to 77% of the Sage-Grouse Conservation Area and 73% of sagebrush land cover by subsidizing synanthropic predators on sage-grouse. Urbanization and the demands of...
Authors
Steven T. Knick, Steven E. Hanser, Richard F. Miller, David A. Pyke, Michael J. Wisdom, Sean P. Finn, E. Thomas Rinkes, Charles J. Henny
Natural resource mitigation, adaptation and research needs related to climate change in the Great Basin and Mojave Desert Natural resource mitigation, adaptation and research needs related to climate change in the Great Basin and Mojave Desert
This report synthesizes the knowledge, opinions, and concerns of many Federal and State land managers, scientists, stakeholders, and partners from a workshop, held at the University of Nevada, Las Vegas, on April 20-22, 2010. Land managers, research scientists, and resource specialists identified common concerns regarding the potential effects of climate change on public lands and...
Authors
Debra L. Hughson, David E. Busch, Scott Davis, Sean P. Finn, Steve Caicco, Paul S.J. Verburg
Adapting to climate change at Olympic National Forest and Olympic National Park Adapting to climate change at Olympic National Forest and Olympic National Park
Climate change presents a major challenge to natural resource managers both because of the magnitude of potential effects of climate change on ecosystem structure, processes, and function, and because of the uncertainty associated with those potential ecological effects. Concrete ways to adapt to climate change are needed to help natural resource managers take the first steps to...
Authors
Jessica E. Halofsky, David L. Peterson, Kathy A. O’Halloran, Catherine H. Hoffman
Assessing the feasibility of native fish reintroductions: A framework applied to threatened bull trout Assessing the feasibility of native fish reintroductions: A framework applied to threatened bull trout
Translocations to recover native fishes have resulted in mixed success. One reason for the failure of these actions is inadequate assessments of their feasibility prior to implementation. Here, we provide a framework developed to assess the feasibility of one type of translocation—reintroduction. The framework was founded on two simple components of feasibility: the potential for...
Authors
Jason B. Dunham, Kirsten Gallo, Dan Shively, Chris Allen, Brad Goehring
Greater sage-grouse as an umbrella species for shrubland passerine birds: a multiscale assessment Greater sage-grouse as an umbrella species for shrubland passerine birds: a multiscale assessment
Working groups and government agen-cies are planning and conducting land actions in sagebrush (Artemisia spp.) habitats to benefit Greater Sage-Grouse (Centrocercus urophasianus) populations. Managers have adopted an umbrella concept, creating habitat characteristics specific to sage-grouse requirements, in the belief that other wildlife species dependent on sagebrush will benefit. We...
Authors
Steven E. Hanser, Steven T. Knick
Amplification and dampening of soil respiration by changes in temperature variability Amplification and dampening of soil respiration by changes in temperature variability
Accelerated release of carbon from soils is one of the most important feed backs related to anthropogenically induced climate change. Studies addressing the mechanisms for soil carbon release through organic matter decomposition have focused on the effect of changes in the average temperature, with little attention to changes in temperature vari-ability. Anthropogenic activities are...
Authors
C.A. Sierra, M. E. Harmon, E. Thomann, S.S. Perakis, H.W. Loescher
Connecting pattern and process in greater sage-grouse populations and sagebrush landscapes Connecting pattern and process in greater sage-grouse populations and sagebrush landscapes
Abstract. Spatial patterns influence the processes that maintain Greater Sage-Grouse (Centrocercus urophasianus) populations and sagebrush (Artemisia spp.) landscapes on which they depend. We used connectivity analyses to: (1) delineate the dominant pattern of sagebrush landscapes; (2) identify regions of the current range-wide distribution of Greater Sage-Grouse important for...
Authors
Steven T. Knick, Steven E. Hanser
Abundance of introduced species at home predicts abundance away in herbaceous communities Abundance of introduced species at home predicts abundance away in herbaceous communities
Many ecosystems worldwide are dominated by introduced plant species, leading to loss of biodiversity and ecosystem function. A common but rarely tested assumption is that these plants are more abundant in introduced vs. native communities, because ecological or evolutionary-based shifts in populations underlie invasion success. Here, data for 26 herbaceous species at 39 sites, within...
Authors
Jennifer Firn, Joslin L. Moore, Andrew S. MacDougall, Elizabeth T. Borer, Eric W. Seabloom, Janneke HilleRisLambers, W. Stanley Harpole, Elsa E. Cleland, Cynthia S. Brown, Johannes M.H. Knops, Suzanne M. Prober, David A. Pyke, Kelly A. Farrell, John D. Bakker, Lydia R. O’Halloran, Peter B. Adler, Scott L. Collins, Carla M. D'Antonio, Michael J. Crawley, Elizabeth M. Wolkovich, Kimberly J. La Pierre, Brett A. Melbourne, Yann Hautier, John W. Morgan, Andrew D.B. Leakey, Adam Kay, Rebecca McCulley, Kendi F. Davies, Carly J. Stevens, Cheng-Jin Chu, Karen D. Holl, Julia A. Klein, Phillip A. Fay, Nicole Hagenah, Kevin P. Kirkman, Yvonne M. Buckley
Conservation of greater sage-grouse- a synthesis of current trends and future management Conservation of greater sage-grouse- a synthesis of current trends and future management
Recent analyses of Greater Sage-Grouse (Centrocercus urophasianus) populations indicate substantial declines in many areas but relatively stable populations in other portions of the species? range. Sagebrush (Artemisia spp.) habitats neces-sary to support sage-grouse are being burned by large wildfires, invaded by nonnative plants, and developed for energy resources (gas, oil, and wind)
Authors
John W. Connelly, Steven T. Knick, Clait E. Braun, William L. Baker, Erik A. Beever, Thomas J. Christiansen, Kevin E. Doherty, Edward O. Garton, Christian A. Hagen, Steven E. Hanser, Douglas H. Johnson, Matthias Leu, Richard F. Miller, David E. Naugle, Sara J. Oyler-McCance, David A. Pyke, Kerry P. Reese, Michael A. Schroeder, San J. Stiver, Brett L. Walker, Michael J. Wisdorn
Complementary models of tree species-soil relationships in old-growth temperate forests Complementary models of tree species-soil relationships in old-growth temperate forests
Ecosystem-level studies identify plant–soil feedbacks as important controls on soil nutrient availability, particularly for nitrogen and phosphorus. Although site- and species-specific studies of tree species–soil relationships are relatively common, comparatively fewer studies consider multiple co-existing species in old-growth forests across a range of sites that vary in underlying...
Authors
Alison Cross, Steven S. Perakis