Publications
Filter Total Items: 1990
Plants in alpine environments
Alpine and subalpine plant species are of special interest in ecology and ecophysiology because they represent life at the climate limit and changes in their relative abundances can be a bellwether for climate-change impacts.
Perennial life forms dominate alpine plant communities, and their form and function reflect various avoidance, tolerance, or resistance strategies to interactions of cold te
Authors
Matthew J. Germino
Soil-plant-microbial relations in hydrothermally altered soils of Northern California
Soils developed on relict hydrothermally altered soils throughout the Western USA present unique opportunities to study the role of geology on above and belowground biotic activity and composition. Soil and vegetation samples were taken at three unaltered andesite and three hydrothermally altered (acid-sulfate) sites located in and around Lassen VolcanicNational Park in northeastern California. In
Authors
S.W. Blecker, L.L. Stillings, N.M. DeCrappeo, J.A. Ippolito
Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon
The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted owls has emerged in the form of an invasive competitor: the con
Authors
J. David Wiens, Robert G. Anthony, Eric D. Forsman
Mercury cycling in agricultural and managed wetlands: a synthesis of methylmercury production, hydrologic export, and bioaccumulation from an integrated field study
With seasonal wetting and drying, and high biological productivity, agricultural wetlands (rice paddies) may enhance the conversion of inorganic mercury (Hg(II)) to methylmercury (MeHg), the more toxic, organic form that biomagnifies through food webs. Yet, the net balance of MeHg sources and sinks in seasonal wetland environments is poorly understood because it requires an annual, integrated asse
Authors
Lisamarie Windham-Myers, Jacob A. Fleck, Joshua T. Ackerman, Mark C. Marvin-DiPasquale, Craig A. Stricker, Wesley A. Heim, Philip A.M. Bachand, Collin A. Eagles-Smith, Gary Gill, Mark Stephenson, Charles N. Alpers
Identifying resource manager information needs for the North Pacific Landscape Conservation Cooperative
Landscape Conservation Cooperatives (LCCs) are a network of 22 public-private partnerships, defined by ecoregion, that share and provide science to ensure the sustainability of land, water, wildlife and cultural resources in North America. LLCs were established by the U.S. Department of Interior (DOI) in recognition that response to climate change must be coordinated on a landscape-level basis bec
Authors
Andrea Woodward, Theresa Liedtke, Karen Jenni
Adaptive responses reveal contemporary and future ecotypes in a desert shrub
Interacting threats to ecosystem function, including climate change, wildfire, and invasive species necessitate native plant restoration in desert ecosystems. However, native plant restoration efforts often remain unguided by ecological genetic information. Given that many ecosystems are in flux from climate change, restoration plans need to account for both contemporary and future climates when c
Authors
Bryce A. Richardson, Stanley G. Kitchen, Rosemary L. Pendleton, Burton K. Pendleton, Matthew J. Germino, Gerald E. Rehfeldt, Susan E. Meyer
Comparisons of genetic diversity in captive versus wild populations of the federally endangered Quino checkerspot butterfly (Euphydryas editha quino Behr; Lepidoptera: Nymphalidae)
Captive populations can play a significant role in threatened and endangered species management. An important consideration when developing and managing captive populations, however, is the maintenance of genetic diversity to ensure that adequate variation exists to avoid the negative consequences of inbreeding. In this investigation, we compared genetic diversity patterns within captive and wild
Authors
Mark P. Miller, Gordon F. Pratt, Thomas D. Mullins, Susan M. Haig
Reconstructing disturbances and their biogeochemical consequences over multiple timescales
Ongoing changes in disturbance regimes are predicted to cause acute changes in ecosystem structure and function in the coming decades, but many aspects of these predictions are uncertain. A key challenge is to improve the predictability of postdisturbance biogeochemical trajectories at the ecosystem level. Ecosystem ecologists and paleoecologists have generated complementary data sets about distur
Authors
Kendra K. McLauchlan, Philip E. Higuera, Daniel G. Gavin, Steven S. Perakis, Michelle C. Mack, Heather Alexander, John Battles, Franco Biondi, Brian Buma, Daniele Colombaroli, Sara K. Enders, Daniel R. Engstrom, Feng Sheng Hu, Jennifer R. Marlon, John Marshall, Matt McGlone, Jesse L. Morris, Lucas E. Nave, Bryan Shuman, Erica A.H. Smithwick, Dunia H. Urrego, David A. Wardle, Christopher J. Williams, Joseph J. Williams
Geographic variability in elevation and topographic constraints on the distribution of native and nonnative trout in the Great Basin
Understanding local and geographic factors influencing species distributions is a prerequisite for conservation planning. Our objective in this study was to model local and geographic variability in elevations occupied by native and nonnative trout in the northwestern Great Basin, USA. To this end, we analyzed a large existing data set of trout presence (5,156 observations) to evaluate two fundame
Authors
Dana R. Warren, Jason B. Dunham, David Hockman-Wert
A reference system for animal biometrics: application to the northern leopard frog
Reference systems and public databases are available for human biometrics, but to our knowledge nothing is available for animal biometrics. This is surprising because animals are not required to give their agreement to be in a database. This paper proposes a reference system and database for the northern leopard frog (Lithobates pipiens). Both are available for reproducible experiments. Results of
Authors
D. Petrovska-Delacretaz, A. Edwards, J. Chiasson, G. Chollet, D. S. Pilliod
Elk monitoring in Lewis and Clark National Historical Park: 2008-2012 synthesis report
Maintaining elk (Cervus elaphus roosevelti) herds that frequent Lewis and Clark National Historical Park (NHP) is central to the park’s purpose of preserving the historic, cultural, scenic, and natural resources associated with the winter encampment of the Lewis and Clark expedition. Elk were critically important to the Lewis and Clark expedition in providing food and hides that sustained the expe
Authors
Paul C. Griffin, Kurt J. Jenkins, Carla Cole, Chris Clatterbuck, John Boetsch, Katherine Beirne
New host and distribution records of the leech Placobdella sophieae Oceguera-Figueroa et al., 2010 (Hirudinida: Glossiphoniidae)
Placobdella sophieae Oceguera-Figueroa et al., 2010 (Hirudinida: Glossiphoniidae) is reported from Oregon, California, and British Columbia for the first time. New hosts reported for P. sophieae include Taricha granulosa (rough-skinned newt), Rana pretiosa (Oregon spotted frog), and Anaxyrus boreas (western toad). Placobdella sophieae exhibits relatively low host specificity and all amphibians occ
Authors
William E. Moser, Jay Bowerman, Peter Hovingh, Christopher A. Pearl, Alajandro Oceguera-Figueroa