Publications
Filter Total Items: 2071
Supervised versus unsupervised approaches to classification of accelerometry data Supervised versus unsupervised approaches to classification of accelerometry data
Sophisticated animal-borne sensor systems are increasingly providing novel insight into how animals behave and move. Despite their widespread use in ecology, the diversity and expanding quality and quantity of data they produce have created a need for robust analytical methods for biological interpretation. Machine learning tools are often used to meet this need. However, their relative
Authors
Maitreyi Sur, Jonathan C. Hall, Joseph Brandt, Molly Astell, Sharon A. Poessel, Todd E. Katzner
Who spawns where? Temperature, elevation, and discharge differentially affect the distribution of breeding by six Pacific salmonids within a large river basin Who spawns where? Temperature, elevation, and discharge differentially affect the distribution of breeding by six Pacific salmonids within a large river basin
Within the geographic range of salmonid fishes, many apparently suitable rivers and streams are used for reproduction by some species but not others. This is widely known but seldom addressed, as studies often examine factors determining the distribution of one or only a few species. We examined physical factors associated with the spawning distribution of six native Pacific salmonids...
Authors
Catherine S Austin, Christian E. Torgersen, Thomas P. Quinn
A multi-level assessment of biological effects associated with mercury concentrations in smallmouth bass, Micropterus dolomieu A multi-level assessment of biological effects associated with mercury concentrations in smallmouth bass, Micropterus dolomieu
Total mercury (THg) was measured in muscle (fillet) and liver tissue of adult smallmouth bass Micropterus dolomieu collected at multiple sites in the Potomac and Susquehanna River drainages within the Chesapeake Bay watershed. Smallmouth bass in these drainages have experienced episodic mortality events, a high prevalence of skin lesions and reproductive endocrine disruption (intersex or
Authors
Vicki S. Blazer, Heather L. Walsh, Adam Sperry, Brenna Raines, James Willacker, Collin A. Eagles-Smith
Nitrogen-bedrock interactions regulate multi-element nutrient limitation and sustainability in forests Nitrogen-bedrock interactions regulate multi-element nutrient limitation and sustainability in forests
Nutrient limitation of tree growth can intensify when nutrients are lost to forest harvest, creating challenges for forest growth and sustainability. Forest harvest accelerates nutrient loss by removing nutrient-containing biomass and by increasing nutrient leaching, shaping patterns of nutrient depletion that cause long-term shifts in nutrient limitation. Nitrogen most frequently limits...
Authors
Kaveh G. Siah, Steven S. Perakis, Julie C. Pett-Ridge, Gregory van der Heijden
Trends, impacts, and cost of catastrophic and frequent wildfires in the sagebrush biome Trends, impacts, and cost of catastrophic and frequent wildfires in the sagebrush biome
Fire regimes in sagebrush (Artemisia spp.) ecosystems have been greatly altered across the western United States. Broad-scale invasion of non-native annual grasses, climate change, and human activities have accelerated wildfire cycles, increased fire size and severity, and lengthened fire seasons in many sagebrush ecosystems to the point that current wildfire-management practices and...
Authors
Michele R. Crist, Rick Belger, Kirk W. Davies, Dawn M. Davis, James Meldrum, Douglas J. Shinneman, Thomas E. Remington, Justin L. Welty, Kenneth E. Mayer
Goldilocks forbs: Survival is highest outside—but not too far outside—of Wyoming big sagebrush canopies Goldilocks forbs: Survival is highest outside—but not too far outside—of Wyoming big sagebrush canopies
In arid and semiarid systems, positive effects of nurse shrubs generally occur immediately underneath and around shrub canopies, creating microsites that can be targeted to promote plant establishment in restoration settings. Alternatively, the best microsites may occur in the interspace zone immediately surrounding nurse shrubs if positive abiotic effects extend beyond nurse shrub...
Authors
Sofia Koutzoukis, David A. Pyke, Mark W. Brunson, Jacopo A. Baggio, Carmen Calzado-Martinez, Kari E. Veblen
Assessing large landscape patterns of potential fire connectivity using circuit methods Assessing large landscape patterns of potential fire connectivity using circuit methods
Context Minimizing negative impacts of wildfire is a major societal objective in fire-prone landscapes. Models of fire connectivity can aid in understanding and managing wildfires by analyzing potential fire spread and conductance patterns. We define ‘fire connectivity’ as the landscape’s capacity to facilitate fire transmission from one point on the landscape to another.Objectives Our...
Authors
Erin K. Buchholtz, Jason R. Kreitler, Douglas J. Shinneman, Michele R. Crist, Julie A. Heinrichs
Forecasting natural regeneration of sagebrush after wildfires using population models and spatial matching Forecasting natural regeneration of sagebrush after wildfires using population models and spatial matching
Context Addressing ecosystem degradation in the Anthropocene will require ecological restoration across large spatial extents. Identifying areas where natural regeneration will occur without direct resource investment will improve scalability of restoration actions.Objectives An ecoregion in need of large scale restoration is the Great Basin of the Western US, where increasingly large...
Authors
Andrii Zaiats, Megan E Cattau, David S. Pilliod, Liu Rongsong, Juan M. Requena-Mullor, Trevor Caughlin
Symbiotic nitrogen fixation does not stimulate soil phosphatase activity under temperate and tropical trees Symbiotic nitrogen fixation does not stimulate soil phosphatase activity under temperate and tropical trees
Symbiotic nitrogen (N)-fixing plants can enrich ecosystems with N, which can alter the cycling and demand for other nutrients. Researchers have hypothesized that fixed N could be used by plants and soil microbes to produce extracellular phosphatase enzymes, which release P from organic matter. Consistent with this speculation, the presence of N-fixing plants is often associated with high
Authors
Emily Jager, Andrew Quebbeman, Amelia A. Wolf, Steven S. Perakis, Jennifer L. Funk, Duncan N.L. Menge
Experimental manipulation of soil-surface albedo alters phenology and growth of Bromus tectorum (cheatgrass) Experimental manipulation of soil-surface albedo alters phenology and growth of Bromus tectorum (cheatgrass)
Purpose The sensitivity of wildland plants to temperature can be directly measured using experimental manipulations of temperature in situ. We show that soil surface temperature and plant density (per square meter) have a significant impact on the germination, growth, and phenology of Bromus tectorum L., cheatgrass, a short-statured invasive winter-annual grass, and assess a new...
Authors
Toby M. Maxwell, Matthew J. Germino, Seth Romero, Lauren M. Porensky, Dana M. Blumenthal, Cynthia S. Brown, Peter B. Adler
Vulnerability to climate change of managed stocks in the California Current large marine ecosystem Vulnerability to climate change of managed stocks in the California Current large marine ecosystem
Introduction: Understanding how abundance, productivity and distribution of individual species may respond to climate change is a critical first step towards anticipating alterations in marine ecosystem structure and function, as well as developing strategies to adapt to the full range of potential changes. Methods: This study applies the NOAA (National Oceanic and Atmospheric...
Authors
Michelle M McClure, Melissa A. Haltuch, Ellen Willis-Norton, David D. Huff, Elliott L. Hazen, Lisa G. Crozier, Michael G. Jacox, Mark W. Nelson, Kelly S. Andrews, Lewis A. K. Barnett, Aaron M. Berger, Sabrina Beyer, Joe Bizzarro, David A. Boughton, Jason M. Cope, Mark H. Carr, Heidi Dewar, Edward Dick, Dorval Emmanis, Jason B. Dunham, Vladlena Gertseva, Correigh M. Greene, Richard G. Gustafson, Hamel Owen S., Chris J. Harvey, Mark J. Henderson, Chris E. Jordan, Isaac C. Kaplan, Steven T. Lindley, Nathan J. Mantua, Sean E. Matson, Melissa H. Monk, Peter B. Moyle, Colin L Nicol, John Pohl, Ryan R. Rykaczewski, Jameal F. Samhouri, Susan Sogard, Nick Tolimieri, John Wallace, Chantel Wetzel, Steven J. Bograd
Does post-fire recovery of native grasses across abiotic-stress and invasive-grass gradients match theoretical predictions, in sagebrush steppe? Does post-fire recovery of native grasses across abiotic-stress and invasive-grass gradients match theoretical predictions, in sagebrush steppe?
Interactions among species can strongly affect how plant communities reassemble after disturbances, and variability among native and invasive species across environmental gradients must be known in order to manage plant-community recovery. The stress-gradient hypothesis (SGH) predicts species interactions will be more positive in abiotically stressful conditions and conversely, more...
Authors
Christopher R. Anthony, Matthew J. Germino