Estimating occurrence, prevalence, and detection of amphibian pathogens: Insights from occupancy models
B. A. Mosher, Adrianne Brand, ANM Wiewel, D. A. W. Miller, MT Gray, Debra L. Miller, Evan H. Campbell Grant
2019, Journal of Wildlife Diseases (55) 563-575
Understanding the distribution of pathogens across landscapes and their prevalence within host populations is a common aim of wildlife managers. Despite the need for unbiased estimates of pathogen occurrence and prevalence for planning effective management interventions, many researchers fail to account for imperfect pathogen detection. Instead raw data are often...
Evaluating consumptive and nonconsumptive predator effects on prey density using field times series data
John A. Marino, Scott D. Peacor, David Bunnell, Henry A. Vanderploeg, Steven A. Pothoven, Ashley K. Elgin, James R. Bence, J. Jiao, Edward L. Ionides
2019, Ecology (100)
Determining the degree to which predation affects prey abundance in natural communities constitutes a key goal of ecological research. Predators can affect prey through both consumptive effects (CEs) and nonconsumptive effects (NCEs), although the contributions of each mechanism to the density of prey populations remain largely hypothetical in most systems....
Congruent population genetic structure but differing depths of divergence for three alpine stoneflies with similar ecology and geographic distributions
Scott Hotaling, J. Joseph Giersch, Debra S. Finn, Lusha M. Tronstad, Steve Jordan, Larry Serpa, Ronald Call, Clint C. Muhlfeld, David W. Weisrock
2019, Freshwater Biology (64) 335-347
Comparative population genetic studies provide a powerful means for assessing the degree to which evolutionary histories may be congruent among taxa while also highlighting the potential for cryptic diversity within existing species.In the Rocky Mountains, three confamilial stoneflies (Zapada glacier , Lednia tumana , and Lednia tetonica ; Plecoptera, Nemouridae) occupy cold alpine streams...
Characterization and occurrence of confined and unconfined aquifers in Quaternary sediments in the glaciated conterminous United States
Richard M. Yager, Leon J. Kauffman, David R. Soller, Adel E. Haj, Paul M. Heisig, Cheryl A. Buchwald, Stephen, M. Westenbroek, James E. Reddy
2019, Scientific Investigations Report 2018-5091
The glacial aquifer system, which is a collection of aquifers within Quaternary sediments in the glaciated conterminous United States, is a principal aquifer that supplies groundwater that serves about 42 million people and accounts for about 5 percent of the Nation’s drinking water. This aquifer system (the area of maximum...
Delineation of selected lithologic units using airborne electromagnetic data near Cedar Rapids, Iowa
Joshua F. Valder, Adel E. Haj, Emilia L. Bristow, Kristen J. Valseth
2019, Scientific Investigations Map 3423
The U.S. Geological Survey, in cooperation with the City of Cedar Rapids, began a study in 2013 to better understand the effects of drought stress on the Cedar River alluvial aquifer. After an evaluation of the existing groundwater-flow models for the alluvial aquifer, a plan was begun to construct an...
A 50-year Sr/Ca time series from an enclosed, shallow-water Guam coral: In situ monitoring and extraction of a temperature trend, annual cycle, and ENSO and PDO signals
Tomoko Bell, Mark Lander, John Jenson, Richard Randall, Judson W. Partin, Nancy G. Prouty
2019, Journal of Coastal Research (35) 269-286
Located on the northern edge of the West Pacific Warm Pool and having a developed economy and modern infrastructure, Guam is well positioned and equipped for obtaining natural records of the west Pacific maritime paleoclimate. This study was a proof of concept to explore whether useful climate proxy records might...
Food‐web structure and ecosystem function in the Laurentian Great Lakes—Toward a conceptual model
Jessica T. Ives, Bailey C. McMeans, Kevin S. McCann, Aaron T. Fisk, Timothy B. Johnson, David B. Bunnell, Kenneth T. Frank, Andrew M. Muir
2019, Freshwater Biology (64) 1-29
The relationship between food‐web structure (i.e., trophic connections, including diet, trophic position, and habitat use, and the strength of these connections) and ecosystem functions (i.e., biological, geochemical, and physical processes in an ecosystem, including decomposition, production, nutrient cycling, and nutrient and energy flows among community members) determines how an...
Beta diversity response to stress severity and heterogeneity in sensitive versus tolerant stream diatoms
Katrina L Pound, Gregory B. Lawrence, Sophia Passy
2019, Diversity and Distributions (25) 374-384
AimSeverity and heterogeneity of stress are major constraints of beta diversity, but their relative influence is poorly understood. Here, we addressed this question by examining the patterns of beta diversity in stress‐sensitive versus stress‐tolerant stream diatoms and their response to local versus regional factors along gradients of...
Modelling gully-erosion susceptibility in a semi-arid region, Iran: Investigation of applicability of certainty factor and maximum entropy models
Ali Azareh, Omid Rahmati, Elham Rafiei-Sardooi, Joel B. Sankey, Saro Lee, Himan Shahabi, Baharin Bin Ahmad
2019, Science of the Total Environment (655) 684-696
Gully erosion susceptibility mapping is a fundamental tool for land-use planning aimed at mitigating land degradation. However, the capabilities of some state-of-the-art data-mining models for developing accurate maps of gully erosion susceptibility have not yet been fully investigated. This study assessed and compared the performance of two different types of data-mining models for accurately mapping gully...
Energetic constraints and the paradox of a diffusing population in a heterogeneous environment
Yuanshi Wang, Donald L. DeAngelis
2019, Theoretical Population Biology (125) 30-37
Previous mathematical analyses have shown that, for certain parameter ranges, a population, described by logistic equations on a set of connected patches, and diffusing among them, can reach a higher equilibrium total population when the local carrying capacities are heterogeneously distributed across patches, than when carrying capacities having the same...
Running on empty: Recharge dynamics from animal movement data
Mevin Hooten, Henry R. Scharf, Juan M. Morales
2019, Ecology Letters (22) 377-389
Vital rates such as survival and recruitment have always been important in the study of population and community ecology. At the individual level, physiological processes such as energetics are critical in understanding biomechanics and movement ecology and also scale up to influence food webs and trophic cascades. Although vital rates...
River reach restored by dam removal offers suitable spawning habitat for endangered Shortnose Sturgeon
Joseph D. Zydlewski, Catherine Johnston, Gayle Barbin Zydlewski, Sean Smith, Michael T. Kinnison
2019, Transactions of the American Fisheries Society (148) 163-175
The lowermost dam on the Penobscot River, Maine, was removed in 2013, making new habitat available for migratory fish. There is no evidence that endangered Shortnose Sturgeon Acipenser brevirostrum have spawned in the Penobscot River in recent years, but dam removal has facilitated access to potential freshwater habitat essential for...
Pulsed salmonfly emergence and its potential contribution to terrestrial detrital pools
Jeff Wesner, David Walters, Robert E. Zuellig
2019, Food Webs (18) 1-7
Adult aquatic insects are a globally important subsidy in terrestrial food webs. However, our understanding of their importance is largely limited to studies that measure predation of live insects by terrestrial predators. Yet the flux of adult aquatic insects to terrestrial detrital pools may also be an important subsidy pathway, particularly in cases where insect production...
Probability of streamflow permanence model (PROSPER): A spatially continuous model of annual streamflow permanence throughout the Pacific Northwest
Kristin Jaeger, Roy Sando, Ryan R. McShane, Jason B. Dunham, David Hockman-Wert, Kendra E. Kaiser, Konrad Hafen, John Risley, Kyle W. Blasch
2019, Journal of Hydrology X (2)
The U.S. Geological Survey (USGS) has developed the PRObability of Streamflow PERmanence (PROSPER) model, a GIS raster-based empirical model that provides streamflow permanence probabilities (probabilistic predictions) of a stream channel having year-round flow for any unregulated and minimally-impaired stream channel in the Pacific Northwest region, U.S. The model provides annual...
Water-quality trends in US rivers: Exploring effects from streamflow trends and changes in watershed management
Jennifer C. Murphy, Lori A. Sprague
2019, Science of the Total Environment (656) 645-658
We present a conceptual model that explores the relationship of streamflow trends to 15 water-quality parameters at 370 sites across the contiguous United States (US). Our analytical framework uses discrete water-quality data, daily streamflow records, and a statistical model to estimate water-quality trends between 1982 and 2012 and parse these trends into the amount of change...
Geographic attribution of soils using probabilistic modeling of GIS data for forensic search efforts
Libby A Stern, Jodi B Webb, Debra A. Willard, Christopher E. Bernhardt, David Korejwo, Maureen Bottrell, Garrett McMahon, nancy McMillan, Jared Schuetter, Patrick Wheatley, Jack Hieptas
2019, Geochemistry, Geophysics, Geosystems (20) 913-932
Examinations of soil traces associated with forensic evidence can be used to narrow potential source area(s) by characterizing features of the trace soil assemblage, some of which are limited to specific regions. Soil characteristics may be used to infer the likelihoods of the soil trace being derived...
Incorporating productivity as a measure of fitness into models of breeding area quality of Arctic peregrine falcons
David E. Andersen, Jason E. Bruggeman, Ted Swem, Patricia L. Kennedy, Debora Nigro
2019, Wildlife Biology
Using empirical location data from individuals to model habitat quality and species distributions is valuable towards understanding habitat use of wildlife, especially for conservation and management planning. Incorporating measures of reproductive success or survival into these models helps address the role of vital rates (a surrogate of fitness) in affecting...
Long-term streamflow trends in Hawai‘i and implications for native stream fauna
H. M. Clilverd, Y.-P. Tsang, D. M. Infante, Abigail Lynch, A. M. Strauch
2019, Hydrological Processes (33) 699-719
Climate change has fundamentally altered the water cycle in tropical islands, which is a critical driver of freshwater ecosystems. To examine how changes in streamflow regime have impacted habitat quality for native migratory aquatic species, we present a 50‐year (1967–2016) analysis of hydrologic records in 23...
An analysis of autocorrelation and bias in home range estimation
Michael T. Noonan, Marlee A. Tucker, Christen H. Fleming, Thomas S. Akre, Susan C Alberts, Abdullahi H. Ali, Jeanne Altmann, Pamela Castro Antunes, Jerrold L. Belant, Dean Beyer, Niels Blaum, Katrin Bohning-Gaese, Larry Cullen, Rogerio Cunha de Paula, Jasia Dekker, Jonathan Drescher-Lehman, Nina Farwig, Claudia Fichtel, Christina Fischer, Adam T. Ford, Jacob R. Goheen, Rene Janssen, Florian Jeltsch, Matthew J. Kauffman, Peter M. Kappeler, Flavia Koch, Scott LaPoint, A. Catherine Markham, Emilia Patricia Medici, Ronaldo G. Morato, Ran Nathan, Luiz G. R. Oliveira-Santos, Kirk A. Olson, Bruce D. Patterson, Agustin Paviolo, Emiliano Esterci Ramalho, Sascha Rosner, Dana G. Schabo, Nuria Selva, Agnieszka Sergiel, Marina Xavier da Silva, Orr Spiegel, Peter C. Thompson, Wiebke Ullmann, Filip Zieba, Tomasz Zwijacz-Kozica, William F. Fagan, Thomas Mueller, J.M. Calabrese
2019, Ecological Monographs (89)
Home range estimation is routine practice in ecological research. While advances in animal tracking technology have increased our capacity to collect data to support home range analysis, these same advances have also resulted in increasingly autocorrelated data. Consequently, the question of which home range estimator to use on modern, highly...
Functional and geographic components of risk for climate sensitive vertebrates in the Pacific Northwest, USA
Meryl Mims, Deanna H. Olson, David S. Pilliod, Jason B. Dunham
2019, Biological Conservation (228) 183-194
Rarity and life history traits inform multiple dimensions of intrinsic risk to climate and environmental change and can help systematically identify at-risk species. We quantified relative geographic rarity (area of occupancy), climate niche breadth, and life history traits for 114 freshwater fishes, amphibians, and reptiles in the U.S. Pacific Northwest....
Controls on organic matter distributions in Eocene Lake Uinta, Utah and Colorado
Ronald C. Johnson, Tracey J. Mercier, Justin E. Birdwell
2019, Mountain Geologist (55) 177-216
The Green River Formation deposited in Eocene Lake Uinta in the Uinta and Piceance Basins, Utah and Colorado, contains the largest oil shale resource in the world with an estimated 1.53 trillion barrels of oil in-place in the Piceance Basin and 1.32 trillion barrels in the Uinta Basin. The Douglas...
Controls of the spatial variability of denitrification potential in nontidal floodplains of the Chesapeake Bay watershed, USA
Alicia R. Korol, Gregory E. Noe, Changwoo Ahn
2019, Geoderma (338) 14-29
Identifying floodplains with high rates of denitrification will help prioritize restoration projects for the removal of nitrogen. Currently, relationships of denitrification with hydrogeomorphic, physiographic, and climate (i.e., largescale) characteristics of floodplains are relatively unknown, even though these characteristics have datasets (e.g., geographic mapping tools) that are publicly available (or soon-to-become) that could be used to understand denitrification...
Radium accumulation in carbonate river sediments at oil and gas produced water discharges: Implications for beneficial use as disposal management
Bonnie McDevitt, Molly McLaughlin, Charles A. Cravotta III, Moses A Ajemigbitse, Katherine J. Van Sice, Jens Blotevogel, Thomas Borch, Nathaniel R. Warner
2019, Environmental Science (21) 324-338
In the western U.S., produced water from oil and gas wells discharged to surface water augments downstream supplies used for irrigation and livestock watering. Here we investigate six permitted discharges on three neighboring tributary systems in Wyoming. During 2013-16, we evaluated radium activities of the permitted discharges and the...
Chesapeake Bay impact structure—Development of "brim" sedimentation in a multilayered marine target
Henning Dypvik, Gregory Gohn, Lucy Edwards, J. Wright Horton, Jr., David Powars, Ronald Litwin
2019, Book chapter, Chesapeake Bay impact structure—Development of brim sedimentation in a multilayered marine target
The late Eocene Chesapeake Bay impact structure was formed in a multilayered target of seawater underlain sequentially by a sediment layer and a rock layer in a continental-shelf environment. Impact effects in the “brim” (annular trough) surrounding and adjacent to the transient crater, between the transient crater rim and the...
Modelling effects of invasive species and drought on crayfish extinction risk and population dynamics
Allyson N. Yarra, Daniel D. Magoulick
2019, Aquatic Conservation: Marine and Freshwater Ecosystems (29) 1-11
Hydrological alteration, which may be exacerbated by climate change, is known to facilitate aquatic species invasion. Altered hydrology, invasive species, and the additive effects of these stressors pose a threat to aquatic biodiversity.Understanding extinction risk in the context of these stressors is crucial for prioritizing conservation efforts. As case...
