Genetic structure of Mycoplasma ovipneumoniae informs pathogen spillover dynamics between domestic and wild Caprinae in the western United States
Pauline Kamath, K.R. Manlove, E. Frances Cassirer, Paul C. Cross, T. E. Besser
2019, Scientific Reports (9)
Spillover diseases have significant consequences for human and animal health, as well as wildlife conservation. We examined spillover and transmission of the pneumonia-associated bacterium Mycoplasma ovipneumoniae in domestic sheep, domestic goats, bighorn sheep, and mountain goats across the western United States using 594 isolates, collected from 1984 to...
1200 years of Upper Missouri River streamflow reconstructed from tree rings
Justin T. Martin, Gregory T. Pederson, Connie A. Woodhouse, Edward R Cook, Gregory J. McCabe, Erika K. Wise, Patrick Erger, Larry Dolan, Marketa McGuire, Subhrendu Gangopadhyay, Katherine J. Chase, Jeremy S. Littell, Stephen T. Gray, Scott St. George, Jonathan M. Friedman, David J. Sauchyn, Jannine St. Jacques, John W. King
2019, Quaternary Science Reviews (224)
Paleohydrologic records can provide unique, long-term perspectives on streamflow variability and hydroclimate for use in water resource planning. Such long-term records can also play a key role in placing both present day events and projected future conditions into a broader context than that offered by instrumental observations. However,...
Fossil tabulate corals reveal outcrops of Paleozoic sandstones in the Atlantic Coastal Plain Province, Southeastern USA
James E. Landmeyer, Francis Tourneur, Julien Denayer, Mikolaj K Zapalski
2019, PLoS ONE (14)
The geologic history of the Southeastern United States of America is missing nearly 350-million-years of rocks, sediments, and fossils. This gap defines the Fall Line nonconformity where Upper Ordovician consolidated rocks are directly overlain by Upper Cretaceous unconsolidated sediments of the Atlantic Coastal Plain Province. Here we begin to fill...
Relative contribution of climate and non-climate drivers in determining dynamic rates ofboreal birds at the edge of their range
Michale Glennon, Stephen Langdon, Madeleine A. Rubenstein, Molly S. Cross
2019, PLoS ONE (14)
The Adirondack Park in New York State contains a unique and limited distribution of boreal ecosystem types, providing habitat for a number of birds at the southern edge of their range. Species are projected to shift poleward in a warming climate, and the limited boreal forest of the Adirondacks is...
Climatic controls on the distribution of foundation plant species in coastal wetlands of the conterminous United States: Knowledge gaps and emerging research needs
Michael Osland, James B. Grace, Glenn Guntenspergen, Karen Thorne, Joel Carr, Laura Feher
2019, Estuaries and Coasts (42) 1991-2003
Foundation plant species play a critical role in coastal wetlands, often modifying abiotic conditions that are too stressful for most organisms and providing the primary habitat features that support entire ecological communities. Here, we consider the influence of climatic drivers on the distribution of foundation plant species within coastal wetlands...
Solute transport and transformation in an intermittent, headwater mountain stream with diurnal discharge fluctuations
Adam S Ward, Marie J Kurz, Noah Schmadel, Julia LA Knapp, Phillip J Blaen, Ciaran Harman, Jennifer D. Drummond, David M Hannah, Stefan Krause, Angang Li, Eugenia Marti, Alexander Milner, Kerry Neil, Stephen Plont, Aaron I. Packman, Nathan I Wisnoski, Steven Wondzell, Jay P. Zarnetske
2019, Water (11)
Time-variable discharge is known to control both transport and transformation of solutes in the river corridor. Still, few studies consider the interactions of transport and transformation together. Here, we consider how diurnal discharge fluctuations in an intermittent, headwater stream control reach-scale solute transport and transformation as measured...
A ship's ballasting history as an indicator of foraminiferal invasion potential--An example from Prince William Sound, Alaska, USA
Mary McGann, Gregory M. Ruiz, Anson H. Hines, George D. Smith
2019, Journal of Foraminiferal Research (49) 434-455
We investigated the potential role of ballast sediment from coastal and transoceanic oil tankers arriving and de-ballasting in Port Valdez as a vector for the introduction of invasive benthic foraminifera in Prince William Sound, Alaska. Forty-one ballast sediment samples were obtained in 1998-1999 from 11 oil tankers that routinely discharged...
Measuring sustainability of seed-funded Earth science informatics projects
Leslie Hsu, Vivian B. Hutchison, Madison Langseth
2019, PLoS ONE (14)
Short term funding is a common funding model for informatics projects. Funders are interested in maximizing the sustainability and accessibility of the outputs, but there are no commonly accepted practices to do so in the Earth sciences informatics field. We constructed and applied a framework for sustainability drawing from other...
Caryospora-like coccidia infecting green turtles (Chelonia mydas): An emerging disease with evidence of interoceanic dissemination
Brian A. Stacy, Phoebe A. Chapman, Heather Stockdale-Walden, Thierry M. Work, Julie Dagenais, Allen M. Foley, Morgan Wideroff, Wellehan, April L. Childress, Charles A. Manire, Mya Rodriguez, Trevor T. Zachariah, Lydia Staggs, Bette Zirkelbach, Nina Nahvi, Whitney Crowder, Shane M. Boylan, Shelly Marquardt, Craig Pelton, Terry M. Norton
2019, Frontiers in Veterinary Science (6) 1-12
Protozoa morphologically consistent with Caryospora sp. are one of the few pathogens associated with episodic mass mortality events involving free-ranging sea turtles. Parasitism of green turtles (Chelonia mydas) by these coccidia and associated mortality was first reported in maricultured turtles in the Caribbean during the 1970s. Years later, epizootics affecting...
13C and 15N NMR identification of product compound classes from aqueous and solid phase photodegradation of 2,4,6-trinitrotoluene
Kevin A. Thorn
2019, PLoS ONE (14)
Abstract Photolysis is one of the main transformation pathways for 2,4,6-trinitrotoluene (TNT) released into the environment. Upon exposure to sunlight, TNT is known to undergo both oxidation and reduction reactions with release of nitrite, nitrate, and ammonium ions, followed by condensation reactions of the oxidation and reduction products. In this...
Debris-flow monitoring and warning: Review and examples
Marcel Hurlimann, Velio Coviello, Coraline Bel, Xiaojun Guo, Matteo Berti, Christoph Graf, Johannes Hubl, Shusuke Miyata, Joel B. Smith, Hsiao-Yuan Yin
2019, Earth-Science Reviews (199)
Debris flows represent one of the most dangerous types of mass movements, because of their high velocities, large impact forces and long runout distances. This review describes the available debris-flow monitoring techniques and proposes recommendations to inform the design of future monitoring and warning/alarm systems. The selection and application of...
A Generalized Additive Model approach to evaluating water quality: Chesapeake Bay Case Study
Rebecca Murphy, Elgin Perry, Jon Harcum, Jennifer L. Keisman
2019, Environmental Modelling & Software (118)
Nutrient-reduction efforts have been undertaken in recent decades to mitigate the impacts of eutrophication in coastal and estuarine systems worldwide. To track progress in response to one of these efforts we use Generalized Additive Models (GAMs) to evaluate a diverse suite of water quality constituents over a 32-year period in...
Dextral, normal, and sinistral faulting across the eastern California shear zone-Mina deflection transition, California-Nevada
Kevin DeLano, Jeffrey Lee, Rachelle Roper, Andrew T. Calvert
2019, Geosphere (15) 1206-1239
Strike-slip faults commonly include extensional and contractional bends and stepovers, whereas rotational stepovers are less common. The Volcanic Tableland, Black Mountain, and River Spring areas (California and Nevada, USA) (hereafter referred to as the VBR region) straddle the transition from the dominantly NW-striking dextral faults that define the northwestern part...
Geese mediate vegetation state changes with parallel effects on N cycling that leave nutritional legacies for offspring
Roger W. Ruess, Jack McFarland, Brian T. Person, James S. Sedinger
2019, Ecosphere (10)
Along the coastal fringe of the Yukon–Kuskokwim River Delta in southwestern Alaska, geese maintain grazing lawns dominated by a rhizomatous sedge that, when ungrazed, transitions to a taller, less palatable growth form that is taxonomically described as a different species. Nutrients recycled in goose feces, in conjunction with grazing, are...
Relevance of wind stress and wave-dependent ocean surface roughness on the generation of winter meteotsunamis in Northern Gulf of Mexico
Lijing Shi, Maitane Olabarrieta, Arnoldo Valle-Levinson, John C. Warner
2019, Ocean Modeling (140)
Meteotsunamis associated with passing squall lines are often observed ahead of cold fronts during winter seasons in Northern Gulf of Mexico. These types of meteotsunamis occur simultaneously with wind speed variations (~5-20 m/s) and sea-level atmospheric pressure oscillations (~1-6 hPa) with periods between 2 hours to several minutes. In order...
Characterizing range-wide population divergence in an alpine-endemic bird: A comparison of genetic and genomic approaches
Kathryn Langin, Cameron L. Aldridge, Jennifer A. Fike, Robert S. Cornman, Kathy M Martin, Greg T Wann, Amy E. Seglund, Michael A Schroeder, David P Benson, Brad C. Fedy, Jessica R. Young, Scott D. Wilson, Don H Wolfe, Clait E. Braun, Sara J. Oyler-McCance
2019, Conservation Genetics (19) 1471-1485
The delineation of intraspecific units that are evolutionarily and demographically distinct is an important step in the development of species-specific management plans. Neutral genetic variation has served as the primary data source for delineating “evolutionarily significant units,” but with recent advances in genomic technology, we now have an unprecedented ability...
Evaluating the effects of barriers on Slimy Sculpin movement and population connectivity using novel sibship-based and traditional genetic metrics
Spencer Y. Weinstein, Jason A. Coombs, Keith H. Nislow, Chris Riley, Allison H. Roy, Andrew R. Whiteley
2019, Transactions of the American Fisheries Society (148) 1117-1131
Population genetics-based approaches can provide robust and cost-effective ways to assess the effects of potential barriers, including dams and road-stream crossings, on the passage and population connectivity of aquatic organisms. Determining the best way to apply and modify genetic tools for different species and situations is essential for making these...
Projected urban growth in the Southeastern USA puts small streams at risk
Peter C. Van Metre, Ian R. Waite, Sharon L. Qi, Barbara Mahler, Adam Terando, Michael Wieczorek, Michael R. Meador, Paul M. Bradley, Celeste A. Journey, Travis S. Schmidt, Daren M. Carlisle
2019, PLoS ONE (10)
Future land-use development has the potential to profoundly affect the health of aquatic ecosystems in the coming decades. We developed regression models predicting the loss of sensitive fish (R2=0.39) and macroinvertebrate (R2=0.64) taxa as a function of urban and agricultural land uses and applied them to projected urbanization of...
Plant and insect herbivore community variation across the Paleocene–Eocene boundary in the Hanna Basin, southeastern Wyoming
Lauren E Schmidt, Regan E Dunn, Jason J Mercer, Marieke Dechesne, Ellen D Currano
2019, PeerJ
Ecosystem function and stability are highly affected by internal and external stressors. Utilizing paleobotanical data gives insight into the evolutionary processes an ecosystem undergoes across long periods of time, allowing for a more complete understanding of how plant and insect herbivore communities are affected by ecosystem imbalance. To study how...
River water-quality concentration and flux estimation can be improved by accounting for serial correlation through an autoregressive model
Qian Zhang, Robert M. Hirsch
2019, Water Resources Research (55) 9705-9723
Accurate quantification of riverine water‐quality concentration and flux is challenging because monitoring programs typically collect concentration data at lower frequencies than discharge data. Statistical methods are often used to estimate concentration and flux on days without observations. One recently developed approach is the Weighted Regressions on Time, Discharge, and Season...
Do parents synchronise nest visits as an antipredator adaptation in birds of New Zealand and Tasmania?
Nyil Khwaja, Melanie Massaro, Thomas E. Martin, James V. Briskie
2019, Frontiers in Ecology and Environment (7)
Birds with altricial offspring need to feed them regularly, but each feeding visit risks drawing attention to the nest and revealing its location to potential predators. Synchronisation of visits by both parents has been suggested as a behavioural adaptation to reduce the risk of nest predation. Under this hypothesis, higher...
Drought in the U.S. Caribbean: Impacts to freshwater ecosystems
Bonnie Myers
2019, Conference Paper, U.S. Caribbean drought workshop
Healthy and functioning freshwater ecosystems are needed for successful conservation and management of native fish and invertebrate species, and the services they provide to human communities, across the U.S. Caribbean. Yet streams, rivers, and reservoirs are vulnerable to the effects of extreme weather events, urbanization, energy and water development, and...
Modeling sediment bypassing around idealized rocky headlands
Douglas A. George, John L. Largier, Greg B. Pasternack, Patrick L. Barnard, Curt D. Storlazzi, Li H. Erikson
2019, Journal of Marine Science and Engineering (7)
Alongshore sediment bypassing rocky headlands remains understudied despite the importance of characterizing littoral processes for erosion abatement, beach management, and climate change adaptation. To address this gap, a numerical model sediment transport study was developed to identify controlling factors and mechanisms for sediment headland bypassing potential. Four idealized headlands were...
Regionalization of groundwater residence time using metamodeling
J. Jeffrey Starn, Kenneth Belitz
2019, Water Resources Research (54) 6357-6373
Groundwater residence-time distributions (RTDs) are critical for assessing susceptibility of water resources to degradation. A novel combination of numerical modeling and statistical methods allows estimation of regional RTDs with unprecedented speed. In this method, particle RTDs are generated in 30 type locales in the northeastern glaciated U.S using automated...
Spatial fingerprinting of biogenic and anthropogenic volatile organic compounds in an arid unsaturated zone
Christopher Green, Wentai Luo, Christopher H. Conaway, Karl B. Haase, Ronald J. Baker, Brian J. Andraski
2019, Vadose Zone Journal (18)
Subsurface volatile organic compounds (VOCs) can pose risks to human and environmental health and mediate biological processes. VOCs have both anthropogenic and biogenic origins, but the relative importance of these sources has not been explored in subsurface environments. This study synthesizes 17 years of VOC data from the Amargosa Desert...
