Occupancy modeling of autonomously recorded vocalizations to predict distribution of rallids in tidal wetlands
Lydia L. Stiffler, James T. Anderson, Todd E. Katzner
2018, Wetlands (38) 605-612
Conservation and management for a species requires reliable information on its status, distribution, and habitat use. We identified occupancy and distributions of king (Rallus elegans) and clapper (R. crepitans) rail populations in marsh complexes along the Pamunkey and Mattaponi Rivers in Virginia, USA by modeling data...
Investigating runoff efficiency in upper Colorado River streamflow over past centuries
Connie A. Woodhouse, Gregory T. Pederson
2018, Water Resources Research (54) 286-300
With increasing concerns about the impact of warming temperatures on water resources, more attention is being paid to the relationship between runoff and precipitation, or runoff efficiency. Temperature is a key influence on Colorado River runoff efficiency, and warming temperatures are projected to reduce runoff efficiency. Here, we investigate the...
Regional variability of nitrate fluxes in the unsaturated zone and groundwater, Wisconsin, USA
Christopher T. Green, Lixia Liao, Bernard T. Nolan, Paul F. Juckem, Christopher L. Shope, Anthony J. Tesoriero, Bryant C. Jurgens
2018, Water Resources Research (54) 301-322
Process-based modeling of regional NO3− fluxes to groundwater is critical for understanding and managing water quality, but the complexity of NO3− reactive transport processes make implementation a challenge. This study introduces a regional vertical flux method (VFM) for efficient estimation of reactive transport of NO3− in the vadose zone and...
Winter swarming behavior by the exotic cladoceran Daphnia lumholtzi Sars, 1885 in a Kentucky (USA) reservoir
John R. Beaver, Thomas R. Renicker, Claudia E. Tausz, Jade L. Young, Jennifer C. Thomason, Zachary L. Wolf, Amber L. Russell, Mac A. Cherry, Kyle C. Scotese, Dawn T. Koenig
2018, BioInvasions Records (7) 43-50
We describe swarming behavior in the invasive cladoceran Daphnia lumholtzi Sars, 1885 in a Kentucky, USA, reservoir during winter 2017. The taxon is a highly successful tropical invader and has spread throughout the lower latitude systems in the USA since its discovery in 1991. Other than a few isolated reports,...
Relations between total phosphorus and orthophosphorus concentrations and rainfall, surface-water discharge, and groundwater levels in Big Cypress Seminole Indian Reservation, Florida, 2014–16
W. Scott McBride, Dorothy F. Sifuentes
2018, Open-File Report 2018-1014
The Seminole Tribe of Florida (the Tribe) is partnering with the U.S. Environmental Protection Agency to develop a numeric phosphorus criterion for the 52,000-acre Big Cypress Seminole Indian Reservation (BCSIR), which is located downgradient of the Everglades Agricultural Area, and of other public and private lands, in southeastern Hendry County...
Aeolian stratigraphy describes ice-age paleoenvironments in unglaciated Arctic Alaska
Benjamin V. Gaglioti, Daniel H. Mann, Pamela Groves, Michael L. Kunz, Louise M. Farquharson, Richard E. Reanier, Benjamin M. Jones, Matthew J. Wooller
2018, Quaternary Science Reviews (182) 175-190
Terrestrial paleoenvironmental records with high dating resolution extending into the last ice age are rare from the western Arctic. Such records can test the synchronicity and extent of ice-age climatic events and define how Arctic landscapes respond to rapid climate changes. Here we describe the stratigraphy and sedimentology of...
Permafrost stores a globally significant amount of mercury
Paul F. Schuster, Kevin Schaefer, George R. Aiken, Ronald C. Antweiler, John F. DeWild, Joshua D. Gryziec, Alessio Gusmeroli, Gustaf Hugelius, Elchin E. Jafarov, David P. Krabbenhoft, Lin Liu, Nicole M. Herman-Mercer, Cuicui Mu, David A. Roth, Tim Schaefer, Robert G. Striegl, Kimberly P. Wickland, Tingjun Zhang
2018, Geophysical Research Letters (45) 1463-1471
Changing climate in northern regions is causing permafrost to thaw with major implications for the global mercury (Hg) cycle. We estimated Hg in permafrost regions based on in situ measurements of sediment total mercury (STHg), soil organic carbon (SOC), and the Hg to carbon ratio (RHgC) combined with maps of...
A systematic surveillance programme for infectious salmon anaemia virus supports its absence in the Pacific Northwest of the United States
Lori L. Gustafson, Lynn H. Creekmore, Kevin R. Snekvik, Jayde A. Ferguson, Janet V. Warg, Marilyn Blair, Theodore R. Meyers, Bruce Stewart, Kenneth I. Warheit, John Kerwin, Andrew E. Goodwin, Linda D. Rhodes, Janet E. Whaley, Maureen K. Purcell, Collette Bentz, Desiree Shasa, Joel Bader, James R. Winton
2018, Journal of Fish Diseases (41) 337-346
In response to reported findings of infectious salmon anaemia virus (ISAV) in British Columbia (BC), Canada, in 2011, U.S. national, state and tribal fisheries managers and fish health specialists developed and implemented a collaborative ISAV surveillance plan for the Pacific Northwest region of the United States. Accordingly, over a 3-1/2-year...
Can data from disparate long-term fish monitoring programs be used to increase our understanding of regional and continental trends in large river assemblages?
Timothy D. Counihan, Ian R. Waite, Andrew F. Casper, David L. Ward, Jennifer S. Sauer, Elise R. Irwin, Colin G. Chapman, Brian Ickes, Craig P. Paukert, John J. Kosovich, Jennifer M. Bayer
2018, PLoS ONE (13)
Understanding trends in the diverse resources provided by large rivers will help balance tradeoffs among stakeholders and inform strategies to mitigate the effects of landscape scale stressors such as climate change and invasive species. Absent a cohesive coordinated effort to assess trends in important large river resources, a logical starting...
Accommodating state shifts within the conceptual framework of the wetland continuum
David M. Mushet, Owen P. McKenna, James W. LaBaugh, Ned H. Euliss Jr., Donald O. Rosenberry
2018, Wetlands (38) 647-651
The Wetland Continuum is a conceptual framework that facilitates the interpretation of biological studies of wetland ecosystems. Recently summarized evidence documenting how a multi-decadal wet period has influenced aspects of wetland, lake and stream systems in the southern prairie-pothole region of North America has revealed the potential for wetlands to...
Semi-arid grassland bird responses to patch-burn grazing and drought
Susan K. Skagen, David J. Augustine, Justin D. Derner
2018, Journal of Wildlife Management (82) 445-456
As grassland birds of central North America experience steep population declines with changes in land use, management of remaining tracts becomes increasingly important for population viability. The integrated use of fire and grazing may enhance vegetation heterogeneity and diversity in breeding birds, but the subsequent effects on reproduction are unknown....
Flood of August 24–25, 2016, Upper Iowa River and Turkey River, northeastern Iowa
S. Mike Linhart, Padraic S. O’Shea
2018, Open-File Report 2017-1128
Major flooding occurred August 24–25, 2016, in the Upper Iowa River Basin and Turkey River Basin in northeastern Iowa following severe thunderstorm activity over the region. About 8 inches of rain were recorded for the 24-hour period ending at 4 p.m., August 24, at Decorah, Iowa, and about 6 inches...
Maturity of nearby faults influences seismic hazard from hydraulic fracturing
Maria Kozlowska, Michael R. Brudzinski, Paul A. Friberg, Robert J. Skoumal, Nicholas Baxter, Brian S. Currie
2018, Proceedings of the National Academy of Sciences of the United States of America (115) E1720-E1729
Understanding the causes of human-induced earthquakes is paramount to reducing societal risk. We investigated five cases of seismicity associated with hydraulic fracturing (HF) in Ohio since 2013 that, because of their isolation from other injection activities, provide an ideal setting for studying the relations between high-pressure...
The Colorado River and its deposits downstream from Grand Canyon in Arizona, California, and Nevada
Ryan S. Crow, Debra L. Block, Tracey J. Felger, Kyle House, Philip A. Pearthree, Brian F. Gootee, Ann M. Youberg, Keith A. Howard, L. Sue Beard
2018, Open-File Report 2018-1005
Understanding the evolution of the Colorado River system has direct implications for (1) the processes and timing of continental-scale river system integration, (2) the formation of iconic landscapes like those in and around Grand Canyon, and (3) the availability of groundwater resources. Spatial patterns in the position and type of...
Development and validation of quantitative PCR assays to measure cytokine transcript levels in the Florida manatee (Trichechus manatus latirostris)
Jason A. Ferrante, Margaret Hunter, James F.X. Wellehan
2018, Journal of Wildlife Diseases (54) 283-294
Cytokines have important roles in the mammalian response to viral and bacterial infections, trauma, and wound healing. Because of early cytokine production after physiologic stresses, the regulation of messenger RNA (mRNA) transcripts can be used to assess immunologic responses before changes in protein production. To detect and assess early immune...
Vibrio population dynamics in Mid-Atlantic surface waters during Saharan dust events
Jason R. Westrich, Dale W. Griffin, Douglas L. Westphal, Erin K. Lipp
2018, Frontiers in Marine Science (5)
Vibrio is a cosmopolitan genus of marine bacteria, highly investigated in coastal and estuarine environments. Vibrio have also been isolated from pelagic waters, yet very little is known about the ecology of these oligotrophic species. In this study we examined the relative change in bacterial abundance and more specifically the dynamics of Vibrio in the...
Hydrogeophysics at societally relevant scales: Airborne electromagnetic applications and model structural uncertainty quantification
Burke J. Minsley, Nathan Leon Foks, Wade Kress, James R. Rigby
2018, Conference Paper, SEG technical program expanded abstracts 2018
There is a critical and growing need for information about subsurface geological properties and processes over sufficiently large areas that can inform key scientific and societal studies. Airborne geophysical methods fill a unique role in Earth observation because of their ability to detect deep subsurface properties at regional scales and...
Geomorphic identification of physical habitat features in a large, altered river system
L. Guertault, G. Fox, Shannon K. Brewer
2018, Conference Paper, River flow 2018 - Ninth international conference on fluvial hydraulics
Altered flow regimes in streams can significantly affect ecosystems and disturb ecological processes, leading to species loss and extinction. Many river management projects use stream classification and habitat assessment approaches to design practical solutions to reverse or mitigate adverse effects of flow regime alteration on stream systems. The objective of...
Development of a species status assessment process for decisions under the U.S. Endangered Species Act
David R. Smith, Nathan L. Allan, Conor P. McGowan, Jennifer A. Szymankski, Susan R. Oetker, Heather M. Bell
2018, Journal of Fish and Wildlife Management (9) 302-320
Decisions under the U.S. Endangered Species Act (ESA) require scientific input on the risk that the species will become extinct. A series of critiques on the role of science in ESA decisions have called for improved consistency and transparency in species risk assessments and clear distinctions between science input and...
Case study comparing multiple irrigated land datasets in Arizona and Colorado, USA
Hua Shi, Roger F. Auch, James Vogelmann, Min Feng, Matthew B. Rigge, Gabriel B. Senay, James Verdin
2018, Journal of American Water Resources Association (54) 505-526
While there are currently a number of irrigated land datasets available for the western United States (U.S.), there is uncertainty regarding in how they relate to each other. To help understand the characteristics of available irrigated datasets, we compared (1) the Cropland Data Layer (CDL), (2)...
Satellite psychrometric formulation of the operational simplified surface energy balance (SSEBop) model for quantifying and mapping evapotranspiration
Gabriel B. Senay
2018, Applied Engineering in Agriculture (34) 555-566
Remote sensing-based evapotranspiration (ET) can be derived using various methods, from soil moisture accounting to vegetation-index based approaches to simple and complex surface energy balance techniques. Due to the complexity of fully representing and parameterizing ET sub-processes, different models tend to diverge in their estimations. However, most models appear to...
Euler-vector clustering of GPS velocities defines microplate geometry in southwest Japan
James C. Savage
2018, JGR Solid Earth (123) 1954-1968
I have used Euler-vector clustering to assign 469 GEONET stations in southwest Japan to k clusters (k = 2, 3,..., 9) so that, for any k, the velocities of stations within each cluster are most consistent with rigid-block motion on a sphere. That is, I attempt to explain the raw (i.e., uncorrected for strain accumulation),...
Unifying concepts linking dissolved organic matter composition to persistence in aquatic ecosystems
Anne M. Kellerman, Francois Guillemette, David C. Podgorski, George R. Aiken, Kenna D. Butler, Robert G. M. Spencer
2018, Environmental Science & Technology (52) 2538-2548
The link between composition and reactivity of dissolved organic matter (DOM) is central to understanding the role aquatic systems play in the global carbon cycle; yet, unifying concepts driving molecular composition have yet to be established. We characterized 37 DOM isolates from diverse aquatic ecosystems, including their stable and radiocarbon...
Determining on-fault earthquake magnitude distributions from integer programming
Eric L. Geist, Thomas E. Parsons
2018, Computers & Geosciences (111) 244-259
Earthquake magnitude distributions among faults within a fault system are determined from regional seismicity and fault slip rates using binary integer programming. A synthetic earthquake catalog (i.e., list of randomly sampled magnitudes) that spans millennia is first formed, assuming that regional seismicity follows a Gutenberg-Richter relation. Each earthquake in the...
Remote sensing and modeling to fill the “gap” in missing natural capital
Kenneth J. Bagstad, Simon Willcock, Glenn-Marie Lange
2018, Book chapter, The changing wealth of nations 2018 : Building a sustainable future
This chapter reviews recent advances in remote sensing and environmental modeling that address the first step in ecosystem accounting: biophysical quantification of ecosystem services. The chapter focuses on those ecosystem services in which the most rapid advances are likely, including crop pollination, sediment regulation, carbon sequestration and storage, and coastal...
