Polychlorinated biphenyl tissue‐concentration thresholds for survival, growth, and reproduction in fish
Jason P. Berninger, Donald E. Tillitt
2019, Environmental Toxicology and Chemistry (38) 712-736
Polychlorinated biphenyls (PCBs) have left a legacy of environmental contamination. Even though they were banned from production and active use in the 1970s, they persist in the environment and still have the potential to impact aquatic life. Our objective was to identify data from controlled laboratory studies of PCB‐related adverse...
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...
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...
Acidification impacts and goals for gauging recovery of Brook Trout populations and fish communities in streams of the Western Adirondack Mountains, New York, USA
Barry Baldigo, Scott George, Gregory B. Lawrence, Eric Paul
2019, Transactions of the American Fisheries Society (148) 373-392
Results from several long‐term monitoring programs in the western Adirondack Mountains, New York, indicate that acid–base chemistry of headwater streams has remained unchanged or improved only marginally since the 1990s. A paucity of quantitative fishery data, however, limits our understanding of the pre‐acidified communities as well as present‐day impacts of...
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...
Seasonality of nitrate sources and isotopic composition in the Upper Illinois River
Jiajia Lin, J.K. Bohlke, Sheng Huang, Miquel Gonzalez-Meler, Neil C. Sturchio
2019, Journal of Hydrology (568) 849-861
To improve understanding of spatial, seasonal, and inter-annual variations in nitrate sources and in-stream processes in the Illinois River system, nitrate concentrations and isotopic compositions were measured in 445 water samples collected over a four-year period (2004–2008) from the Upper Illinois River Basin (UIRB). Samples included surface water in the...
Impacts of nonnative Brown Trout on Yellowstone Cutthroat Trout in a tributary stream
Robert K. Al-Chokhachy, Adam J. Sepulveda
2019, North American Journal of Fisheries Management (39) 17-28
Nonnative trout are a considerable threat to native salmonids, yet our understanding of the mechanisms behind interspecific interactions remains limited. We evaluated the impacts of nonnative Brown Trout Salmo salar on a population of Yellowstone Cutthroat Trout Oncorhynchus clarkii bouvieri in Montana. We contrasted diets, growth, and survival of Yellowstone Cutthroat Trout occurring in...
Mixed-chemical exposure and predicted effects potential in wadeable southeastern USA streams
Paul M. Bradley, Celeste A. Journey, Jason P. Berninger, Daniel T. Button, Jimmy M. Clark, Steven R. Corsi, Laura A. DeCicco, Kristina G. Hopkins, Bradley J. Huffman, Naomi Nakagaki, Julia E. Norman, Lisa H. Nowell, Sharon L. Qi, Peter C. Van Metre, Ian R. Waite
2019, Science of the Total Environment (655) 70-83
Complex chemical mixtures have been widely reported in larger streams but relatively little work has been done to characterize them and assess their potential effects in headwaterstreams. In 2014, the United States Geological Survey (USGS) sampled 54 Piedmont streams over ten weeks and measured 475 unique organic compounds using five analytical methods. Maximum and median...
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...
The Albuquerque Seismological Lab WWSSN film chip preservation project
Alexis Casondra Bianca Alejandro, Charles R. Hutt, Adam T. Ringler, Sabrina Veronica Moore, Robert Anthony, David C. Wilson
2019, Seismological Research Letters (90) 401-408
From 1961 to 1996, the Albuquerque Seismological Laboratory (ASL) installed and operated the World‐Wide Standardized Seismograph Network (WWSSN). Each station within the network consisted of three Benioff short‐period sensors and three Sprengnether Press‐Ewing long‐period sensors along with recording, timing, and calibration equipment. Approximately 3.7 million single‐day record film chips were...
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...
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....
Genetic swamping and species collapse: Tracking introgression between the native Candy Darter and introduced Variegate Darter
Isaac Gibson, Amy B. Welsh, Stuart A. Welsh, Daniel A. Cincotta
2019, Conservation Genetics (20) 287-298
Candy Darters (Etheostoma osburni) and Variegate Darters (E. variatum) are both native to West Virginia and Virginia. The geographic ranges of these two species were historically separated by Kanawha Falls, a natural barrier to fish dispersal located at Glen Ferris, WV. In the early 1980s, Variegate Darters or putative hybrids...
Clarifying regional hydrologic controls of the Marañón River, Peru through rapid assessment to inform system-wide basin planning approaches
Alice F. Hill, Robert Stallard, Karl Rittger
2019, Elementa: Science of the Anthropocene (6)
We use remote sensing to enhance the interpretation of the first baseline dataset of hydrologic, isotopic and hydrochemical variables spanning 620 km of the upper Marañón River, in Andean Peru, from the steep alpine canyons to the lower lying jungle. Remote, data-scarce river systems are under increased hydropower...
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...
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...
Optimal spatial allocation of control effort to manage invasives in the face of imperfect detection and misclassification
Mathieu Bonneau, Julien Martin, Nathalie Peyrard, LeRoy Rodgers, Christina M. Romagosa, Fred A. Johnson
2019, Ecological Modelling (392) 108-116
Imperfect detection and misclassification errors are often ignored in the context of invasive species management. Here we present an approach that combines spatially explicit models and an optimization technique to design optimal search and destroy strategies based on noisy monitoring observations. We focus on two invasive plants, melaleuca (Melaleuca quinquenervia)...
Overview of spirit microscopic imager results
Kenneth E. Herkenhoff, Steve W Squyres, Raymond E. Arvidson, Shoshanna B Cole, Rob Sullivan, Aileen Yingst, Nathalie Cabrol, Ella Lee, Janet Richie, Robert M. Sucharski, Fred J. Calef, James F. Bell III, Mary Chapman, Paul Geissler, Lauren A. Edgar, Brenda Franklin, Joel A. Hurowitz, Elsa Jensen, Jeffrey R. Johnson, Randolph L. Kirk, Peter Lanagan, Kevin Mullins, Craig Leff, Justin Maki, Bonnie L. Redding, Melissa Rice, Michael H. Sims, Annette Sunda, Nicole Spanovich, Richard Springer, Laurence A. Soderblom, Alicia Vaughan
2019, Journal of Geophysical Research E: Planets (124) 528-584
This paper provides an overview of Mars Exploration Rover Spirit Microscopic Imager (MI) operations and the calibration, processing, and analysis of MI data. The focus of this overview is on the last five Earth years (2005–2010) of Spirit's mission in Gusev crater, supplementing the previous overview of the first 450 sols of the Spirit MI...
Modeling White Sucker (Catostomus commersonii) populations to assess commercial harvest influence on age structure
Joseph D. Zydlewski, Meg Begley, Stephen Coghlan
2019, Journal of Freshwater Ecology (33) 413-428
Commercial harvest of White Suckers Catostomus commersonii for bait in the American Lobster Homarus americanus industry is minimally regulated in Maine and there are concerns as to the influence of increasing harvest. We built a population model using parameters (i.e. age-specific mortality, age at maturity, and size-specific fecundity) from literature...
Bioclimatic envelopes for individual demographic events driven by extremes: Plant mortality from drought and warming
Darin J. Law, Henry D. Adams, David D. Breshears, Neil S. Cobb, John B. Bradford, Chris B. Zou, Jason P. Field, Alfonso A. Gardea, A. Park Williams, Travis E. Huxman
2019, International Journal of Plant Sciences (80) 53-62
The occurrence of plant species across the globe is largely constrained by climate. Ecologists use plant-climate relationships such as bioclimatic envelopes and related niche models to determine potential environmental conditions promoting probable species occurrence. Traditionally bioclimatic envelopes either exclude disturbance explicitly, or only include disturbance as infrequent and smaller scale...
The extreme space weather event in September 1909
Hisashi Hayakawa, Yusuke Ebihara, Edward W. Cliver, Kentaro Hattori, Shin Toriumi, Jeffrey J. Love, Norio Umemura, Kosuke Namekata, Takahito Sakaue, Takuya Takahashi, Kazunari Shibata
2019, Monthly Notices of the Royal Astronomical Society (484) 4083-4099
We evaluate worldwide low-latitude auroral activity associated with the great magnetic storm of September 1909 for which a minimum Dst value of −595 nT has recently been determined. From auroral observations, we calculate that the equatorward boundary of the auroral oval in the 1909 event was in the range from 31°–35° invariant...
Extreme value-based methods for modeling elk yearly movements
Dhanushi A. Wijeyakulasuriya, Ephraim M. Hanks, Benjamin A. Shaby, Paul C. Cross
2019, Journal of Agricultural, Biological, and Environmental Statistics (24) 73-91
Species range shifts and the spread of diseases are both likely to be driven by extreme movements, but are difficult to statistically model due to their rarity. We propose a statistical approach for characterizing movement kernels that incorporate landscape covariates as well as the potential for heavy-tailed distributions. We used...
