Development of a foraging model framework to reliably estimate daily food consumption by young fishes
David Deslauriers, Alex J. Rosburg, Steven R. Chipps
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 1668-1681
We developed a foraging model for young fishes that incorporates handling and digestion rate to estimate daily food consumption. Feeding trials were used to quantify functional feeding response, satiation, and gut evacuation rate. Once parameterized, the foraging model was then applied to evaluate effects of prey type, prey density, water...
Estimating Mudpuppy (Necturus maculosus) abundance in the Lamoille River, Vermont, USA
Isaac C. Chellman, Donna L. Parrish, Therese M. Donovan
2017, Herpetological Conservation and Biology (12) 422-434
The Mudpuppy (Necturus maculosus) is classified as a Species of Greatest Conservation Need by the state of Vermont. There is concern regarding status of populations in the Lake Champlain basin because of habitat alteration and potential effects of 3-trifluromethyl-4-nitrophenol (TFM), a chemical used to control Sea Lamprey (Petromyzon marinus). The...
Is the impact of eutrophication on phytoplankton diversity dependent on lake volume/ecosystem size?
Didier L. Baho, Stina Drakare, Richard K. Johnson, Craig R. Allen, David G. Angeler
2017, Journal of Limnology (76) 199-210
Research focusing on biodiversity responses to the interactions of ecosystem size and anthropogenic stressors are based mainly on correlative gradient studies, and may therefore confound size-stress relationships due to spatial context and differences in local habitat features across ecosystems. We investigated how local factors related to anthropogenic stressors (e.g.,eutrophication) interact...
Streamflow alteration and habitat ramifications for a threatened fish species in the Central United States
Kyle E. Juracek, Ken Eng, Daren M. Carlisle, David M. Wolock
2017, River Research and Applications (33) 993-1003
In the Central United States, the Arkansas darter (Etheostoma cragini) is listed as a threatened fish species by the State of Kansas. Survival of the darter is threatened by loss of habitat caused by changing streamflow conditions, in particular flow depletion. Future management of darter populations and habitats requires an...
Seasonality of change: Summer warming rates do not fully represent effects of climate change on lake temperatures
Luke Winslow, Jordan S. Read, Gretchen J. A. Hansen, Kevin C. Rose, Dale M. Robertson
2017, Limnology and Oceanography (62) 2168-2178
Responses in lake temperatures to climate warming have primarily been characterized using seasonal metrics of surface-water temperatures such as summertime or stratified period average temperatures. However, climate warming may not affect water temperatures equally across seasons or depths. We analyzed a long-term dataset (1981–2015) of biweekly water temperature data in...
Continuously amplified warming in the Alaskan Arctic: Implications for estimating global warming hiatus
Kang Wang, Tingjun Zhang, Xiangdong Zhang, Gary D. Clow, Elchin E. Jafarov, Irina Overeem, Vladimir Romanovsky, Xiaoqing Peng, Bin Cao
2017, Geophysical Research Letters (44) 9029-9038
Historically, in situ measurements have been notoriously sparse over the Arctic. As a consequence, the existing gridded data of surface air temperature (SAT) may have large biases in estimating the warming trend in this region. Using data from an expanded monitoring network with 31 stations in the Alaskan Arctic, we...
Relative abundance of deformed wing virus, Varroa destructor virus 1, and their recombinants in honey bees (Apis mellifera) assessed by kmer analysis of public RNA-Seq data
Robert S. Cornman
2017, Journal of Invertebrate Pathology (149) 44-50
Deformed wing virus (DWV) is a major pathogen of concern to apiculture, and recent reports have indicated the local predominance and potential virulence of recombinants between DWV and a related virus, Varroa destructor virus 1 (VDV). However, little is known about the frequency and titer of VDV and recombinants relative...
Modeling watershed-scale impacts of stormwater management with traditional versus low impact development design
Stephanie A. Sparkman, Dianna M. Hogan, Kristina G. Hopkins, J. V. Loperfido
2017, Journal of the American Water Resources Association (53) 1081-1094
Stormwater runoff and associated pollutants from urban areas in the greater Chesapeake Bay Watershed (CBW) impair local streams and downstream ecosystems, despite urbanized land comprising only 7% of the CBW area. More recently, stormwater best management practices (BMPs) have been implemented in a low impact development (LID) manner to treat...
Presentation and analysis of a worldwide database of earthquake-induced landslide inventories
Hakan Tanyas, Cees J. van Westen, Kate E. Allstadt, M. Anna Nowicki Jessee, Tolga Gorum, Randall W. Jibson, Jonathan W. Godt, Hiroshi P. Sato, Robert G. Schmitt, Odin Marc, Niels Hovius
2017, Journal of Geophysical Research F: Earth Surface (122) 1991-2015
Earthquake-induced landslide (EQIL) inventories are essential tools to extend our knowledge of the relationship between earthquakes and the landslides they can trigger. Regrettably, such inventories are difficult to generate and therefore scarce, and the available ones differ in terms of their quality and level of completeness. Moreover, access to existing...
Optimal control of an invasive species using a reaction-diffusion model and linear programming
Mathieu Bonneau, Fred A. Johnson, Brian J. Smith, Christina M. Romagosa, Julien Martin, Frank J. Mazzotti
2017, Ecosphere (8) 1-17
Managing an invasive species is particularly challenging as little is generally known about the species’ biological characteristics in its new habitat. In practice, removal of individuals often starts before the species is studied to provide the information that will later improve control. Therefore, the locations and the amount of control...
Using pharyngeal teeth and chewing pads to estimate juvenile Silver Carp total length in the La Grange Reach, Illinois River
Eli G. Lampo, Brent C. Knights, Jonathan M. Vallazza, Cory A. Anderson, Will T. Rechkemmer, Levi E. Solomon, Andrew F. Casper, Richard M. Pendleton, James T. Lamer
2017, North American Journal of Fisheries Management (37) 1145-1150
The Silver Carp Hypophthalmichthys molitrix is an invasive species in the Mississippi River basin; an understanding of their vulnerability to predation as juveniles may inform control by native predators and predator enhancement (e.g., stocking). Digestion of Silver Carp prey recovered from diets makes it difficult to determine the size‐classes that are most...
Ecological impacts of winter water level drawdowns on lake littoral zones: A review
Allison H. Roy
2017, Aquatic Sciences (79) 803-824
Freshwater littoral zones harbor diverse ecological communities and serve numerous ecosystem functions that are controlled, in part, by natural water level fluctuations. However, human alteration of lake hydrologic regimes beyond natural fluctuations threaten littoral zone ecological integrity. One type of hydrologic alteration in lakes is winter water level drawdowns, which...
Environmental conditions and prey-switching by a seabird predator impact juvenile salmon survival
Brian K. Wells, Jarrod A. Santora, Mark J. Henderson, Peter Warzybok, Jaime Jahncke, Russell W. Bradley, David D. Huff, Isaac D. Schroeder, Peter Nelson, John C. Field, David G. Ainley
2017, Journal of Marine Systems (174) 54-63
Due to spatio-temporal variability of lower trophic-level productivity along the California Current Ecosystem (CCE), predators must be capable of switching prey or foraging areas in response to changes in environmental conditions and available forage. The Gulf of the Farallones in central California represents a biodiversity hotspot and contains the largest...
Unraveling the channel–lobe transition zone with high-resolution AUV bathymetry: Navy Fan, offshore Baja California, Mexico
Cristian Carvajal, Charles K. Paull, David W. Caress, Andrea Fildani, Eve M. Lundsten, Krystle Anderson, Katherine L. Maier, Mary McGann, Roberto Gwiazda, Juan Carlos Herguera
2017, Journal of Sedimentary Research (87) 1049-1059
Ultra-high-resolution (1 m * 1 m * 0.25 m) bathymetry was acquired with an autonomous underwater vehicle (AUV) over a sector of the Navy Fan offshore Baja California. The survey specifically targeted an area where the former interpretation of the fan showed a channel–lobe transition; however, the lobe and the...
Effects of sulfide concentration and dissolved organic matter characteristics on the structure of nanocolloidal metacinnabar
Brett Poulin, Chase A. Gerbig, Christopher S. Kim, John P. Stegemeier, Joseph N. Ryan, George R. Aiken
2017, Environmental Science & Technology (51) 13133-13142
Understanding the speciation of divalent mercury (Hg(II)) in aquatic systems containing dissolved organic matter (DOM) and sulfide is necessary to predict the conversion of Hg(II) to bioavailable methylmercury. We used X-ray absorption spectroscopy to characterize the structural order of mercury in Hg(II)–DOM–sulfide systems for a range of sulfide concentration (1–100...
Are exposure predictions, used for the prioritization of pharmaceuticals in the environment, fit for purpose?
Emily E. Burns, Jane Thomas-Oates, Dana W. Kolpin, Edward T. Furlong, Alistair B.A. Boxall
2017, Environmental Toxicology and Chemistry (36) 2823-2832
Prioritization methodologies are often used for identifying those pharmaceuticals that pose the greatest risk to the natural environment and to focus laboratory testing or environmental monitoring toward pharmaceuticals of greatest concern. Risk-based prioritization approaches, employing models to derive exposure concentrations, are commonly used, but the reliability of these models is...
A fault‐based model for crustal deformation in the western United States based on a combined inversion of GPS and geologic inputs
Yuehua Zeng, Zheng-Kang Shen
2017, Bulletin of the Seismological Society of America (107) 2597-2612
We develop a crustal deformation model to determine fault‐slip rates for the western United States (WUS) using the Zeng and Shen (2014) method that is based on a combined inversion of Global Positioning System (GPS) velocities and geological slip‐rate constraints. The model consists of six blocks with...
Taxonomic and compositional differences of ground-dwelling arthropods in riparian habitats in Glen Canyon, Arizona, USA
Barbara Ralston, Neil S. Cobb, Sandra L. Brantley, Jacob Higgins, Charles B. Yackulic
2017, Western North American Naturalist (77) 369-384
The disturbance history, plant species composition, productivity, and structural complexity of a site can exert bottom-up controls on arthropod diversity, abundance, and trophic structure. Regulation alters the hydrology and disturbance regimes of rivers and affects riparian habitats by changing plant quality parameters. Fifty years of regulation along the Colorado River...
Harvesting wildlife affected by climate change: a modelling and management approach for polar bears
Eric V. Regehr, Ryan H. Wilson, Karyn D. Rode, Michael C. Runge, Harry Stern
2017, Journal of Applied Ecology (54) 1534-1543
The conservation of many wildlife species requires understanding the demographic effects of climate change, including interactions between climate change and harvest, which can provide cultural, nutritional or economic value to humans.We present a demographic model that is based on the polar bear Ursus maritimus life cycle and includes density-dependent...
The interior structure of Ceres as revealed by surface topography
Roger R. Fu, Anton Ermakov, Simone Marchi, Julie C. Castillo-Rogez, Carol A. Raymond, Bradford Hager, Maria Zuber, Scott D. King, Michael T. Bland, Maria Cristina De Sanctis, Frank Preusker, Ryan S. Park, Christopher T. Russell
2017, Earth and Planetary Science Letters (476) 153-164
Ceres, the largest body in the asteroid belt (940 km diameter), provides a unique opportunity to study the interior structure of a volatile-rich dwarf planet. Variations in a planetary body's subsurface rheology and density affect the rate of topographic relaxation. Preferential attenuation of long...
Methane in aquifers used for public supply in the United States
Peter B. McMahon, Kenneth Belitz, Jeannie R. B. Barlow, Bryant C. Jurgens
2017, Applied Geochemistry (84) 337-347
In 2013 to 2015, 833 public supply wells in 15 Principal aquifers in the U.S. were sampled to identify which aquifers contained high methane concentrations (>1 mg/L) and determine the geologic, hydrologic, and geochemical conditions associated with high concentrations. This study represents the first national assessment of methane in aquifers used...
Food-web dynamics and isotopic niches in deep-sea communities residing in a submarine canyon and on the adjacent open slopes
Amanda W.J. Demopoulos, Jennifer McClain-Counts, Steve W. Ross, Sandra Brooke, Furu Mienis
2017, Marine Ecology Progress Series (578) 19-33
Examination of food webs and trophic niches provide insights into organisms' functional ecology, yet few studies have examined trophodynamics within submarine canyons, where the interaction of canyon morphology and oceanography influences habitat provision and food deposition. Using stable isotope analysis and Bayesian ellipses, we documented deep-sea food-web structure and trophic...
Degradation of crude 4-MCHM (4-methylcyclohexanemethanol) in sediments from Elk River, West Virginia
Isabelle M. Cozzarelli, Denise M. Akob, Mary Jo Baedecker, Tracey Spencer, Jeanne B. Jaeschke, Darren S. Dunlap, Adam C. Mumford, Amisha T. Poret-Peterson, Douglas B. Chambers
2017, Environmental Science & Technology (51) 12139-12145
In January 2014, approximately 37 800 L of crude 4-methylcyclohexanemethanol (crude MCHM) spilled into the Elk River, West Virginia. To understand the long-term fate of 4-MCHM, we conducted experiments under environmentally relevant conditions to assess the potential for the 2 primary compounds in crude MCHM (1) to undergo biodegradation and (2)...
Dissolved organic matter compositional change and biolability during two storm runoff events in a small sgricultural watershed
Robert S. Eckard, Brian A. Pellerin, Brian A. Bergamaschi, Philip A. M. Bachand, Sandra M. Bachand, Robert G. M. Spencer, Peter J. Hernes
2017, Journal of Geophysical Research: Biogeosciences (122) 2634-2650
Agricultural watersheds are globally pervasive, supporting fundamentally different organic matter source, composition, and concentration profiles in comparison to natural systems. Similar to natural systems, agricultural storm runoff exports large amounts of organic carbon from agricultural land into waterways. But intense management of upper soil layers, waterway channelization,...
Alligator mississippiensis (American Alligator): Novel non-native prey
Ruth M. Elsey, Eric Ledet, Jacoby Carter
2017, Herpetological Review (48) 627-628
American Alligators are opportunistic predators and their food habits have been well studied (Elsey et al. 1992. Proc. Annu. Conf. Southeast. Assoc. Fish Wildl. Agencies 46:57–66, and references therein and below). Composition of A. mississippiensis diet often varies due to regional limitation in prey availability (Neill 1971. The Last of the...
