Modeling strong‐motion recordings of the 2010 Mw 8.8 Maule, Chile, earthquake with high stress‐drop subevents and background slip
Arthur D. Frankel
2017, Bulletin of the Seismological Society of America (107) 372-386
Strong‐motion recordings of the Mw 8.8 Maule earthquake were modeled using a compound rupture model consisting of (1) a background slip distribution with large correlation lengths, relatively low slip velocity, and long peak rise time of slip of about 10 s and (2) high stress‐drop subevents (asperities) on the deeper portion of the rupture...
Is “morphodynamic equilibrium” an oxymoron?
Zeng Zhou, Giovanni Coco, Ian Townend, Maitane Olabarrieta, Mick van der Wegen, Zheng Gong, Andrea D’Alpaos, Shu Gao, Bruce E. Jaffe, Guy R. Gelfenbaum, Qing He, Yaping Wang, Stefano Lanzoni, Zhengbing Wang, Han Winterwerp, Changkuan Zhang
2017, Earth-Science Reviews (165) 257-267
Morphodynamic equilibrium is a widely adopted yet elusive concept in the field of geomorphology of coasts, rivers and estuaries. Based on the Exner equation, an expression of mass conservation of sediment, we distinguish three types of equilibrium defined as static and dynamic, of which two different types exist. Other expressions...
Multi-year microbial source tracking study characterizing fecal contamination in an urban watershed
Rebecca N. Bushon, Amie M.G. Brady, Eric D. Christensen, Erin A. Stelzer
2017, Water Environment Research (89) 127-143
Microbiological and hydrological data were used to rank tributary stream contributions of bacteria to the Little Blue River in Independence, Missouri. Concentrations, loadings and yields of E. coli and microbial source tracking (MST) markers, were characterized during base flow and storm events in five subbasins within Independence, as well as...
Hard choices in assessing survival past dams — a comparison of single- and paired-release strategies
Joseph D. Zydlewski, Daniel S. Stich, Douglas B. Sigourney
2017, Canadian Journal of Fisheries and Aquatic Sciences (74) 178-190
Mark–recapture models are widely used to estimate survival of salmon smolts migrating past dams. Paired releases have been used to improve estimate accuracy by removing components of mortality not attributable to the dam. This method is accompanied by reduced precision because (i) sample size is reduced relative to a single,...
Oxygen isotope geochemistry of mafic phenocrysts in primitive mafic lavas from the southernmost Cascade Range, California
Sandra J. Underwood, Michael A. Clynne
2017, American Mineralogist (102) 251-261
Previously reported whole-rock δ18O values (5.6–7.8‰) for primitive quaternary mafic lavas from the southernmost Cascades (SMC) are often elevated (up to 1‰) relative to δ18O values expected for mafic magmas in equilibrium with mantle peridotite. Olivine, clinopyroxene, and plagioclase crystals were separated from 29 geochemically well-characterized mafic lavas for δ18O...
Ground motion in the presence of complex Topography II: Earthquake sources and 3D simulations
Stephen H. Hartzell, Leonardo Ramirez-Guzman, Mark Meremonte, Alena L. Leeds
2017, Bulletin of the Seismological Society of America (107) 344-358
Eight seismic stations were placed in a linear array with a topographic relief of 222 m over Mission Peak in the east San Francisco Bay region for a period of one year to study topographic effects. Seventy‐two well‐recorded local earthquakes are used to calculate spectral amplitude ratios relative to a reference...
Quarterly wildlife mortality report January 2017
Bryan J. Richards, Daniel A. Grear, Anne Ballmann, Robert J. Dusek, Barbara Bodenstein
2017, Wildlife Disease Association Newsletter
No abstract available....
Using silver and bighead carp cell lines for the identification of a unique metabolite fingerprint from thiram-specific chemical exposure
Joel G. Putnam, Justine Nelson, Eric M. Leis, Richard A. Erickson, Terrance D. Hubert, Jon J. Amberg
2017, Chemosphere (168) 1477-1485
Conservation biology often requires the control of invasive species. One method is the development and use of biocides. Identifying new chemicals as part of the biocide registration approval process can require screening millions of compounds. Traditionally, screening new chemicals has been done in vivo using test organisms. Using in vitro (e.g.,...
Comparison of in vitro estrogenic activity and estrogen concentrations insource and treated waters from 25 U.S. drinking water treatment plants
Justin M. Conley, Nicola Evans, Heath Mash, Laura Rosenblum, Kathleen Schenck, Susan Glassmeyer, Edward T. Furlong, Dana W. Kolpin, Vickie S. Wilson
2017, Science of the Total Environment (579) 1610-1617
In vitro bioassays have been successfully used to screen for estrogenic activity in wastewater and surface water, however, few have been applied to treated drinking water. Here, extracts of source and treated water samples were assayed for estrogenic activity using T47D-KBluc cells and analyzed by liquid chromatography-Fourier transform mass spectrometry (LC-FTMS) for natural...
Book review: Karst without boundaries
Daniel H. Doctor
2017, Groundwater (54) 6-7
No abstract available....
Donor life stage influences juvenile American eel Anguilla rostrata attraction to conspecific chemical cues
Heather S. Galbraith, Carrie J. Blakeslee, Andrew K. Schmucker, Nicholas S. Johnson, Michael J. Hansen, Weiming Li
2017, Journal of Fish Biology (90) 384-395
The present study investigated the potential role of conspecific chemical cues in inland juvenile American eel Anguilla rostrata migrations by assessing glass eel and 1 year old elver affinities to elver washings, and elver affinity to adult yellow eel washings. In two-choice maze assays, glass eels were attracted to elver washings,...
Managing American Oystercatcher (Haematopus palliatus) population qrowth by targeting nesting season vital rates
Shilo K. Felton, Nathan J. Hostetter, Kenneth H. Pollock, Theodore R. Simons
2017, Waterbirds (40) 44-54
In populations of long-lived species, adult survival typically has a relatively high influence on population growth. From a management perspective, however, adult survival can be difficult to increase in some instances, so other component rates must be considered to reverse population declines. In North Carolina, USA, management to conserve the...
The American Oystercatcher (Haematopus palliatus) Working Group: 15 years of collaborative focal species research and management
Theodore R. Simons
2017, Waterbirds (40) 1-9
The American Oystercatcher (Haematopus palliatus) Working Group formed spontaneously in 2001 as coastal waterbird biologists recognized the potential for American Oystercatchers to serve as focal species for collaborative research and management. Accomplishments over the past 15 years include the establishment of rangewide surveys, color-banding protocols, mark-resight studies, a revision of...
Simulation of earthquake ground motions in the eastern United States using deterministic physics‐based and site‐based stochastic approaches
Sanaz Rezaeian, Stephen H. Hartzell, Xiaodan Sun, Carlos Mendoza
2017, Bulletin of the Seismological Society of America (107) 149-168
Earthquake ground‐motion recordings are scarce in the central and eastern United States (CEUS) for large‐magnitude events and at close distances. We use two different simulation approaches, a deterministic physics‐based method and a site‐based stochastic method, to simulate ground motions over a wide range of magnitudes. Drawing...
Four new species of Eimeria (Apicomplexa: Eimeriidae) from Emoia spp. Skinks (Sauria: Scincidae), from Papua New Guinea and the Insular Pacific
Chris T. McAllister, Donald W. Duszynski, Christopher C. Austin, Robert N. Fisher
2017, Journal of Parasitology (103) 103-110
Between September and November 1991, 54 adult skinks from 15 species were collected by hand or blowpipe from several localities on Rarotonga, Cook Islands, Ovalau Island, Fiji, and Papua New Guinea (PNG), and their feces were examined for coccidians. Species included 5 seaside skinks (Emoia atrocostata), 1 Pacific blue-tailed skink...
Prior knowledge-based approach for associating contaminants with biological effects: A case study in the St. Croix River basin, MN, WI, USA
Anthony L. Schroeder, Dalma Martinovic-Weigelt, Gerald T. Ankley, Kathy Lee, Natalia Garcia-Reyero, Edward J. Perkins, Heiko L. Schoenfuss, Daniel L. Villeneuve
2017, Environmental Pollution (221) 427-436
Evaluating potential adverse effects of complex chemical mixtures in the environment is challenging. One way to address that challenge is through more integrated analysis of chemical monitoring and biological effects data. In the present study, water samples from five locations near two municipal wastewater treatment plants in the St. Croix...
A global probabilistic tsunami hazard assessment from earthquake sources
Gareth Davies, Jonathan Griffin, Finn Lovholt, Sylfest Glimsdal, Carl Harbitz, Hong Kie Thio, Stefano Lorito, Roberto Basili, Jacopo Selva, Eric L. Geist, Maria Ana Baptista
2017, Geological Society, London, Special Publications (456) 219-244
Large tsunamis occur infrequently but have the capacity to cause enormous numbers of casualties, damage to the built environment and critical infrastructure, and economic losses. A sound understanding of tsunami hazard is required to underpin management of these risks, and while tsunami hazard assessments are typically conducted at regional or...
Modeled ecohydrological responses to climate change at seven small watersheds in the northeastern United States
Afshin Pourmokhtarian, Charles T. Driscoll, John L. Campbell, Katharine Hayhoe, Anne M. K. Stoner, Mary Beth Adams, Douglas A. Burns, Ivan Fernandez, Myron J. Mitchell, James B. Shanley
2017, Global Change Biology (23) 840-856
A cross-site analysis was conducted on seven diverse, forested watersheds in the northeastern United States to evaluate hydrological responses (evapotranspiration, soil moisture, seasonal and annual streamflow, and water stress) to projections of future climate. We used output from four atmosphere–ocean general circulation models (AOGCMs; CCSM4, HadGEM2-CC, MIROC5, and MRI-CGCM3) included...
Using diurnal temperature signals to infer vertical groundwater-surface water exchange
Dylan J. Irvine, Martin A. Briggs, Laura K. Lautz, Ryan P. Gordon, Jeffrey M. McKenzie, Ian Cartwright
2017, Groundwater (55) 10-26
Heat is a powerful tracer to quantify fluid exchange between surface water and groundwater. Temperature time series can be used to estimate pore water fluid flux, and techniques can be employed to extend these estimates to produce detailed plan-view flux maps. Key advantages of heat tracing include cost-effective sensors and...
Predicting animal home-range structure and transitions using a multistate Ornstein-Uhlenbeck biased random walk
Greg A. Breed, Emily A. Golson, M. Tim Tinker
2017, Ecology (98) 32-47
The home‐range concept is central in animal ecology and behavior, and numerous mechanistic models have been developed to understand home range formation and maintenance. These mechanistic models usually assume a single, contiguous home range. Here we describe and implement a simple home‐range model that can accommodate multiple...
Tidal triggering of earthquakes suggests poroelastic behavior on the San Andreas Fault
Andrew Delorey, Nicholas van der Elst, Paul Johnson
2017, Earth and Planetary Science Letters (460) 164-170
Tidal triggering of earthquakes is hypothesized to provide quantitative information regarding the fault's stress state, poroelastic properties, and may be significant for our understanding of seismic hazard. To date, studies of regional or global earthquake catalogs have had only modest successes in identifying tidal triggering. We posit that the smallest...
Assessing conditions influencing the longitudinal distribution of exotic brown trout (Salmo trutta) in a mountain stream: a spatially-explicit modeling approach
Christy S. Meredith, Phaedra Budy, Mevin Hooten, Marcos Oliveira Prates
2017, Biological Invasions (19) 503-519
Trout species often segregate along elevational gradients, yet the mechanisms driving this pattern are not fully understood. On the Logan River, Utah, USA, exotic brown trout (Salmo trutta) dominate at low elevations but are near-absent from high elevations with native Bonneville cutthroat trout (Onchorhynchus clarkii utah)....
Population genetics and demography unite ecology and evolution
Winsor H. Lowe, Ryan Kovach, Fred W. Allendorf
2017, Trends in Ecology and Evolution (32) 141-152
The interplay of ecology and evolution has been a rich area of research for decades. A surge of interest in this area was catalyzed by the observation that evolution by natural selection can operate at the same contemporary timescales as ecological dynamics. Specifically, recent eco-evolutionary...
The invasive ant, Solenopsis invicta, reduces herpetofauna richness and abundance
Craig R. Allen, Hannah E. Birge, J. Slater, E. Wiggers
2017, Biological Invasions (19) 713-722
Amphibians and reptiles are declining globally. One potential cause of this decline includes impacts resulting from co-occurrence with non-native red imported fire ant, Solenopsis invicta. Although a growing body of anecdotal and observational evidence from laboratory experiments supports this hypothesis, there remains a lack of field scale manipulations testing...
Fish and invertebrate flow-biology relationships to support the determination of ecological flows for North Carolina
Jennifer Phelan, Thomas F. Cuffney, Lauren A. Patterson, Michele Eddy, Robert Dykes, Sam Pearsall, Chris Goudreau, Jim Mead, Fred Tarver
2017, Journal of the American Water Resources Association (53) 42-55
A method was developed to characterize fish and invertebrate responses to flow alteration in the state of North Carolina. This method involved using 80th percentile linear quantile regressions to relate six flow metrics to the diversity of riffle-run fish and benthic Ephemeroptera, Plecoptera, and Trichoptera (EPT) richness. All twelve flow-biology...
