Spatiotemporal patterns of duck nest density and predation risk: a multi-scale analysis of 18 years and more than 10,000 nests
Kevin M. Ringelman, John M. Eadie, Joshua T. Ackerman, Andrew Sih, Daniel L. Loughman, Gregory S. Yarris, Shaun L. Oldenburger, M. Robert McLandress
2017, Oikos (126) 332-338
Many avian species are behaviorally-plastic in selecting nest sites, and may shift to new locations or habitats following an unsuccessful breeding attempt. If there is predictable spatial variation in predation risk, the process of many individuals using prior experience to adaptively change nest sites may scale up to create shifting...
Effects of thermal maturation and thermochemical sulfate reduction on compound-specific sulfur isotopic compositions of organosulfur compounds in Phosphoria oils from the Bighorn Basin, USA
Geoffrey S. Ellis, Ward Said-Ahamed, Paul G. Lillis, Lubna Shawar, Alon Amrani
2017, Organic Geochemistry (103) 63-78
Compound-specific sulfur isotope analysis was applied to a suite of 18 crude oils generated from the Permian Phosphoria Formation in the Bighorn Basin, western USA. These oils were generated at various levels of thermal maturity and some experienced thermochemical sulfate reduction (TSR). This is the first study to examine the...
Mercury contamination and stable isotopes reveal variability in foraging ecology of generalist California gulls
Sarah H. Peterson, Joshua T. Ackerman, Collin A. Eagles-Smith
2017, Ecological Indicators (74) 205-215
Environmental contaminants are a concern for animal health, but contaminant exposure can also be used as a tracer of foraging ecology. In particular, mercury (Hg) concentrations are highly variable among aquatic and terrestrial food webs as a result of habitat- and site-specific biogeochemical processes that produce the bioaccumulative form, methylmercury...
Links between atmosphere, ocean, and cryosphere from two decades of microseism observations on the Antarctic Peninsula
Robert E. Anthony, Richard C. Aster, Daniel Mcgrath
2017, Journal of Geophysical Research: Earth Surface (122) 153-166
The lack of landmasses, climatological low pressure, and strong circumpolar westerly winds between the latitudes of 50°S to 65°S produce exceptional storm‐driven wave conditions in the Southern Ocean. This combination makes the Antarctic Peninsula one of Earth's most notable regions of high‐amplitude wave activity and thus, ocean‐swell‐driven microseism noise in...
A global database of ant species abundances
Heloise Gibb, Rob R. Dunn, Nathan J. Sanders, Blair F. Grossman, Manoli Photakis, Silvia Abril, Donat Agosti, Alan N. Andersen, Elena Angulo, Ingre Armbrecht, Xavier Arnan, Fabricio B. Baccaro, Tom R. Bishop, Raphael Boulay, Carsten Bruhl, Cristina Castracani, Xim Cerda, Israel Del Toro, Thibaut Delsinne, Mireia Diaz, David A. Donoso, Aaron M. Ellison, Martha L. Enriquez, Tom M. Fayle, Donald H. Feener, Brian L. Fisher, Robert N. Fisher, Matthew C. Fitpatrick, Cristanto Gomez, Nicholas J. Gotelli, Aaron Gove, Donato A. Grasso, Sarah Groc, Benoit Guenard, Nihara Gunawardene, Brian Heterick, Benjamin Hoffmann, Milan Janda, Clinton Jenkins, Michael Kaspari, Petr Klimes, Lori Lach, Thomas Laeger, John Lattke, Maurice Leponce, Jean-Philippe Lessard, John Longino, Andrea Lucky, Sarah H. Luke, Jonathan Majer, Terrence P. McGlynn, Sean Menke, Dirk Mezger, Alessandra Mori, Jimmy Moses, Thinandavha Caswell Munyai, Renata Pacheco, Omid Paknia, Jessica Pearce-Duvet, Martin Pfeiffer, Stacy M. Philpott, Julian Resasco, Javier Retana, Rogerio R. Silva, Magdalena D. Sorger, Jorge Souza, Andrew V. Suarez, Melanie Tista, Heraldo L. Vasconcelos, Merav Vonshak, Michael D. Weiser, Michelle Yates, Catherine L. Parr
2017, Ecology (98) 883-884
What forces structure ecological assemblages? A key limitation to general insights about assemblage structure is the availability of data that are collected at a small spatial grain (local assemblages) and a large spatial extent (global coverage). Here, we present published and unpublished data from 51,388 ant abundance and occurrence records...
A multimodal wave spectrum-based approach for statistical downscaling of local wave climate
Christie Hegermiller, Jose A.A. Antolinez, Ana C. Rueda, Paula Camus, Jorge Perez, Li H. Erikson, Patrick L. Barnard, Fernando J. Mendez
2017, Journal of Physical Oceanography (47) 375-386
Characterization of wave climate by bulk wave parameters is insufficient for many coastal studies, including those focused on assessing coastal hazards and long-term wave climate influences on coastal evolution. This issue is particularly relevant for studies using statistical downscaling of atmospheric fields to local wave conditions, which are often multimodal...
Organic contamination in tree swallow (Tachycineta bicolor) nestlings at United States and binational great Lakes Areas of Concern
Thomas W. Custer, Christine M. Custer, Paul M. Dummer, Diana R. Goldberg, J. Christian Franson, Richard A. Erickson
2017, Environmental Toxicology and Chemistry (36) 735-748
Contaminant exposure of tree swallows, Tachycineta bicolor, nesting in 27 Areas of Concern (AOCs) in the Great Lakes basin was assessed from 2010 to 2014 to assist managers and regulators in their assessments of Great Lakes AOCs. Contaminant concentrations in nestlings from AOCs were compared with those in nestlings from...
Observations of seismicity and ground motion in the northeast U.S. Atlantic margin from ocean bottom seismometer data
Claudia Flores, Uri S. ten Brink, Jeffrey J. McGuire, John A. Collins
2017, Seismological Research Letters (88) 23-31
Earthquake data from two short-period ocean-bottom seismometer (OBS) networks deployed for over a year on the continental slope off New York and southern New England were used to evaluate seismicity and ground motions along the continental margin. Our OBS networks located only one earthquake of Mc∼1.5 near the shelf edge...
A trans-national monarch butterfly population model and implications for regional conservation priorities
Karen Oberhauser, Ruscena Wiederholt, James E. Diffendorfer, Darius J. Semmens, Leslie Ries, Wayne E. Thogmartin, Laura Lopez-Hoffman, Brice Semmens
2017, Ecological Entomology (42) 51-60
1. The monarch has undergone considerable population declines over the past decade, and the governments of Mexico, Canada, and the United States have agreed to work together to conserve the species.2. Given limited resources, understanding where to focus conservation action is key for widespread species like monarchs. To support planning...
Pelagic nekton abundance and distribution in the northern Sacramento–San Joaquin Delta, California
Frederick V. Feyrer, Steven B. Slater, Donald E. Portz, Darren Odom, Tara L. Morgan-King, Larry R. Brown
2017, Transactions of the American Fisheries Society (146) 128-135
Knowledge of the habitats occupied by species is fundamental for the development of effective conservation and management actions. The collapse of pelagic fish species in the Sacramento–San Joaquin Delta, California, has triggered a need to better understand factors that drive their distribution and abundance. A study was conducted in summer–fall...
A rare Uroglena bloom in Beaver Lake, Arkansas, spring 2015
William R. Green, Brad Hufhines
2017, Lake and Reservoir Management (33) 8-13
A combination of factors triggered a Uroglena volvox bloom and taste and odor event in Beaver Lake, a water-supply reservoir in northwest Arkansas, in late April 2015. Factors contributing to the bloom included increased rainfall and runoff containing increased concentrations of dissolved organic carbon, followed by a stable pool, low...
Origin and evolution of mineralizing fluids and exploration of the Cerro Quema Au-Cu deposit (Azuero Peninsula, Panama) from a fluid inclusion and stable isotope perspective
Isaac Corral, Esteve Cardellach, Merce Corbella, Angels Canals, Albert Griera, David Gomez-Gras, Craig A. Johnson
2017, Ore Geology Reviews (80) 947-960
Cerro Quema is a high sulfidation epithermal Au-Cu deposit with a measured, indicated and inferred resource of 35.98 Mt. @ 0.77 g/t Au containing 893,600 oz. Au (including 183,930 oz. Au equiv. of Cu ore). It is characterized by a large hydrothermal alteration zone which is interpreted to represent the lithocap of...
A modeling study of the impacts of Mississippi River diversion and sea-level rise on water quality of a deltaic estuary
Hongqing Wang, Q. Chen, Kelin Hu, Megan K. LaPeyre
2017, Estuaries and Coasts (40) 1028-1054
Freshwater and sediment management in estuaries affects water quality, particularly in deltaic estuaries. Furthermore, climate change-induced sea-level rise (SLR) and land subsidence also affect estuarine water quality by changing salinity, circulation, stratification, sedimentation, erosion, residence time, and other physical and ecological processes. However, little is known about how the magnitudes...
A framework for modeling emerging diseases to inform management
Robin E. Russell, Rachel A. Katz, Katherine L. D. Richgels, Daniel P. Walsh, Evan H. Campbell Grant
2017, Emerging Infectious Diseases (23) 1-6
The rapid emergence and reemergence of zoonotic diseases requires the ability to rapidly evaluate and implement optimal management decisions. Actions to control or mitigate the effects of emerging pathogens are commonly delayed because of uncertainty in the estimates and the predicted outcomes of the control tactics. The development of models...
Ecology of the Opossum Shrimp (Neomysis mercedis) in a Lower Snake River Reservoir, Washington
Kenneth F. Tiffan, John M. Erhardt, Brad K. Bickford
2017, Northwest Science (91) 124-139
The opossum shrimp Neomysis mercedis has expanded its range from the lower Columbia River upstream 695 kilometers into Lower Granite Reservoir where it is now very abundant. We studied Neomysis ecology in the reservoir during 2011–2015 to better understand the physical and biological factors that shape their distribution as well as their potential role...
Primary sources and toxicity of PAHs in Milwaukee-area streambed sediment
Austin K. Baldwin, Steven R. Corsi, Michelle A. Lutz, Christopher G. Ingersoll, Rebecca A. Dorman, Christopher Magruder, Matthew Magruder
2017, Environmental Toxicology and Chemistry (36) 1622-1635
High concentrations of polycyclic aromatic hydrocarbons (PAHs) in streams can be a significant stressor to aquatic organisms. To understand the likely sources and toxicity of PAHs in Milwaukee-area streams, streambed sediment samples from 40 sites and parking lot dust samples from 6 sites were analyzed for 38 parent PAHs and...
Spatially intensive sampling by electrofishing for assessing longitudinal discontinuities in fish distribution in a headwater stream
Celine Le Pichon, Evelyne Tales, Jerome Belliard, Christian E. Torgersen
2017, Fisheries Research (185) 90-101
Spatially intensive sampling by electrofishing is proposed as a method for quantifying spatial variation in fish assemblages at multiple scales along extensive stream sections in headwater catchments. We used this method to sample fish species at 10-m2 points spaced every 20 m throughout 5 km of a headwater stream in France. The...
Effects of varying obliquity on Martian sublimation thermokarst landforms
Colin M. Dundas
2017, Icarus (281) 115-120
Scalloped depressions in the Martian mid-latitudes are likely formed by sublimation of ice-rich ground. The stability of subsurface ice changes with the planetary obliquity, generally becoming less stable at lower axial tilt. As a result, the relative rates of sublimation and creep change over time. A landscape evolution model shows...
Informing watershed connectivity barrier prioritization decisions: A synthesis
S. K. McKay, A. R. Cooper, M.W. Diebel, D. Elkins, G. Oldford, C. Roghair, Daniel J. Wieferich
2017, River Research and Applications (33) 847-862
Water resources and transportation infrastructure such as dams and culverts provide countless socio-economic benefits; however, this infrastructure can also disconnect the movement of organisms, sediment, and water through river ecosystems. Trade-offs associated with these competing costs and benefits occur globally, with applications in barrier addition (e.g. dam and road construction),...
Observations of pockmark flow structure in Belfast Bay, Maine, Part 2: evidence for cavity flow
Christina L. Fandel, Thomas C. Lippmann, Diane L. Foster, Laura L. Brothers
2017, Geo-Marine Letters (37) 15-22
Pockmark flow circulation patterns were investigated through current measurements along the rim and center of two pockmarks in Belfast Bay, Maine. Observed time-varying current profiles have a complex vertical and directional structure that rotates significantly with depth and is strongly dependent on the phase of the tide. Observations of the...
Estimating linear temporal trends from aggregated environmental monitoring data
Richard A. Erickson, Brian R. Gray, Eric A. Eager
2017, Ecological Indicators (74) 62-72
Trend estimates are often used as part of environmental monitoring programs. These trends inform managers (e.g., are desired species increasing or undesired species decreasing?). Data collected from environmental monitoring programs is often aggregated (i.e., averaged), which confounds sampling and process variation. State-space models allow sampling variation and process variations to...
Observations of pockmark flow structure in Belfast Bay, Maine, Part 3: implications for sediment transport
Christina L. Fandel, Thomas C. Lippmann, Diane L. Foster, Laura L. Brothers
2017, Geo-Marine Letters (37) 23-34
Current observations and sediment characteristics acquired within and along the rim of two pockmarks in Belfast Bay, Maine, were used to characterize periods of sediment transport and to investigate conditions favorable to the settling of suspended sediment. Hourly averaged Shields parameters determined from horizontal current velocity profiles within the center...
Observations of pockmark flow structure in Belfast Bay, Maine, Part 1: current-induced mixing
Christina L. Fandel, Thomas C. Lippmann, James D. Irish, Laura L. Brothers
2017, Geo-Marine Letters (37) 1-14
Field observations of current profiles and temperature, salinity, and density structure were used to examine vertical mixing within two pockmarks in Belfast Bay, Maine. The first is located in 21 m water depth (sea level to rim), nearly circular in shape with a 45 m rim diameter and 12 m...
Bed texture mapping in large rivers using recreational-grade sidescan sonar
Daniel Hamill, Joseph M. Wheaton, Daniel D. Buscombe, Paul E. Grams, Theodore S. Melis
2017, Conference Paper, River Flow 2016--Eighth International Conference on Fluvial Hydraulics
The size-distribution and spatial organization of bed sediment, or bed ‘texture’, is a fundamental attribute of natural channels and is one important component of the physical habitat of aquatic ecosystems. ‘Recreational-grade’ sidescan sonar systems now offer the possibility of imaging, and subsequently quantifying bed texture at high resolution with minimal...
A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico
Jonathan S. Caine, Scott A. Minor, V. J. S. Grauch, James R. Budahn, Tucker T. Keren
2017, Geosphere (13) 1566-1609
A comprehensive survey of geologic structures formed in the Earth’s brittle regime in the eastern Española Basin and flank of the Rio Grande rift, New Mexico, reveals a complex and protracted record of multiple tectonic events. Data and analyses from this representative rift flank-basin pair include measurements from 53 individual...
