Associations of stream geomorphic conditions and prevalence of alternative reproductive tactics among sockeye salmon populations
L. B. DeFilippo, D.E. Schindler, J.L. Carter, Timothy E. Walsworth, T. J. Cline, Wesley Larson, T. Buehrens
2018, Journal of Evolutionary Biology (31) 239-253
In many species, males may exhibit alternative life histories to circumvent the costs of intrasexual competition and female courtship. While the evolution and underlying genetic and physiological mechanisms behind alternative reproductive tactics are well studied, there has been less consideration of the ecological factors that regulate their prevalence. Here, we...
An open source high-performance solution to extract surface water drainage networks from diverse terrain conditions
Larry V. Stanislawski, Kornelijus Survila, Jeffrey Wendel, Yan Liu, Barbara P. Buttenfield
2018, Cartography and Geographic Information Science (45) 319-328
This paper describes a workflow for automating the extraction of elevation-derived stream lines using open source tools with parallel computing support and testing the effectiveness of procedures in various terrain conditions within the conterminous United States. Drainage networks are extracted from the US Geological Survey 1/3 arc-second 3D Elevation Program...
Nanometre-sized pores in coal: Variations between coal basins and coal origin
Richard Sakurovs, Lukas Koval, Mihaela Grigore, Anna Sokolava, Leslie F. Ruppert, Yuri B. Melnichenko
2018, International Journal of Coal Geology (186) 126-134
We have used small angle neutron scattering (SANS) to investigate the differences in methane and hexane penetration in pores in bituminous coal samples from the U.S., Canada, South Africa, and China, and maceral concentrates from Australian coals. This work is an extension of previous work that showed consistent differences...
Contaminant-associated health effects in fishes from the Ottawa and Ashtabula Rivers, Ohio
Luke R. Iwanowicz, Vicki S. Blazer, Heather L. Walsh, Cassidy H. Shaw, David S. DeVault, Jo A. Banda
2018, Journal of Great Lakes Research (44) 184-196
The health of resident fishes serves as a biologically relevant barometer of aquatic ecosystem integrity. Here, the health of the Ottawa River and Ashtabula River (both within the Lake Erie Basin) were assessed using morphological and immunological biomarkers in brown bullheads (Ameiurus nebulosus) and largemouth bass (Micropterus salmoides). Biomarker metrics...
Seismic hazard, risk, and design for South America
Mark D. Petersen, Stephen Harmsen, Kishor S. Jaiswal, Kenneth S. Rukstales, Nico Luco, Kathleen Haller, Charles Mueller, Allison Shumway
2018, Bulletin of the Seismological Society of America (108) 781-800
We calculate seismic hazard, risk, and design criteria across South America using the latest data, models, and methods to support public officials, scientists, and engineers in earthquake risk mitigation efforts. Updated continental scale seismic hazard models are based on a new seismicity catalog, seismicity rate models, evaluation of earthquake sizes,...
Irregular focal mechanisms observed at Salton Sea Geothermal Field: Possible influences of anthropogenic stress perturbations
Aren Crandall-Bear, Andrew J. Barbour, Martin Schoenball
Martin Schoenball, editor(s)
2018, Conference Paper, Proceedings, 43rd Workshop on Geothermal Reservoir Engineering
At the Salton Sea Geothermal Field (SSGF), strain accumulation is released through seismic slip and aseismic deformation. Earthquake activity at the SSGF often occurs in swarm-like clusters, some with clear migration patterns. We have identified an earthquake sequence composed entirely of focal mechanisms representing an ambiguous style of faulting, where...
Tidal extension and sea-level rise: recommendations for a research agenda
Scott H. Ensign, Gregory E. Noe
2018, Frontiers in Ecology and the Environment (16) 37-43
Sea-level rise is pushing freshwater tides upstream into formerly non-tidal rivers. This tidal extension may increase the area of tidal freshwater ecosystems and offset loss of ecosystem functions due to salinization downstream. Without considering how gains in ecosystem functions could offset losses, landscape-scale assessments of ecosystem functions may be biased...
Strengthening links between waterfowl research and management
Anthony J. Roberts, John M. Eadie, David Howerter, Fred A. Johnson, James D. Nichols, Michael C. Runge, Mark P. Vrtiska, Byron K. Williams
2018, Journal of Wildlife Management (82) 260-265
Waterfowl monitoring, research, regulation, and adaptive planning are leading the way in supporting science-informed wildlife management. However, increasing societal demands on natural resources have created a greater need for adaptable and successful linkages between waterfowl science and management. We presented a special session at the 2016 North American Duck Symposium,...
Using expert knowledge to incorporate uncertainty in cause-of-death assignments for modeling of cause-specific mortality
Daniel P. Walsh, Andrew S. Norton, Daniel J. Storm, Timothy R. Van Deelen, Dennis M. Heisy
2018, Ecology and Evolution (8) 509-520
Implicit and explicit use of expert knowledge to inform ecological analyses is becoming increasingly common because it often represents the sole source of information in many circumstances. Thus, there is a need to develop statistical methods that explicitly incorporate expert knowledge, and can successfully leverage this information while properly accounting...
Resource competition model predicts zonation and increasing nutrient use efficiency along a wetland salinity gradient
Donald Schoolmaster, Camille L. Stagg
2018, Ecology (99) 670-680
A trade-off between competitive ability and stress tolerance has been hypothesized and empirically supported to explain the zonation of species across stress gradients for a number of systems. Since stress often reduces plant productivity, one might expect a pattern of decreasing productivity across the zones of the stress gradient. However,...
Variabilities in probabilistic seismic hazard maps for natural and induced seismicity in the central and eastern United States
S. Mostafa Mousavi, Gregory C. Beroza, Susan M. Hoover
2018, The Leading Edge (37) 141a1-141a9
Probabilistic seismic hazard analysis (PSHA) characterizes ground-motion hazard from earthquakes. Typically, the time horizon of a PSHA forecast is long, but in response to induced seismicity related to hydrocarbon development, the USGS developed one-year PSHA models. In this paper, we present a display of the variability in USGS hazard curves...
Estimating factors influencing the detection probability of semiaquatic freshwater snails using quadrat survey methods
Elizabeth L. Roesler, Timothy B. Grabowski
2018, Hydrobiologia (808) 153-161
Developing effective monitoring methods for elusive, rare, or patchily distributed species requires extra considerations, such as imperfect detection. Although detection is frequently modeled, the opportunity to assess it empirically is rare, particularly for imperiled species. We used Pecos assiminea (Assiminea pecos), an endangered semiaquatic snail, as a case...
Morphological indicators of a mascon beneath Ceres' largest crater, Kerwan
Michael T. Bland, Anton Ermakov, Carol A. Raymond, David A. Williams, Tim J. Bowling, F. Preusker, Ryan S. Park, Simone Marchi, Julie C. Castillo-Rogez, R.R. Fu, Christopher T. Russell
2018, Geophysical Research Letters (45) 1297-1304
Gravity data of Ceres returned by the National Aeronautics and Space Administration's Dawn spacecraft is consistent with a lower density crust of variable thickness overlying a higher density mantle. Crustal thickness variations can affect the long‐term, postimpact modification of impact craters on Ceres. Here we show...
The suitability of using dissolved gases to determine groundwater discharge to high gradient streams
Tom Gleeson, Andrew H. Manning, Andrea Popp, Mathew Zane, Jordan F. Clark
2018, Journal of Hydrology (557) 561-572
Determining groundwater discharge to streams using dissolved gases is known to be useful over a wide range of streamflow rates but the suitability of dissolved gas methods to determine discharge rates in high gradient mountain streams has not been sufficiently tested, even though headwater streams are critical as ecological habitats...
Biomarker responses of Peromyscus leucopus exposed to lead and cadmium in the Southeast Missouri Lead Mining District
W. Nelson Beyer, Stan W. Casteel, Kristen R. Friedrichs, Eric Gramlich, Ruth A. Houseright, John W. Nichols, Natalie Karouna-Renier, Dae Young Kim, Kathleen Rangen, Barnett A. Rattner, Sandra L. Schultz
2018, Environmental Monitoring and Assessment (190) 1-16
Biomarker responses and histopathological lesions have been documented in laboratory mammals exposed to elevated concentrations of lead and cadmium. The exposure of white-footed mice (Peromyscus leucopus) to these metals and the potential associated toxic effects were examined at three contaminated sites in the Southeast Missouri Lead Mining District...
Spatial patterns in occupancy and reproduction of Golden Eagles during drought: Prospects for conservation in changing environments
David Wiens, Patrick Kolar, W. Grainger Hunt, Teresa Hunt, Mark R. Fuller, Douglas A. Bell
2018, The Condor (120) 106-124
We used a broad-scale sampling design to investigate spatial patterns in occupancy and breeding success of territorial pairs of Golden Eagles (Aquila chrysaetos) in the Diablo Range, California, USA, during a period of exceptional drought (2014–2016). We surveyed 138 randomly selected sample sites over 4 occasions each year and identified...
The migratory bird treaty and a century of waterfowl conservation
Michael G. Anderson, Ray T. Alisauskas, Bruce D. J. Batt, Robert J. Blohm, Kenneth F. Higgins, Matthew Perry, James K. Ringelman, James S. Sedinger, Jerome R. Serie, David E. Sharp, David L. Trauger, Christopher K. Williams
2018, Journal of Wildlife Management (82) 247-259
In the final decades of the nineteenth century, concern was building about the status of migratory bird populations in North America. In this literature review, we describe how that concern led to a landmark conservation agreement in 1916, between the United States and Great Britain (on behalf of Canada) to...
Seventy years of stream‐fish collections reveal invasions and native range contractions in an Appalachian (USA) watershed
Joseph D. Buckwalter, Emmanuel A. Frimpong, Paul L. Angermeier, Jacob N. Barney
2018, Diversity and Distributions (24) 219-232
AimKnowledge of expanding and contracting ranges is critical for monitoring invasions and assessing conservation status, yet reliable data on distributional trends are lacking for most freshwater species. We developed a quantitative technique to detect the sign (expansion or contraction) and functional form of range‐size changes for freshwater...
Malassezia vespertilionis sp. nov.: A new cold-tolerant species of yeast isolated from bats
Jeffrey M. Lorch, Jonathan M. Palmer, Karen J. Vanderwolf, Katie Z. Schmidt, Michelle L. Verant, Theodore J. Weller, David S. Blehert
2018, Persoonia - Molecular Phylogeny and Evolution of Fungi (41) 56-70
Malassezia is a genus of medically-important, lipid-dependent yeasts that live on the skin of warm-blooded animals. The 17 described species have been documented primarily on humans and domestic animals, but few studies have examined Malassezia species associated with more diverse host groups such as wildlife. While investigating the skin mycobiota of healthy bats,...
Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate
Kaustubh Thirumalai, Terrence M. Quinn, Yuko Okumura, Julie N. Richey, Judson W. Partin, Richard Z. Poore, Eduardo Moreno-Chamarro
2018, Nature Communications (9) 1-11
Surface-ocean circulation in the northern Atlantic Ocean influences Northern Hemisphere climate. Century-scale circulation variability in the Atlantic Ocean, however, is poorly constrained due to insufficiently-resolved paleoceanographic records. Here we present a replicated reconstruction of sea-surface temperature and salinity from a site sensitive to North Atlantic circulation in the Gulf of...
Evidence for major input of riverine organic matter into the ocean
Xiaoyan Cao, George R. Aiken, Kenna D. Butler, Thomas G. Huntington, William M. Balch, Jingdong Mao, Klaus Schmidt-Rohr
2018, Organic Geochemistry (116) 62-76
The changes in the structure of XAD-8 isolated dissolved organic matter (DOM) samples along a river (Penobscot River) to estuary (Penobscot Bay) to ocean (across the Gulf of Maine) transect and from the Pacific Ocean were investigated using selective and two dimensional (2D) nuclear magnetic resonance (NMR) spectroscopy coupled with...
Response to Lisovski et al.
Henry M. Streby, Gunnar R. Kramer, Sean M. Peterson, Justin A. Lehman, David A. Buehler, David E. Andersen
2018, Current Biology (28) R101-R102
Lisovski et al. [1] describe the widely recognized limitations of light-level geolocator data for identifying short-distance latitudinal movements, recommend that caution be used when interpreting such data, intimated that we did not use such caution and argued that environmental shading likely explained the Golden-winged Warbler (Vermivora chrysoptera) movements described in our 2015...
Attributes of seasonal home range influence choice of migratory strategy in white-tailed deer
Charles R. Henderson Jr., Michael S. Mitchell, Woodrow L. Myers, Paul M. Lukacs, Gerald P. Nelson
2018, Journal of Mammalogy (99) 89-96
Partial migration is a common life-history strategy among ungulates living in seasonal environments. The decision to migrate or remain on a seasonal range may be influenced strongly by access to high-quality habitat. We evaluated the influence of access to winter habitat of high quality on the probability of a female...
Estimating wetland connectivity to streams in the Prairie Pothole Region: An isotopic and remote sensing approach
J. R. Brooks, David M. Mushet, Melanie K. Vanderhoof, Scott G. Leibowitz, J. R. Christensen, Brian Neff, Donald O. Rosenberry, W. D. Rugh, L.C. Alexander
2018, Water Resources Research (54) 955-977
Understanding hydrologic connectivity between wetlands and perennial streams is critical to understanding the reliance of stream flow on inputs from wetlands. We used the isotopic evaporation signal in water and remote sensing to examine wetland‐stream hydrologic connectivity within the Pipestem Creek watershed, North Dakota, a watershed dominated by prairie‐pothole wetlands....
Use of remote sensing to detect and predict aquatic nuisance vegetation growth in coastal Louisiana: Summary of findings
Glenn M. Suir, Kevin J. Suir, Sijan Sapkota
2018, ERDC Technical Report ERDC/EL TR-18-3
On an annual basis, federal and state agencies are responsible for mapping and removing large expanses of aquatic nuisance vegetation from navigable waterways. This study set out to achieve four primary objectives: (1) utilize recent advancements in remote sensing techniques to classify the extent and distribution of aquatic vegetation in...
