Nanoscale molecular fractionation of organic matter within unconventional petroleum source beds
Aaron M. Jubb, Paul C. Hackley, Javin J. Hatcherian, Jing Qu, Timothy O Nesheim
2019, Energy and Fuels (33) 97859-9766
Fractionation of petroleum during migration through sedimentary rock matrices has been observed across lengths of meters to kilometers. Selective adsorption of specific chemical moieties at mineral surfaces and/or the phase behavior of petroleum during pressure changes typically are invoked to explain this behavior. Such phenomena are of interest as they...
Optimizing walking pace to maximize snake detection rate: A visual encounter survey experiment
Bjorn Lardner, Amy A. Yackel Adams, Julie A. Savidge, Robert Reed
2019, Herpetologica (75) 218-223
Visual encounter survey efforts can be defined and constrained by duration, distance, or both duration and distance simultaneously. This study examines the optimal walking pace that will maximize the number of animal detections within a limited time frame. We predicted that animal sighting rate per...
Contaminant concentrations in sediments, aquatic invertebrates, and fish in proximity to rail tracks used for coal transport in the Pacific Northwest: A baseline assessment
Whitney B Hapke, Robert W. Black, Collin A. Eagles-Smith, Cassandra Smith, Lyndal Johnson, Gina M Ylitalo, Daryle Boyd, Jay W. Davis, Sara L. Caldwell Eldridge, Elena Nilsen
2019, Archives of Environmental Contamination and Toxicology (77) 549-574
Railway transport of coal poses an environmental risk because coal dust contains polycyclic aromatic hydrocarbons (PAHs), mercury (Hg), and other trace metals. In the Pacific Northwest, proposed infrastructure projects could result in an increase in coal transport by train through the Columbia River corridor. Baseline information is needed on current...
Middle Pleistocene formation of the Rio Grande Gorge, San Luis Valley, south-central Colorado and north-central New Mexico, USA: Process, timing, and downstream implications
Chester A. Ruleman, Adam M. Hudson, Ren A. Thompson, Daniel P. Miggins, James B. Paces, Brent M. Goehring
2019, Quaternary Science Reviews (223)
The Rio Grande is the fourth longest river in North America extending over 3,000 km from the Rocky Mountains to the Gulf of Mexico. The Pleistocene evolution of this river from individual subbasins into a coalesced fluvial system has been long debated. Herein, we constrain the middle Pleistocene evolution of the...
Aquatic–terrestrial linkages provide novel opportunities for freshwater ecologists to engage stakeholders and inform riparian management
Jeffrey Muehlbauer, Christina A. Lupoli, Johanna M. Kraus
2019, Freshwater Science (38) 946-952
Studies of aquatic–terrestrial ecosystem linkages explore the mechanisms by which components of one ecosystem, such as the aquatic insect community in a stream, directly affect components of an adjacent ecosystem, such as the density and diversity of riparian predators. On a human level, research into these linkages...
Evaluating the potential for sea lice to evolve freshwater tolerance as a consequence of freshwater treatments in salmon aquaculture
Maya Groner, Emilie Laurin, Marit Stormoen, Javier Sanchez, Mark D Fast, Crawford W. Revie
2019, Aquaculture Environment Interactions (11) 507-519
Increasing usage of non-medicinal methods (NMMs) to control sea louse infestations on salmon farms has raised questions about whether sea lice may be able to evolve tolerance of NMMs. Of particular concern is the potential for sea lice to evolve freshwater tolerance as a result of freshwater treatments. Wild trout...
Reducing greenhouse gas emissions of Amazon hydropower with strategic dam planning
Rafael M. Almeida, Qinru Shi, Jonathan M. Gomes-Selman, Xiaojian Wu, Yexiang Xue, Hector Angarita, Nathan Barros, Bruce R. Forsberg, Roosevelt García-Villacorta, Stephen K. Hamilton, John M. Melack, Mariana Montoya, Guillaume Perez, Suresh Sethi, Carla P. Gomes, Alexander S. Flecker
2019, Nature Communications (10)
Hundreds of dams have been proposed throughout the Amazon basin, one of the world’s largest untapped hydropower frontiers. While hydropower is a potentially clean source of renewable energy, some projects produce high greenhouse gas (GHG) emissions per unit electricity generated (carbon intensity). Here we show how...
Local scale spatial patterns of freshwater mussels in the Upper Mississippi River
Patricia Ries, Nathan R. De Jager, Teresa Newton, Steven J. Zigler
2019, Freshwater Science (38) 742-752
Multiple physical and biological factors contribute to the structure of freshwater mussel communities in large rivers. Mussel distributions are frequently described as clumped or patchy. However, few surveys of mussel populations have been designed to quantify these spatial patterns. We used indicators of spatial autocorrelation to quantify spatial patterns of...
Yellowstone grizzly bear investigations: Annual report of the Interagency Grizzly Bear Study Team 2018
Frank T. van Manen, Mark A. Haroldson, Bryn Karabensh, editor(s)
2019, Report
This annual report summarizes the results of grizzly bear (Ursus arctos) research and monitoring conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2018. The research and monitoring program is focused on population estimation and demographics, food monitoring, and habitat monitoring. The report...
Physicochemical controls on zones of higher coral stress where Black Band Disease occurs at Mākua Reef, Kauaʻi, Hawaiʻi
Ferdinand Oberle, Curt D. Storlazzi, Olivia M. Cheriton, Renee K. Takesue, Daniel J. Hoover, Joshua B. Logan, Christina M. Runyon, Christina A. Kellogg, Cordell Johnson, Peter W. Swarzenski
2019, Frontiers in Marine Science (6)
Pervasive and sustained coral diseases contribute to the systemic degradation of reef ecosystems, however, to date an understanding of the physicochemical controls on a coral disease event is still largely lacking. Water circulation and residence times and submarine groundwater discharge all determine the degree to which reef organisms are exposed...
Geologic cross section A–A′ through the Appalachian basin from the southern margin of the Ontario Lowlands province, Genesee County, western New York, to the Valley and Ridge province, Lycoming County, north-central Pennsylvania
Michael H. Trippi, Robert T. Ryder, Catherine B. Enomoto
2019, Scientific Investigations Map 3425
IntroductionGeologic cross section A–A′ is the fifth in a series of cross sections constructed by the U.S. Geological Survey (USGS) to document and improve understanding of the geologic framework and petroleum systems of the Appalachian basin. Cross section A–A′ provides a regional view of the structural and stratigraphic framework of the Appalachian...
Water priorities for the nation—The U.S. Geological Survey next generation water observing system
Sandra M. Eberts, Chad R. Wagner, Michael D. Woodside
2019, Fact Sheet 2019-3046
The challenges of providing safe and sustainable water supplies for human and ecological uses and protecting lives and property during water emergencies are well recognized. The U.S. Geological Survey (USGS) plays an essential role in meeting these challenges through its observational networks and renowned water science and research activities (National...
A framework for quantifying resilience to forest disturbance
Timothy Bryant, Kristen Waring, Meador Sanchez, John B. Bradford
2019, Frontiers in Forests and Global Change (2)
(Bradford) The concept of ecological resilience is an invaluable tool to assess the risk of state transitions and predict the impact of management on an ecosystem’s response to future disturbances. However, resilience is difficult to quantify and the factors contributing to resilience are often unknown in systems subject to multiple...
Factors promoting the recolonization of Oahu, Hawaii, by Bristle-thighed Curlews
T. Lee Tibbitts, Daniel R. Ruthrauff, Jared G. Underwood, Vijay P. Patil
2019, Global Ecology and Conservation (21)
Suitable habitat for Arctic-breeding migratory shorebirds is decreasing at their traditional wintering islands and atolls in the Central Pacific Flyway (i.e., Oceania) due to habitat degradation, reclamation, and sea-level rise. To maintain the size and resiliency of their populations, migratory shorebirds will need to expand their winter ranges by...
Water resources of Lincoln Parish, Louisiana
Vincent E. White
2019, Fact Sheet 2019-3019
Information concerning the availability, use, and quality of water in Lincoln Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. In 2014, about 7.76...
Water resources of Winn Parish, Louisiana
Vincent E. White
2019, Fact Sheet 2019-3022
Information concerning the availability, use, and quality of water in Winn Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. In 2014, about 2.74...
Water resources of Franklin Parish, Louisiana
Vincent E. White
2019, Fact Sheet 2019-3021
Information concerning the availability, use, and quality of water in Franklin Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. In 2014, about 41.79...
Water resources of Madison Parish, Louisiana
Vincent E. White
2019, Fact Sheet 2019-3018
Information concerning the availability, use, and quality of water in Madison Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. In 2014, 50.66 million...
Length-scale-dependent relationships between VS30 and topographic slopes in southern California
Jessica Lin, Seulgi Moon, Alan Yong, Lingseng Meng, Paul Davies
2019, Bulletin of the Seismological Society of America (109) 2614-2625
In engineering seismology, the time‐averaged shear‐wave velocity (VS) of the upper 30 m of the crust (VS30) is the primary parameter used in ground‐motion models to predict seismic site effects. VS30 is typically derived from in situ recordings of VS, although proxy‐based approaches (using geologic and/or geomorphometric...
Anticoagulant rodenticides in Strix owls indicate widespread exposure in west coast forests
David Wiens, Krista E. Dilione, Collin A. Eagles-Smith, Garth Herring, Damon B. Lesmeister, Mourad W. Gabriel, Greta Wengert, David C. Simon
2019, Biological Conservation (238)
Exposure of nontarget wildlife to anticoagulant rodenticides (AR) is a global conservation concern typically centered around urban or agricultural areas. Recently, however, the illegal use of ARs in remote forests of California, USA, has exposed sensitive predators, including the federally threatened northern spotted owl (Strix occidentalis caurina). We used congeneric...
Sediment and organic carbon transport and deposition driven by internal tides along Monterey Canyon, offshore California
Katherine L. Maier, Kurt J. Rosenberger, Charles K. Paull, Roberto Gwiazda, Jenny Gales, Thomas Lorenson, James P. Barry, Peter J. Talling, Mary McGann, Jingping Xu, Eve M. Lundsten, Krystle Anderson, Steven Litvin, Daniel Parsons, Michael Clare, Stephen Simmons, Esther J. Sumner, Matthieu J.B. Cartigny
2019, Deep-Sea Research Part I: Oceanographic Research Papers (153)
Submarine canyons provide globally important conduits for sediment and organic carbon transport into the deep-sea. Using a novel dataset from Monterey Canyon, offshore central California, that includes an extensive array of water column sampling devices, we address how fine-grained sediment and organic carbon are transported, mixed, fractionated, and buried along...
Reporting the limits of detection and quantification for environmental DNA assays
Katy E. Klymus, Christopher M. Merkes, Michael J. Allison, Caren S. Goldberg, Caren C. Helbing, Margaret Hunter, Craig Jackson, Richard F. Lance, Anna M. Mangan, Emy M. Monroe, Antoinette J. Piaggio, Joel P. Stokdyk, Chris C. Wilson, Catherine A. Richter
2019, Environmental DNA (2) 271-282
BackgroundEnvironmental DNA (eDNA) analysis is increasingly being used to detect the presence and relative abundance of rare species, especially invasive or imperiled aquatic species. The rapid progress in the eDNA field has resulted in numerous studies impacting conservation and management actions. However, standardization of eDNA...
Empirical estimation of natural geoelectric hazards
Jeffrey J. Love, Paul A. Bedrosian, Anna Kelbert, Greg M. Lucas
2019, Book chapter, Geomagnetically induced currents from the sun to the power grid
Geoelectric field time series can be estimated by convolving estimates of Earth‐surface impedance, such as those obtained from magnetotelluric survey measurements, with historical records of geomagnetic variation obtained at magnetic observatories. This straightforward procedure permits the mapping of geoelectric field variation during magnetic storms. Statistical analysis of the time series...
Reference intervals for blood-based biochemical analytes of southern Beaufort Sea polar bears
Tricia Fry, Kristen R. Friedrichs, Todd C. Atwood, Colleen G. Duncan, Kristin S. Simac, Tony Goldberg
2019, Conservation Physiology (7)
Accurate reference intervals (RI) for commonly measured blood-based analytes are essential for health monitoring programs. Baseline values for a panel of analytes can be used to monitor physiologic and pathophysiologic processes such as organ function, electrolyte balance, and protein catabolism. Our reference population includes 651 serum samples from polar...
Monitoring plans for Louisiana’s system-wide assessment and monitoring program (SWAMP). Version IV
Scott Hemmerling, Melissa M. Baustian, Harris Bienn, Alyssa Dausman, Alaina Grace, Lauren Grimley, Adrian McInnis, Michael Vingiello, Huy Vu, Shaye Sable, Britt Gentile, Phillip Lafargue, Ann Hijuelos, Sarai Piazza, Camille Stagg, Richard C Raynie, Edward Haywood, Syed Khalid
2019, Report
The System-Wide Assessment and Monitoring Program (SWAMP) has been envisioned as a long-term monitoring program to ensure a comprehensive network of coastal data collection activities is in place to support the development, implementation, and adaptive management of the coastal protection and restoration program within coastal Louisiana. The Coastwide Reference Monitoring...
