Reproductive output and clutch phenology of female Agassiz's desert tortoises (Gopherus agassizii) in the Sonoran Desert region of Joshua Tree National Park
Jeffrey E. Lovich, Shellie R. Puffer, Mickey Agha, Joshua R. Ennen, Kathie Meyer-Wilkins, Laura A. Tennant, Amanda L Smith, Terence R. Arundel, Kathleen D. Brundige, Michael S. Vamstad
2018, Current Herpetology (37) 40-57
Agassiz's desert tortoise (Gopherus agassizii) reaches the southern edge of its range in the Sonoran Desert of California. The reproductive ecology of this wideranging species is understudied here compared to populations in the adjacent Mojave Desert. Understanding potential geographic variation in reproductive ecology is important for effective management of conservation-reliant...
A surrogate regression approach for computing continuous loads for the tributary nutrient and sediment monitoring program on the Great Lakes
Dale M. Robertson, Laura E. Hubbard, David L. Lorenz, Daniel J. Sullivan
2018, Journal of Great Lakes Research (44) 26-42
Water quality (WQ) in many Great Lake tributaries has been degraded (increased nutrient and sediment concentrations) due to changes in their watersheds, resulting in downstream eutrophication. As part of the Great Lakes Water Quality Agreement, specific goals were established for loading of specific constituents (e.g., phosphorus)....
High‐elevation evapotranspiration estimates during drought: Using streamflow and NASA Airborne Snow Observatory SWE observations to vlose the upper Tuolumne River Basin eater balance
Brian Henn, Thomas H. Painter, Kathryn J. Bormann, Bruce McGurk, Alan L. Flint, Lorraine E. Flint, Vince White, Jessica D. Lundquist
2018, Water Resources Research (54) 746-766
Hydrologic variables such as evapotranspiration (ET) and soil water storage are difficult to observe across spatial scales in complex terrain. Streamflow and lidar‐derived snow observations provide information about distributed hydrologic processes such as snowmelt, infiltration, and storage. We use a distributed streamflow data set across eight basins in the upper...
Monitoring global tree mortality patterns and trends. Report from the VW symposium ‘Crossing scales and disciplines to identify global trends of tree mortality as indicators of forest health’
Henrik Hartmann, Bernhard Schuldt, Tanja G. M. Sanders, Cate Macinnis-Ng, Hans Juergen Boehmer, Craig D. Allen, Andreas Bolte, Thomas W. Crowther, Matthew C. Hansen, Belinda E. Medlyn, Nadine K. Ruehr, William R. L. Anderegg
2018, New Phytologist (217) 948-987
From the 21stto the 23rdJune 2017, the Herrenhausen castle inHannover/Germany hosted a diverse and large crowd with morethan 70 tree physiologists, forest ecologists, forest inventoryexperts, remote-sensing scientists, and vegetation modele rs. Par-ticipants from six continent s and from more...
Increasing chloride in rivers of the conterminous U.S. and linkages to potential corrosivity and lead action level exceedances in drinking water
Edward G. Stets, Casey J. Lee, Darren A. Lytle, Michael R. Schock
2018, Science of the Total Environment (613-614) 1498-1509
Corrosion in water-distribution systems is a costly problem and controlling corrosion is a primary focus of efforts to reduce lead (Pb) and copper (Cu) in tap water. High chloride concentrations can increase the tendency of water to cause corrosion in distribution systems. The effects of chloride are also expressed in several indices commonly used...
Wind River Subbasin Restoration, Annual report of U.S. Geological Survey activities, January 2016 through December 2016
Ian G. Jezorek, Patrick J. Connolly
2018, Report
We used Passive Integrated Transponder (PIT)-tagging and a series of instream PIT-tag interrogation systems (PTISs) to investigate life-histories, populations, and efficacy of habitat restoration actions for steelhead Oncorhynchus mykiss in the Wind River subbasin, WA. Our tagging focused on parr in headwaters areas of the subbasin and our instream readers...
Den phenology and reproductive success of polar bears in a changing climate
Karyn D. Rode, Jay Olson, Dennis L. Eggett, David C. Douglas, George M. Durner, Todd C. Atwood, Eric V. Regehr, Ryan H. Wilson, Tom Smith, Michelle St. Martin
2018, Journal of Mammalogy (99) 16-26
Synchrony between reproduction and food availability is important in mammals due to the high energetic costs of gestation and lactation. Female polar bears (Ursus maritimus) must accumulate sufficient energy reserves during spring through autumn to produce and nurse cubs during the winter months in snow dens. Adequate time in a...
Poroelastic stress changes associated with primary oil production in the Los Angeles Basin, California
Susan E. Hough, Roger G. Bilham
2018, The Leading Edge (37) 108-116
While recent investigations of induced earthquakes have focused on earthquakes associated with wastewater injection and unconventional recovery methods, the potential for earthquakes to be induced by primary production has long been recognized. We use boundary element methods to quantify the predicted geometry and amplitude of stress and strain changes associated...
Mass addition at Mount St. Helens, Washington, inferred from repeated gravity surveys
Maurizio Battaglia, Michael Lisowski, Daniel Dzurisin, Michael P. Poland, Steve Schilling, Angela K. Diefenbach, Jeff Wynn
2018, Journal of Geophysical Research B: Solid Earth (123) 1856-1874
Measurements of subtle changes in the Earth’s gravityfield can provideinformation on the addition/loss of mass (e.g., magma or aqueousfluids) beneath a volcano. In this study, wemeasured gravity at Mount St. Helens from 2010 to 2016 to investigate possible mass changes followingthe 2004–2008 dome-forming eruption. The raw gravity measurements were corrected...
Bathymetry of Ashokan, Cannonsville, Neversink, Pepacton, Rondout, and Schoharie Reservoirs, New York, 2013–15
Elizabeth A. Nystrom
2018, Scientific Investigations Report 2017-5064
Drinking water for New York City is supplied from several large reservoirs, including a system of reservoirs west of the Hudson River. To provide updated reservoir capacity tables and bathymetry maps of the City’s six West of Hudson reservoirs, bathymetric surveys were conducted by the U.S. Geological Survey from 2013...
Evaluating the “Gradual Entrainment Lake Inverter” (GELI) artificial mixing technology for lake and reservoir management
Colin A Smith, Jordan Read, M Jake Vander Zanden
2018, Land and Reservoir Management (34) 232-243
Thermal stratification is important to the structure and function of lake and reservoir ecosystems. Yet when lakes undergo eutrophication, thermal stratification can exacerbate water quality problems. As a result, lake management has sometimes involved artificial mixing and destratification, though the available technologies are few and costly. It...
Fine-scale heterogeneity drives forest use by spring migrant landbirds across a broad, contiguous forest matrix
Theodore J. Zenzal Jr., Robert J. Smith, David N. Ewert, Robert H. Diehl, Jeffrey J. Buler
2018, Ornithological Applications (120) 166-184
Much of our understanding of en route landbird habitat use comes from research performed at local scales, ignoring effects at larger spatial scales. We used a multiscale approach to investigate stopover habitat use by landbirds using transect surveys in 68 forested sites in southwestern Michigan, USA, during the springs...
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...
“Naturalness” in designated Wilderness: Long-term changes in non-native plant dynamics on campsites, Boundary Waters, Minnesota
Holly Eagleston, Jeffrey L. Marion
2018, Forest Science (64) 50-56
Wilderness areas in the United States are preserved for their untrammeled naturalness and opportunities for unconfined recreation. The Boundary Waters Canoe Area Wilderness has these qualities, but long-term recreation visitation pressures on campsites can cause significant ecological changes. This article explores changes on campsites, specifically examining non-native plant ecology over...
Preparing for an uncertain future: Migrating shorebird response to past climatic fluctuations in the Prairie Potholes
Valerie A. Steen, Susan K. Skagen, Barry R. Noon
2018, Ecosphere (9) 1-12
The Prairie Pothole Region, situated in the northern Great Plains, provides important stopover habitat for migratory shorebirds. During spring migration in the U.S. Prairie Potholes, 7.3 million shorebirds refuel in the region's myriad small, freshwater wetlands. Shorebirds use mudflats, shorelines, and ephemeral wetlands that are far more abundant in wet years...
Monitoring algal blooms in drinking water reservoirs using the Landsat-8 Operational Land Imager
Darryl Keith, Jennifer Rover, Jason Green, Brian Zalewsky, Mike Charpentier, Glen Hursby, Joseph Bishop
2018, International Journal of Remote Sensing (39) 2818-2846
In this study, we demonstrated that the Landsat-8 Operational Land Imager (OLI) sensor is a powerful tool that can provide periodic and system-wide information on the condition of drinking water reservoirs. The OLI is a multispectral radiometer (30 m spatial resolution) that allows ecosystem observations at spatial and temporal scales that...
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...
Examining fluvial fish range loss with SDMs
Andrew T. Taylor, Monica Papes, James M. Long
2018, Conservation Biology (32) 171-182
Fluvial fishes face increased imperilment from anthropogenic activities, but the specific factors contributing most to range declines are often poorly understood. For example, the range of the fluvial‐specialist shoal bass (Micropterus cataractae) continues to decrease, yet how perceived threats have contributed to range loss is largely unknown. We used species...
Sirenian life history
Robert K. Bonde
2018, Book chapter, Encyclopedia of marine mammals
Sirenians, including the manatees and dugongs, are large herbivorous mammals that have evolved to an aquatic form since the Eocene epoch. Sirenians have unique adaptations, including dense bone for ballast and a longitudinal hemidiaphragm separating paired lungs (which aid in maintaining a horizontal posture in the water column), species-specific rostral...
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...
Assessing intrinsic and specific vulnerability models ability to indicate groundwater vulnerability to groups of similar pesticides: A comparative study
Steven H. Douglas, Barnali Dixon, Dale W. Griffin
2018, Physical Geography (39) 487-505
With continued population growth and increasing use of fresh groundwater resources, protection of this valuable resource is critical. A cost effective means to assess risk of groundwater contamination potential will provide a useful tool to protect these resources. Integrating geospatial methods offers a means to quantify the risk of contaminant...
Book Review: And then there were none: The demise of Desert Bighorn Sheep in the Pusch Ridge Wilderness
James W. Cain III
2018, Journal of Wildlife Management (82) 475-476
And Then There Were None: The Demise of Desert Bighorn Sheep in the Pusch Ridge Wilderness. Paul R.Krausman. 2017. The University of New Mexico Press, Albuquerque, New Mexico, USA. 248 pp. $65.00 hardcover. ISBN 978‐0‐8263‐5785‐4....
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...
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,...
Use of real-time dust monitoring and surface condition to evaluate success of unpaved road treatments
Bethany K. Kunz, Nicholas S. Green, Janice L. Albers, Mark L. Wildhaber, Edward E. Little
2018, Conference Paper, Transportation Research Board Annual Meeting
No abstract available....
