UAV-based measurements of spatio-temporal concentration distributions of fluorescent tracers in open channel flows
Donghae Baek, Il Won Seo, Jun Song Kim, Jonathan M. Nelson
2019, Advances in Water Resources (127) 76-88
A new method of unmanned aerial vehicle (UAV)-based tracer tests using RGB (red, green, blue) images was developed in order to acquire the spatio-temporal concentration distribution of tracer clouds in open channel flows. Tracer tests using Rhodamine WT were conducted to collect the RGB images using a commercial digital camera...
Scale‐dependent effects of isolation on seasonal patch colonisation by two Neotropical freshwater fishes
Jerry Penha, Karlo Y. P. Hakamada, James E. Hines, James D. Nichols
2019, Ecology of Freshwater Fish (28) 274-284
The metapopulation paradigm has been central to improve the conservation and management of natural populations. However, despite the large number of studies on metapopulation dynamics, the overall support for the relationships on which the paradigm is based has not been strong. Here, we studied the occupancy dynamics of two Neotropical...
Stream metabolism increases with drainage area and peaks asynchronously across a stream network
Francine H. Mejia, Alexander K. Fremier, Joseph R. Benjamin, J. Ryan Bellmore, Adrianne Z. Grimm, Grace A. Watson, Michael Newsom
2019, Aquatic Sciences (81) 1-17
Quantifying the spatial and temporal dynamics of stream metabolism across stream networks is key to understanding carbon cycling and stream food web ecology. To better understand intra-annual temporal patterns of gross primary production (GPP) and ecosystem respiration (ER) and their variability across space, we continuously measured dissolved oxygen and modeled...
Cryptosporidium incidence and surface water influence of groundwater supplying public water systems in Minnesota, USA
Joel P. Stokdyk, Susan K. Spencer, James F. Walsh, Jane R. de Lambert, Aaron D. Fimstahl, Anita C. Anderson, Lih-in W. Rezania, Mark A. Borchardt
2019, Environmental Science & Technology (23) 3391-3398
Regulations for public water systems (PWS) in the U.S. consider Cryptosporidium a microbial contaminant of surface water supplies. Ground- water is assumed free of Cryptosporidium unless surface water is entering supply wells. We determined the incidence of Cryptosporidium in PWS wells varying in surface water influence. Community and noncommunity PWS...
Hydraulic conductivity estimates from slug tests in the Big Sioux aquifer near Sioux Falls, South Dakota
William G. Eldridge, Colton J. Medler
2019, Scientific Investigations Report 2019-5013
Hydraulic conductivity estimates were made for 15 observation wells using slug-out (rising-head) tests in the Big Sioux aquifer near Sioux Falls, South Dakota, as part of a cooperative study with the City of Sioux Falls to characterize the hydrogeology and the extent of the Big Sioux aquifer north of the...
Extreme reduction in nutritional value of a key forage fish during the Pacific marine heatwave of 2014–2016
Vanessa R. von Biela, Mayumi L. Arimitsu, John F. Piatt, Brielle Heflin, Sarah K. Schoen, Jannelle Trowbridge, Chelsea Clawson
2019, Marine Ecology Progress Series (613) 171-182
Pacific sand lance Ammodytes personatus are a key forage fish in the North Pacific for many species of salmon, groundfish, seabirds, and marine mammals and have historically been important to predators in relatively warm years. However, extreme declines in the nutritional value of sand lance in Prince William Sound, Alaska, USA,...
Downstream‐propagating channel responses to decadal‐scale climate variability in a glaciated river basin
Scott W. Anderson, Christopher P. Konrad
2019, Journal of Geophysical Research: Earth Surface (124) 902-919
Regional climate is an important control on the rate of coarse sediment mobilization and transport in alpine river systems. Changes in climate are then expected to cause a cascade of geomorphic responses, including adjustments in downstream channel morphology. However, the mechanics and sensitivity of channel response to short‐term climate variability...
Defining the limits of spectrally based bathymetric mapping on a large river
Carl J. Legleiter, Ryan L. Fosness
2019, Remote Sensing (11) 1-29
Remote sensing has emerged as a powerful method of characterizing river systems but is subject to several important limitations. This study focused on defining the limits of spectrally based mapping in a large river. We used multibeam echosounder (MBES) surveys and hyperspectral images from a deep, clear-flowing channel to develop...
Regression models for estimating sediment and nutrient concentrations and loads at the Kankakee River, Shelby, Indiana, December 2015 through May 2018
Timothy R. Lathrop, Aubrey R. Bunch, Myles S. Downhour
2019, Scientific Investigations Report 2019-5005
The Kankakee River in northern Indiana flows through the area once known as the Grand Marsh. Beginning in the 1860s, anthropogenic changes to the river within Indiana resulted in downstream flooding and additional transport of sediment and nutrients. In 2015, the U.S. Geological Survey, in cooperation with the Indiana Department...
Better approaches to managing drought in the American Southwest
Patrick Lambert, Timothy N. Titus, Andrea Ostroff
2019, Eos, Transactions, American Geophysical Union (100)
The second in a series of USGS Southwest Region (SWR) “Science Exchange” annual workshops, focused on USGS drought science. The participants considered how extreme drought conditions are evolving in much of the American southwest, with an emphasis on integrated drought science planning at the USGS bureau and program levels. The...
User’s manual for the Draper climate-distribution software suite with data‑evaluation tools
John M. Donovan, Kathryn M. Koczot
2019, Techniques and Methods 7-C22
Development of a time series of spatially distributed climate data is an important step in the process of developing physically based environmental models requiring distributed inputs of climate data beyond what is available from observations collected at climate stations. To prepare inputs required for model-mapping units across the study area,...
100-kyr paced climate change in the Pliocene warm period, Southwest Pacific
Rocio Caballero-Gill, Timothy D. Herbert, Harry Dowsett
2019, Paleoceanography and Paleoclimatology (34) 524-525
The mid to late Pliocene (~4.2-2.8 Ma.) represents an experiment in climate sensitivity to orbital pacing in which nearly all continental ice was confined to the Southern Hemisphere. Most studies have emphasized the dominant role of obliquity in determining changes in ice volume and temperature at this time, although most records come from the...
Environmental regulation of sex determination in fishes: Insights from Atheriniformes
Y. Yamamoto, R. S. Hattori, Reynaldo Patino, C. A. Strüssmann
2019, Book chapter
Sex determination is the first step toward the establishment of phenotypic sex in most vertebrates. Aquatic poikilotherms such as teleost fishes exhibit a high diversity of sex-determination mechanisms and gonadal phenotypes that are remarkably plastic and responsive to a variety of environmental factors (e.g., water temperature, pH, salinity, photoperiod, population density)....
Growth disparity in sympatric kokanee breeding groups
Zachary B. Klein, Michael C. Quist, Andrew M. Dux, Matthew P. Corsi
2019, North American Journal of Aquaculture (81) 169-177
Growth is arguably the most important dynamic rate function due to its interaction with survival and recruitment. As such, understanding the mechanisms underlying growth is a primary focus of fisheries research. Kokanee Oncorhynchus nerka in Lake Pend Oreille, Idaho, provide an interesting case study for investigating the factors that influence growth. Early‐run...
Estimating the energy expenditure of free‐ranging polar bears using tri‐axial accelerometers: A validation with doubly labeled water
Anthony M. Pagano, Terrie M. Williams
2019, Ecology and Evolution (9) 4210-4219
Measures of energy expenditure can be used to inform animal conservation and management, but methods for measuring the energy expenditure of free‐ranging animals have a variety of limitations. Advancements in biologging technologies have enabled the use of dynamic body acceleration derived from accelerometers as a proxy for energy expenditure. Although...
Discovery of an extensive deep-sea fossil serpulid reef associated with a cold seep, Santa Monica Basin, California
Magdalena N Georgieva, Charles K. Paull, Crispin TS Little, Mary McGann, Diana Sahy, Daniel Condon, Lonny Lundsten, Jack Pewsey, David W Caress, Robert C Vrijenhoek
2019, Frontiers in Marine Science
Multi-beam mapping of the Santa Monica Basin in the eastern Pacific has revealed the existence of a number of elevated bathymetric features, or mounds, harboring cold seep communities. During 2013-2014, mounds at ~600 m water depth were observed for the first time and sampled by Monterey Bay Aquarium Research Institute’s...
Quality of surface water in Missouri, water year 2017
Miya N. Barr, Katherine A. Bartels
2019, Data Series 1108
The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, designed and operates a network of monitoring stations on streams and springs throughout Missouri known as the Ambient Water-Quality Monitoring Network. During water year 2017 (October 1, 2016, through September 30, 2017), data presented in this report...
Relationships between diatom metrics based on species nutrient traits and agricultural land use
Robert Pillsbury, R. Jan Stevenson, Mark D. Munn, Ian R. Waite
2019, Environmental Monitoring and Assessment (191)
We assessed how diatom metrics were related to different ranges of agricultural land use. Diatom assemblage composition, nutrients, and landscape characteristics were determined at 232 sites in eight agriculturally dominated study areas of the continental United States. Two regional groups based on differences in diatom relations to human disturbance were...
Integrated assessment of wastewater reuse, exposure risk, and fish endocrine disruption in the Shenandoah River watershed
Larry B. Barber, Jennifer L. Krstolic, Chintamani Kandel, Steffanie H. Keefe, Jacelyn Rice, Paul Westerhoff, David Bertolatus, Alan M. Vajda
2019, Environmental Science & Technology (53) 3429-3440
Reuse of municipal and industrial wastewater treatment plant (WWTP) effluent is an important component in augmenting global freshwater supplies. The Shenandoah River Watershed was selected to conduct on-site exposure experiments to assess endocrine disrupting characteristics of different source waters. This investigation of the Shenandoah River Watershed integrates WWTP wastewater reuse...
Assessing ecological infrastructure investments
Vic Adamowicz, Laura Calderon-Etter, Alicia Entem, Eli P. Fenichel, Jefferson S. Hall, Patrick Lloyd-Smith, Fred L. Ogden, Mani Rouhi Rad, Jason A. Regina, Robert Stallard
2019, Proceedings of the National Academy of Sciences (116) 5254-5261
Conventional markets can underprovide ecosystem services. Deliberate creation of a market for ecosystem services [e.g., a payments for ecosystem services (PES) scheme] can close the gap. The new ecosystem service market alters behaviors and quantities of ecosystem service provided and reveals prices for the ecosystems service:...
The Missouri groundwater-level observation network
David C. Smith
2019, Fact Sheet 2019-3009
The Missouri groundwater-level observation well network is a series of wells across the State of Missouri in which groundwater levels are monitored in real time and periodically. The wells monitor the water levels in multiple key aquifers, such as the Ozark aquifer in the Salem and Springfield Plateaus and the...
Wind erosion and dust from US drylands: a review of causes, consequences, and solutions in a changing world
Michael C. Duniway, Alix A. Pfennigwerth, Stephen E. Fick, Travis W. Nauman, Jayne Belnap, Nichole N. Barger
2019, Ecosphere (10) 1-28
Erosion by wind is one of the principal processes associated with land degradation in drylands and is a significant concern to land managers and policymakers globally. In the drylands of North America, millions of tons of soil are lost to wind erosion annually. Of the 60 million ha in the United...
Biogeochemical and physical processes controlling mercury methylation and bioaccumulation in Lake Powell, Glen Canyon National Recreation Area, Utah and Arizona, 2014 and 2015
David L. Naftz, Mark Marvin-DiPasquale, David P. Krabbenhoft, George Aiken, Eric S. Boyd, Christopher H. Conaway, Jacob M. Ogorek, Gregory M. Anderson
2019, Open-File Report 2018-1159
Mercury monitoring results from about 300 Morone saxatilis (striped bass) muscle tissue samples collected by the State of Utah from Lake Powell resulted in a Utah/Arizona fish consumption advisory issued in 2012 for approximately the lower 100 kilometers of the reservoir. Chemical, physical, and biological data were collected during two...
Habitat rehabilitation in the Detroit River area of concern
John Hartig, Claire Sanders, Richard Wyma, James C. Boase, Edward Roseman
2019, Aquatic Ecosystem Health & Management (21) 458-169
Loss and degradation of fish and wildlife habitat is a long-standing issue in the Detroit River. The Detroit River Remedial Action Plan helped agencies and stakeholder groups reach agreement on impaired beneficial uses, including loss of fish and wildlife habitat, and helped mobilize all stakeholders to rehabilitate habitat....
Time-domain electromagnetic soundings for the delineation of saline groundwater in the Genesee River Valley, Western New York, 2016-2017
John H. Williams, William M. Kappel, Carole D. Johnson, Eric A. White, Paul M. Heisig, J. W. Lane
2019, Conference Paper, 32nd symposium on the application of geophysics to engineering and environmental problems, SAGEEP 2019
The U.S. Geological Survey, in cooperation with the New York State Department of Environmental Conservation, is investigating the distribution of saline groundwater in the Genesee River Valley near the former Retsof salt mine (fig. 1). As part of this study, paired time-domain electromagnetic (TEM) soundings and horizontal-to-vertical...
