Ethanol and sodium acetate as a preservation method to delay degradation of environmental DNA
Bridget A. Ladell, Liza R. Walleser, S. Grace McCalla, Richard A. Erickson, Jon Amberg
2019, Conservation Genetics Resources (11) 83-88
Environmental DNA (eDNA) samples that are collected from remote locations depend on rapid stabilization of the DNA. The degradation of eDNA in water samples is minimized when samples are stored at ≤ 4 °C. Developing a preservation technique to maintain eDNA integrity at room temperature would allow a wider range of locations...
Nitrogen cycling in large temperate floodplain rivers of contrasting nutrient regimes and management
William B. Richardson, Lynn A. Bartsch, Michelle Bartsch, Richard L. Kiesling, Brenda Mroska-LaFrancois
2019, River Research and Applications (35) 529-539
Hydraulic connection between channels and floodplains (“connectivity”) is a fundamental determinant of ecosystem function in large floodplain rivers. Factors controlling material processing in these rivers depend not only on the degree of connectivity but also on the sediment conditions, nutrient loads, and source. Nutrient cycling in the nutrient‐rich upper Mississippi...
A new indicator framework for quantifying the intensity of the terrestrialwater cycle
Thomas G. Huntington, Peter Weiskel, David M. Wolock, Gregory J. McCabe
2019, Journal of Hydrology (559) 361-372
A quantitative framework for characterizing the intensity of the water cycle over land is presented, and illustrated using a spatially distributed water-balance model of the conterminous United States (CONUS). We approach water cycle intensity (WCI) from a landscape perspective; WCI is defined as the sum of precipitation (P) and actual...
The influence of land-cover changes on the variability of saturated hydraulic conductivity in tropical peatlands
James T. Peterson, Sofyan Kurnianto, John S. Selker, Daniel Murdiyarso, J. Boone Kauffman
2019, Mitigation and Adaption Strategies for Global Change (24) 535-555
Understanding the movement of water through peat is essential for effective conservation and management strategies for peatlands. Saturated hydraulic conductivity, Ks, describes water movement through the peat profile. However, the spatial variability of Ks in tropical peatlands and the effects of land conversion on peat characteristics are poorly understood....
Long-term assessment of ichthyoplankton in a large North American river system reveals changes in fish community dynamics
Taaja R. Tucker, Edward F. Roseman, Robin L. DeBruyne, Jeremy J. Pritt, David Bennion, Darryl W. Hondorp, James C. Boase
2019, Canadian Journal of Fisheries and Aquatic Sciences (75) 2255-2270
Larval fishes are sensitive to abiotic conditions and provide a direct measure of spawning success. The St. Clair – Detroit River System, a Laurentian Great Lakes connecting channel with a history of environmental degradation, has undergone improvements in habitat and water quality since the 1970s. We compared 2006–2015 ichthyoplankton community...
Non-anthropogenic diet-based oiling of predatory birds
Todd E. Katzner, Daniel Driscoll, Ronald E. Jackman, Peter Bloom, Scott Thomas, Jeff Cooper, Stephen J. Livingstone, Teryl Grubb, Jacqueline M. Doyle, Douglas A. Bell, Joseph Didonato, J. Andrew DeWoody
2019, Journal of Raptor Research (52) 82-88
Oiling of wildlife can have important consequences to individual animals and populations (Kingston 2002). Individual birds that are heavily oiled lose their ability to fly and may become ill or die from hypothermia, starvation, exhaustion, or drowning (Clark 1984, Rocke 1999). For example, large-scale oiling from the Exxon Valdez spill...
Bright carbonate surfaces on Ceres as remnants of salt-rich water fountains
Ottavian Ruesch, Lynnae Quick, Margaret Evelyn Landis, M.M. Sori, O. Cadek, P. Broz, K.A. Otto, Michael T. Bland, S. Byrne, J.C. Castillo-Rogez, H. Hiesinger, R. Jaumann, K. Krohn, L.A. McFadden, A. Nathues, A. Neesemann, F. Preusker, T. Roatsch, P.M. Schenk, J. E. C. Scully, M.V. Sykes, D.A. Williams, C.A. Raymond, C.T. Russell.
2019, Icarus (320) 39-48
Vinalia and Cerealia Faculae are bright and salt-rich localized areas in Occator crater on Ceres. The predominance of the near-infrared signature of sodium carbonate on these surfaces suggests their original material was a brine. Here we analyze Dawn Framing Camera's images and characterize the surfaces as composed of a central...
Hydrogeologic controls and geochemical indicators of groundwater movement in the Niles Cone and southern East Bay Plain groundwater subbasins, Alameda County, California
Nicholas F. Teague, John A. Izbicki, Jim Borchers, Justin T. Kulongoski, Bryant C. Jurgens
2019, Scientific Investigations Report 2018-5003
Beginning in the 1970s, Alameda County Water District began infiltrating imported water through ponds in repurposed gravel quarries at the Quarry Lakes Regional Park, in the Niles Cone groundwater subbasin, to recharge groundwater and to minimize intrusion of saline, San Francisco Bay water into freshwater aquifers. Hydraulic connection between distinct...
Stream mercury export in response to contemporary timber harvesting methods (Pacific Coastal Mountains, Oregon, USA)
Chris S. Eckley, Collin A. Eagles-Smith, Michael T. Tate, Brandon M Kowalski, Robert Danehy, Sherri L Johnson, David P. Krabbenhoft
2019, Environmental Science & Technology (52) 1971-1980
Land-use activities can alter hydrological and biogeochemical processes that can affect the fate, transformation, and transport of mercury (Hg). Previous studies in boreal forests have shown that forestry operations can have profound, but variable effects on Hg export and methylmercury (MeHg) formation. The Pacific Northwest is an important...
Direct and indirect effects of tides on ecosystem-scale CO2 exchange in a brackish tidal marsh in Northern California
Sara Knox, Lisamarie Windham-Myers, Frank Anderson, Cove Sturtevant, Brian A. Bergamaschi
2019, Journal of Geophysical Research: Biogeosciences (123) 787-806
We investigated the direct and indirect influence of tides on net ecosystem exchange (NEE) of carbon dioxide (CO2) in a temperate brackish tidal marsh. NEE displayed a tidally driven pattern with obvious characteristics at the multiday scale, with greater net CO2uptake during spring tides than neap tides. Based on the...
Isotopic evidence that nitrogen enrichment intensifies nitrogen losses to the atmosphere from subtropical mangroves
Carla Roberta Goncalves Reis, Sasha C. Reed, Rafael Silva Oliveira, Gabriela Bielefeld Nardoto
2019, Ecosystems (22) 1126-1144
Nitrogen (N) enrichment can have large effects on mangroves’ capacity to provide critical ecosystem services by affecting fundamental functions such as N cycling and primary productivity. However, our understanding of excess N input effects on N cycling in mangroves remains quite limited. To advance our understanding of how N enrichment...
Understanding the genetic characteristics of Wild Brook Trout populations in North Carolina thanks to the guidance of Dr. Tim King
David C. Kazyak, Barbara A. Lubinski, Jacob M Rash, Tim L. King
2019, Conference Paper, Proceedings of the Wild Trout XII Symposium
We genotyped 7,588 brook trout representing 406 collections from across the State of North Carolina (Figure 1) at 12 microsatellite loci (King et al. 2012). The vast majority ofcollections appeared to represent single populations, based on general conformance to HardyWeinberg equilibrium and limited evidence for linkage-disequilibrium. Allelic diversity was low to moderate...
Fena Valley Reservoir watershed and water-balance model updates and expansion of watershed modeling to southern Guam
Sarah N. Rosa, Lauren E. Hay
2019, Scientific Investigations Report 2017-5093
In 2014, the U.S. Geological Survey, in cooperation with the U.S. Department of Defense’s Strategic Environmental Research and Development Program, initiated a project to evaluate the potential impacts of projected climate-change on Department of Defense installations that rely on Guam’s water resources. A major task of that project was to...
The impact of late Holocene land-use change, climate variability, and sea-level rise on carbon storage in tidal freshwater wetlands on the southeastern United States Coastal Plain
Miriam Jones, Christopher E. Bernhardt, K. W. Krauss, Gregory E. Noe
2019, Journal of Geophysical Research: Biogeosciences (122) 3126-3141
This study examines Holocene impacts of changes in climate, land use, and sea-level rise (SLR) on sediment accretion, carbon accumulation rates (CAR), and vegetation along a transect of tidal freshwater forested wetlands (TFFW) to oligohaline marsh along the Waccamaw River, South Carolina (4 sites) and along the Savannah River, Georgia...
The role of baseflow in dissolved solids delivery to streams in the Upper Colorado River Basin
Christine Rumsey, Matthew P. Miller, Gregory E. Schwarz, Robert M. Hirsch, David D. Susong
Gregory Schwarz, Robert M. Hirsch, David Susong, editor(s)
2019, Hydrological Processes (31) 4705-4718
Salinity has a major effect on water users in the Colorado River Basin, estimated to cause almost $300 million per year in economic damages. The Colorado River Basin Salinity Control Program implements and manages projects to reduce salinity loads, investing millions of dollars per year in irrigation...
Nominal 30-m cropland extent map of continental Africa by integrating pixel-based and object-based algorithms using Sentinel-2 and Landsat-8 Data on Google Earth Engine
Jun Xiong, Prasad S. Thenkabail, James C. Tilton, Murali Krishna Gumma, Pardhasaradhi G. Teluguntla, Adam Oliphant, Russell G. Congalton, Kamini Yadav, Noel Gorelick
2019, Remote Sensing (9)
A satellite-derived cropland extent map at high spatial resolution (30-m or better) is a must for food and water security analysis. Precise and accurate global cropland extent maps, indicating cropland and non-cropland areas, are starting points to develop higher-level products such as crop watering methods (irrigated or rainfed), cropping intensities...
Avian predation on juvenile Salmonids: Spatial and temporal analysis based on acoustic and passive integrated transponder tags
Allen F. Evans, Quinn Payton, Aaron Turecek, Bradley D. Cramer, Ken Collis, Daniel D. Roby, Peter J. Loschl, Leah Sullivan, Skalski John, Mark Weiland, Curtis Dotson
2019, Transactions of the American Fisheries Society
We evaluated the impact of predation on juvenile steelhead Oncorhynchus mykiss and yearling and subyearling Chinook Salmon O. tshawytscha by piscivorous waterbirds from 11 different breeding colonies in the Columbia River basin during 2012 and 2014. Fish were tagged with both acoustic tags and PIT tags and were tracked via a network of hydrophone...
Organic geochemistry and toxicology of a stream impacted by unconventional oil and gas wastewater disposal operations
William H. Orem, Matthew S. Varonka, Lynn M. Crosby, Karl B. Haase, Keith A. Loftin, Michelle L. Hladik, Denise M. Akob, Calin Tatu, Adam C. Mumford, Jeanne B. Jaeschke, Anne L. Bates, Tiffani Schell, Isabelle M. Cozzarelli
2019, Applied Geochemistry (80) 155-167
Water and sediment extracts samples were analyzed for extractable hydrocarbons by gas chromatography/mass spectrometry (GC/MS) using an Agilent (Agilent Technologies, Palo Alto, CA, USA) 7890 series GC and 5975 electron ionization (EI) mass selective detector (MSD) operated in scan mode. Agilent ChemStation software was used for data acquisition and analysis...
Evidence for conservative transport of dissolved organic carbon in major river basins in the Gulf of Maine Watershed
Thomas G. Huntington, Collin S. Roesler, George R. Aiken
2019, Journal of Hydrology (573) 755-767
Transport and fate of dissolved organic carbon (DOC) in rivers are important aspects of the carbon cycle and the critical linkage between terrestrial, aquatic, and marine systems. Recent studies have quantified fluvial export to the marine environment in many systems, but in-stream losses of DOC are poorly constrained. This study...
Sturgeon in the Sacramento-San Joaquin watershed: new insights to support conservation and management
A Peter Klimley, Eric D Chapman, J. J. Cech Jr, Dennis E. Cocherell, Nann A. Fangue, Marty Gingras, Zachary Jackson, Emily A Miller, Ethan A. Mora, Jamilynn B Poletto, Andrea M Schreier, Alicia Seesholtz, Kenneth J. Sulak, Michael J. Thomas, David J.A. Woodbury, Megan T. Wyman
2019, San Francisco Estuary and Watershed Science (13) 1-19
The goal of a day-long symposium on March 3, 2015, Sturgeon in the Sacramento–San Joaquin Watershed: New Insights to Support Conservation and Management, was to present new information about the physiology, behavior, and ecology of the green (Acipenser medirostris) and white sturgeon (Acipenser transmontanus) to help guide enhanced management and...
Species occurrence data for the nation
Water Resources Division, U.S. Geological Survey
2019, Fact Sheet 2015-3068
USGS Biodiversity Information Serving Our Nation (BISON) is a unique, web-based Federal mapping resource for species occurrence data in the United States and its Territories.BISON’s size is unprecedented, including records for most living species found in the United States and encompassing the efforts of more than a million professional and...
Chapter A6.3. Specific Conductance
U.S. Geological Survey
2019, Techniques and Methods 9-A6.3
The “National Field Manual for the Collection of Water-Quality Data” (NFM) provides guidelines and procedures for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation’s surface-water and groundwater resources. This chapter, NFM A6.3, provides guidance and protocols for the measurement of specific conductance...
Establishment of a vertical control network along the St. Croix River in New Brunswick and Maine
Pamela J. Lombard
2019, Open-File Report 2013-1236
Consistent elevations at stable benchmarks, referenced to a common datum, are important for measuring and comparing water levels and for computing flows throughout a watershed. Elevations are presented for 38 control points within the St. Croix River watershed, mostly along the main stem of the St. Croix River. Vertical control...
Shear-wave seismic reflection studies of unconsolidated sediments in the near surface
Karl J. Ellefsen, Seth S. Haines
2019, Geophysics (75) B59-B66
We have successfully applied of SH-wave seismic reflection methods to two different near-surface problems targeting unconsolidated sediments. At the former Fort Ord, where the water table is approximately 30m deep, we imaged aeolian and marine aquifer and aquitard stratigraphy to a depth of approximately 80m. We identified reflections from sand/clay...
Analysis of groundwater response to tidal fluctuations, Operable Unit 1, Naval Base Kitsap, Keyport, Washington
Chad C. Opatz, Richard S. Dinicola
2019, Open-File Report 2019-1098
Chlorinated volatile organic compounds have affected groundwater beneath a former 9-acre landfill at Operable Unit 1 (OU 1) of Naval Base Kitsap (NBK) Keyport, in Keyport, Washington. The landfill was the primary disposal area for domestic and industrial waste generated by NBK Keyport from the 1930s through 1973. Naval Facilities...
