An introduced breeding population of Chrysemys picta marginata in the Kaibab National Forest, northern Arizona
Jeffrey E. Lovich, Bruce L. Christman, Kristy L. Cummings, Jenna Norris, Shellie R. Puffer, Christina Jones
2019, Current Herpetology (38) 91-98
The painted turtle (Chrysemys picta) is widely distributed from coast to coast in North America with each of four subspecies generally occupying different regions. In the southwestern USA and northern Mexico, where C. p. bellii is the expected native race, populations are small and widelyscattered. Introduced populations of other painted turtle subspecies...
Flood-inundation maps for Lake Champlain in Vermont and New York
Robert H. Flynn, Laura Hayes
2019, Scientific Investigations Report 2018-5169
In 2016, digital flood-inundation maps along the shoreline of Lake Champlain in Addison, Chittenden, Franklin, and Grand Isle Counties in Vermont and northern Clinton County in New York were created by the U.S. Geological Survey (USGS) in cooperation with the International Joint Commission (IJC). This report discusses the creation of...
Coastal habitat change and marine megafauna behavior: Florida manatees encountering reduced food provisions in a prominent winter refuge
Chanda J. Littles, Robert K. Bonde, Susan M. Butler, Charles A. Jacoby, Sky K. Notestein, James P. Reid, Daniel H. Slone, Thomas K. Frazer
2019, Endangered Species Research (38) 29-43
A decline in submerged aquatic vegetation (SAV) within Florida’s spring-fed thermal refuges raises questions about how these systems support winter foraging of Florida manatees Trichechus manatus latirostris. We analyzed telemetry data for 12 manatees over 7 yr to assess their use of Kings Bay, a winter refuge with diminished SAV. After...
Spatial distribution of nutrients, chloride, and suspended sediment concentrations and loads determined by using different sampling methods in a cross section of the Trenton Channel of the Detroit River, Michigan, November 2014–November 2015
Alexander R. Totten, Joseph W. Duris
2019, Scientific Investigations Report 2018-5141
The Detroit River separates the United States and Canada as it flows from Lake St. Clair to Lake Erie. The Trenton Channel is a 13-kilometer-long branch of the Detroit River that flows to the west of Grosse Ile before rejoining the Detroit River near its mouth, just before the Detroit...
Spatial and temporal variability of harmful algal blooms in Milford Lake, Kansas, May through November 2016
Guy M. Foster, Jennifer L. Graham, Lindsey R. King
2019, Scientific Investigations Report 2018-5166
The U.S. Geological Survey, in cooperation with the Kansas Department of Health and Environment (KDHE), completed a study to quantify the spatial and temporal variability of cyanobacterial blooms in Milford Lake, Kansas, over a range of environmental conditions at various time scales (hours to months). A better understanding of the...
Characterizing the influence of fire on hydrology in southern California
Lorraine E. Flint, Emma C Underwood, Alan L. Flint, Allan Hollander
2019, Natural Areas Journal (39) 108-121
The chaparral-dominated national forests of southern California were in part established to provide water provision services to the surrounding urban populations and irrigation for agriculture. However, water provision in the form of groundwater recharge and surface runoff depends on the climatological conditions of any given...
Fungicides: An overlooked pesticide class?
Jochen Zubrod, Micro Bundschuh, Gertie Arts, Carsten Bruhl, Gwenael Imfeld, Anja Knabel, Sylvain Payraudeau, Jes J Rasmussen, Jason Rohr, Andreas Scharmuller, Kelly L. Smalling, Sebastian Stehle, Ralf B. Schäfer, Ralf Schulz
2019, Environmental Science & Technology (53) 3347-3365
Fungicides are indispensable to global food security and their use is forecasted to intensify. Fungicides can reach aquatic ecosystems and occur in surface water bodies in agricultural catchments throughout the whole growing season due to their frequent, prophylactic application. However, in comparison to herbicides and insecticides, the exposure to and...
Assessing the lead solubility potential of untreated groundwater of the United States
Bryant Jurgens, David L. Parkhurst, Kenneth Belitz
2019, Environmental Science & Technology (53) 3095-3103
In the U.S., about 44 million people rely on self-supplied groundwater for drinking water. Because most self-supplied homeowners do not treat their water to control corrosion, drinking water can be susceptible to lead (Pb) contamination from metal plumbing. To assess the types and locations of susceptible groundwater, a geochemical reaction...
An assessment of plant species differences on cellulose oxygen isotopes from two Kenai Peninsula, Alaska peatlands: Implications for hydroclimatic reconstructions
Miriam Jones, Lesleigh Anderson, Katherine Keller, Bailey Nash, Virginia Littell, Matthew J. Wooller, Chelsea Jolley
2019, Frontiers in Earth Science (7)
Peat cores are valuable archives of past environmental change because they accumulate plant organic matter over millennia. While studies have primarily focused on physical, ecological, and some biogeochemical proxies, cores from peatlands have increasingly been used to interpret hydroclimatic change using stable isotope analyses of cellulose preserved in plant remains....
Hormones and pharmaceuticals in groundwater used as a source of drinking water across the United States
Laura M. Bexfield, Patricia Toccalino, Kenneth Belitz, William T. Foreman, Edward Furlong
2019, Environmental Science & Technology (53) 2950-2960
This is the first large-scale, systematic assessment of hormone and pharmaceutical occurrence in groundwater used for drinking across the United States. Samples from 1091 sites in Principal Aquifers representing 60% of the volume pumped for drinking-water supply had final data for 21 hormones and 103 pharmaceuticals. At least one compound...
Modeling connectivity of non‐floodplain wetlands: Insights, approaches, and recommendations
C. Nathan Jones, Ali A. Ameli, Brian Neff, Grey R. Evenson, Daniel L. McLaughlin, Heather E. Golden, Charles R. Lane
2019, Journal of the American Water Resources Association (JAWRA) (55) 559-577
Representing hydrologic connectivity of non‐floodplain wetlands (NFWs) to downstream waters in process‐based models is an emerging challenge relevant to many research, regulatory, and management activities. We review four case studies that utilize process‐based models developed to simulate NFW hydrology. Models range from a simple, lumped parameter...
GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl
Fiona McDuie, Michael L. Casazza, Cory T. Overton, Mark P. Herzog, C. Alex Hartman, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
2019, Movement Ecology (7) 1-17
BackgroundSpatio-temporal patterns of movement can characterize relationships between organisms and their surroundings, and address gaps in our understanding of species ecology, activity budgets, bioenergetics, and habitat resource management. Highly mobile waterfowl, which can exploit resources over large spatial extents, are excellent models to understand relationships...
Modelling for catchment management
Aroon Parshotam, Dale M. Robertson
David P. Hamilton, Kevin J. Collier, John M. Quinn, Clive Howard-Williams, editor(s)
2019, Book chapter, Lake restoration handbook
Catchment models are useful tools to help describe and quantify the sources, transport, and fate of sediment, nutrients, and other constituents in a landscape. Results from catchment models are used to quantify and understand existing conditions and used in restoration efforts by defining areas with highest contributions (hotspots, where actions...
Patterns of big sagebrush plant community composition and stand structure in the western United States
Victoria E. Pennington, John B. Bradford, Kyle A. Palmquist, Rachel R. Renne, William K. Lauenroth
2019, Rangeland Ecology and Management (72) 505-514
Big sagebrush (Artemisia tridentata Nutt.) plant communities are found in western North America and comprise a mix of shrubs, forbs, and grasses. Climate, topography, and soil water availability are important factors that shape big sagebrush stand structure and plant community composition; however, most studies have focused on understanding these relationships at sites in a small portion of...
Physical, biogeochemical, and meteorological factors responsible for interannual changes in cyanobacterial community composition and biovolume over two decades in a eutrophic lake
Chelsea A. Weirich, Dale M. Robertson, Todd R. Miller
2019, Hydrobiologia (828) 165-182
This study used a 20-year dataset (1995–2014) to identify factors affecting cyanobacterial community composition (CCC) and abundance in a eutrophic lake. We hypothesized that differences in thermal structure, nutrients, and meteorology drive interannual variability in CCC and abundance. Cluster analysis differentiated dominant cyanobacteria into rare, low abundance, or sporadically occurring...
Influenza A prevalence and subtype diversity in migrating teal sampled along the United States Gulf Coast
Deborah Carter, Paul T. Link, Patrick Walther, Andrew M. Ramey, David E. Stallknecht, Rebecca L. Poulson
2019, Avian Diseases (63) 165-171
Wild birds in the order Anseriformes are important reservoirs for influenza A viruses (IAV); however, IAV prevalence and subtype diversity may vary by season, even at the same location. To better understand the ecology of IAV during waterfowl migration through the Gulf Coast of the United States (Louisiana and Texas),...
Carbon accumulation and vertical accretion in a restored vs. historic salt marsh in southern Puget Sound, Washington, United States
Judith Z. Drexler, Isa Woo, Christopher C. Fuller, Glynnis Nakai
2019, Restoration Ecology (27) 1117-1127
Few comparisons exist between vertical accretion (VA) and carbon accumulation rates (CARs), in restored vs. historic (i.e., reference) marshes. Here we compare these processes in a formerly diked, sparsely vegetated, restored salt marsh (Six Gill Slough, SG), whose surface is subsided relative to the tidal frame, to an adjacent,...
Unprocessed atmospheric nitrate in waters of the Northern Forest Region in the USA and Canada
Stepen D Sebestyen, Donald D Ross, James B. Shanley, Emily M. Elliott, Carol Kendall, John L. Campbell, D Bryan Dail, Ivan J Fernandez, Christine L Goodale, Gregory B. Lawrence, Gary M. Lovett, Patrick J McHale, Myron J Mitchell, Sarah J. Nelson, Michelle D Shattuck, Trent R Wickman, Rebecca T. Barnes, Joel T. Bostic, Anthony R Buda, Douglas A Burns, Keith N. Eshleman, Jacques C. Finlay, David M. Nelson, Nobuhito Ohte, Linda H Pardo, Lucy A Rose, Robert J Sabo, Sherry L. Schiff, John Spoelstra, Karl W Williard
2019, Environmental Science and Technology (53) 3620-3633
Little is known about the regional extent and variability of nitrate from atmospheric deposition that is transported to streams without biological processing in forests. We measured water chemistry and isotopic tracers (δ18O and δ15N) of nitrate sources across the Northern Forest...
Heat and mass transport in a vapor-dominated hydrothermal area in Yellowstone National Park, USA: Inferences from magnetic, electrical, electromagnetic, subsurface temperature and diffuse CO2 flux measurements
Claire Bouligand, Shaul Hurwitz, Jean Vandemeulebrouck, Svetlana Byrdina, Mason A. Kass, Jennifer L. Lewicki
2019, Journal of Geophysical Research B: Solid Earth (124) 291-309
Vapor‐dominated hydrothermal systems are characterized by localized and elevated heat and gas flux. In these systems, steam and gas ascend from a boiling water reservoir, steam condenses beneath a low‐permeability cap layer, and liquid water descends, driven by gravity (“heat pipe” model). We combine magnetic, electromagnetic, and geoelectrical methods and...
Assessment of Columbia and Willamette River flood stage on the Columbia Corridor Levee System at Portland, Oregon, in a future climate
Susan A. Wherry, Tamara M. Wood, Hans R. Moritz, Keith B. Duffy
2019, Scientific Investigations Report 2018-5161
To support Levee Ready Columbia’s (LRC’s) effort to re-certify levees along the Columbia and Willamette Rivers and remain accredited, two 2-dimensional hydraulic models, Adaptive Hydraulics and Delft3D-Flexible Mesh, were used to simulate the effects of plausible extreme high water during the 2030 to 2059 period. The Columbia River was simulated...
Metabolic rhythms in flowing waters: An approach for classifying river productivity regimes
Philip Savoy, Emily S. Bernhardt, Alison P. Appling, James B. Heffernan, Edward G. Stets, Jordan S. Read, Judson Harvey
2019, Limnology and Oceanography (64) 1835-1851
Although seasonal patterns of ecosystem productivity have been extensively described and analyzed with respect to their primary forcings in terrestrial and marine systems, comparatively little is known about these same processes in rivers. However, it is now possible to perform a large‐scale synthesis on the patterns and drivers of river...
Influence of salinity on relative density of American crocodiles (Crocodylus acutus) in Everglades National Park: Implications for restoration of Everglades ecosystems
Frank J. Mazzotti, Brian Smith, Michiko Squires, Michael S. Cherkiss, Seth C Farris, Caitlin Hackett, Kristen M. Hart, Venetia Briggs-Gonzalez, Laura A. Brandt
2019, Ecological Indicators (102) 608-616
The status of the American crocodile (Crocodylus acutus) has long been a matter of concern in Everglades National Park (ENP) due to its classification as a federal and state listed species, its recognition as a flagship species, and its function as an ecosystem indicator. Survival and recovery of American crocodiles...
Quantification of sucralose in groundwater well drinking water by silylation derivatization and gas chromatography-mass spectrometry
Stefan Voss, Elisabeth Newman, Justin P Miller-Schulze
2019, Analytical Methods (21)
Sucralose is an increasingly popular artificial sweetener and has been found in the environment in groundwater, surface water, and wastewater treatment plant effluent. Its chemical properties make it strongly recalcitrant in the environment and it has been used as a conservative tracer of human wastewater in recent years. Most...
Isotopic ratios of Saturn's rings and satellites: Implications for the origin of water and Phoebe
Roger N. Clark, Robert H. Brown, D.P. Cruikshank, Gregg A. Swayze
2019, Icarus (40) 431-470
Isotopic ratios have long been used to learn about physical processes acting over a wide range of geological environments, and in constraining the origin and/or evolution of planetary bodies. We report the spectroscopic detection of deuterium in Saturn's rings and satellites, and use these measurements to determine the (D/H) ratios...
Recent trends in nutrient and sediment loading to coastal areas of the conterminous U.S.: Insights and global context
Gretchen P. Oelsner, Edward G. Stets
2019, Science of the Total Environment (654) 1225-1240
Coastal areas in the U.S. and worldwide have experienced massive population and land use changes contributing to significant degradation of coastal ecosystems. Excess nutrient pollution causes coastal ecosystem degradation, and both regulatory and management efforts have targeted reducing nutrient and sediment loading to coastal rivers. Decadal trends in flow-normalized nutrient...
