Climate change impacts on the temperature and magnitude of groundwater discharge from shallow, unconfined aquifers
Barret L. Kurylyk, Kerry T.B MacQuarrie, Clifford I. Voss
2014, Water Resources Research (50) 3253-3274
Cold groundwater discharge to streams and rivers can provide critical thermal refuge for threatened salmonids and other aquatic species during warm summer periods. Climate change may influence groundwater temperature and flow rates, which may in turn impact riverine ecosystems. This study evaluates the potential impact of climate change on the...
A 17-year record of environmental tracers in spring discharge, Shenandoah National Park, Virginia, USA: use of climatic data and environmental conditions to interpret discharge, dissolved solutes, and tracer concentrations
Eurybiades Busenberg, Niel Plummer
2014, Aquatic Geochemistry (20) 267-290
A 17-year record (1995–2012) of a suite of environmental tracer concentrations in discharge from 34 springs located along the crest of the Blue Ridge Mountains in Shenandoah National Park (SNP), Virginia, USA, reveals patterns and trends that can be related to climatic and environmental conditions. These data include a 12-year...
Spatial and temporal patterns of endocrine active chemicals in small streams indicate differential exposure to aquatic organisms
K. E. Lee, L. B. Barber, H.L. Schoenfuss
2014, Journal of the American Water Resources Association (50) 401-419
Alkylphenolic chemicals (APCs) and hormones were measured six times from February through October 2007 in three Minnesota streams receiving wastewater to identify spatial and temporal patterns in concentrations and in estrogen equivalency. Fish were collected once during the study to evaluate endpoints indicative of endocrine disruption. The most commonly detected...
Reconnaissance of pharmaceuticals and wastewater indicators in streambed sediments of the lower Columbia River basin, Oregon and Washington
Elena Nilsen, Edward T. Furlong, Robert Rosenbauer
2014, Journal of the American Water Resources Association (50) 291-301
One by-product of advances in modern chemistry is the accumulation of synthetic chemicals in the natural environment. These compounds include contaminants of emerging concern (CECs), some of which are endocrine disrupting compounds (EDCs) that can have detrimental reproductive effects. The role of sediments in accumulating these types of...
Otolith microchemistry of tropical diadromous fishes: spatial and migratory dynamics
William E. Smith, Thomas J. Kwak
2014, Journal of Fish Biology (84) 913-928
Otolith microchemistry was applied to quantify migratory variation and the proportion of native Caribbean stream fishes that undergo full or partial marine migration. Strontium and barium water chemistry in four Puerto Rico, U.S.A., rivers was clearly related to a salinity gradient; however, variation in water barium, and thus fish otoliths,...
A capture-recapture model of amphidromous fish dispersal
W. Smith, Thomas J. Kwak
2014, Journal of Fish Biology (84) 897-912
Adult movement scale was quantified for two tropical Caribbean diadromous fishes, bigmouth sleeper Gobiomorus dormitor and mountain mullet Agonostomus monticola, using passive integrated transponders (PITs) and radio-telemetry. Large numbers of fishes were tagged in Rio Mameyes, Puerto Rico, U.S.A., with PITs and monitored at three fixed locations over a 2-5...
Small reservoir distribution, rate of construction, and uses in the upper and middle Chattahoochee basins of the Georgia Piedmont, USA, 1950-2010
Amber R. Ignatius, John W. Jones
2014, ISPRS International Journal of Geo-information (3) 460-480
Construction of small reservoirs affects ecosystem processes in numerous ways including fragmenting stream habitat, altering hydrology, and modifying water chemistry. While the upper and middle Chattahoochee River basins within the Southeastern United States Piedmont contain few natural lakes, they have a high density of small reservoirs (more than 7500 small...
Infection of sea lamprey with an unusual strain of Aeromonas salmonicida
Arfang Diamanka, Thomas P. Loch, Rocco C. Cipriano, Andrew D. Winters, Mohamed Faisal
2014, Journal of Wildlife Diseases (50) 159-170
The invasion of the Laurentian Great Lakes by the fish-parasitic sea lamprey has led to catastrophic consequences, including the potential introduction of fish pathogens. Aeromonas salmonicida is a bacterial fish pathogen that causes devastating losses worldwide. Currently, there are five accepted subspecies of Aeromonas salmonicida: A. salmonicida subsp. salmonicida, masoucida,...
Successes and challenges from formation to implementation of eleven broad-extent conservation programs
Erik A. Beever, John B. Bradford, Matthew J. Germino, Brady J. Mattsson, Max Post van der Burg, Mark Brunson
2014, Conservation Biology (28) 302-314
Integration of conservation partnerships across geographic, biological, and administrative boundaries is increasingly relevant because drivers of change, such as climate shifts, transcend these boundaries. We explored successes and challenges of established conservation programs that span multiple watersheds and consider both social and ecological concerns. We asked representatives from a diverse...
Occurrence of contaminants of emerging concern along the California coast (2009-10) using passive sampling devices
David A. Alvarez, Keith A. Maruya, Nathan G. Dodder, Wenjian Lao, Edward T. Furlong, Kelly L. Smalling
2014, Marine Pollution Bulletin (81) 347-354
Three passive sampling devices (PSDs), polar organic chemical integrative samplers (POCIS), polyethylene devices (PEDs), and solid-phase microextraction (SPME) samplers were used to sample a diverse set of chemicals in the coastal waters of San Francisco Bay and the Southern California Bight. Seventy one chemicals (including fragrances, phosphate flame retardants, pharmaceuticals,...
Mineralogical, chemical and K-Ar isotopic changes in Kreyenhagen Shale whole rocks and <2 µm clay fractions during natural burial and hydrous-pyrolysis experimental maturation
Norbert Clauer, Michael D. Lewan, Michael P. Dolan, Sambhudas Chaudhuri, John B. Curtis
2014, Geochimica et Cosmochimica Acta (130) 93-112
Progressive maturation of the Eocene Kreyenhagen Shale from the San Joaquin Basin of California was studied by combining mineralogical and chemical analyses with K–Ar dating of whole rocks and <2 μm clay fractions from naturally buried samples and laboratory induced maturation by hydrous pyrolysis of an immature outcrop sample. The K–Ar...
Capturing interactions between nitrogen and hydrological cycles under historical climate and land use: Susquehanna watershed analysis with the GFDL land model LM3-TAN
M. Lee, S. Malyshev, E. Shevliakova, Paul C. D. Milly, P. R. Jaffe
2014, Biogeosciences (11) 5809-5826
We developed a process model LM3-TAN to assess the combined effects of direct human influences and climate change on terrestrial and aquatic nitrogen (TAN) cycling. The model was developed by expanding NOAA's Geophysical Fluid Dynamics Laboratory land model LM3V-N of coupled terrestrial carbon and nitrogen (C-N) cycling and including new...
Pesticide Toxicity Index: a tool for assessing potential toxicity of pesticide mixtures to freshwater aquatic organisms
Lisa H. Nowell, Julia E. Norman, Patrick W. Moran, Jeffrey D. Martin, Wesley W. Stone
2014, Science of the Total Environment (476-477) 144-157
Pesticide mixtures are common in streams with agricultural or urban influence in the watershed. The Pesticide Toxicity Index (PTI) is a screening tool to assess potential aquatic toxicity of complex pesticide mixtures by combining measures of pesticide exposure and acute toxicity in an additive toxic-unit model. The PTI is determined...
Behavioural cues surpass habitat factors in explaining prebreeding resource selection by a migratory diving duck
Shawn T. O’Neil, Jeffrey M. Warren, John Y. Takekawa, Susan E. W. De La Cruz, Kyle A. Cutting, Michael W. Parker, Julie L. Yee
2014, Animal Behaviour (90) 21-29
Prebreeding habitat selection in birds can often be explained in part by habitat characteristics. However, females may also select habitats on the basis of fidelity to areas of previous reproductive success or use by conspecifics. The relative influences of sociobehavioural attributes versus habitat characteristics in habitat selection has been primarily...
Distinguishing seawater from geologic brine in saline coastal groundwater using radium-226; an example from the Sabkha of the UAE
Thomas F. Kraemer, Warren W. Wood, Ward E. Sanford
2014, Chemical Geology (371) 1-8
Sabkhat (Salt flats) are common geographic features of low-lying marine coastal areas that develop under hyper-arid climatic conditions. They are characterized by the presence of highly concentrated saline solutions and evaporitic minerals, and have been cited in the geologic literature as present-day representations of hyper-arid regional paleohydrogeology, paleoclimatology, coastal processes,...
American shad migratory behavior, weight loss, survival, and abundance in a North Carolina River following dam removals
Joshua K. Raabe, Joseph E. Hightower
2014, Transactions of the American Fisheries Society (143) 673-688
Despite extensive management and research, populations of American Shad Alosa sapidissima have experienced prolonged declines, and uncertainty about the underlying mechanisms causing these declines remains. In the springs of 2007 through 2010, we used a resistance board weir and PIT technology to capture, tag, and track American Shad in the Little River,...
Landsat-8: Science and product vision for terrestrial global change research
David P. Roy, M.A. Wulder, Thomas R. Loveland, C. E. Woodcock, R. G. Allen, M. C. Anderson, D. Helder, J. R. Irons, D.M. Johnson, R. Kennedy, T. A. Scambos, Crystal B. Schaaf, J. R. Schott, Y. Sheng, E. F. Vermote, A.S. Belward, R. Bindschadler, W.B. Cohen, F. Gao, J. D. Hipple, Patrick Hostert, J. Huntington, C.O. Justice, A. Kilic, Valeriy Kovalskyy, Z. P. Lee, Leo Lymburner, J. G. Masek, Joel McCorkel, Y. Shuai, R. Trezza, James Vogelmann, R.H. Wynne, Z. Zhu
2014, Remote Sensing of Environment (145) 154-172
Landsat 8, a NASA and USGS collaboration, acquires global moderate-resolution measurements of the Earth's terrestrial and polar regions in the visible, near-infrared, short wave, and thermal infrared. Landsat 8 extends the remarkable 40 year Landsat record and has enhanced capabilities including new spectral bands in the blue and cirrus cloud-detection portion...
Genetic structuring of northern myotis (Myotis septentrionalis) at multiple spatial scales
Joshua B. Johnson, James H. Roberts, Tim L. King, John W. Edwards, W. Mark Ford, David A. Ray
2014, Acta Theriologica (59) 223-231
Although groups of bats may be genetically distinguishable at large spatial scales, the effects of forest disturbances, particularly permanent land use conversions on fine-scale population structure and gene flow of summer aggregations of philopatric bat species are less clear. We genotyped and analyzed variation at 10 nuclear DNA microsatellite markers...
Mummy Lake: An unroofed ceremonial structure within a large-scale ritual landscape
Larry V. Benson, Eleanor R. Griffin, J.R. Stein, R. A. Friedman, S. W. Andrae
2014, Journal of Archaeological Science (44) 164-179
The structure at Mesa Verde National Park known historically as Mummy Lake and more recently as Far View Reservoir is not part of a water collection, impoundment, or redistribution system. We offer an alternative explanation for the function of Mummy Lake. We suggest that it is an unroofed ceremonial structure,...
Infiltration and runoff generation processes in fire-affected soils
John A. Moody, Brian A. Ebel
2014, Hydrological Processes (28) 3432-3453
Post-wildfire runoff was investigated by combining field measurements and modelling of infiltration into fire-affected soils to predict time-to-start of runoff and peak runoff rate at the plot scale (1 m2). Time series of soil-water content, rainfall and runoff were measured on a hillslope burned by the 2010 Fourmile Canyon Fire west...
Biochar application to hardrock mine tailings: Soil quality, microbial activity, and toxic element sorption
Charlene N. Kelly, Christopher D. Peltz, Mark R. Stanton, David W. Rutherford, Colleen E. Rostad
2014, Applied Geochemistry (43) 35-48
Waste rock piles from historic mining activities remain unvegetated as a result of metal toxicity and high acidity. Biochar has been proposed as a low-cost remediation strategy to increase soil pH and reduce leaching of toxic elements, and improve plant establishment. In this laboratory column study, biochar made from beetle-killed...
Hydrological effects of forest transpiration loss in bark beetle-impacted watersheds
Lindsay A. Bearup, Reed M. Maxwell, David W. Clow, John E. McCray
2014, Nature Climate Change (4) 481-486
The recent climate-exacerbated mountain pine beetle infestation in the Rocky Mountains of North America has resulted in tree death that is unprecedented in recorded history. The spatial and temporal heterogeneity inherent in insect infestation creates a complex and often unpredictable watershed response, influencing the primary storage and flow components of...
Identifying legal, ecological and governance obstacles and opportunities for adapting to climate change
Barbara Cosens, Lance Gunderson, Craig R. Allen, Melinda H. Benson
2014, Sustainability (6) 2338-2356
Current governance of regional scale water management systems in the United States has not placed them on a path toward sustainability, as conflict and gridlock characterize the social arena and ecosystem services continue to erode. Changing climate may continue this trajectory, but it also provides a catalyst for renewal of...
Measurements of slope currents and internal tides on the Continental Shelf and slope off Newport Beach, California
Kurt J. Rosenberger, Marlene A. Noble, Benjamin Norris
2014, Open-File Report 2014-1041
An array of seven moorings housing current meters and oceanographic sensors was deployed for 6 months at 5 sites on the Continental Shelf and slope off Newport Beach, California, from July 2011 to January 2012. Full water-column profiles of currents were acquired at all five sites, and a profile of...
Groundwater-quality data in the Klamath Mountains study unit, 2010: results from the California GAMA Program
Timothy M. Mathany, Kenneth Belitz
2014, Data Series 803
Groundwater quality in the 8,806-square-mile Klamath Mountains (KLAM) study unit was investigated by the U.S. Geological Survey (USGS) from October to December 2010, as part of the California State Water Resources Control Board (SWRCB) Groundwater Ambient Monitoring and Assessment (GAMA) Program’s Priority Basin Project (PBP). The GAMA-PBP was developed in...
