Identifying non-point sources of endocrine active compounds and their biological impacts in freshwater lakes
Beth H. Baker, Dalma Martinovic-Weigelt, Mark L. Ferrey, Larry B. Barber, Jeffrey H. Writer, Donald O. Rosenberry, Richard L. Kiesling, James R. Lundy, Heiko L. Schoenfuss
2014, Archives of Environmental Contamination and Toxicology (67) 374-388
Contaminants of emerging concern, particularly endocrine active compounds (EACs), have been identified as a threat to aquatic wildlife. However, little is known about the impact of EACs on lakes through groundwater from onsite wastewater treatment systems (OWTS). This study aims to identify specific contributions of OWTS to Sullivan Lake, Minnesota,...
Forest ecosystem reorganization underway in the Southwestern US: A preview of widespread forest changes in the Anthropocene
Craig D. Allen
V. Alaric Sample, R. Patrick Bixler, editor(s)
2014, Proceedings RMRS-P-71
No abstract available....
Stratigraphy, structure and regional correlation of eastern Blue Ridge sequences in southern Virginia and northwestern North Carolina: an interim report from new USGS mapping
Mark W. Carter, Arthur J. Merschat
2014, GSA Field Guides (35) 215-241
Examination of key outcrops in the eastern Blue Ridge in southern Virginia and northwestern North Carolina is used to evaluate existing stratigraphic and structural models. Recent detailed mapping along the Blue Ridge Parkway and the eastern flank of the Mount Rogers massif provides the opportunity to (1) evaluate legacy...
Science applications of a multispectral microscopic imager for the astrobiological exploration of Mars
Jorge Nunez, Jack Farmer, R. Glenn Sellar, Gregg A. Swayze, Diana L. Blaney
2014, Astrobiology (14) 132-169
Future astrobiological missions to Mars are likely to emphasize the use of rovers with in situ petrologic capabilities for selecting the best samples at a site for in situ analysis with onboard lab instruments or for caching for potential return to Earth. Such observations are central to an understanding of the potential for past...
Niche restriction and conservatism in a neotropical psittacine: the case of the Puerto Rican parrot
Thomas H. White Jr., Jaime A. Collazo, Stephen J. Dinsmore, I. C. Llerandi-Roman
2014, Book chapter
The factors which govern species‘ distribution and abundance are myriad, and together constitute the ecological niche of a given species. Because abiotic factors are arguably the most profound of the factors influencing niche boundaries and thus, species distributions, substantial changes in either climatic or habitat-related parameters can be expected to...
Seismometer Self-Noise and Measuring Methods
Adam T. Ringler, R. Sleeman, Charles R. Hutt, Lind S. Gee
2014, Book chapter, Encyclopedia of Earthquake Engineering
Seismometer self-noise is usually not considered when selecting and using seismic waveform data in scientific research as it is typically assumed that the self-noise is negligibly small compared to seismic signals. However, instrumental noise is part of the noise in any seismic record, and in particular, at frequencies below a...
Arsenic associated with historical gold mining in the Sierra Nevada foothills: Case study and field trip guide for Empire Mine State Historic Park, California
Charles N. Alpers, Perry A Myers, Daniel Millsap, Tamsen B Regnier
Robert J. Bowell, Charles N. Alpers, Heather E. Jamieson, D. Kirk Nordstrom, Juraj Majzlan, editor(s)
2014, Reviews in Mineralogy and Geochemistry (79) 553-587
The Empire Mine, together with other mines in the Grass Valley mining district, produced at least 21.3 million troy ounces (663 tonnes) of gold (Au) during the 1850s through the 1950s, making it the most productive hardrock Au mining district in California history (Clark 1970). The Empire Mine...
Quantifying spatial scaling patterns and their local and regional correlates in headwater streams: Implications for resilience
Emma Gothe, Leonard Sandin, Craig R. Allen, David G. Angeler
2014, Ecology and Society (19)
The distribution of functional traits within and across spatiotemporal scales has been used to quantify and infer the relative resilience across ecosystems. We use explicit spatial modeling to evaluate within- and cross-scale redundancy in headwater streams, an ecosystem type with a hierarchical and dendritic network structure. We assessed the cross-scale...
Development of a multimetric index for fish assemblages in a cold tailwater in Tennessee
Tomas J. Ivasauskas, Phillip William Bettoli
2014, Transactions of the American Fisheries Society (143) 495-507
Tailwaters downstream of hypolimnetic-release hydropeaking dams exhibit a unique combination of stressors that affects the structure and function of resident fish assemblages. We developed a statistically and biologically defensible multimetric index of fish assemblages for the Caney Fork River below Center Hill Dam, Tennessee. Fish assemblages were sampled at five...
Understanding the value of imperfect science from national estimates of bird mortality from window collisions
Craig S. Machtans, Wayne E. Thogmartin
2014, Condor (116) 3-7
The publication of a U.S. estimate of bird–window collisions by Loss et al. is an example of the somewhat contentious approach of using extrapolations to obtain large-scale estimates from small-scale studies. We review the approach by Loss et al. and other authors who have published papers on human-induced avian mortality...
Evidence of natural reproduction by Muskellunge in middle Tennessee rivers
Lila H. Warren, Phillip William Bettoli
2014, Southeastern Naturalist (13) 506-514
Native Esox masquinongy (Muskellunge) in the Cumberland River drainage, TN, were nearly extirpated in the 1970s due to decades of over-fishing and habitat degradation from coal mining, logging, and other land-use practices. In an effort to preserve the species in that drainage, a stocking program began in 1976 in the upper Caney...
Backcasting the decline of a vulnerable Great Plains reproductive ecotype: identifying threats and conservation priorities
Thomas A. Worthington, Shannon K. Brewer, Timothy B. Grabowski, Julia Mueller
2014, Global Change Biology (20) 89-102
Conservation efforts for threatened or endangered species are challenging because the multi-scale factors that relate to their decline or inhibit their recovery are often unknown. To further exacerbate matters, the perceptions associated with the mechanisms of species decline are often viewed myopically rather than across the entire species range. We...
Potentiometric surface and water-level difference maps of selected confined aquifers in Southern Maryland and Maryland’s Eastern Shore, 1975-2013
Andrew W. Staley, David C. Andreasen, Stephen E. Curtin
2014, Open-File Report 14-02-02
Groundwater is the principal source of freshwater supply in most of Southern Maryland and Maryland’s Eastern Shore. It is also the source of freshwater supply used in the operation of the Calvert Cliffs, Chalk Point, and Morgantown power plants. Increased groundwater withdrawals over the last several decades have caused groundwater...
Plenary: Progress in Regional Landslide Hazard Assessment—Examples from the USA
Rex L. Baum, William H. Schulz, Dianne L. Brien, William J. Burns, Mark E. Reid, Jonathan W. Godt
2014, Conference Paper, Landslide science for a safer geoenvironment
Landslide hazard assessment at local and regional scales contributes to mitigation of landslides in developing and densely populated areas by providing information for (1) land development and redevelopment plans and regulations, (2) emergency preparedness plans, and (3) economic analysis to (a) set priorities for engineered mitigation projects and (b) define...
A new species of freshwater eel-tailed catfish of the genus Tandanus (Teleostei: Plotosidae) from the Wet Tropics Region of Eastern Australia
Stuart A. Welsh, Dean R. Jerry, Damien Burrows
2014, Copeia (2014) 136-142
Tandanus tropicanus, new species, is described based on specimens from streams in the wet tropics region of northeast Queensland. Previously, two species were recognized in the genus Tandanus: T. tandanus of eastern Australia and T. bostocki of Western Australia. A combination of meristic and morphometric characters distinguishes the new species from all congeners. Further, taxonomic...
Multielevation calibration of frequency-domain electromagnetic data
Burke J. Minsley, M. Andy Kass, Greg Hodges, Bruce D. Smith
2014, Geophysics (79) E201-E216
Systematic calibration errors must be taken into account because they can substantially impact the accuracy of inverted subsurface resistivity models derived from frequency-domain electromagnetic data, resulting in potentially misleading interpretations. We have developed an approach that uses data acquired at multiple elevations over the same location to assess calibration errors....
Using lead isotopes and trace element records from two contrasting Lake Tanganyika sediment cores to assess watershed – Lake exchange
Kingsley Odigie, A.D. Cohen, Peter W. Swarzenski, R Flegal
2014, Applied Geochemistry (51) 184-190
Lead isotopic and trace element records of two contrasting sediment cores were examined to reconstruct historic, industrial contaminant inputs to Lake Tanganyika, Africa. Observed fluxes of Co, Cu, Mn, Ni, Pb, and Zn in age-dated sediments collected from the lake varied both spatially and temporally over the past two to...
Social impact analysis: monetary valuation
Lisa A. Wainger, Robert J. Johnston, Kenneth J. Bagstad, Frank Casey, Tibor Vegh
2014, Book chapter, Federal Resource Management and Ecosystem Services Guidebook
This section provides basic guidance for using and conducting economic valuation, including criteria for judging whether valuation is appropriate for supporting decisions. It provides an introduction to the economic techniques used to measure changes in social welfare and describes which methods may be most appropriate for use in valuing particular...
Delineation of Tundra Swan Cygnus c. columbianus populations in North America: geographic boundaries and interchange
Craig R. Ely, William J.L. Sladen, Heather M. Wilson, Susan E. Savage, Kristine M. Sowl, Bill Henry, Mike Schwitters, James Snowden
2014, Wildfowl (64) 132-147
North American Tundra Swans Cygnus c. columbianus are composed of two wellrecognised populations: an Eastern Population (EP) that breeds across northern Canada and north of the Brooks Range in Alaska, which migrates to the eastern seaboard of the United States, and a Western Population (WP) that breeds in coastal regions of Alaska south of the Brooks...
Fine-grained linings of leveed channels facilitate runout of granular flows
B.P. Kokelaar, R. L. Graham, J.M.N.T. Gray, James W. Vallance
2014, Earth and Planetary Science Letters (385) 172-180
Catastrophic dense granular flows, such as occur in rock avalanches, debris flows and pyroclastic flows, move as fully shearing mixtures that have approximately 60 vol.% solids and tend to segregate to form coarse-grained fronts and leveed channels. Levees restrict spreading of unconfined flows and form as coarse particles that become...
Predicting connectivity of green turtles at Palmyra Atoll, central Pacific: a focus on mtDNA and dispersal modelling
Eugenia Naro-Maciel, Stephen J. Gaughran, Nathan Freeman Putman, George Amato, Felicity Arengo, Peter H. Dutton, Katherine W. McFadden, Erin C. Vintinner, Eleanor J. Sterling
2014, Journal of the Royal Society Interface (11)
Population connectivity and spatial distribution are fundamentally related to ecology, evolution and behaviour. Here, we combined powerful genetic analysis with simulations of particle dispersal in a high-resolution ocean circulation model to investigate the distribution of green turtles foraging at the remote Palmyra Atoll National Wildlife Refuge, central Pacific. We analysed...
Meteorological variables associated with deep slab avalanches on persistent weak layers
Alex Marienthal, Jordy Hendrikx, Karl W. Birkeland, Kathryn M. Irvine
2014, Conference Paper, Proceedings, International Snow Science Workshop, Banff, 2014
Deep slab avalanches are a particularly challenging avalanche forecasting problem. These avalanches are typically difficult to trigger, yet when they are triggered they tend to propagate far and result in large and destructive avalanches. For this work we define deep slab avalanches as those that fail on persistent weak layers...
Tracking changes in volcanic systems with seismic Interferometry
Matthew M. Haney, Alicia J. Hotovec-Ellis, Ninfa L. Bennington, Silvio De Angelis, Clifford Thurber
2014, Book chapter, Encyclopedia of Earthquake Engineering
The detection and evaluation of time-dependent changes at volcanoes form the foundation upon which successful volcano monitoring is built. Temporal changes at volcanoes occur over all time scales and may be obvious (e.g., earthquake swarms) or subtle (e.g., a slow, steady increase in the level of tremor). Some of the...
Northern Pintail
Robert G. Clark, Joseph P. Fleskes, Karla L. Guyn, David A. Haukos, Jane E. Austin, Michael R. Miller
2014, The Birds of North America
This medium-sized dabbling duck of slender, elegant lines and conservative plumage coloration is circumpolar in distribution and abundant in North America, with core nesting habitat in Alaska and the Prairie Pothole Region of southern Canada and the northern Great Plains. Breeders favor shallow wetlands interspersed throughout prairie grasslands or arctic...
Segmentation of plate coupling, fate of subduction fluids, and modes of arc magmatism in Cascadia, inferred from magnetotelluric resistivity
Philip E. Wannamaker, Rob L. Evans, Paul A. Bedrosian, Martyn J. Unsworth, Virginie Maris, R. Shane McGary
2014, Geochemistry, Geophysics, Geosystems (15) 4230-4253
Five magnetotelluric (MT) profiles have been acquired across the Cascadia subduction system and transformed using 2-D and 3-D nonlinear inversion to yield electrical resistivity cross sections to depths of ∼200 km. Distinct changes in plate coupling, subduction fluid evolution, and modes of arc magmatism along the length of Cascadia are...
