Groundwater: The disregarded component in lake water and nutrient budgets, Part 1: Effects of groundwater on hydrology
Donald O. Rosenberry, Jorg Lewandowski, Karin Meinikmann, Gunnar Nutzmann
2015, Hydrological Processes (29) 2895-2921
Lake eutrophication is a large and growing problem in many parts of the world, commonly due to anthropogenic sources of nutrients. Improved quantification of nutrient inputs is required to address this problem, including better determination of exchanges between groundwater and lakes. This first of a two-part review provides a brief history of...
Shaking intensity from injection-induced versus tectonic earthquakes in the central-eastern United States
Susan E. Hough
2015, The Leading Edge (34) 690-697
Although instrumental recordings of earthquakes in the central and eastern United States (CEUS) remain sparse, the U. S. Geological Survey's “Did you feel it?” (DYFI) system now provides excellent characterization of shaking intensities caused by induced and tectonic earthquakes. Seventeen CEUS events are considered between 2013 and 2015. It is...
Science foundation Chapter 5 Appendix 5.1: Case study dabbling ducks
Gregory S. Yarris, Joshua T. Ackerman
2015, Report, The baylands and climate change what we can do: Baylands ecosystem habitat goals science update 2015
Dabbling ducks are the most abundant group of waterfowl that overwinter in the shallow wetlands and ponds of San Francisco Bay (SFB). Species within this group are primarily omnivorous, feeding on both plant material and macroinvertebrate prey by “tipping” to access benthic foods in bottom sediments or by foraging in...
Life on the edge in eastern Alaska: Basal Ordovician(Tremadocian), platform-margin faunas of the Jones Ridge Formation
J. F. Taylor, T. J. Allen, John E. Repetski, J. V. Strauss, S. J. Irwin
2015, Stratigraphy (12) 71-77
As the most fossiliferous and least deformed succession of unequivocally Laurentian lower Paleozoic strata in Alaska, the Jones Ridge Limestone has provided critical data for numerous stratigraphic studies (e. g. Palmer 1968; Harris et al. 1995; Dumoulin et al. 2002; Dumoulin and Harris 2012) focused on the Cambrian and Ordovician...
Hydrologic response for a high-elevation storm in the South Dakota Black Hills
Matthew J. Bunkers, Melissa Smith, Daniel G. Driscoll, Galen K. Hoogestraat
2015, Internal Report 2015-01
A group of thunderstorms produced >4 in of rain during four periods of progressively more intense rainfall across a small part of a relatively high-elevation area of the northern Black Hills on 5 August 2014. The resulting hydrologic response was noteworthy in two very small headwater drainage basins, where the...
Adaptive harvest management for the Svalbard population of pink-footed geese: 2015 progress summary
Fred A. Johnson, Jesper Madsen
2015, Technical Report from DCE - Danish Centre for Environment and Energy 64
This document describes progress to date on the development of an adaptive harvest management strategy for maintaining the Svalbard population of pink‐footed geese (Anser brachyrhynchus) near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. This report provides an assessment of the most recent monitoring...
Mechanisms of sediment flux between shallows and marshes
Jessica R. Lacy, L.M. Schile, J.C. Callaway, M.C. Ferner
2015, Conference Paper, The Proceedings of Coastal Sediments 2015
We conducted a field study to investigate temporal variation and forcing mechanisms of sediment flux between a salt marsh and adjacent shallows in northern San Francisco Bay. Suspended-sediment concentration (SSC), tidal currents, and wave properties were measured over the marsh, in marsh creeks, and in bay shallows. Cumulative sediment flux...
The role of suspension events in cross-shore and longshore suspended sediment transport in the surf zone
Bruce E. Jaffe
2015, Conference Paper, The Proceedings of the Coastal Sediments 2015
Suspension of sand in the surf zone is intermittent. Especially striking in a time series of concentration are periods of intense suspension, suspension events, when the water column suspended sediment concentration is an order of magnitude greater than the mean concentration. The prevalence, timing, and contribution of suspension events to...
Isotopic insights into biological regulation of zinc in contaminated systems
Richard B. Wanty, Laurie S. Balistrieri, Jeff S. Wesner, David Walters, Travis S. Schmidt, Francesca Podda, G. De Giudici, Craig A. Stricker, Johanna M. Kraus, Pierfranco Lattanzi, Ruth E. Wolf, R. Cidu
2015, Procedia Earth and Planetary Science (13) 60-63
Aquatic organisms use a variety of biogeochemical reactions to regulate essential and non-essential trace metals. Many of these mechanisms can lead to isotopic fractionation, thus measurement of metal isotopes may yield insights into the processes by which organisms respond to metal exposure. We illustrate these concepts with two case studies,...
Earthquake geology of the Bulnay Fault (Mongolia)
Magali Rizza, Jean-Franciois Ritz, Carol S. Prentice, Ricardo Vassallo, Regis Braucher, Christophe Larroque, A. Arzhannikova, S. Arzhanikov, Shannon A. Mahan, M. Massault, J-L. Michelot, M. Todbileg
2015, Bulletin of the Seismological Society of America (105) 72-93
The Bulnay earthquake of July 23, 1905 (Mw 8.3-8.5), in north-central Mongolia, is one of the world's largest recorded intracontinental earthquakes and one of four great earthquakes that occurred in the region during the 20th century. The 375-km-long surface rupture of the left-lateral, strike-slip, N095°E trending Bulnay Fault associated with...
How to recognize a “Beast Quake” and a “Dance Quake”
Stephen Malone, Kelley Hall, Lynn Simmons, John Vidale
2015, Seismological Research Letters (86) 449-450
Any good seismologist–carryball (i.e., American football) fan remembers the “beast quake” of 2011. Seahawks fans’ exuberant reactions to a Marshawn Lynch (in beast mode) run caused the stadium to shake enough to be well recorded on a strong‐motion seismograph a block away (Vidale, 2011). With the...
An environmental survey of Serpentine Hot Springs: Geology, hydrology, geochemistry, and microbiology
D. Kirk Nordstrom, Linda Hasselbach, Steven E. Ingebritsen, Dana Skorupa, R. Blaine McCleskey, Timothy R. McDermott
2015, Natural Resource Report NPS/BELA/NRR—2015/1019
Serpentine Hot Springs is the most visited site in the Bering Land Bridge National Preserve. The hot springs have traditionally been used by the Native people of the Seward Peninsula for religious, medicinal and spiritual purposes and continue to be used in many of the same ways by Native people...
Refinements to the Graves and Pitarka (2010) Broadband Ground Motion Simulation Method
Robert Graves, Arben Pitarka
2015, Seismological Research Letters (86) 75-80
This brief article describes refinements to the Graves and Pitarka (2010) broadband ground motion simulation methodology (GP2010 hereafter) that have been implemented in version 14.3 of the SCEC Broadband Platform (BBP). The updated version of our method on the current SCEC BBP is referred to as GP14.3. Our simulation technique...
Long-term monitoring program: Evaluating chronic exposure of harlequin ducks and sea otters to lingering Exxon Valdez Oil in Western Prince William Sound
Daniel Esler, Lizabeth Bowen, A. Keith Miles, Brenda E. Ballachey, James L. Bodkin
2015, Report
We found that average cytochrome P4501A induction (as measured by EROD activity) during March 2014 was not elevated in wintering harlequin ducks captured in areas of Prince William Sound oiled by the 1989 Exxon Valdez oil spill, relative to those captured in unoiled areas. This result is consistent with findings...
Development and characterization of polymorphic microsatellitemarkers for the crested caracara, Caracara cheriway
Erin E. Vaughn, James F. Dwyer, Joan L. Morrison, Melanie Culver
2015, Conservation Genetics Resources (7) 557-559
We isolated novel microsatellites from the crested caracara (Caracara cheriway) with a shotgun pyrosequencing approach. We tested 80 loci for polymorphism among 20 individuals from the threatened Florida population. Fourteen loci were polymorphic. The mean number of alleles was 2.21 (range 2–3) and the mean observed heterozygosity was 0.41 (range...
GEAR1: A Global Earthquake Activity Rate model constructed from geodetic strain rates and smoothed seismicity
Peter Bird, David D. Jackson, Yan Y. Kagan, Corne Kreemer, Ross Stein
2015, Bulletin of the Seismological Society of America (105) 2538-2554
Global earthquake activity rate model 1 (GEAR1) estimates the rate of shallow earthquakes with magnitudes 6–9 everywhere on Earth. It was designed to be reproducible and testable. Our preferred hybrid forecast is a log–linear blend of two parent forecasts based on the Global Centroid Moment Tensor (CMT) catalog (smoothing 4602...
Fecal indicator and pathogenic bacteria and their antibiotic resistance in alluvial groundwater of an irrigated agricultural region with dairies
Xunde Li, Edward R. Atwill, Elizabeth Antaki, Olin Applegate, Brian A. Bergamaschi, Ronald F. Bond, Jennifer T. Chase, Katherine M Ransom, William B. Samuels, Naoko Watanabe, Thomas Harter
2015, Journal of Environmental Quality (44) 1435-1447
Surveys of microbiological groundwater quality were conducted in a region with intensive animal agriculture in California, USA. The survey included monitoring and domestic wells in eight concentrated animal feeding operations (CAFOs) and 200 small (domestic and community supply district) supply wells across the region. Campylobacter was not detected in groundwater,...
The cost of karst subsidence and sinkhole collapse in the United States compared with other natural hazards
David J. Weary
2015, Conference Paper, 14th Sinkhole Conference
Rocks with potential for karst formation are found in all 50 states. Damage due to karst subsidence and sinkhole collapse is a natural hazard of national scope. Repair of damage to buildings, highways, and other infrastructure represents a significant national cost. Sparse and incomplete data show that the average cost...
Science foundation Chapter 5 Appendix 5.1: Case study california ridgway's rail (Rallus obseoletus obsoletus)
Cory T. Overton, Julian Wood
2015, Report, The baylands and climate change what we can do: Baylands ecosystem habitat goals science update 2015
The clapper rail (Rallus longirostris) recently was split into two sister groups (Chesser et al. 2014) on the basis of phylogenetic analyses (Maley and Brumfield 2013). The original grouping is now represented on the East Coast of North America by the Clapper rail (Rallus crepitans) and on the West Coast...
Upstream dam passage and use of an eel ladder by the common watersnake (Nerodia sipedon)
Stuart A. Welsh, Zachary J. Loughman
2015, Herpetological Review (46) 176-179
No abstract available....
Formulating the American Geophysical Union's Scientific Integrity and Professional Ethics Policy: Challenges and lessons learned
Linda C. Gundersen, Randy Townsend
2015, Book chapter, Geoethics: Ethical challenges and case studies in Earth Sciences
Creating an ethics policy for a large, diverse geosciences organization is a challenge, especially in the midst of the current contentious dialogue in the media related to such issues as climate change, sustaining natural resources, and responding to natural hazards. In 2011, the American Geophysical Union (AGU) took on this...
The effect of UV-C exposure on larval survival of the dreissenid quagga mussel
Alecia Stewart-Malone, Michael Misamore, Siri K. Wilmoth, Alejandro Reyes, Wai Hing Wong, Jackson Gross
2015, PLoS ONE (10 )
The rapid spread of quagga mussels (Dreissena rostriformis bugensis) has lead to their invasion of Lake Mead, Nevada, the largest reservoir in North America and partially responsible for providing water to millions of people in the southwest. Current strategies for mitigating the growth and spread of quagga mussels primarily include...
Gopherus Agassizii (Agassiz’s Desert Tortoise). Mechanical Injury
Amanda Smith, Laura A. Tennant, Jeffrey E. Lovich, Terence R. Arundel
2015, Herpetological Review (46) 423-424
On 3 June 2015 at 1024 h, a team of U.S. Geological Survey scientists located an immature Gopherus agassizii (Agassiz’s desert tortoise) at Joshua Tree National Park, near the southern Cottonwood Canyon entrance. The habitat in the area is typical of the Sonoran Desert in that part of California with...
Geologic framework for the assessment of undiscovered oil and gas resources in sandstone reservoirs of the Upper Jurassic-Lower Cretaceous Cotton Valley Group, U.S. Gulf of Mexico region
Jennifer D. Eoff, Russell F. Dubiel, Ofori N. Pearson, Katherine J. Whidden
2015, Conference Paper
The U.S. Geological Survey (USGS) is assessing the undiscovered oil and gas resources in sandstone reservoirs of the Upper Jurassic–Lower Cretaceous Cotton Valley Group in onshore areas and State waters of the U.S. Gulf of Mexico region. The assessment is based on geologic elements of a total petroleum system. Four...
Head-of-tide bottleneck of particulate material transport from watersheds to estuaries
Scott H. Ensign, Gregory E. Noe, Cliff R. Hupp, Katherine Skalak
2015, Geophysical Research Letters (42) 10671-10679
We measured rates of sediment, C, N, and P accumulation at four floodplain sites spanning the nontidal through oligohaline Choptank and Pocomoke Rivers, Maryland, USA. Ceramic tiles were used to collect sediment for a year and sediment cores were collected to derive decadal sedimentation rates using 137Cs. The results showed...
