Very rapid geomagnetic field change recorded by the partial remagnetization of a lava flow
Scott W. Bogue, Jonathan M.G. Glen
2010, Geophysical Research Letters (37)
A new paleomagnetic result from a lava flow with a distinctive, two-part remanence reinforces the controversial hypothesis that geomagnetic change during a polarity reversal can be much faster than normal. The 3.9-m-thick lava (“Flow 20”) is exposed in the Sheep Creek Range (north central Nevada) and was erupted during a...
Woodpecker densities in the big woods of Arkansas
J.D. Luscier, David G. Krementz
2010, Journal of Fish and Wildlife Management (1) 102-110
Sightings of the now-feared-extinct ivory-billed woodpecker Campephilus principalis in 2004 in the Big Woods of Arkansas initiated a series of studies on how to best manage habitat for this endangered species as well as all woodpeckers in the area. Previous work suggested that densities of other woodpeckers, particularly pileated Dryocopus...
Biological communities in San Francisco Bay track large‐scale climate forcing over the North Pacific
James E. Cloern, Kathryn Hieb, Teresa Jacobson, Bruno Sanso, Emanuele Di Lorenzo, Mark T. Stacey, John L. Largier, Wendy Meiring, William T Peterson, Thomas M. Powell, Monika Winder, Alan D. Jassby
2010, Geophysical Research Letters (37)
Long‐term observations show that fish and plankton populations in the ocean fluctuate in synchrony with large‐scale climate patterns, but similar evidence is lacking for estuaries because of shorter observational records. Marine fish and invertebrates have been sampled in San Francisco Bay since 1980 and exhibit large, unexplained population changes including...
New insight into lunar impact melt mobility from the LRO camera
Veronica J. Bray, Livio L. Tornabene, Laszlo P. Keszthelyi, Alfred S. McEwen, B. Ray Hawke, Thomas A. Giguere, Simon A. Kattenhorn, William B. Garry, Bashar Rizk, C.M. Caudill, Lisa R. Gaddis, Carolyn H. van der Bogert
2010, Geophysical Research Letters (37)
The Lunar Reconnaissance Orbiter Camera (LROC) is systematically imaging impact melt deposits in and around lunar craters at meter and sub-meter scales. These images reveal that lunar impact melts, although morphologically similar to terrestrial lava flows of similar size, exhibit distinctive features (e.g., erosional channels). Although generated in a single...
Foraging proficiency during the nonbreeding season of a specialized forager: are juvenile American Oystercatchers "bumble-beaks" compared to adults?
Christine E. Hand, Felicia J. Sanders, Patrick G.R. Jodice
2010, Condor (112) 670-675
In many species, immature individuals are less proficient at foraging than are adults, and this difference may be especially critical during winter when survival can be at its minimum. We investigated the foraging proficiency of adult and immature American Oystercatchers (Haematopus palliatus) during the nonbreeding season. Oystercatchers forage on prey...
Assessment and monitoring of recreation impacts and resource conditions on mountain summits: Examples from the Northern Forest, USA
Christopher A. Monz, Jeffrey L. Marion, Kelly A. Goonan, Robert E. Manning, Jeremy Wimpey, Christopher Carr
2010, Mountain Research and Development (30) 332-343
Mountain summits present a unique challenge to manage sustainably: they are ecologically important and, in many circumstances, under high demand for recreation and tourism activities. This article presents recent advances in the assessment of resource conditions and visitor disturbance in mountain summit environments, by drawing on examples from a multiyear,...
Thermal constraints to the sporogonic development and altitudinal distribution of avian malaria Plasmodium relictum in Hawai'i
Dennis A. LaPointe, M.L. Goff, Carter T. Atkinson
2010, Journal of Parasitology (96) 318-324
More than half of the Hawaiian honeycreepers (Drepanidinae) known from historical records are now extinct. Introduced mosquito-borne disease, in particular the avian malaria Plasmodium relictum, has been incriminated as a leading cause of extinction during the 20th century and a major limiting factor in the recovery of remaining species populations....
Evaluation of the extent of contamination caused by historical mining in catchments of central Colorado
Stan E. Church, David L. Fey, Richard B. Wanty, Travis S. Schmidt, T. L. Klein, Barnaby W. Rockwell, Carma A. San Juan
2010, Conference Paper, Geological Society of America Denver Annual Meeting
The U.S. Geological Survey conducted an assessment of stream water and sediment quality in central Colorado, an area of about 54,000 km2. The study area is focused on small tributary catchments in the Rocky Mountains. The Colorado Mineral belt, a northeast-trending mineralized zone that experienced base- and precious-metal mining at...
ARCTOS: a relational database relating specimens, specimen-based science, and archival documentation
Gordon H. Jarrell, Cindy A. Ramotnik, D.L. McDonald
2010, Conference Paper, Geological Society of America Annual Meeting
Data are preserved when they are perpetually discoverable, but even in the Information Age, discovery of legacy data appropriate to particular investigations is uncertain. Secure Internet storage is necessary but insufficient. Data can be discovered only when they are adequately described, and visibility increases markedly if the data are related...
Global mineral resource assessment: porphyry copper assessment of Mexico: Chapter A in Global mineral resource assessment
Jane M. Hammarstrom, Gilpin R. Robinson Jr., Steve Ludington, Floyd Gray, Benjamin J. Drenth, Francisco Cendejas-Cruz, Enrique Espinosa, Efren Perez-Segura, Martin Valencia-Moreno, Jose Luis Rodriguez-Castaneda, Rigobert Vasquez-Mendoza, Lukas Zürcher
2010, Scientific Investigations Report 2010-5090-A
Mineral resource assessments provide a synthesis of available information about distributions of mineral deposits in the Earth’s crust. A probabilistic mineral resource assessment of undiscovered resources in porphyry copper deposits in Mexico was done as part of a global mineral resource assessment. The purpose of the study was to (1)...
Biological water-quality assessment of selected streams in the Milwaukee Metropolitan Sewerage District Planning Area of Wisconsin, 2007
Barbara C. Scudder Eikenberry, Amanda H. Bell, Daniel J. Sullivan, Michelle A. Lutz, David A. Alvarez
2010, Scientific Investigations Report 2010-5166
Changes in the water quality of stream ecosystems in an urban area may manifest in conspicuous ways, such as in murky or smelly streamwater, or in less conspicuous ways, such as fewer native or pollution-sensitive organisms. In 2004, and again in 2007, the U.S. Geological Survey sampled stream organisms—algae, invertebrates,...
Potential effects of coalbed natural gas development on fish and aquatic resources
Aida M. Farag, David D. Harper, Anna C. Senecal, Arthur E. Hubert
K.J. Reddy, editor(s)
2010, Book chapter, Coalbed natural gas: Energy and environment
The purpose of this chapter is to provide a summary of issues and findings related to the potential effects of coalbed natural gas (CBNG) development on fish and other aquatic resources. We reviewed CBNG issues from across the United States and used the Powder River Basin of Wyoming as a...
Geologic map of the Maumee quadrangle, Searcy and Marion Counties, Arkansas
Kenzie J. Turner, Mark R. Hudson
2010, Scientific Investigations Map 3134
This map summarizes the geology of the Maumee 7.5-minute quadrangle in northern Arkansas. The map area is in the Ozark plateaus region on the southern flank of the Ozark dome. The Springfield Plateau, composed of Mississippian cherty limestone, overlies the Salem Plateau, composed of Ordovician carbonate and clastic rocks, with...
Constituent concentrations, loads, and yields to Beaver Lake, Arkansas, water years 1999-2008
Susan E. Bolyard, Jeanne L. De Lanois, W. Reed Green
2010, Scientific Investigations Report 2010-5181
Beaver Lake is a large, deep-storage reservoir used as a drinking-water supply and considered a primary watershed of concern in the State of Arkansas. As such, information is needed to assess water quality, especially nutrient enrichment, nutrient-algal relations, turbidity, and sediment issues within the reservoir system. Water-quality samples were collected...
Empirical models of wind conditions on Upper Klamath Lake, Oregon
Norman L. Buccola, Tamara M. Wood
2010, Scientific Investigations Report 2010-5201
Upper Klamath Lake is a large (230 square kilometers), shallow (mean depth 2.8 meters at full pool) lake in southern Oregon. Lake circulation patterns are driven largely by wind, and the resulting currents affect the water quality and ecology of the lake. To support hydrodynamic modeling of the lake and...
Estimation of the effects of land use and groundwater withdrawals on streamflow for the Pomperaug River, Connecticut
David M. Bjerklie, J. Jeffrey Starn, Claudia Tamayo
2010, Scientific Investigations Report 2010-5114
A precipitation runoff model for the Pomperaug River watershed, Connecticut was developed to address issues of concern including the effect of development on streamflow and groundwater recharge, and the implications of water withdrawals on streamflow. The model was parameterized using a strategy that requires a minimum of calibration and optimization...
Simulation of streamflow and suspended-sediment concentrations and loads in the lower Nueces River watershed, downstream from Lake Corpus Christi to the Nueces Estuary, South Texas, 1958-2008
Darwin J. Ockerman, Franklin T. Heitmuller
2010, Scientific Investigations Report 2010-5194
The U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers-Fort Worth District, City of Corpus Christi, Guadalupe-Blanco River Authority, San Antonio River Authority, and San Antonio Water System, developed, calibrated, and tested a Hydrological Simulation Program ? FORTRAN (HSPF) watershed model to simulate streamflow and suspended-sediment...
Sustainability of natural attenuation of nitrate in agricultural aquifers
Christopher T. Green, Barbara A. Bekins
2010, Fact Sheet 2010-3077
Increased concentrations of nitrate in groundwater in agricultural areas, coinciding with increased use of chemical and organic fertilizers, have raised concern because of risks to environmental and human health. At some sites, these problems are mitigated by natural attenuation of nitrate as a result of microbially mediated reactions. Results from...
Groundwater availability study for Guam; goals, approach, products, and schedule of activities
Stephen B. Gingerich, John W. Jenson
2010, Fact Sheet 2010-3084
An expected significant population increase on Guam has raised concern about the sustainability of groundwater resources. In response, the U.S. Geological Survey (USGS), in collaboration with the University of Guam's Water and Environmental Research Institute of the Western Pacific (WERI) and with funding from the U.S. Marine Corps (USMC), is...
Coastal circulation and sediment dynamics in Maunalua Bay, Oahu, Hawaii: Measurements of waves, currents, temperature, salinity, and turbidity: November 2008-February 2009
Curt D. Storlazzi, M. Katherine Presto, Joshua B. Logan, Michael E. Field
2010, Open-File Report 2010-1217
High-resolution measurements of waves, currents, water levels, temperature, salinity and turbidity were made in Maunalua Bay, southern Oahu, Hawaii, during the 2008–2009 winter to better understand coastal circulation, water-column properties, and sediment dynamics during a range of conditions (trade winds, kona storms, relaxation of trade winds, and south swells). A...
Nogales flood detention study
Laura M. Norman, Lainie Levick, D. Phillip Guertin, James Callegary, Jesus Quintanar Guadarrama, Claudia Zulema Gil Anaya, Andrea Prichard, Floyd Gray, Edgar Castellanos, Edgar Tepezano, Hans Huth, Prescott Vandervoet, Saul Rodriguez, Jose Nunez, Donald Atwood, Gilberto Patricio Olivero Granillo, Francisco Octavio Gastellum Ceballos
2010, Open-File Report 2010-1262
Flooding in Ambos Nogales often exceeds the capacity of the channel and adjacent land areas, endangering many people. The Nogales Wash is being studied to prevent future flood disasters and detention features are being installed in tributaries of the wash. This paper describes the application of the KINEROS2 model and...
Susceptibility of three stocks of pacific herring to viral hemorrhagic septicemia
P.K. Hershberger, J.L. Gregg, C.A. Grady, R.M. Collins
2010, Journal of Aquatic Animal Health (22)
Laboratory challenges using specific-pathogen-free Pacific herring Clupea pallasii from three distinct populations indicated that stock origin had no effect on susceptibility to viral hemorrhagic septicemia (VHS). All of the populations were highly susceptible to the disease upon initial exposure, with significantly greater cumulative mortalities occurring in the exposed treatment groups...
Groundwater resources of the East Mountain area, Bernalillo, Sandoval, Santa Fe, and Torrance Counties, New Mexico, 2005
James R. Bartolino, Scott K. Anderholm, Nathan C. Myers
2010, Scientific Investigations Report 2009-5204
The groundwater resources of about 400 square miles of the East Mountain area of Bernalillo, Sandoval, Santa Fe, and Torrance Counties in central New Mexico were evaluated by using groundwater levels and water-quality analyses, and updated geologic mapping. Substantial development in the study area (population increased by 11,000, or 50...
Dissolved organic carbon export and internal cycling in small, headwater lakes
Edward G. Stets, Robert G. Striegl, George R. Aiken
2010, Global Biogeochemical Cycles (24) 1-12
Carbon (C) cycling in freshwater lakes is intense but poorly integrated into our current understanding of overall C transport from the land to the oceans. We quantified dissolved organic carbon export (DOCX) and compared it with modeled gross DOC mineralization (DOCR) to determine whether hydrologic or within-lake processes dominated DOC...
Temporal and spatial distribution of endangered juvenile Lost River and shortnose suckers in relation to environmental variables in Upper Klamath Lake, Oregon: 2009 annual data summary
Jared L. Bottcher, Summer M. Burdick
2010, Open-File Report 2010-1261
Lost River sucker (Deltistes luxatus) and shortnose sucker (Chasmistes brevirostris) were listed as endangered in 1988 for a variety of reasons including apparent recruitment failure. Upper Klamath Lake, Oregon, and its tributaries are considered the most critical remaining habitat for these two species. Age-0 suckers are often abundant in Upper...
