Introduction
Peter D. Warwick
2007, Natural Resources Research (16) 243-244
The inevitable increase in demand and continuing depletion of accessible oil and gas resources during the 21st century will cause greater dependence on energy minerals such as coal, uranium, and unconventional sources of oil and natural gas to satisfy our increasing energy needs. The Energy Minerals Division (EMD) of the...
USGS assessment of undiscovered oil and gas resources for the Oligocene Frio and Anahuac formations, U.S. Gulf of Mexico coastal plain and state waters: Review of assessment units
Sharon M. Swanson, Alexander W. Karlsen, Peter D. Warwick
Lorcan Kennan, James Pindell, Norman C. Rosen, editor(s)
2007, Conference Paper, The Paleogene of the Gulf of Mexico and Caribbean basins: Processes, events, and petroleum systems
The Oligocene Frio and Anahuac formations were examined by the U.S. Geological Survey (USGS) as part of an assessment of technically recoverable undiscovered conventional and unconventional hydrocarbon resources in Paleogene and Neogene strata underlying the U.S. Gulf of Mexico Coastal Plain and state waters. Work included the identification of structural,...
Constancy of the relation between floc size and density in San Francisco Bay
N. K. Ganju, D. H. Schoellhamer, M.C. Murrell, J. W. Gartner, S.A. Wright
2007, Proceedings in Marine Science (8) 75-91
The size and density of fine-sediment aggregates, or flocs, govern their transport and depositional properties. While the mass and volume concentrations of flocs can be measured directly or by optical methods, they must be determined simultaneously to gain an accurate density measurement. Results are presented from a tidal cycle study in...
Upper triassic continental margin strata of the central alaska range: Implications for paleogeographic reconstruction
A.B. Till, A. G. Harris, B. R. Wardlaw, M. Mullen
2007, Special Paper of the Geological Society of America (431) 191-205
Remnants of a Late Triassic continental margin and ocean basin are scattered across central and southern Alaska. Little is known about the fundamental nature of the margin because most remnants have not been studied in detail and a protracted period of terrane accretion and margin-parallel translation has disrupted original...
Occurrence of the amphibian pathogen Batrachochytrium dendrobatidis in Pacific Northwestern USA
Christopher A. Pearl, E. L. Bull, D. E. Green, Jay Bowerman, M. J. Adams, A. Hyatt, W. Wente
2007, Journal of Herpetology (41) 145-149
Chytridiomycosis (infection by the fungus Batrachochytrium dendrobatidis) has been associated with amphibian declines in at least four continents. We report results of disease screens from 210 pond-breeding amphibians from 37 field sites in Oregon and Washington. We detected B. dendrobatidis on 28% of sampled amphibians, and and we found ->...
Efficacy of CPTH-treated egg baits for removing ravens
Peter S. Coates, Jack O. Spencer Jr., David J. Delehanty
2007, Human-Wildlife Conflicts (1) 224-234
Human-altered landscapes have provided resource subsidies for common ravens (Corvus corax) resulting in a substantial increase in raven abundance and distribution throughout the United States and Canada in the past 25 years. Ravens are effective predators of eggs and young of ground-nesting birds. During 2002–2005, we tested whether chicken egg baits...
Thamnophis hammondii foraging behavior
Edward L. Ervin, Robert N. Fisher
2007, Herpetological Review (38) 345-346
Thamnophis hammondii is considered one of the most aquatic of the gartersnakes and is closely associated with creeks and impoundments (Fitch 1940. Univ. California Publ. Zool. 44:1–150) with a diet consisting largely of both the larvae and transformed stages of amphibians (Spea, Bufo, Rana, Pseudacris) and small fish (Oncorhynchus, Gasterosteus,...
Subspecific variation in the widespread burl-forming Arctostaphylos glandulosa
Jon E. Keeley, Michael C. Vasey, V. Thomas Parker
2007, Madroño (54) 42-62
The genus Arctostaphylos consists mostly of chaparral shrubs known by the common name manzanita, and one of the widest ranging of these is A. glandulosa Eastw., distributed from Baja California to Oregon. Particularly in the southern half of its range it exhibits complex patterns of morphological variation that have long presented taxonomic challenges. Phenetic...
Seasonal and interannual variability in the taxonomic composition and production dynamics of phytoplankton assemblages in Crater Lake, Oregon
McIntire C. David, Gary L. Larson, Robert E. Truitt
2007, Hydrobiologia (574) 179-204
Taxonomic composition and production dynamics of phytoplankton assemblages in Crater Lake, Oregon, were examined during time periods between 1984 and 2000. The objectives of the study were (1) to investigate spatial and temporal patterns in species composition, chlorophyll concentration, and primary productivity relative to seasonal patterns of water circulation; (2)...
Occurrence and genetic typing of infectious hematopoietic necrosis virus in Kamchatka, Russia
S.L. Rudakova, Gael Kurath, E.V. Bochkova
2007, Diseases of Aquatic Organisms (75) 1-11
Infectious hematopoietic necrosis virus (IHNV) is a well known rhabdoviral pathogen of salmonid fish in North America that has become established in Asia and Europe. On the Pacific coast of Russia, IHNV was first detected in hatchery sockeye from the Kamchatka Peninsula in 2001. Results of virological examinations of over...
Survey of selected pathogens and blood parameters of northern yellowstone elk: Wolf sanitation effect implications
S. M. Barber-Meyer, P.J. White, L.D. Mech
2007, American Midland Naturalist (158) 369-381
The restoration or conservation of predators could reduce seroprevalences of certain diseases in prey if predation selectively removes animals exhibiting clinical signs. We assessed disease seroprevalences and blood parameters of 115 adult female elk (Cervus elaphus) wintering on the northern range of Yellowstone National Park [YNP] during 2000-2005 and compared...
Temporal analysis of floodwater volumes in New Orleans after Hurricane Katrina
Jodie Smith, James Rowland
2007, Circular 1306-3H
Satellite images from multiple sensors and dates were analyzed to measure the extent of flooding caused by Hurricane Katrina in the New Orleans, La., area. The flood polygons were combined with a high-resolution digital elevation model to estimate water depths and volumes in designated areas. The multiple satellite acquisitions enabled...
Effects of Hurricane Katrina’s storm surge on the quality of shallow aquifers near the northern shoreline of Lake Pontchartrain, southeastern Louisiana
Dan J. Tomaszewski, John K. Lovelace
2007, Circular 1306-7D
The U.S. Geological Survey (USGS) sampled 13 wells on the northern shoreline of Lake Pontchartrain to determine the effect of Hurricane Katrina-induced storm surge water on the shallow groundwater resources. Surge water entering damaged wells did not contaminate the entire aquifer; however, contamination did occur locally at well sites. Because...
Sediment deposition from Hurricane Rita on Hackberry Beach chenier in southwestern Louisiana
Stephen Faulkner, Wylie Barrow, Thomas Doyle, Michael Baldwin, Thomas Michot, Christopher Wells, Clint Jeske
2007, Circular 1306-6E
Hurricane Rita significantly impacted the chenier forests of southwestern Louisiana, an important habitat for Neotropical migratory birds. Sediment deposition was measured along transects at Hackberry Beach chenier, and Rita's effects on chenier structure and morphology were determined....
USGS humanitarian and geospatial response for search and rescue after Hurricanes Katrina and Rita
Steve Hartley
2007, Circular 1306-3A
The U.S. Geological Survey (USGS) assisted State and Federal agencies with humanitarian aid and geospatial analyses in support of search and rescue operations after Hurricanes Katrina and Rita....
Impacts of Hurricane Katrina on floodplain forests of the Pearl River
Stephen Faulkner, Wylie Barrow, Brady R. Couvillion, William Conner, Lori Randall, Michael Baldwin
2007, Circular 1306-6A
Floodplain forests are an important habitat for Neotropical migratory birds. Hurricane Katrina passed through the Pearl River flood plain shortly after making landfall. Field measurements on historical plots and remotely sensed data were used to assess the impact of Hurricane Katrina on the structure of floodplain forests of the Pearl...
The major hurricanes of 2005: A few facts
Gaye S. Farris
2007, Circular 1306-2B
The following is a compilation of storm terminology, categories, and names as well as the meteorological history, damage, and paths of Hurricanes Dennis, Katrina, Rita, and Wilma. This information is taken, except where noted, from the Web site and archives of the National Hurricane Center (NHC), a part of the...
Precipitation zones of west-central Nevada
Thomas J. Lopes, Rose L. Medina
2007, Journal of the Nevada Water Resources Association (4) 1-18
Whether Nevada can sustain its fast rate of growth depends in part on accurately quantifying the amount of water that is available, including precipitation. The Precipitation-Zone Method (PZM) is a way of estimating mean annual precipitation at any point. The PZM was developed using data from west-central Nevada and northeastern...
Environmental impact of Hurricane Katrina on Lake Pontchartrain
Thomas Heitmuller, Brian C. Perez
2007, Circular 1306-7G
Hurricane Katrina slammed the Louisiana-Mississippi Gulf Coast with 135-mi/hour (217-km/hour) winds and up to a 30-ft (9-m) storm surge. Lake Pontchartrain was further subjected to environmental threat by way of the millions of gallons of contaminated flood water that were pumped daily from the city of New Orleans into the...
Current and Future Science Plans for Restoring a Resilient Coast
2007, Circular 1306-8A
The overarching goal of U.S. Geological Survey (USGS) Gulf Coast science in the aftermath of the 2005 hurricane season will be to provide the scientific information, knowledge, and tools required to ensure that decisions about coastal land resource use, management practices, and future development in the coastal zone and adjacent...
Effects of Hurricanes Katrina and Rita on the chemistry of bottom sediments in Lake Pontchartrain, La.
Peter C. Van Metre, Arthur J. Horowitz, Barbara Mahler, William T. Foreman, Christopher C. Fuller, Mark R. Burkhardt, Kent A. Elrick, Edward T. Furlong, Stanley C. Skrobialowski, James J. Smith, Jennifer T. Wilson, Stephen D. Zaugg
2007, Circular 1306-7F
Concerns about the effect of pumping contaminated flood waters into Lake Pontchartrain following the hurricanes of 2005 prompted the U.S. Geological Survey (USGS) to sample street mud, canal-suspended sediment, and bottom sediment in Lake Pontchartain. The samples were analyzed for a wide variety of potential inorganic and organic contaminants. Results...
Understanding knowledge and perceptions of bats among residents of Fort Collins, Colorado
Natalie R. Sexton, Susan C. Stewart
2007, Open-File Report 2007-1245
As regional urbanization increases in Colorado, so do interactions between humans and wildlife. Where previous habitat has been reduced due to urbanization and development, a few bat species that easily adapt to new environments now roost in homes and buildings (Kunz and Reynolds, 2003). Bats frequently serve as reservoirs of...
Coupling chemical weathering with soil production across soil-mantled landscapes
B.C. Burke, A.M. Heimsath, A. F. White
2007, Earth Surface Processes and Landforms (32) 853-873
Soil-covered upland landscapes constitute a critical part of the habitable world. Our understanding of how they evolve as a function of different climatic, tectonic and geological regimes is important across a wide range of disciplines and depends, in part, on understanding the links between...
Identification of functional corridors with movement characteristics of brown bears on the Kenai Peninsula, Alaska
T.A. Graves, S. Farley, M.I. Goldstein, C. Servheen
2007, Landscape Ecology (22) 765-772
We identified primary habitat and functional corridors across a landscape using Global Positioning System (GPS) collar locations of brown bears (Ursus arctos). After deriving density, speed, and angular deviation of movement, we classified landscape function for a group of animals with a cluster analysis. We described areas with high amounts...
Larval exposure to 4-nonylphenol and 17β-estradiol affects physiological and behavioral development of seawater adaptation in Atlantic salmon smolts
Darrren T. Lerner, Bjorn Thrandur Bjornsson, Stephen D. McCormick
2007, Environmental Science & Technology (41) 4479-4485
Population declines of anadromous salmonids are attributed to anthropogenic disturbances including dams, commercial and recreational fisheries, and pollutants, such as estrogenic compounds. Nonylphenol (NP), a xenoestrogen, is widespread in the aquatic environment due to its use in agricultural, industrial, and household products. We exposed Atlantic salmon yolk-sac larvae to waterborne...
