Fault locking, block rotation and crustal deformation in the Pacific Northwest
Robert McCaffrey, Anthony I. Qamar, Robert W. King, Ray E. Wells, G. Khazaradze, C.A. Williams, C.W. Stevens, J.J. Vollick, P.C. Zwick
2007, Geophysical Journal International (169) 1315-1340
We interpret Global Positioning System (GPS) measurements in the northwestern United States and adjacent parts of western Canada to describe relative motions of crustal blocks, locking on faults and permanent deformation associated with convergence between the Juan de Fuca and North American plates. To estimate angular velocities of the...
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...
Chronic Wasting Disease Positive Tissue Bank
Scott D. Wright
2007, Fact Sheet 2007-3059
In 2005, the USGS National Wildlife Health Center entered into an agreement with the Wyoming Game and Fish Department and the Department of Veterinary Sciences at the University of Wyoming to produce a collection of positive tissues from cervids intentionally infected with chronic wasting disease. This agreement was facilitated through...
Simulation of flow and habitat conditions under ice, Cache la Poudre River - January 2006
Terry Waddle
2007, Open-File Report 2007-1282
The U.S. Forest Service authorizes the occupancy and use of Forest Service lands by various projects, including water storage facilities, under the Federal Land Policy and Management Act. Federal Land Policy and Management Act permits can be renewed at the end of their term. The U.S. Forest Service analyzes the...
Chromosome painting in the manatee supports Afrotheria and Paenungulata
Margaret E. Kellogg, Sandra Burkett, Thomas R. Dennis, Gary Stone, Brian A. Gray, Peter M. McGuire, Roberto T. Zori, Roscoe Stanyon
2007, BMC Evolutionary Biology (7)
Background Sirenia (manatees, dugongs and Stellar's sea cow) have no evolutionary relationship with other marine mammals, despite similarities in adaptations and body shape. Recent phylogenomic results place Sirenia in Afrotheria and with elephants and rock hyraxes in Paenungulata. Sirenia and Hyracoidea are the two afrotherian orders as...
Mapping impervious surfaces using classification and regression tree algorithm
G. Xian
Q. Weng, editor(s)
2007, Book chapter, Remote sensing of impervious surfaces
No abstract available....
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...
Mountaintop island age determines species richness of boreal mammals in the American Southwest
J.K. Frey, M.A. Bogan, Terry L. Yates
2007, Ecography (30) 231-240
Models that describe the mechanisms responsible for insular patterns of species richness include the equilibrium theory of island biogeography and the nonequilibrium vicariance model. The relative importance of dispersal or vicariance in structuring insular distribution patterns can be inferred from these models. Predictions of the alternative models were tested for...
Toxicity of cobalt-complexed cyanide to Oncorhynchus mykiss, Daphnia magna, and Ceriodaphnia dubia: Potentiation by ultraviolet radiation and attenuation by dissolved organic carbon and adaptive UV tolerance
Edward E. Little, Robin D. Calfee, Peter M. Theodorakos, Zoe Ann Brown, Craig A. Johnson
2007, Environmental Science and Pollution Research (14) 333-337
BackgroundCobalt cyanide complexes often result when ore is treated with cyanide solutions to extract gold and other metals. These have recently been discovered in low but significant concentrations in effluents from gold leach operations. This study was conducted to determine the potential toxicity of cobalt-cyanide complexes to freshwater organisms and...
Tracking environmental dynamics and agricultural intensification in southern Mali
G. Gray Tappan, M. McGahuey
2007, Agricultural Systems (94) 38-51
The Office de la Haute Vallée du Fleuve Niger (OHVN) zone in southern Mali is a small but important agricultural production region. Against a background of environmental degradation including decades of declining rainfall, soil erosion, and human pressure on forest resources, numerous farming communities stand out through the use of...
Potential ecotoxicological significance of elevated concentrations of strontium in eggshells of passerine birds
Miguel A. Mora, Robert J. Taylor, Bryan L. Brattin
2007, Condor (109) 199-205
We investigated the occurrence and potential ecotoxicological significance of elevated concentrations of strontium (Sr) in eggshells of nine passerine birds from four regions in Arizona. Concentrations of Sr in eggshells ranged from 70 to 1360 µg g−1 dry weight (overall mean = 684 ± 345 SD µg g−1 dw) for the four...
Law of the sea, the continental shelf, and marine research
Deborah R. Hutchinson, Robert W. Rowland
2007, Eos, Transactions, American Geophysical Union (88) 237-240
The question of the amount of seabed to which a coastal nation is entitled is addressed in the United Nations Convention on the Law of the Sea (UNCLOS). This treaty, ratified by 153 nations and in force since 1994, specifies national obligations, rights, and jurisdiction in the oceans, and it...
High-resolution sequence stratigraphy of lower Paleozoic sheet sandstones in central North America: The role of special conditions of cratonic interiors in development of stratal architecture
Anthony C. Runkel, J.F. Miller, R.M. McKay, A. R. Palmer, John F. Taylor
2007, Geological Society of America Bulletin (119) 860-881
Well-known difficulties in applying sequence stratigraphic concepts to deposits that accumulated across slowly subsiding cratonic interior regions have limited our ability to interpret the history of continental-scale tectonism, oceanographic dynamics of epeiric seas, and eustasy. We used a multi-disciplinary approach to construct a high-resolution stratigraphic framework for lower Paleozoic strata...
Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada)
E.L. Zodrow, Maria Mastalerz
2007, International Journal of Coal Geology (70) 313-324
Multiple foliar specimens of the Late Pennsylvanian fossil pteridosperm [gymnosperm] Alethopteris zeilleri (Ragot) Wagner were collected from one restricted stratigraphical horizon in the Canadian Sydney Coalfield. Variability of functional-group distribution using FTIR technique was studied in compressions, adaxial versus abaxial cuticles, and in unseparated cuticles as a function of maceration...
Near-shore and offshore habitat use by endangered, juvenile Lost River and shortnose suckers in Upper Klamath Lake, Oregon. Annual report 2004
H.A. Hendrixson, B.L Herring, S. M. Burdick, S. P. VanderKooi
2007, Report
No abstract available ...
Influence of the diversion of Bear River into Bear Lake (Utah and Idaho) on the environment of deposition of carbonate minerals
W.E. Dean, R. M. Forester, Jordon Bright, R.Y. Anderson
2007, Limnology and Oceanography (52) 1094-1111
Bear River, the largest river in the Great Basin, had some of its flow diverted into Bear Lake through a series of canals constructed between 1911 and 1918, turning Bear Lake into a reservoir. The prediversion lake had an unusually high Mg2+ : Ca2+ ratio (38 by weight), which resulted...
Variation in winter diet of southern Beaufort Sea polar bears inferred from stable isotope analysis
T.W. Bentzen, Erich H. Follmann, Steven C. Amstrup, G.S. York, M. J. Wooller, T. M. O'Hara
2007, Canadian Journal of Zoology (85) 596-608
Ringed seals (Phoca hispida Schreber, 1775 = Pusa hispida (Schreber, 1775)) and bearded seals (Erignathus barbatus (Erxleben, 1777)) represent the majority of the polar bear (Ursus maritimus Phipps, 1774) annual diet. However, remains of lower trophic level bowhead whales (Balaena mysticetus L., 1758) are available in the southern Beaufort Sea and their dietary contribution to polar...
Modern foraminiferal facies in a subtropical estuarine channel, Bertioga, São Paulo, Brazil
P.P.B. Eichler, B.B. Eichler, L. B. De Miranda, A.R. Rodrigues
2007, Journal of Foraminiferal Research (37) 234-247
Numerical analyses of modern foraminiferal abundance and environmental data from the Bertioga Channel (Sa??o Paulo, Brazil) reveal multiple biofacies within an overall paralic setting. Despite its fisheries, mariculture and attraction to tourists, the environmental state of Bertioga Channel remains poorly studied. The present investigation is an attempt to partly fill...
Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau
S.E. McClurg, J.T. Petty, P. M. Mazik, J.L. Clayton
2007, Ecological Applications (17) 1087-1104
Restoration programs are expanding worldwide, but assessments of restoration effectiveness are rare. The objectives of our study were to assess current acid-precipitation remediation programs in streams of the Allegheny Plateau ecoregion of West Virginia (USA), identify specific attributes that could and could not be fully restored, and quantify temporal trends...
Current-use pesticides and organochlorine compounds in precipitation and lake sediment from two high-elevation national parks in the Western United States
M.A. Mast, W.T. Foreman, S.V. Skaates
2007, Archives of Environmental Contamination and Toxicology (52) 294-305
Current-use pesticides (CUPs) and banned organochlorine compounds (OCCs) were measured in precipitation (snowpack and rain) and lake sediments from two national parks in the Western United States to determine their occurrence and distribution in high-elevation environments. CUPs frequently detected in snow were endosulfan, dacthal, and chlorothalonil in concentrations ranging from...
A field assessment of the value of steady shape hydraulic tomography for characterization of aquifer heterogeneities
Geoffrey C. Bohling, James J. Butler Jr., Xiaoyong Zhan, Michael D. Knoll
2007, Water Resources Research (43)
Hydraulic tomography is a promising approach for obtaining information on variations in hydraulic conductivity on the scale of relevance for contaminant transport investigations. This approach involves performing a series of pumping tests in a format similar to tomography. We present a field‐scale assessment of hydraulic tomography in a porous aquifer,...
A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5
P. Herckes, J.A. Leenheer, J.L. Collett Jr.
2007, Atmospheric Chemistry and Physics Discussions (7) 8423-8453
Fine particulate matter (PM2.5) samples were collected during a three week winter period in Fresno (CA). A composite sample was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the aerosol samples was recovered...
Year-class formation of upper St. Lawrence River northern pike
B.M. Smith, J.M. Farrell, H.B. Underwood, S.J. Smith
2007, North American Journal of Fisheries Management (27) 481-491
Variables associated with year-class formation in upper St. Lawrence River northern pike Esox lucius were examined to explore population trends. A partial least-squares (PLS) regression model (PLS 1) was used to relate a year-class strength index (YCSI; 1974-1997) to explanatory variables associated with spawning and nursery areas (seasonal water level...
An evaluation of petrogenic hydrocarbons in northern Gulf of Alaska continental shelf sediments - The role of coastal oil seep inputs
J.W. Short, J.J. Kolak, J. R. Payne, G. K. Van Kooten
2007, Organic Geochemistry (38) 643-670
We compared hydrocarbons in water, suspended particulate matter (SPM), and riparian sediment collected from coastal watersheds along the Yakataga foreland with corresponding hydrocarbons in Gulf of Alaska benthic sediments. This comparison allows an evaluation of hydrocarbon contributions to marine sediments from natural oil seeps, coal and organic matter (e.g., kerogen)...
Sea otters in a dirty ocean
David A. Jessup, Melissa A. Miller, Christine Kreuder Johnson, Patricia A. Conrad, M. Tim Tinker, James A. Estes, Jonna A.K. Mazet
2007, Journal of the American Veterinary Medical Association (231) 1648-1652
No abstract available....
