Broad-scale predictors of canada lynx occurrence in eastern North America
C.L. Hoving, D.J. Harrison, W.B. Krohn, R.A. Joseph, M. O'Brien
2005, Journal of Wildlife Management (69) 739-751
The Canada lynx (Lynx canadensis) is listed as a threatened species throughout the southern extent of its geographic range in the United States. Most research on lynx has been conducted in the western United States and Canada; little is known about the ecology of lynx in eastern North America. To...
Wave spectral energy variability in the northeast Pacific
P.D. Bromirski, D.R. Cayan, R.E. Flick
2005, Journal of Geophysical Research C: Oceans (110) 1-15
The dominant characteristics of wave energy variability in the eastern North Pacific are described from NOAA National Data Buoy Center (NDBC) buoy data collected from 1981 to 2003. Ten buoys at distributed locations were selected for comparison based on record duration and data continuity. Long‐period (LP) [T > 12] s, intermediate‐period...
Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge
John Chadwick, M. Perfit, I. Ridley, I. Jonasson, G. Kamenov, W. Chadwick, R. Embley, Roux P. le, M. Smith
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
The interaction of the Juan de Fuca Ridge with the Cobb hot spot has had a considerable influence on the magmatism of the Axial Segment of the ridge, the second-order segment that overlies the hot spot. In addition to the construction of the large volcanic edifice of Axial Seamount, the...
Parallel Fortran-MPI software for numerical inversion of the Laplace transform and its application to oscillatory water levels in groundwater environments
X. Zhan
2005, Environmental Modelling and Software (20) 279-284
A parallel Fortran-MPI (Message Passing Interface) software for numerical inversion of the Laplace transform based on a Fourier series method is developed to meet the need of solving intensive computational problems involving oscillatory water level's response to hydraulic tests in a groundwater environment. The software is a parallel version of...
Landscape characteristics of Rhizophora mangle forests and propagule deposition in coastal environments of Florida (USA)
R. Sengupta, B. Middleton, C. Yan, M. Zuro, H. Hartman
2005, Landscape Ecology (20) 63-72
Field dispersal studies are seldom conducted at regional scales even though reliable information on mid-range dispersal distance is essential for models of colonization. The purpose of this study was to examine the potential distance of dispersal of Rhizophora mangle propagules by comparing deposition density with landscape characteristics of mangrove forests....
Strange bedfellows - A deep-water hermatypic coral reef superimposed on a drowned barrier island; Southern Pulley Ridge, SW Florida platform margin
B. D. Jarrett, A. C. Hine, R. B. Halley, D. F. Naar, S. D. Locker, A.C. Neumann, D. Twichell, C. Hu, B.T. Donahue, W.C. Jaap, D. Palandro, K. Ciembronowicz
2005, Marine Geology (214) 295-307
The southeastern component of a subtle ridge feature extending over 200 km along the western ramped margin of the south Florida platform, known as Pulley Ridge, is composed largely of a non-reefal, coastal marine deposit. Modern biostromal reef growth caps southern Pulley Ridge (SPR), making it the deepest hermatypic reef...
Structural evolution of fault zones in sandstone by multiple deformation mechanisms: Moab fault, southeast Utah
N.C. Davatzes, P. Eichhubl, A. Aydin
2005, Geological Society of America Bulletin (117) 135-148
Faults in sandstone are frequently composed of two classes of structures: (1) deformation bands and (2) joints and sheared joints. Whereas the former structures are associated with cataclastic deformation, the latter ones represent brittle fracturing, fragmentation, and brecciation. We investigated the distribution of these structures, their formation, and the underlying...
Assessing contaminant sensitivity of endangered and threatened aquatic species: Part I. Acute toxicity of five chemicals
F.J. Dwyer, F.L. Mayer, L.C. Sappington, D.R. Buckler, C.M. Bridges, I.E. Greer, D.K. Hardesty, C.E. Henke, C.G. Ingersoll, J.L. Kunz, D.W. Whites, T. Augspurger, D.R. Mount, K. Hattala, G.N. Neuderfer
2005, Archives of Environmental Contamination and Toxicology (48) 143-154
Assessment of contaminant impacts to federally identified endangered, threatened and candidate, and state-identified endangered species (collectively referred to as "listed" species) requires understanding of a species' sensitivities to particular chemicals. The most direct approach would be to determine the sensitivity of a listed species to a particular contaminant or perturbation....
Paleoproterozoic metamorphism in the northern Wyoming province: Implications for the assembly of Laurentia
P.A. Mueller, H.R. Burger, J. L. Wooden, J.B. Brady, J.T. Cheney, T.A. Hamrs, A.L. Heatherington, D.W. Mogk
2005, Journal of Geology (113) 169-179
U-Pb ages measured on zircons from the Tobacco Root Mountains and monazite from the Highland Mountains indicate that the northwestern Wyoming province experienced an episode of high-grade metamorphism at ???1.77 Ga. Leucosome emplaced in Archean gneisses from the Tobacco Root Mountains contains a distinctive population of zircons with an age...
"Sour gas" hydrothermal jarosite: Ancient to modern acid-sulfate mineralization in the southern Rio Grande Rift
V.W. Lueth, R. O. Rye, L. Peters
2005, Chemical Geology (215) 339-360
As many as 29 mining districts along the Rio Grande Rift in southern New Mexico contain Rio Grande Rift-type (RGR) deposits consisting of fluorite-barite??sulfide-jarosite, and additional RGR deposits occur to the south in the Basin and Range province near Chihuahua, Mexico. Jarosite occurs in many of these deposits as a...
Secondary sulfate minerals associated with acid drainage in the eastern US: Recycling of metals and acidity in surficial environments
J. M. Hammarstrom, R.R. Seal II, A. L. Meier, J.M. Kornfeld
2005, Chemical Geology (215) 407-431
Weathering of metal-sulfide minerals produces suites of variably soluble efflorescent sulfate salts at a number of localities in the eastern United States. The salts, which are present on mine wastes, tailings piles, and outcrops, include minerals that incorporate heavy metals in solid solution, primarily the highly soluble members of the...
Constraints on fault slip rates of the southern California plate boundary from GPS velocity and stress inversions
T.W. Becker, J.L. Hardebeck, G. Anderson
2005, Geophysical Journal International (160) 634-650
We use Global Positioning System (GPS) velocities and stress orientations inferred from seismicity to invert for the distribution of slip on faults in the southern California plate-boundary region. Of particular interest is how long-term slip rates are partitioned between the Indio segment of the San Andreas fault (SAF), the San...
Morphology and aging precision of statoliths from larvae of Columbia river basin lampreys
M.H. Meeuwig, J.M. Bayer
2005, North American Journal of Fisheries Management (25) 38-48
The general morphology and precision associated with age determination of statoliths from larval Pacific lampreys Lampetra tridentata and western brook lampreys L. richardsoni found within the Columbia River basin were examined. Significant positive correlations were observed between the size of left and right statoliths from individuals. Principal components analysis indicated...
New constraints on mechanisms of remotely triggered seismicity at Long Valley Caldera
E. E. Brodsky, S. G. Prejean
2005, Journal of Geophysical Research B: Solid Earth (110) 1-14
Regional-scale triggering of local earthquakes in the crust by seismic waves from distant main shocks has now been robustly documented for over a decade. Some of the most thoroughly recorded examples of repeated triggering of a single site from multiple, large earthquakes are measured in geothermal fields of the western...
Factors controlling tungsten concentrations in ground water, Carson Desert, Nevada
R. L. Seiler, K.G. Stollenwerk, J.R. Garbarino
2005, Applied Geochemistry (20) 423-441
n investigation of a childhood leukemia cluster by US Centers for Disease Control and Prevention revealed that residents of the Carson Desert, Nevada, are exposed to high levels of W and this prompted an investigation of W in aquifers used as drinking water sources. Tungsten concentrations in 100 ground water...
Physically modeling operative temperatures and evaporation rates in amphibians
P.E. Bartelt, C.R. Peterson
2005, Journal of Thermal Biology (30) 93-102
(1) We designed a physical model that simulates the thermal and evaporative properties of live Western toads (Bufo boreas). (2) In controlled tests, the model tracked the body temperature of live toads with an average error of 0.3±0.03 °C (test range=4–30 °C). (3) It estimated the evaporative water loss of live toads with...
Taxonomic relationships among Phenacomys voles as inferred by cytochrome b
M.R. Bellinger, S. M. Haig, E.D. Forsman, T.D. Mullins
2005, Journal of Mammalogy (86) 201-210
Taxonomic relationships among red tree voles (Phenacomys longicaudus longicaudus, P. l. silvicola), the Sonoma tree vole (P. pomo), the white-footed vole (P. albipes), and the heather vole (P. intermedius) were examined using 664 base pairs of the mitochondrial cytochrome b gene. Results indicate specific differences among red tree voles, Sonoma...
Effects of biotic and abiotic factors on the distribution of trout and salmon along a longitudinal stream gradient
Hoz Franco De La Franco, E. A., P. Budy
2005, Environmental Biology of Fishes (72) 379-391
We examined the influence of biotic and abiotic factors on the distribution, abundance, and condition of salmonid fishes along a stream gradient. We observed a longitudinal change in fish distribution with native cutthroat trout, Oncorhynchus clarki utah, and introduced brown trout, Salmo trutta, demonstrating a distinct pattern of allopatry. Cutthroat...
Biomass, production and woody detritus in an old coast redwood (Sequoia sempervirens) forest
R. T. Busing, T. Fujimori
2005, Plant Ecology (177) 177-188
We examined aboveground biomass dynamics, aboveground net primary production (ANPP), and woody detritus input in an old Sequoia sempervirens stand over a three-decade period. Our estimates of aboveground biomass ranged from 3300 to 5800 Mg ha-1. Stem biomass estimates ranged from 3000 to 5200 Mg ha-1. Stem biomass declined 7%...
Pliocene transpressional modification of depositional basins by convergent thrusting adjacent to the "Big Bend" of the San Andreas fault: An example from Lockwood Valley, southern California
K.S. Kellogg, S.A. Minor
2005, Tectonics (24) 1-12
The "Big Bend" of the San Andreas fault in the western Transverse Ranges of southern California is a left stepping flexure in the dextral fault system and has long been recognized as a zone of relatively high transpression compared to adjacent regions. The Lockwood Valley region, just south of the...
A physical model for strain accumulation in the San Francisco Bay Region
F. F. Pollitz, M. Nyst
2005, Geophysical Journal International (160) 302-317
Strain accumulation in tectonically active regions is generally a superposition of the effects of background tectonic loading, steady-state dislocation processes, such as creep, and transient deformation. In the San Francisco Bay region (SFBR), the most uncertain of these processes is transient deformation, which arises primarily in association with large earthquakes....
Surface water acidification responses and critical loads of sulfur and nitrogen deposition in Loch Vale watershed, Colorado
T.J. Sullivan, B.J. Cosby, K.A. Tonnessen, D. W. Clow
2005, Water Resources Research (41)
We evaluated the sensitivity of The Loch, a subalpine lake in Rocky Mountain National Park in Colorado, to acidification in response to increased atmospheric loading of sulfur (S) and nitrogen (N) using the Model of Acidification of Groundwater in Catchments (MAGIC). Lake water acid‐base chemistry was moderately sensitive to changes...
Fuel reduction and coarse woody debris dynamics with early season and late season prescribed fire in a Sierra Nevada mixed conifer forest
E. E. Knapp, Jon E. Keeley, E. A. Ballenger, T. J. Brennan
2005, Forest Ecology and Management (208) 383-397
Fire exclusion has led to an unnatural accumulation and greater spatial continuity of organic material on the ground in many forests. This material serves both as potential fuel for forest fires and habitat for a large array of forest species. Managers must balance fuel reduction to reduce wildfire hazard with...
Mapping and prediction of Coal Workers' Pneumoconiosis with bioavailable iron content in the bituminous coals
X. Huang, W. Li, M.D. Attfield, A. Nadas, K. Frenkel, R. B. Finkelman
2005, Environmental Health Perspectives (113) 964-968
Based on the first National Study of Coal Workers' Pneumoconiosis (CWP) and the U.S. Geological Survey database of coal quality, we show that the prevalence of CWP in seven coal mine regions correlates with levels of bioavailable iron (BAI) in the coals from that particular region (correlation coefficient r =...
Species-energy relationship in the deep sea: A test using the Quaternary fossil record
G. Hunt, T. M. Cronin, K. Roy
2005, Ecology Letters (8) 739-747
Little is known about the processes regulating species richness in deep-sea communities. Here we take advantage of natural experiments involving climate change to test whether predictions of the species-energy hypothesis hold in the deep sea. In addition, we test for the relationship between temperature and species richness predicted by a...
