Widespread detection of N, N-diethyl-m-toluamide in U.S. streams: Comparison with concentrations of pesticides, personal care products, and other organic wastewater compounds
Mark W. Sandstrom, D.W. Kolpin, E.M. Thurman, S.D. Zaugg
2005, Environmental Toxicology and Chemistry (24) 1029-1034
One of the most frequently detected organic chemicals in a nationwide study concerning the effects of wastewater on stream water quality conducted in the year 2000 was the widely used insect repellant N,N-diethyl-m-toluamide (DEET). It was detected at levels of 0.02 μg/L or greater in 73% of the stream sites...
Predicted sex ratio of juvenile Kemp's Ridley sea turtles captured near Steinhatchee, Florida
A.A. Geis, W.J. Barichivich, T. Wibbels, M. Coyne, A.M. Landry Jr., D. Owens
2005, Copeia 393-398
The Kemp's Ridley (Lepidochelys kempii) is one of the most endangered sea turtles in the world, and it possesses temperature-dependent sex determination (TSD). Sex ratios produced under TSD can vary widely and can affect the reproductive ecology of a population. Therefore, sex ratios produced from TSD are of ecological and...
Incorporating seepage losses into the unsteady streamflow equations for simulating intermittent flow along mountain front streams
R.G. Niswonger, David E. Prudic, G. Pohll, J. Constantz
2005, Water Resources Research (41) 1-16
Seepage losses along numerous mountain front streams that discharge intermittently onto alluvial fans and piedmont alluvial plains are an important source of groundwater in the Basin and Range Province of the Western United States. Determining the distribution of seepage loss along mountain front streams is important when assessing groundwater resources...
Rural cases of equine West Nile virus encephalomyelitis and the normalized difference vegetation index
M.P. Ward, B.H. Ramsay, K. Gallo
2005, Vector-Borne and Zoonotic Diseases (5) 181-188
Data from an outbreak (August to October, 2002) of West Nile virus (WNV) encephalomyelitis in a population of horses located in northern Indiana was scanned for clusters in time and space. One significant (p = 0.04) cluster of case premises was detected, occurring between September 4 and 10 in the...
The evolution of vertebrate Toll-like receptors
J.C. Roach, G. Glusman, L. Rowen, A. Kaur, M. K. Purcell, K.D. Smith, L.E. Hood, A. Aderem
2005, Proceedings of the National Academy of Sciences of the United States of America (102) 9577-9582
The complete sequences of Takifugu Toll-like receptor (TLR) loci and gene predictions from many draft genomes enable comprehensive molecular phylogenetic analysis. Strong selective pressure for recognition of and response to pathogen-associated molecular patterns has maintained a largely unchanging TLR recognition in all vertebrates. There are six major families of vertebrate...
Speciation and transport of newly deposited mercury in a boreal forest wetland: A stable mercury isotope approach
B.A. Branfireun, D. P. Krabbenhoft, H. Hintelmann, R. J. Hunt, J.P. Hurley, J.W.M. Rudd
2005, Water Resources Research (41)
As part of the Mercury Experiment to Assess Atmospheric Loadings in Canada and the United States (METAALICUS) the fate and transport of contemporary mercury (Hg) deposition in a boreal wetland was investigated using an experimentally applied stable mercury isotope. We applied high purity (99.2% ± 0.1) 202Hg(II) to a wetland plot...
A simulation of the hydrothermal response to the Chesapeake Bay bolide impact
W. E. Sanford
2005, Geofluids (5) 185-201
Groundwater more saline than seawater has been discovered in the tsunami breccia of the Chesapeake Bay impact Crater. One hypothesis for the origin of this brine is that it may be a liquid residual following steam separation in a hydrothermal system that evolved following the impact. Initial scoping calculations have...
Atmospheric dry deposition in the vicinity of the Salton Sea, California - I: Air pollution and deposition in a desert environment
R. Alonso, A. Bytnerowicz, W.I. Boarman
2005, Atmospheric Environment (39) 4671-4679
Air pollutant concentrations and atmospheric dry deposition were monitored seasonally at the Salton Sea, southern California. Measurements of ozone (O 3), nitric acid vapor (HNO3), ammonia (NH3), nitric oxide (NO), nitrogen dioxide (NO2) and sulfur dioxide (SO 2) were performed using passive samplers. Deposition rates of NO 3-, NH4+, Cl-,...
The distribution of phosphorus in Popes Creek, VA, and in the Pocomoke River, MD: Two watersheds with different land management practices in the Chesapeake Bay Basin
N.S. Simon, O.P. Bricker, W. Newell, J. McCoy, R. Morawe
2005, Water, Air, & Soil Pollution (164) 189-204
This paper compares phosphorus (P) concentrations in sediments from two watersheds, one with, and one without, intensive animal agriculture. The watersheds are in the coastal plain of the Chesapeake Bay and have similar physiographic characteristics. Agriculture in the Pocomoke River, MD, watershed supplied 2.7 percent of all broiler chickens produced...
Catch rates relative to angler party size with implications for monitoring angler success
L.E. Miranda
2005, Transactions of the American Fisheries Society (134) 1005-1010
Angler catch rates often are used to monitor angler success, assess the need for additional management actions, and evaluate the effectiveness of management practices. Potential linkages between catch rate and angler party size were examined to assess how party size might affect the use of catch rate as an index...
Time-dependent earthquake probabilities
J. Gomberg, M.E. Belardinelli, M. Cocco, P. Reasenberg
2005, Journal of Geophysical Research B: Solid Earth (110) 1-12
We have attempted to provide a careful examination of a class of approaches for estimating the conditional probability of failure of a single large earthquake, particularly approaches that account for static stress perturbations to tectonic loading as in the approaches of Stein et al. (1997) and Hardebeck (2004). We have...
Assembling an ignimbrite: Compositionally defined eruptive packages in the 1912 Valley of Ten Thousand Smokes ignimbrite, Alaska
J. Fierstein, C. J. N. Wilson
2005, Geological Society of America Bulletin (117) 1094-1107
The 1912 Valley of Ten Thousand Smokes (VTTS) ignimbrite was constructed from 9 compositionally distinct, sequentially emplaced packages, each with distinct proportions of rhyolite (R), dacite (D), and andesite (A) pumices that permit us to map package boundaries and flow paths from vent to distal extents. Changing pumice proportions and...
Arsenic-bearing pyrite and marcasite in the Fire Clay coal bed, Middle Pennsylvanian Breathitt Formation, eastern Kentucky
L.F. Ruppert, J.C. Hower, C.F. Eble
2005, International Journal of Coal Geology (63) 27-35
Arsenic concentrations determined on 11 lithotype samples from the Middle Pennsylvanian Breathitt Group Fire Clay coal bed, Leslie County, KY, range from 1 to 418 ppm (whole coal basis). The 11 lithotype samples, which vary in thickness from 4 to 18 cm, were sampled from a continuous 1.38 m channel...
Compositional maps of Saturn's moon Phoebe from imaging spectroscopy
R. N. Clark, R. H. Brown, R. Jaumann, D. P. Cruikshank, R.M. Nelson, B. J. Buratti, T. B. McCord, J. Lunine, K. H. Baines, G. Bellucci, J.-P. Bibring, F. Capaccioni, P. Cerroni, A. Coradini, V. Formisano, Y. Langevin, D. L. Matson, V. Mennella, P. D. Nicholson, B. Sicardy, Christophe Sotin, T.M. Hoefen, J. M. Curchin, G. Hansen, K. Hibbits, K.-D. Matz
2005, Nature (435) 66-69
The origin of Phoebe, which is the outermost large satellite of Saturn, is of particular interest because its inclined, retrograde orbit suggests that it was gravitationally captured by Saturn, having accreted outside the region of the solar nebula in which Saturn formed. By contrast, Saturn's regular satellites (with prograde, low-inclination,...
Response of seismicity to Coulomb stress triggers and shadows of the 1999 Mw=7.6 Chi-Chi, Taiwan, earthquake
K.-F. Ma, C.-H. Chan, R.S. Stein
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
The correlation between static Coulomb stress increases and aftershocks has thus far provided the strongest evidence that stress changes promote seismicity, a correlation that the Chi-Chi earthquake well exhibits. Several studies have deepened the argument by resolving stress changes on aftershock focal mechanisms, which removes the assumption that the aftershocks...
Identifying spawning behavior in Pacific halibut (Hippoglossus stenolepis) using electronic tags
A.C. Seitz, Brenda L. Norcross, D. Wilson, J.L. Nielsen
2005, Environmental Biology of Fishes (73) 445-451
Identifying spawning behavior in Pacific halibut, Hippoglossus stenolepis, is particularly challenging because they occupy a deep, remote environment during the spawning season. To identify spawning events, a method is needed in which direct observation by humans is not employed. Spawning behavior of seven other flatfish, species has been directly observed...
Forecasting the evolution of seismicity in southern California: Animations built on earthquake stress transfer
S. Toda, R.S. Stein, K. Richards-Dinger, S.B. Bozkurt
2005, Journal of Geophysical Research B: Solid Earth (110) 1-17
We develop a forecast model to reproduce the distibution of main shocks, aftershocks and surrounding seismicity observed during 1986-200 in a 300 ?? 310 km area centered on the 1992 M = 7.3 Landers earthquake. To parse the catalog into frames with equal numbers of aftershocks, we animate seismicity in...
LogCauchy, log-sech and lognormal distributions of species abundances in forest communities
Z.-Y. Yin, S.-L. Peng, H. Ren, Q. Guo, Z.-H. Chen
2005, Ecological Modelling (184) 329-340
Species-abundance (SA) pattern is one of the most fundamental aspects of biological community structure, providing important information regarding species richness, species-area relation and succession. To better describe the SA distribution (SAD) in a community, based on the widely used lognormal (LN) distribution model with exp(-x2) roll-off on Preston's octave scale,...
Trends in hydrophobic organic contaminants in urban and reference lake sediments across the United States, 1970-2001
P. C. Van Metre, B.J. Mahler
2005, Environmental Science & Technology (39) 5567-5574
A shift in national policy toward stronger environmental protection began in the United States in about 1970. Conversely, urban land use, population, energy consumption, and vehicle use have increased greatly since then. To assess the effects of these changes on water quality, the U.S. Geological Survey used sediment cores to...
A frictional population model of seismicity rate change
J. Gomberg, P. Reasenberg, M. Cocco, M.E. Belardinelli
2005, Journal of Geophysical Research B: Solid Earth (110) 1-10
We study models of seismicity rate changes caused by the application of a static stress perturbation to a population of faults and discuss our results with respect to the model proposed by Dieterich (1994). These models assume distribution of nucleation sites (e.g., faults) obeying rate-state frictional relations that fail at...
Ongoing hydrothermal heat loss from the 1912 ash-flow sheet, Valley of Ten Thousand Smokes, Alaska
N. Hogeweg, T. E. C. Keith, E.M. Colvard, S. E. Ingebritsen
2005, Journal of Volcanology and Geothermal Research (143) 279-291
The June 1912 eruption of Novarupta filled nearby glacial valleys on the Alaska Peninsula with ash-flow tuff (ignimbrite), and post-eruption observations of thousands of steaming fumaroles led to the name ‘Valley of Ten Thousand Smokes’ (VTTS). By the late 1980s most fumarolic activity had ceased, but the discovery of thermal...
Longer-term effects of selective thinning on microarthropod communities in a late-successional coniferous forest
Robert W. Peck, C. G. Niwa
2005, Environmental Entomology (34) 646-655
Microarthropod densities within late-successional coniferous forests thinned 16–41 yr before sampling were compared with adjacent unthinned stands to identify longer term effects of thinning on this community. Soil and forest floor layers were sampled separately on eight paired sites. Within the forest floor oribatid, mesostigmatid, and to a marginal extent,...
River nutrient loads and catchment size
S. V. Smith, D.P. Swaney, R. W. Buddemeier, M.R. Scarsbrook, M.A. Weatherhead, Christoph Humborg, H. Eriksson, F. Hannerz
2005, Biogeochemistry (75) 83-107
We have used a total of 496 sample sites to calibrate a simple regression model for calculating dissolved inorganic nutrient fluxes via runoff to the ocean. The regression uses the logarithms of runoff and human population as the independent variables and estimates the logarithms of dissolved inorganic nitrogen and phosphorus...
Solute transport and storage mechanisms in wetlands of the Everglades, south Florida
Judson W. Harvey, James E. Saiers, Jessica T. Newlin
2005, Water Resources Research (41)
Solute transport and storage processes in wetlands play an important role in biogeochemical cycling and in wetland water quality functions. In the wetlands of the Everglades, there are few data or guidelines to characterize transport through the heterogeneous flow environment. Our goal was to conduct a tracer study to help...
Diagenesis and late-stage porosity development in the Pennsylvanian Strawn Formation, Val Verde basin, Texas, U.S.A
K. David Newell, R.H. Goldstein, C. J. Burdick
2005, AAPG Memoir (48) 333-350
The Middle Pennsylvanian (Desmoinesian) Strawn Formation in the Trans-Pecos area of Texas was deposited during relative tectonic quiescence that prevailed before rapid infilling of the Val Verde Basin. It represents one of a series of backstepping carbonate ramps formed on the craton side of this foreland basin. Strawn Formation carbonate...
