Designing mark-recapture studies to reduce effects of distance weighting on movement distance distributions of stream fishes
B. Albanese, P. L. Angermeier, C. Gowan
2003, Transactions of the American Fisheries Society (132) 925-939
Mark-recapture studies generate biased, or distance-weighted, movement data because short distances are sampled more frequently than long distances. Using models and field data, we determined how study design affects distance weighting and the movement distributions of stream fishes. We first modeled distance weighting as a function of recapture section length...
Seismic velocity anisotropy and heterogeneity beneath the Mantle Electromagnetic and Tomography Experiment (MELT) region of the East Pacific Rise from analysis of P and S body waves
W.C. Hammond, D.R. Toomey
2003, Journal of Geophysical Research B: Solid Earth (108)
We use teleseismic P and S delay times and shear wave splitting measurements to constrain isotropic and anisotropic heterogeneity in the mantle beneath the southern East Pacific Rise (SEPR). The data comprise 462 P and S delay times and 18 shear wave splitting observations recorded during the Mantle Electromagnetic and...
Test of a Power Transfer Model for Standardized Electrofishing
L.E. Miranda, C.R. Dolan
2003, Transactions of the American Fisheries Society (132) 1179-1185
Standardization of electrofishing in waters with differing conductivities is critical when monitoring temporal and spatial differences in fish assemblages. We tested a model that can help improve the consistency of electrofishing by allowing control over the amount of power that is transferred to the fish. The primary objective was to...
The fate of wastewater-derived nitrate in the subsurface of the Florida Keys: Key Colony Beach, Florida
E.M. Griggs, L.R. Kump, J.K. Böhlke
2003, Estuarine, Coastal and Shelf Science (58) 517-539
Shallow injection is the predominant mode of wastewater disposal for most tourist-oriented facilities and some residential communities in the US Florida Keys National Marine Sanctuary. Concern has been expressed that wastewater nutrients may be escaping from the saline groundwater system into canals and surrounding coastal waters and perhaps to the...
Influence of landscape structure and climate variability on a late holocene plant migration
M.E. Lyford, S.T. Jackson, J.L. Betancourt, S.T. Gray
2003, Ecological Monographs (73) 567-583
We analyzed and radiocarbon-dated 205 fossil woodrat middens from 14 sites in central and northern Wyoming and adjacent Utah and Montana to document spatiotemporal patterns of Holocene invasion by Utah juniper (Juniperus osteosperma). Holocene migration into central and northern Wyoming and southern Montana from the south proceeded by a series...
Climate warming could reduce runoff significantly in New England, USA
T.G. Huntington
2003, Agricultural and Forest Meteorology (117) 193-201
The relation between mean annual temperature (MAT), mean annual precipitation (MAP) and evapotranspiration (ET) for 38 forested watersheds was determined to evaluate the potential increase in ET and resulting decrease in stream runoff that could occur following climate change and lengthening of the growing season. The watersheds were all predominantly...
Estimating black bear population density and genetic diversity at Tensas River, Louisiana using microsatellite DNA markers
Mark R. Boersen, Joseph D. Clark, Tim L. King
2003, Wildlife Society Bulletin (31) 197-207
The Recovery Plan for the federally threatened Louisiana black bear (Ursus americanus luteolus) mandates that remnant populations be estimated and monitored. In 1999 we obtained genetic material with barbed-wire hair traps to estimate bear population size and genetic diversity at the 329-km2 Tensas River Tract, Louisiana. We constructed and monitored...
Source mechanism of long-period events at Kusatsu-Shirane Volcano, Japan, inferred from waveform inversion of the effective excitation functions
M. Nakano, Hiroyuki Kumagai, B. A. Chouet
2003, Journal of Volcanology and Geothermal Research (122) 149-164
We investigate the source mechanism of long-period (LP) events observed at Kusatsu-Shirane Volcano, Japan, based on waveform inversions of their effective excitation functions. The effective excitation function, which represents the apparent excitation observed at individual receivers, is estimated by applying an autoregressive filter to the LP waveform. Assuming a point...
Analysis of potential debris flow source areas on Mount Shasta, California, by using airborne and satellite remote sensing data
J.K. Crowley, B.E. Hubbard, J.C. Mars
2003, Remote Sensing of Environment (87) 345-358
Remote sensing data from NASA's Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and the first spaceborne imaging spectrometer, Hyperion, show hydrothermally altered rocks mainly composed of natroalunite, kaolinite, cristobalite, and gypsum on both the Mount Shasta and Shastina cones. Field observations indicate that much of the visible altered rock consists of talus...
Hydrological response to earthquakes in the Haibara well, central Japan - I. Groundwater level changes revealed using state space decomposition of atmospheric pressure, rainfall and tidal responses
N. Matsumoto, G. Kitagawa, E.A. Roeloffs
2003, Geophysical Journal International (155) 885-898
For the groundwater level observed at the Haibara well, Shizuoka Prefecture, central Japan, time series analysis using state-space modelling is applied to extract hydrological anomalies related to earthquakes. This method can decompose observed groundwater level time series into five components: atmospheric pressure, tidal, and precipitation responses, observation noise, and residual...
Zebra mussels (Dreissena polymorpha) limit food for larval fish (Pimephales promelas) in turbulent systems: A bioenergetics analysis
L.A. Bartsch, W. B. Richardson, M.B. Sandheinrich
2003, Hydrobiologia (495) 59-72
We conducted a factorial experiment, in outdoor mesocosms, on the effects of zebra mussels and water column mixing (i.e., turbulence) on the diet, growth, and survival of larval fathead minnows (Pimephales promelas). Significant (P < 0.05) larval mortality occurred by the end of the experiment with the highest mortality (90%)...
Surface water qualit: Revisiting nitrate concentrations in the Des Moines River: 1945 and 1976-2001
G.F. McIsaac, R.D. Libra
2003, Journal of Environmental Quality (32) 2280-2289
Recent compilations of historical and contemporary riverine nitrate (NO3) concentrations indicate that concentrations in many rivers in the north-central USA increased during the second half of the 20th century. The Des Moines River near Des Moines, Iowa, however, was reported to have had similar NO3 concentrations in 1945 and the 1980s,...
Partitioning of water flux in a Sierra Nevada ponderosa pine plantation
M.R. Kurpius, J.A. Panek, N.T. Nikolov, M. McKay, Allen H. Goldstein
2003, Agricultural and Forest Meteorology (117) 173-192
The weather patterns of the west side of the Sierra Nevada Mountains (cold, wet winters and hot, dry summers) strongly influence how water is partitioned between transpiration and evaporation and result in a specific strategy of water use by ponderosa pine trees (Pinus ponderosa) in this region. To investigate how...
Probabilistic assessment methodology for continuous-type petroleum accumulations
R. A. Crovelli
2003, International Journal of Coal Geology (56) 45-48
The analytic resource assessment method, called ACCESS (Analytic Cell-based Continuous Energy Spreadsheet System), was developed to calculate estimates of petroleum resources for the geologic assessment model, called FORSPAN, in continuous-type petroleum accumulations. The ACCESS method is based upon mathematical equations derived from probability theory in the form of a computer...
Groundwater level changes in a deep well in response to a magma intrusion event on Kilauea Volcano, Hawai'i
S. Hurwitz, M.J.S. Johnston
2003, Geophysical Research Letters (30)
On May 21, 2001, an abrupt inflation of Kilauea Volcano's summit induced a rapid and large increase in compressional strain, with a maximum of 2 ??strain recorded by a borehole dilatometer. Water level (pressure) simultaneously dropped by 6 cm. This mode of water level change (drop) is in contrast to...
Biological structure and dynamics of fish assemblages in tributaries of eastern Lake Ontario
James E. McKenna Jr.
M. Munawar, editor(s)
2003, Book chapter, State of Lake Ontario: past, present and future
Interest in effective management of Great Lakes natural resources and restoration of native populations has stimulated interest in the conditions and ecological role of tributaries in the Great Lakes ecosystem. Rivers of Lake Ontario's eastern basin provide an excellent opportunity to examine important tributaries and their relationship to Lake...
Response signatures of four biological indicators to an iron and steel industrial landfill
Paul M. Stewart, Jason T. Butcher, Thomas P. Simon
Thomas P. Simon, editor(s)
2003, Book chapter, Macroinvertebrate assemblages associated with patterns in land use and water quality
Industrial landfills greatly modify surrounding areas by affecting chemical, physical, and biological integrity. Few data quantifying contaminant levels near landfills in sediments or in the organisms living near landfills exist. We examined several indicators of the aquatic community to determine whether a relationship existed between proximity to an industrial landfill...
Model of the porphyry copper and polymetallic vein family of deposits - Applications in Slovakia, Hungary, and Romania
L.J. Drew
2003, International Geology Review (45) 143-156
A tectonic model useful in estimating the occurrence of undiscovered porphyry copper and polymetallic vein systems has been developed. This model is based on the manner in which magmatic and hydrothermal fluids flow and are trapped in fault systems as far-field stress is released in tectonic strain features above subducting...
Modelling hydrologic responses in a small forested catchment (Panola Mountain, Georgia, USA): A comparison of the original and a new dynamic TOPMODEL
N.E. Peters, J. Freer, K. Beven
2003, Hydrological Processes (17) 345-362
Preliminary modelling results for a new version of the rainfall-runoff model TOPMODEL, dynamic TOPMODEL, are compared with those of the original TOPMODEL formulation for predicting streamflow at the Panola Mountain Research Watershed, Georgia. Dynamic TOPMODEL uses a kinematic wave routing of subsurface flow, which allows for dynamically variable upslope contributing...
Projecting global datasets to achieve equal areas
E.L. Usery, M.P. Finn, J.D. Cox, T. Beard, S. Ruhl, M. Bearden
2003, Cartography and Geographic Information Science (30) 69-79
Scientists routinely accomplish global modeling in the raster domain, but recent research has indicated that the transformation of large areas through map projection equations leads to errors. This research attempts to gauge the extent of map projection and resampling effects on the tabulation of categorical areas by comparing the results...
Neutron powder diffraction studies as a function of temperature of structure II hydrate formed from propane
C.J. Rawn, A.J. Rondinone, B.C. Chakoumakos, S. Circone, L.A. Stern, S. H. Kirby, Y. Ishii
2003, Canadian Journal of Physics (81) 431-438
Neutron powder diffraction data confirm that hydrate samples synthesized with propane crystallize as structure type II hydrate. The structure has been modeled using rigid-body constraints to describe C3H8 molecules located in the eight larger polyhedral cavities of a deuterated host lattice. Data were collected at 12, 40, 100, 130, 160,...
Apparent break in earthquake scaling due to path and site effects on deep borehole recordings
S. Ide, G. C. Beroza, S. G. Prejean, W.L. Ellsworth
2003, Journal of Geophysical Research B: Solid Earth (108)
We reexamine the scaling of stress drop and apparent stress, rigidity times the ratio between seismically radiated energy to seismic moment, with earthquake size for a set of microearthquakes recorded in a deep borehole in Long Valley, California. In the first set of calculations, we assume a constant Q and...
New K-Ar ages and the geologic evidence against rejuvenated-stage volcanism at Haleakalā, East Maui, a postshield-stage volcano of the Hawaiian island chain
David R. Sherrod, Yoshitomo Nishimitsu, Takahiro Tagami
2003, Geological Society of America Bulletin (115) 683-694
The postshield and previously inferred rejuvenated-stage history of Haleakalā volcano is reevaluated on the basis of 52 new K-Ar ages, 42 from the postshield Kula Volcanics and 10 from the overlying Hāna Volcanics. Postshield extrusion was robust from 0.93 to 0.76 Ma. A period of low extrusion rate or...
Grizzly bear
C.C. Schwartz, S.D. Miller, M.A. Haroldson
G. Feldhamer, B. Thompson, J. Chapman, editor(s)
2003, Book chapter, Wild Mammals of North America.
The grizzly bear inspires fear, awe, and respect in humans to a degree unmatched by any other North American wild mammal. Like other bear species, it can inflict serious injury and death on humans and sometimes does. Unlike the polar bear (Ursus maritimus) of the sparsely inhabited northern arctic, however,...
Serpentinization of abyssal peridotites from the MARK area, Mid-Atlantic Ridge: Sulfur geochemistry and reaction modeling
J.C. Alt, Wayne C. Shanks III
2003, Geochimica et Cosmochimica Acta (67) 641-653
The opaque mineralogy and the contents and isotope compositions of sulfur in serpentinized peridotites from the MARK (Mid-Atlantic Ridge, Kane Fracture Zone) area were examined to understand the conditions of serpentinization and evaluate this process as a sink for seawater sulfur. The serpentinites contain a sulfur-rich secondary mineral assemblage and...
