Survival and tag retention of Pacific lamprey larvae and macrophthalmia marked with coded wire tags
M.H. Meeuwig, A.L. Puls, J.M. Bayer
2007, North American Journal of Fisheries Management (27) 96-102
We examined the survival, tag retention, and growth of Pacific lamprey Lampetra tridentata larvae and macrophthalmia marked with standard-length decimal coded wire tags and exposed to two levels of handling stress. The survival of marked individuals did not differ from that of unmarked individuals at either life stage for the...
Remote camera-trap methods and analyses reveal impacts of rangeland management on Namibian carnivore communities
M. J. Kauffman, M. Sanjayan, J. Lowenstein, A. Nelson, R.M. Jeo, K.R. Crooks
2007, Oryx (41) 70-78
Assessing the abundance and distribution of mammalian carnivores is vital for understanding their ecology and providing for their long-term conservation. Because of the difficulty of trapping and handling carnivores many studies have relied on abundance indices that may not accurately reflect real abundance and distribution patterns. We developed statistical analyses...
Seasonal nutrient and plankton dynamics in a physical-biological model of Crater Lake
K. Fennel, R. Collier, G. Larson, G. Crawford, E. Boss
2007, Hydrobiologia (574) 265-280
A coupled 1D physical-biological model of Crater Lake is presented. The model simulates the seasonal evolution of two functional phytoplankton groups, total chlorophyll, and zooplankton in good quantitative agreement with observations from a 10-year monitoring study. During the stratified period in summer and early fall the model displays a marked...
A regression model to estimate regional ground water recharge
D. L. Lorenz, G. N. Delin
2007, Ground Water (45) 196-208
A regional regression model was developed to estimate the spatial distribution of ground water recharge in subhumid regions. The regional regression recharge (RRR) model was based on a regression of basin-wide estimates of recharge from surface water drainage basins, precipitation, growing degree days (GDD), and average basin specific yield (SY)....
Characteristics of roost sites used by burrowing owls (Athene cunicularia) wintering in Southern Texas
D.L. Williford, M.C. Woodin, M.K. Skoruppa, G.C. Hickman
2007, Southwestern Naturalist (52) 60-66
The western burrowing owl (Athene cunicularia hypugaea) is threatened in Mexico, endangered in Canada, and declining in most of the western United States. Most previous research has focused on burrowing owl breeding biology, and little is known about its winter ecology. We determined characteristics of roost sites used by western...
Thermal infrared reflectance and emission spectroscopy of quartzofeldspathic glasses
J.M. Byrnes, M.S. Ramsey, P.L. King, R.J. Lee
2007, Geophysical Research Letters (34)
This investigation seeks to better understand the thermal infrared (TIR) spectral characteristics of naturally-occurring amorphous materials through laboratory synthesis and analysis of glasses. Because spectra of glass phases differ markedly from their mineral counterparts, examination of glasses is important to accurately determine the composition of amorphous surface materials using remote...
Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving
W.R. Selbig, R. Bannerman, G. Bowman
2007, Journal of Environmental Quality (36) 226-232
Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and...
Climate correlates of 20 years of trophic changes in a high-elevation riparian system
T. E. Martin
2007, Ecology (88) 367-380
The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study....
Geostatistical three-dimensional modeling of oolite shoals, St. Louis Limestone, southwest Kansas
L. Qi, T.R. Carr, R.H. Goldstein
2007, American Association of Petroleum Geologists Bulletin (91) 69-96
In the Hugoton embayment of southwestern Kansas, reservoirs composed of relatively thin (<4 m; <13.1 ft) oolitic deposits within the St. Louis Limestone have produced more than 300 million bbl of oil. The geometry and distribution of oolitic deposits control the heterogeneity of the reservoirs, resulting in exploration challenges and...
Prioritizing bottomland hardwood forest sites for protection and augmentation
J. Carter, J. Biagas
2007, Natural Areas Journal (27) 72-82
Bottomland hardwood forest has been greatly diminished by conversion to agriculture. Less than 25% of the pre-Columbian bottomland hardwood forests remain in the southeastern United States. Because of the valuable ecological and hydrological functions performed by these forests, their conservation and restoration has been a high priority. Part of these...
Surface drifter derived circulation in the northern and middle Adriatic Sea: Response to wind regime and season
L. Ursella, P.-M. Poulain, R. P. Signell
2007, Journal of Geophysical Research C: Oceans (112)
More than 120 satellite-tracked drifters were deployed in the northern and middle Adriatic (NMA) Sea between September 2002 and November 2003, with the purpose of studying the surface circulation at mesoscale to seasonal scale in relation to wind forcing, river runoff, and bottom topography. Pseudo-Eulerian and Lagrangian statistics were calculated...
Modelingevapotranspirationina sub-tropical climate
M.R. Savabi, T.A. Cochrane, E. German, C. Ikiz, N. Cockshutt
2007, Journal of Environmental Hydrology (15) 1-15
Evapotranspiration (ET) loss is estimated at about 80-85% of annual precipitation in South Florida. Accurate prediction of ET is important during and beyond the implementation of the Comprehensive Everglades Restoration Plan (CERP). In the USDA's Everglades Agro-Hydrology Model (EAHM) the soil water intake is linked with the soil water redistribution,...
Ground-penetrating radar: A tool for monitoring bridge scour
N.L. Anderson, A.M. Ismael, T. Thitimakorn
2007, Environmental & Engineering Geoscience (13) 1-10
Ground-penetrating radar (GPR) data were acquired across shallow streams and/or drainage ditches at 10 bridge sites in Missouri by maneuvering the antennae across the surface of the water and riverbank from the bridge deck, manually or by boat. The acquired two-dimensional and three-dimensional data sets accurately image the channel bottom,...
Influence of tectonic folding on rockfall susceptibility, American Fork Canyon, Utah, USA
J. A. Coe, E. L. Harp
2007, Natural Hazards and Earth System Sciences (7) 1-14
We examine rockfall susceptibility of folded strata in the Sevier fold-thrust belt exposed in American Fork Canyon in north-central Utah. Large-scale geologic mapping, talus production data, rock-mass-quality measurements, and historical rockfall data indicate that rockfall susceptibility is correlated with limb dip and curvature of the folded, cliff-forming Mississippian limestones. On...
Earthquake likelihood model testing
D. Schorlemmer, M.C. Gerstenberger, S. Wiemer, D.D. Jackson, D.A. Rhoades
2007, Seismological Research Letters (78) 17-29
INTRODUCTIONThe Regional Earthquake Likelihood Models (RELM) project aims to produce and evaluate alternate models of earthquake potential (probability per unit volume, magnitude, and time) for California. Based on differing assumptions, these models are produced to test the validity of their assumptions and to explore which models should be incorporated...
Foraging patterns of Caspian terns and double-crested cormorants in the Columbia River estuary
Donald E. Lyons, D.D. Roby, K. Collis
2007, Northwest Science (81) 91-103
We examined spatial and temporal foraging patterns of Caspian terns and double-crested cormorants nesting in the Columbia River estuary, to potentially identify circumstances where juvenile salmonids listed under the U.S. Endangered Species Act might be more vulnerable to predation by these avian piscivores. Data were collected during the 1998 and...
Sensitivity of high-frequency Rayleigh-wave data revisited
J. Xia, R. D. Miller, J. Ivanov
2007, Conference Paper, SEG Technical Program Expanded Abstracts
Rayleigh-wave phase velocity of a layered earth model is a function of frequency and four groups of earth properties: P-wave velocity, S-wave velocity (Vs), density, and thickness of layers. Analysis of the Jacobian matrix (or the difference method) provides a measure of dispersion curve sensitivity to earth properties. Vs is...
Costimulatory receptors in jawed vertebrates: Conserved CD28, odd CTLA4 and multiple BTLAs
D. Bernard, J.D. Hansen, Pasquier L. Du, M.-P. Lefranc, A. Benmansour, P. Boudinot
2007, Developmental and Comparative Immunology (31) 255-271
CD28 family of costimulatory receptors is comprised of molecules with a single V-type extracellular Ig domain, a transmembrane and an intracytoplasmic region with signaling motifs. CD28 and cytotoxic T lymphocyte antigen-4 (CTLA4) homologs have been recently identified in rainbow trout. Other sequences similar to mammalian CD28 family members have now...
Relationships between reef fish communities and remotely sensed rugosity measurements in Biscayne National Park, Florida, USA
Ilsa B. Kuffner, John Brock, Rikki Grober-Dunsmore, Victor E. Bonito, T. Donald Hickey, C. Wayne Wright
2007, Environmental Biology of Fishes (78) 71-82
The realization that coral reef ecosystem management must occur across multiple spatial scales and habitat types has led scientists and resource managers to seek variables that are easily measured over large areas and correlate well with reef resources. Here we investigate the utility of new technology in airborne laser surveying...
Influence of land use and climate on wetland breeding birds in the Prairie Pothole region of Canada
G.M. Forcey, G.M. Linz, W.E. Thogmartin, W.J. Bleier
2007, Canadian Journal of Zoology (85) 421-436
Bird populations are influenced by a variety of factors at both small and large scales that range from the presence of suitable nesting habitat, predators, and food supplies to climate conditions and land-use patterns. We evaluated the influences of regional climate and land-use variables on wetland breeding birds in the...
Natural landscape and stream segment attributes influencing the distribution and relative abundance of riverine smallmouth bass in Missouri
S.K. Brewer, C.F. Rabeni, S.P. Sowa, G. Annis
2007, North American Journal of Fisheries Management (27) 326-341
Protecting and restoring fish populations on a regional basis are most effective if the multiscale factors responsible for the relative quality of a fishery are known. We spatially linked Missouri's statewide historical fish collections to environmental features in a geographic information system, which was used as a basis for modeling...
Three-dimensional P-wave velocity structure derived from local earthquakes at the Katmai group of volcanoes, Alaska
A.D. Jolly, S.C. Moran, S.R. McNutt, D.B. Stone
2007, Journal of Volcanology and Geothermal Research (159) 326-342
The three-dimensional P-wave velocity structure beneath the Katmai group of volcanoes is determined by inversion of more than 10,000 rays from over 1000 earthquakes recorded on a local 18 station short-period network between September 1996 and May 2001. The inversion is well constrained from sea level to about 6 km below...
Aquifer-scale controls on the distribution of nitrate and ammonium in ground water near La Pine, Oregon, USA
Stephen R. Hinkle, John Karl Bohlke, John H. Duff, David S. Morgan, Rodney J. Weick
2007, Journal of Hydrology (333) 486-503
Geochemical and isotopic tools were applied at aquifer, transect, and subtransect scales to provide a framework for understanding sources, transport, and fate of dissolved inorganic N in a sandy aquifer near La Pine, Oregon. NO3 is a common contaminant in shallow ground water in this area, whereas high concentrations of...
Comparative lahar hazard mapping at Volcan Citlaltépetl, Mexico using SRTM, ASTER and DTED-1 digital topographic data
Bernard E. Hubbard, Michael F. Sheridan, Gerardo Carrasco-Nunez, Rodolfo Diaz-Castellon, Sergio R. Rodriguez
2007, Journal of Volcanology and Geothermal Research (160) 99-124
In this study, we evaluated and compared the utility of spaceborne SRTM and ASTER DEMs with baseline DTED-1 “bald-earth” topography for mapping lahar inundation hazards from volcan Citlaltépetl, Mexico, a volcano which has had a history of producing debris flows of various extents. In particular, we tested the utility...
Early marine growth in relation to marine-stage survival rates for Alaska sockeye salmon (Oncorhynchus nerka)
Edward V. Farley Jr., J.M. Murphy, Milo D. Adkison, Lisa B. Eisner, J.H. Helle, J.H. Moss, Jennifer L. Nielsen
2007, Fishery Bulletin (105) 121-130
We tested the hypothesis that larger juvenile sockeye salmon (Oncorhynchus nerka) in Bristol Bay, Alaska, have higher marine-stage survival rates than smaller juvenile salmon. We used scales from returning adults (33 years of data) and trawl samples of juveniles (n= 3572) collected along the eastern Bering Sea shelf during August...
