Temporal variability of submarine groundwater discharge: Assessments via radon and seep meters, the southern carmel coast, Israel
Y. Weinstein, Y. Shalem, W. C. Burnett, P.W. Swarzenski, B. Herut
2007, Conference Paper, IAHS-AISH Publication
Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (averages of 34, 10.4 and 1.5 cm d-1 in March, May and July, respectively), while estimates based on radon time series showed remarkably uniform averages (8 cm d-1)....
Fall migration and habitat use of American woodcock in the central United States
N.A. Myatt, D.G. Krementz
2007, Journal of Wildlife Management (71) 1197-1205
Little is known about the migration ecology of the American woodcock (Scolopax minor). From 2001 to 2003, we began a 3-year study to document woodcock fall migration routes, rates, and habitat use from Minnesota, Wisconsin, and Michigan, USA. Some 586 radiomarked woodcock initiated migration. During 224 hours of aerial telemetry,...
Analysis of the sea otter (Enhydra lutris) reproductive tract: A methods manual
Vanessa R. von Biela, Verena A. Gill
2007, Technical Report MMM 2007-002
Reproduction in the female sea otter, Enhydra lutris, was relatively unstudied until Sinha et al. (1966) examined 140 reproductive tracts collected 1955-62 and used their findings to describe sea otter reproductive anatomy and biology. Two years later Sinha and Conaway (1968) published a more detailed paper on the ovary of...
Evapotranspiration in a cottonwood (Populus fremontii) restoration plantation estimated by sap flow and remote sensing methods
P. Nagler, A. Jetton, J. Fleming, K. Didan, E. Glenn, J. Erker, K. Morino, J. Milliken, S. Gloss
2007, Agricultural and Forest Meteorology (144) 95-110
Native tree plantations have been proposed for the restoration of wildlife habitat in human-altered riparian corridors of western U.S. rivers. Evapotranspiration (ET) by riparian vegetation is an important, but poorly quantified, term in river water budgets. Native tree restoration plots will potentially increase ET. We used sap flow sensors and...
Seismoelectric imaging of shallow targets
S.S. Haines, S.R. Pride, S.L. Klemperer, B. Biondi
2007, Geophysics (72)
We have undertaken a series of controlled field experiments to develop seismoelectric experimental methods for near-surface applications and to improve our understanding of seismoelectric phenomena. In a set of off-line geometry surveys (source separated from the receiver line), we place seismic sources and electrode array receivers on opposite sides of...
Management of fluid mud in estuaries, bays, and lakes. II: Measurement, modeling, and management
W.H. McAnally, A. Teeter, David H. Schoellhamer, C. Friedrichs, D. Hamilton, E. Hayter, P. Shrestha, H. Rodriguez, A. Sheremet, R. Kirby
2007, Journal of Hydraulic Engineering (133) 23-38
Techniques for measurement, modeling, and management of fluid mud are available, but research is needed to improve them. Fluid mud can be difficult to detect, measure, or sample, which has led to new instruments and new ways of using existing instruments. Multifrequency acoustic fathometers sense neither density...
Multiobjective analysis of a public wellfield using artificial neural networks
E.A. Coppola Jr., F. Szidarovszky, D. Davis, S. Spayd, M.M. Poulton, E. Roman
2007, Ground Water (45) 53-61
As competition for increasingly scarce ground water resources grows, many decision makers may come to rely upon rigorous multiobjective techniques to help identify appropriate and defensible policies, particularly when disparate stakeholder groups are involved. In this study, decision analysis was conducted on a public water supply wellfield to balance water...
Use of mammal manure by nesting burrowing owls: a test of four functional hypotheses
M. D. Smith, C.J. Conway
2007, Animal Behaviour (73) 65-73
Animals have evolved an impressive array of behavioural traits to avoid depredation. Olfactory camouflage of conspicuous odours is a strategy to avoid depredation that has been implicated only in a few species of birds. Burrowing owls, Athene cunicularia, routinely collect dried manure from mammals and scatter it in their nest...
Distinguishing centrarchid genera by use of lateral line scales
N.M. Roberts, C.F. Rabeni, J.S. Stanovick
2007, North American Journal of Fisheries Management (27) 215-219
Predator-prey relations involving fishes are often evaluated using scales remaining in gut contents or feces. While several reliable keys help identify North American freshwater fish scales to the family level, none attempt to separate the family Centrarchidae to the genus level. Centrarchidae is of particular concern in the midwestern United...
Mass balances of mercury and nitrogen in burned and unburned forested watersheds at Acadia National Park, Maine, USA
S.J. Nelson, K.B. Johnson, J. S. Kahl, T.A. Haines, I.J. Fernandez
2007, Environmental Monitoring and Assessment (126) 69-80
Precipitation and streamwater samples were collected from 16 November 1999 to 17 November 2000 in two watersheds at Acadia National Park, Maine, and analyzed for mercury (Hg) and dissolved inorganic nitrogen (DIN, nitrate plus ammonium). Cadillac Brook watershed burned in a 1947 fire that destroyed vegetation and soil organic matter....
Mount St. Helens Petrology Workshop
Michael C. Rowe, John S. Pallister, Anita L. Grunder
2007, Eos, Transactions, American Geophysical Union (88) 15-15
Following seismic activity in late September 2004, the current eruption of Mount St. Helens began with an explosive steam and ash emission on 1 October 2004, with hot dacite emerging from the crater floor on 11 October 2004. Nearly two years later, with more than 80 million cubic meters of...
Optimal management of non-Markovian biological populations
B. Kenneth Williams
2007, Ecological Modelling (200) 234-242
Wildlife populations typically are described by Markovian models, with population dynamics influenced at each point in time by current but not previous population levels. Considerable work has been done on identifying optimal management strategies under the Markovian assumption. In this paper we generalize this work to non-Markovian systems, for which...
Modeling pesticide fate in a small tidal estuary
A.M. McCarthy, J. D. Bales, W.G. Cope, D. Shea
2007, Ecological Modelling (200) 149-159
The exposure analysis modeling system (EXAMS), a pesticide fate model developed by the U.S. Environmental Protection Agency, was modified to model the fate of the herbicides atrazine and metolachlor in a small tidally dominated estuary (Bath Creek) in North Carolina, USA where freshwater inflow accounts for only 3% of the...
Landslide susceptibility revealed by LIDAR imagery and historical records, Seattle, Washington
W.H. Schulz
2007, Engineering Geology (89) 67-87
Light detection and ranging (LIDAR) data were used to visually map landslides, headscarps, and denuded slopes in Seattle, Washington. Four times more landslides were mapped than by previous efforts that used aerial photographs. The mapped landforms (landslides, headscarps, and denuded slopes) were created by many individual landslides. The spatial distribution...
Comprehensive characterization of atmospheric organic matter in Fresno, California fog water
P. Herckes, J.A. Leenheer, J.L. Collett Jr.
2007, Environmental Science & Technology (41) 393-399
Fogwater collected during winter in Fresno (CA) 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 fogwater was recovered and characterized. The most abundant isolated fractions were those comprised of volatile acids...
Role of burning season on initial understory vegetation response to prescribed fire in a mixed conifer forest
E. E. Knapp, D.W. Schwilk, J.M. Kane, Jon E. Keeley
2007, Canadian Journal of Forest Research (37) 11-22
Although the majority of fires in the western United States historically occurred during the late summer or early fall when fuels were dry and plants were dormant or nearly so, early-season prescribed burns are often ignited when fuels are still moist and plants are actively growing. The purpose of this...
Use of streamflow data to estimate base flowground-water recharge for Wisconsin
W.A. Gebert, M.J. Radloff, E.J. Considine, J.L. Kennedy
2007, Journal of the American Water Resources Association (43) 220-236
The average annual base flow/recharge was determined for streamflow-gaging stations throughout Wisconsin by base-flow separation. A map of the State was prepared that shows the average annual base flow for the period 1970-99 for watersheds at 118 gaging stations. Trend analysis was performed on 22 of the 118 streamflow-gaging stations...
Chinook salmon use of spawning patches: Relative roles of habitat quality, size, and connectivity
D.J. Isaak, R.F. Thurow, B.E. Rieman, J. B. Dunham
2007, Ecological Applications (17) 352-364
Declines in many native fish populations have led to reassessments of management goals and shifted priorities from consumptive uses to species preservation. As management has shifted, relevant environmental characteristics have evolved from traditional metrics that described local habitat quality to characterizations of habitat size and connectivity. Despite the implications this...
Sinter-vein correlations at Buckskin Mountain, National district, Humboldt County, Nevada
P.G. Vikre
2007, Economic Geology (102) 193-224
At Buckskin Mountain (elev 2,650 m, 8,743 ft), Humboldt County, Nevada, a hydrothermal system, imposed on a middle Miocene volcanic sequence with contrasting permeabilities and tensile strengths, produced alteration assemblages controlled by elevation, from Hg-mineralized sinter to subjacent precious metal veins over a vertical distance exceeding 790 m. Sinter and...
Conversations on the habitability of worlds: The importance of volatiles
J.-L. Bertaux, M. Carr, D.J. Des Marais, E. Gaidos
2007, Space Science Reviews (129) 123-165
Our scientific forefathers discuss the interrelationships between water, climate, the atmosphere, and life on Earth and other terrestrial planets at a workshop in Nichtcha??tel, Switzerland. ?? 2007 Springer Science+Business Media B.V....
Occurrence of the amphibian pathogen Batrachochytrium dendrobatidis in the Pacific Northwest
C.A. Pearl, E. L. Bull, D. E. Green, J. Bowerman, M.J. Adams, A. Hyatt, W.H. Wente
2007, Journal of Herpetology (41) 145-149
Chytridiomycosis (infection by the fungus Batrachochytrium dendrobatidis) has been associated with amphibian declines in at least four continents. We report results of disease screens from 210 pond-breeding amphibians from 37 field sites in Oregon and Washington. We detected B. dendrobatidis on 28% of sampled amphibians, and we found ??? 1...
Lateral spread hazard mapping of the northern Salt Lake Valley, Utah, for a M7.0 scenario earthquake
M.J. Olsen, S.F. Bartlett, B.J. Solomon
2007, Earthquake Spectra (23) 95-113
This paper describes the methodology used to develop a lateral spread-displacement hazard map for northern Salt Lake Valley, Utah, using a scenario M7.0 earthquake occurring on the Salt Lake City segment of the Wasatch fault. The mapping effort is supported by a substantial amount of geotechnical, geologic, and topographic data...
The viability of a nonenzymatic reductive citric acid cycle - Kinetics and thermochemistry
D.S. Ross
2007, Origins of Life and Evolution of the Biosphere (37) 61-65
The likelihood of a functioning nonenzymatic reductive citric acid cycle, recently proposed as the precursor to biosynthesis on early Earth, is examined on the basis of the kinetics and thermochemistry of the acetate → pyruvate → oxaloacetate → malate sequence. Using data derived from studies of...
The effect of Appalachian mountaintop mining on interior forest
James D. Wickham, K.H. Riitters, T.G. Wade, Michael Coan, Collin G. Homer
2007, Landscape Ecology (22) 179-187
Southern Appalachian forests are predominantly interior because they are spatially extensive with little disturbance imposed by other uses of the land. Appalachian mountaintop mining increased substantially during the 1990s, posing a threat to the interior character of the forest. We used spatial convolution to identify interior forest at multiple scales...
Historical trends in creel limits, length-based limits, and season restrictions for black basses in the United States and Canada
C. Paukert, M. McInerny, Ronald Schultz
2007, Fisheries (32) 62-72
We determined for largemouth bass (Micropterus salmoides), smallmouth bass (M. dolomeui), and spotted bass (M. punctulatus) historical trends in state- and province-wide creel limits, length limits, and season closures along with the rationale justifying these regulations. Based on data gathered via mail surveys and the Internet, 55 jurisdictions had state-...
