Geographic variation, genetic structure, and conservation unit designation in the Larch Mountain salamander (Plethodon larselli)
R. Steven Wagner, Mark P. Miller, Charles Crisafulli, Susan M. Haig
2005, Canadian Journal of Zoology (83) 396-406
The Larch Mountain salamander (Plethodon larselli Burns, 1954) is an endemic species in the Pacific northwestern United States facing threats related to habitat destruction. To facilitate development of conservation strategies, we used DNA sequences and RAPDs (random amplified polymorphic DNA) to examine differences among populations of this species. Phylogenetic analyses of...
Discoloration of polyvinyl chloride (PVC) tape as a proxy for water-table depth in peatlands: validation and assessment of seasonal variability
Robert K. Booth, Sara C. Hotchkiss, Douglas A. Wilcox
2005, Functional Ecology (19) 1040-1047
Summary: 1. Discoloration of polyvinyl chloride (PVC) tape has been used in peatland ecological and hydrological studies as an inexpensive way to monitor changes in water-table depth and reducing conditions. 2. We investigated the relationship between depth of PVC tape discoloration and measured water-table depth at monthly time steps during...
Tsunami history of an Oregon coastal lake reveals a 4600 yr record of great earthquakes on the Cascadia subduction zone
H.M. Kelsey, A.R. Nelson, E. Hemphill-Haley, Robert C. Witter
2005, Geological Society of America Bulletin (117) 1009-1032
Bradley Lake, on the southern Oregon coastal plain, records local tsunamis and seismic shaking on the Cascadia subduction zone over the last 7000 yr. Thirteen marine incursions delivered landward-thinning sheets of sand to the lake from nearshore, beach, and dune environments to the west. Following each incursion, a slug of...
Estimating hydrodynamic roughness in a wave-dominated environment with a high-resolution acoustic Doppler profiler
J.R. Lacy, C. R. Sherwood, D.J. Wilson, T.A. Chisholm, G.R. Gelfenbaum
2005, Journal of Geophysical Research C: Oceans (110) 1-15
Hydrodynamic roughness is a critical parameter for characterizing bottom drag in boundary layers, and it varies both spatially and temporally due to variation in grain size, bedforms, and saltating sediment. In this paper we investigate temporal variability in hydrodynamic roughness using velocity profiles in the bottom boundary layer measured with...
Teleseismic body waves from dynamically rupturing shallow thrust faults: Are they opaque for surface-reflected phases?
D.E. Smith, Brad T. Aagaard, T. H. Heaton
2005, Bulletin of the Seismological Society of America (95) 800-817
We investigate whether a shallow-dipping thrust fault is prone to waveslip interactions via surface-reflected waves affecting the dynamic slip. If so, can these interactions create faults that are opaque to radiated energy? Furthermore, in this case of a shallow-dipping thrust fault, can incorrectly assuming a transparent fault while using dislocation...
Thiamine status of Cayuga Lake rainbow trout and its influence on spawning migration
H. George Ketola, Thomas L. Chiotti, Robert S. Rathman, John D. Fitzsimons, Dale C. Honeyfield, Peter J. Van Dusen, Graham E. Lewis
2005, North American Journal of Fisheries Management (25) 1281-1287
Rainbow trout Oncorhynchus mykiss in Cayuga Lake, New York, appear to be suffering from a thiamine deficiency because their progeny develop general weakness, loss of equilibrium, and increased mortality, which are prevented by treatment with thiamine. Thiamine status and its effect on adults are unknown. In 2000 and 2002, we...
Mercury concentrations in water from an unconfined aquifer system, New Jersey coastal plain
J. L. Barringer, Zoltan Szabo, L. J. Kauffman, T. H. Barringer, P. E. Stackelberg, T. Ivahnenko, S. Rajagopalan, D. P. Krabbenhoft
2005, Science of the Total Environment (346) 169-183
Concentrations of total mercury (Hg) from 2 μg/L (the USEPA maximum contaminant level) to 72 μg/L in water from about 600 domestic wells in residential parts of eight counties in southern New Jersey have been reported by State and county agencies. The wells draw water from the areally extensive (7770...
Effects of rainfall seasonality and soil moisture capacity on mean annual water balance for Australian catchments
N.J. Potter, L. Zhang, P. C. D. Milly, T.A. McMahon, A.J. Jakeman
2005, Water Resources Research (41)
An important factor controlling catchment‐scale water balance is the seasonal variation of climate. The aim of this study is to investigate the effect of the seasonal distributions of water and energy, and their interactions with the soil moisture store, on mean annual water balance in Australia at catchment scales using...
Ca cycling and isotopic fluxes in forested ecosystems in Hawaii
B.A. Wiegand, O.A. Chadwick, P.M. Vitousek, J. L. Wooden
2005, Geophysical Research Letters (32) 1-4
Biogeochemical processes fractionate Ca isotopes in plants and soils along a 4 million year developmental sequence in the Hawaiian Islands. We observed that plants preferentially take up 40Ca relative to 44Ca, and that biological fractionation and changes in the relative contributions from volcanic and marine sources produce a significant increase...
An updated global earthquake catalogue for stable continental regions: Reassessing the correlation with ancient rifts
S.M. Schulte, Walter D. Mooney
2005, Geophysical Journal International (161) 707-721
We present an updated global earthquake catalogue for stable continental regions (SCRs; i.e. intraplate earthquakes) that is available on the Internet. Our database contains information on location, magnitude, seismic moment and focal mechanisms for over 1300 M (moment magnitude) ≥ 4.5 historic and instrumentally recorded crustal events. Using this updated earthquake database...
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...
Quarantine of Aeromonas salmonicida-harboring ebonyshell mussels (Fusconaia ebena) prevents transmission of the pathogen to brook trout (Salvelinus fontinalis)
Clifford E. Starliper
2005, Journal of Shellfish Research (24) 573-578
Furunculosis, caused by the bacterium Aeromonas salmonicida, was artificially induced in brook trout (Salvelinus fontinalis) in an experimental tank. Ebonyshells (Fusconaia ebena) were placed to cohabit with these fish to acquire the pathogen through siphoning. After 2 wk of cohabitation, 10 of the mussels were assayed by bacterial...
Indoor radon risk potential of Hawaii
G.M. Reimer, S.L. Szarzi
2005, Journal of Radioanalytical and Nuclear Chemistry (264) 365-369
A comprehensive evaluation of radon risk potential in the State of Hawaii indicates that the potential for Hawaii is low. Using a combination of factors including geology, soils, source-rock type, soil-gas radon concentrations, and indoor measurements throughout the state, a general model was developed that permits prediction for various regions...
Terlinguacreekite, Hg2+3O2 Cl2, a new mineral species from the Perry pit, Mariposa mine, Terlingua mining district, Brewster County, Texas, U.S.A
Andrew C. Roberts, Robert A. Gault, W.H. Paar, M. A. Cooper, Frank C. Hawthorne, P. C. Burns, S. Cisneros, E.E. Foord
2005, Canadian Mineralogist (43) 1055-1060
Terlinguacreekite, ideally Hg2+ 3O2Cl2, has a very pronounced subcell that is orthorhombic, space-group choices Imam, Imcm, Ima2 and I2cm, with unit-cell parameters refined from powder data: a 6.737(3), b 25.528(10), c 5.533(2) Å, V 951.6(6) Å3, a:b:c 0.2639:1:0.2167, Z = 8. The true symmetry, supercell unit-cell parameters, and details regarding the crystal structure are unknown. The strongest nine lines of the X-ray powder-diffraction pattern [d in Å (I)(subcell hkl)]...
The Circumpolar Arctic vegetation map
Donald A. Walker, Martha K. Raynolds, F.J.A. Daniels, E. Einarsson, A. Elvebakk, W.A. Gould, A.E. Katenin, S.S. Kholod, C. J. Markon, E. S. Melnikov, N.G. Moskalenko, Stephen S. Talbot, B.A. Yurtsev, L.C. Bliss, S.A. Edlund, S.C. Zoltai, M. Wilhelm, C. Bay, G. Gudjonsson, G.V. Ananjeva, D.S. Drozdov, L.A. Konchenko, Y.V. Korostelev, O.E. Ponomareva, N.V. Matveyeva, I.N. Safranova, R. Shelkunova, A.N. Polezhaev, B.E. Johansen, H.A. Maier, D.F. Murray, Michael D. Fleming, N.G. Trahan, T.M. Charron, S.M. Lauritzen, B.A. Vairin
2005, Journal of Vegetation Science (16) 267-282
Question: What are the major vegetation units in the Arctic, what is their composition, and how are they distributed among major bioclimate subzones and countries? Location: The Arctic tundra region, north of the tree line. Methods: A photo-interpretive approach was used to delineate the vegetation onto an Advanced Very High...
Selenium impacts on razorback sucker, Colorado: Colorado River: III. Larvae
Steven J. Hamilton, Kathy M. Holley, Kevin J. Buhl, Fern A. Bullard
2005, Ecotoxicology and Environmental Safety (61) 168-189
Razorback sucker (Xyrauchen texanus) larvae from adults exposed to selenium at three sites near Grand Junction, Colorado, for 9 months were used in a 30-day waterborne and dietary selenium study. Selenium concentrations in water averaged <1.6 μg/L from 24-Road, 0.9 μg/L from Horsethief, 5.5 μg/L from Adobe Creek, and 10.7 μg/L from the North...
Snow-fed streamflow timing at different basin scales: Case study of the Tuolumne River above Hetch Hetchy, Yosemite, California
J.D. Lundquist, M. D. Dettinger, D.R. Cayan
2005, Water Resources Research (41) 1-14
Diurnal cycles in snow‐fed streams provide a useful technique for measuring the time it takes water to travel from the top of the snowpack, where snowmelt typically peaks in the afternoon, to the river gauge, where the daily maximum flows may arrive many hours later. Hourly stage measurements in nested...
Application of wavelet analysis for monitoring the hydrologic effects of dam operation: Glen canyon dam and the Colorado River at lees ferry, Arizona
M.A. White, J. C. Schmidt, D.J. Topping
2005, River Research and Applications (21) 551-565
Wavelet analysis is a powerful tool with which to analyse the hydrologic effects of dam construction and operation on river systems. Using continuous records of instantaneous discharge from the Lees Ferry gauging station and records of daily mean discharge from upstream tributaries, we conducted wavelet analyses of the hydrologic structure...
Temporal analysis of the frequency and duration of low and high streamflow: Years of record needed to characterize streamflow variability
S. Huh, D.A. Dickey, M. R. Meador, K.E. Ruhl
2005, Journal of Hydrology (310) 78-94
A temporal analysis of the number and duration of exceedences of high- and low-flow thresholds was conducted to determine the number of years required to detect a level shift using data from Virginia, North Carolina, and South Carolina. Two methods were used - ordinary least squares assuming a known error...
Isotopic composition of Antarctic Dry Valley nitrate: Implications for NOy sources and cycling in Antarctica
G. Michalski, James G. Bockheim, C. Kendall, M. Thiemens
2005, Geophysical Research Letters (32) 1-4
Nitrates minerals from the Dry Valleys of Antarctica have been analyzed for their oxygen and nitrogen isotopic compositions. The 15N was depleted with δ15N values ranging from −9.5 to −26.2‰, whereas the 17O and 18O isotopes were highly enriched (with excess 17O) with δ18O values spanning 62–76‰ and Δ17O values...
Electroshocking and PIT tagging of juvenile Atlantic salmon: Are there interactive effects on growth and survival?
Douglas B. Sigourney, G.E. Horton, T.L. Dubreuil, A.M. Varaday, B. H. Letcher
2005, North American Journal of Fisheries Management (25) 1016-1021
Electroshocking and tagging of fish with passive integrated transponder (PIT) tags are two commonly used methods for conducting mark-recapture studies in freshwater environments and are frequently used in combination. We conducted an experiment to test for the effects of electroshocking, tagging, and a combination of electroshocking plus tagging on the...
Interaction of rearing environment and reproductive tactic on gene expression profiles in Atlantic salmon
N. Aubin-Horth, B. H. Letcher, H.A. Hofmann
2005, Conference Paper, Journal of Heredity
Organisms that share the same genotype can develop into divergent phenotypes, depending on environmental conditions. In Atlantic salmon, young males of the same age can be found either as sneakers or immature males that are future anadromous fish. Just as the organism-level phenotype varies between divergent male developmental trajectories, brain...
Enhancing the value of the Breeding Bird Survey: Repy to Sauer et al (2005)
Charles M. Francis, Jonathan Bart, Erica H. Dunn, Kenneth P. Burnham, C. John Ralph
2005, Journal of Wildlife Management (69) 1327-1332
Bart et al (2004a) proposed several approaches for enhancing the considerable value of the Breeding Bird Survey (BBS). Sauer et al. (2005) critiqued some of these approaches, and emphasized alternative goals for the survey. We agree with many of the...
The role of abiotic conditions in shaping the long-term patterns of a high-elevation Argentine ant invasion
P.D. Krushelnycky, S.M. Joe, A.C. Medeiros, C.C. Daehler, L.L. Loope
2005, Diversity and Distributions (11) 319-331
Analysis of long-term patterns of invasion can reveal the importance of abiotic factors in influencing invasion dynamics, and can help predict future patterns of spread. In the case of the invasive Argentine ant (Linepithema humile), most prior studies have investigated this species' limitations in hot and dry climates. However, spatial...
Spatial and seasonal dynamics of brook trout populations inhabiting a central Appalachian watershed
J.T. Petty, P. J. Lamothe, P. M. Mazik
2005, Transactions of the American Fisheries Society (134) 572-587
We quantified the watershed-scale spatial population dynamics of brook trout Salvelinus fontinalis in the Second Fork, a third-order tributary of Shavers Fork in eastern West Virginia. We used visual surveys, electrofishing, and mark-recapture techniques to quantify brook trout spawning intensity, population density, size structure, and demographic rates (apparent survival and...
