Lateral line pore diameters correlate with the development of gas bubble trauma signs in several Columbia River fishes
R.G. Morris, J.W. Beeman, S. P. VanderKooi, A.G. Maule
2003, Comparative Biochemistry and Physiology, Part A: Molecular & Integrative Physiology (135) 309-320
Gas bubble trauma (GBT) caused by gas supersaturation of river water continues to be a problem in the Columbia River Basin. A common indicator of GBT is the percent of the lateral line occluded with gas bubbles; however, this effect has never been examined in relation to lateral line morphology....
The mechanics of unrest at Long Valley caldera, California. 2. Constraining the nature of the source using geodetic and micro-gravity data
Maurizio Battaglia, P. Segall, C. Roberts
2003, Journal of Volcanology and Geothermal Research (127) 219-245
We model the source of inflation of Long Valley caldera by combining geodetic and micro-gravity data. Uplift from GPS and leveling, two-color EDM measurements, and residual gravity change determinations are used to estimate the intrusion geometry, assuming a vertical prolate ellipsoidal source. The U.S. Geological Survey occupied the Long Valley...
Estimation of past seepage volumes from calcite distribution in the Topopah Spring Tuff, Yucca Mountain, Nevada
B.D. Marshall, L.A. Neymark, Z. E. Peterman
2003, Journal of Contaminant Hydrology (62-63) 237-247
Low-temperature calcite and opal record the past seepage of water into open fractures and lithophysal cavities in the unsaturated zone at Yucca Mountain, Nevada, site of a proposed high-level radioactive waste repository. Systematic measurements of calcite and opal coatings in the Exploratory Studies Facility (ESF) tunnel at the proposed repository...
Using tree recruitment patterns and fire history to guide restoration of an unlogged ponderosa pine/Douglas‐fir landscape in the southern Rocky Mountains after a century of fire suppression
M. R. Kaufmann, L. S. Huckaby, P.J. Fornwalt, J. M. Stoker, W.H. Romme
2003, Forestry (76) 231-241
Tree age and fire history were studied in an unlogged ponderosa pine/Douglas‐fir ( Pinus ponderosa/Pseudotsuga menziesii ) landscape in the Colorado Front Range mountains. These data were analysed to understand tree survival during fire and post‐fire recruitment patterns after fire, as a basis for understanding the characteristics of, and restoration...
Detection of avian malaria (Plasmodium spp.) in native land birds of American Samoa
S.I. Jarvi, M.E.M. Farias, H. Baker, H.B. Freifeld, P.E. Baker, E. Van Gelder, J.G. Massey, C. T. Atkinson
2003, Conservation Genetics (4) 629-637
This study documents the presence of Plasmodium spp. in landbirds of central Polynesia. Blood samples collected from eight native and introduced species from the island of Tutuila, American Samoa were evaluated for the presence of Plasmodium spp. by nested rDNA PCR, serology and/or microscopy. A total of 111/188 birds (59%)...
Red-shouldered Hawk (Buteo lineatus) abundance and habitat in a reclaimed mine landscape
M.J. Balcerzak, P.B. Wood
2003, Journal of Raptor Research (37) 188-197
Fragmentation of the landscape by large-scale mining may affect Red-shouldered Hawk (Buteo lineatus) populations by reducing the amount of forested habitat available in a landscape and by creating fragmented forest parches surrounded by reclaimed mine lands. We examined habitat characteristics and relative abundance of Red-shouldered Hawks in reclaimed mine landscapes...
Seismic evidence for widespread serpentinized forearc upper mantle along the Cascadia margin
T.M. Brocher, T. Parsons, A.M. Trehu, C.M. Snelson, M. A. Fisher
2003, Geology (31) 267-270
Petrologic models suggest that dehydration and metamorphism of subducting slabs release water that serpentinizes the overlying forearc mantle. To test these models, we use the results of controlled-source seismic surveys and earthquake tomography to map the upper mantle along the Cascadia margin forearc. We find anomalously low upper-mantle velocities and/or...
Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors
Gary P. Curtis
2003, Computers & Geosciences (29) 319-329
Reactive solute transport models are useful tools for analyzing complex geochemical behavior resulting from biodegradation of organic compounds by multiple terminal electron acceptors (TEAPs). The usual approach of simulating the reactions of multiple TEAPs by an irreversible Monod rate law was compared with simulations that assumed a partial local equilibrium...
Patterns of apparent extirpation among isolated populations of pikas (Ochotona princeps) in the Great Basin
Erik A. Beever, P. F. Brussard, Joel Berger
2003, Journal of Mammalogy (84) 37-54
We conducted exploratory analyses to examine the relative roles played by natural and anthropogenic influences on persistence of a montane mammal. We revisited historical locations of pikas (Ochotona princeps) within the hydrographic Great Basin during summers of 1994-1999. Seven of 25 populations (28%) reported earlier in the 20th century appeared...
Remediation of acid mine drainage at the friendship hill national historic site with a pulsed limestone bed process
P.L. Sibrell, B. Watten, T. Boone
Young C.Alfantazi A.Anderson C.James A., editor(s)
2003, Conference Paper, Proceedings of the TMS Fall Extraction and Processing Conference
A new process utilizing pulsed fluidized limestone beds was tested for the remediation of acid mine drainage at the Friendship Hill National Historic Site, in southwestern Pennsylvania. A 230 liter-per-minute treatment system was constructed and operated over a fourteen-month period from June 2000 through September 2001. Over this period of...
Potential effects on grassland birds of converting marginal cropland to switchgrass biomass production
L.D. Murray, Louis B. Best, T.J. Jacobsen, M.L. Braster
2003, Biomass and Bioenergy (25) 167-175
Habitat loss is a major reason for the decline of grassland birds in North America. Five habitats (pastures, hayfields, rowcrop fields, small-grain fields, Conservation Reserve Program fields) compose most of the habitat used by grassland birds in the Midwest United States. Growing and harvesting switchgrass (Panicum virgatum) as a biomass...
Mineral resources of Peru's ancient societies
W. E. Brooks
2003, Geotimes (48) 32-33
Northern Peru has an exceptionally rich archaeological heritage that includes metalwork, ceramics and textiles. The success of at least a half-dozen pre-Columbian societies dating back 3,000 years and subsequent Spanish colonization in the 1400s has rested on the effective use of northern Peru's abundant resources. In the summer of 2000,...
Temperature dependence of polyhedral cage volumes in clathrate hydrates
B.C. Chakoumakos, C.J. Rawn, A.J. Rondinone, L.A. Stern, S. Circone, S. H. Kirby, Y. Ishii, C.Y. Jones, B.H. Toby
2003, Canadian Journal of Physics (81) 183-189
The polyhedral cage volumes of structure I (sI) (carbon dioxide, methane, trimethylene oxide) and structure II (sII) (methane-ethane, propane, tetrahydrofuran, trimethylene oxide) hydrates are computed from atomic positions determined from neutron powder-diffraction data. The ideal structural formulas for sI and sII are, respectively, S2L6 ?? 46H2O and S16L???8 ?? 136H2O,...
Temperature-pressure conditions in coalbed methane reservoirs of the Black Warrior basin: Implications for carbon sequestration and enhanced coalbed methane recovery
J.C. Pashin, M.R. McIntyre
2003, International Journal of Coal Geology (54) 167-183
Sorption of gas onto coal is sensitive to pressure and temperature, and carbon dioxide can be a potentially volatile supercritical fluid in coalbed methane reservoirs. More than 5000 wells have been drilled in the coalbed methane fields of the Black Warrior basin in west-central Alabama, and the hydrologic and geothermic...
Structural localization and origin of compartmentalized fluid flow, Comstock lode, Virginia City, Nevada
B. R. Berger, J.V. Tingley, L.J. Drew
2003, Economic Geology (98) 387-408
Bonanza-grade orebodies in epithermal-style mineral deposits characteristically occur as discrete zones within spatially more extensive fault and/or fracture systems. Empirically, the segregation of such systems into compartments of higher and lower permeability appears to be a key process necessary for high-grade ore formation and, most commonly, it is such concentrations...
Rejuvenated-stage volcanism after 0.6-m.y. quiescence at West Maui Volcano, Hawaii: New evidence from K-Ar ages and chemistry of Lahaina Volcanics
Takahiro Tagami, Yoshitomo Nishimitsu, D. R. Sherrod
2003, Journal of Volcanology and Geothermal Research (120) 207-214
West Maui's rejuvenated-stage Lahaina Volcanics were erupted from four discrete sites. New KAr ages indicate two pulses of volcanism, the older about 0.6 Ma and the younger about 0.4 Ma. Compositionally the lava flows are entirely basanitic, but each pulse is diverse. The underlying postshield-stage Honolua Volcanics were emplaced by...
Measurement of in vitro leucocyte mitogenesis in fish: ELISA based detection of the thymidine analogue 5'-bromo-2'-deoxyuridine
David T. Gauthier, Deborah D. Cartwright, Christine L. Densmore, Vicki Blazer, Christopher A. Ottinger
2003, Fish and Shellfish Immunology (14) 279-288
In this study we present a method for the measurement of in vitro mitogenesis in fish leucocytes that is based on the incorporation of the thymidine analogue 5′-bromo-2′-deoxyuridine (BrdU) into the DNA of replicating cells, followed by ELISA-based detection. This technique, adapted from methods developed for mammalian cells, operates on a similar...
Gyrfalcon feeding behavior during the nestling period in central west Greenland
Travis Booms, Mark R. Fuller
2003, Arctic (56) 341-348
We studied gyrfalcon (Falco rusticolus) food delivery and feeding behavior during the nestling period in central West Greenland during the 2000 and 2001 field seasons. We used time-lapse video cameras installed at three nests to record 2677.25 hours of nestling video. Ptarmigan delivered to nests were usually plucked prior to...
Application of geographic information systems and remote sensing for quantifying patterns of erosion and water quality
J.C. Ritchie, D.E. Walling, J. Peters
2003, Hydrological Processes (17) 885-886
[No abstract available]...
Photographic techniques for characterizing streambed particle sizes
Matthew S. Whitman, Edward H. Moran, Robert T. Ourso
2003, Transactions of the American Fisheries Society (132) 605-610
We developed photographic techniques to characterize coarse (>2-mm) and fine (≤2-mm) streambed particle sizes in 12 streams in Anchorage, Alaska. Results were compared with current sampling techniques to assess which provided greater sampling efficiency and accuracy. The streams sampled were wadeable and contained gravel—cobble streambeds. Gradients ranged from about 5%...
Factors affecting food chain transfer of mercury in the vicinity of the Nyanza site, Sudbury River, Massachusetts
T.A. Haines, T.W. May, R.T. Finlayson, S.E. Mierzykowski
2003, Environmental Monitoring and Assessment (86) 211-232
The influence of the Nyanza Chemical Waste Dump Superfund Site on the Sudbury River, Massachusetts, was assessed by analysis of sediment, fish prey organisms, and predator fish from four locations in the river system. Whitehall Reservoir is an impoundment upstream of the site, and Reservoir #2 is an impoundment downstream...
Signatures of the seismic source in EMD-based characterization of the 1994 Northridge, California, earthquake recordings
R.R. Zhang, S. Ma, S. Hartzell
2003, Bulletin of the Seismological Society of America (93) 501-518
In this article we use empirical mode decomposition (EMD) to characterize the 1994 Northridge, California, earthquake records and investigate the signatures carried over from the source rupture process. Comparison of the current study results with existing source inverse solutions that use traditional data processing suggests that the EMD-based characterization contains...
Home range and movements of boreal toads in undisturbed habitat
E. Muths
2003, Copeia 160-165
I sampled movements and amount of area used by boreal toads (Bufo boreas) between June and October for 3 yr. Females were found farther from the breeding site than were males, and mean home ranges, as calculated by the adaptive kernel method, were four times larger for females than for males. Temperature and snow accumulation were comparable...
Myxosporean plasmodial infection associated with ulcerative lesions in young-of-the-year Atlantic menhaden in a tributary of the Chesapeake Bay, and possible links to Kudoa clupeidae
R. Reimschuessel, C.M. Gieseker, C. Driscoll, A. Baya, A.S. Kane, V. S. Blazer, J.J. Evans, M.L. Kent, J.D.W. Moran, S.L. Poynton
2003, Diseases of Aquatic Organisms (53) 143-166
Ulcers in Atlantic menhaden Brevoortia tyrannus (Latrobe) (Clupeidae), observed along the USA east coast, have been attributed to diverse etiologies including bacterial, fungal and, recently, harmful algal blooms. To understand the early pathogenesis of these lesions, we examined juvenile Atlantic menhaden collected during their seasonal presence in Chesapeake Bay tributaries...
Biostratigraphy and structure of paleozoic host rocks and their relationship to Carlin-type gold deposits in the Jerritt Canyon mining district, Nevada
S. G. Peters, A. K. Armstrong, A. G. Harris, R.L. Oscarson, P.J. Noble
2003, Economic Geology (98) 317-337
The Jerritt Canyon mining district in the northern Independence Range, northern Nevada, contains multiple, nearly horizontal, thrust masses of platform carbonate rocks that are exposed in a series of north- to northeast-elongated, tectonic windows through rocks of the Roberts Mountains allochthon. The Roberts Mountains allochthon was emplaced during the Late...
