Linking hyporheic flow and nitrogen cycling near the Willamette River: A large river in Oregon, USA
S.R. Hinkle, J.H. Duff, F.J. Triska, A. Laenen, E.B. Gates, K.E. Bencala, D.A. Wentz, S. R. Silva
2001, Journal of Hydrology (244) 157-180
Several approaches were used to characterize ground water/surface water interactions near the Willamette River - A large (ninth order) river in Oregon, USA. A series of potentiometric surface maps demonstrated the presence of highly dynamic hydraulic gradients between rivers and the adjacent aquifer. Hyporheic zone gradients extended on the order...
An apparatus for preparing benthic samples aboard ship
Phillip N. Pepper, Thomas L. Girard, Martin A. Stapanian
2001, North American Journal of Fisheries Management (21) 249-252
We describe a safe and effective apparatus for washing and reducing the volume of benthic samples collected by grab samplers aboard ship. The sample is transferred directly from the dredge to the apparatus and then washed with water pumped through pipes in the apparatus and from...
Establishment of two invasive crustaceans (Copepoda: Harpacticoida) on the nearshore sands of Lake Michigan
Thomas G. Horvath, Richard L. Whitman, Laurel L. Last
2001, Canadian Journal of Fisheries and Aquatic Sciences (58) 1261-1264
Benthic copepods (Copepoda: Harpacticoida) in the nearshore sediments of southern Lake Michigan appear to be dominated by two new invasive species. We report the first occurrence in North America of Schizopera borutzkyi Montschenko, a native to the Danube River delta, and Heteropsyllus nr. nunni, likely a new species that...
Accumulation of 2,3,7,8-tetrachlorodibenzo-p-dioxin by rainbow trout (Onchorhynchus mykiss) at environmentally relevant dietary concentrations
Paul D. Jones, Kurunthachalam Kannan, John L. Newsted, Donald E. Tillitt, Lisa L. Williams, John P. Giesy
2001, Environmental Toxicology and Chemistry (20) 344-350
Rainbow trout were fed a diet containing 1.8, 18, or 90 pg/g 3H-2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) for up to 320 d. Concentrations of TCDD were determined in muscle, liver, and ovaries at 100, 150, 200, and 250 d. Concentrations of TCDD reached an apparent steady-state concentration in liver after 100 d of...
Occurrence of cyanazine compounds in groundwater: Degradates more prevalent than the parent compound
D.W. Kolpin, E.M. Thurman, S. M. Linhart
2001, Environmental Science & Technology (35) 1217-1222
A recently developed analytical method using liquid chromatography/mass spectrometry was used to investigate the occurrence of cyanazine and its degradates cyanazine acid (CAC), cyanazine amide (CAM), deethylcyanazine (DEC), and deethylcyanazine acid (DCAC) in groundwater. This research represents some of the earliest data on the occurrence of cyanazine degradates in groundwater....
The influence of biological soil crusts on mineral uptake by associated vascular plants
K.T. Harper, Jayne Belnap
2001, Journal of Arid Environments (47) 347-357
Soil surfaces dominated by cyanobacteria and cyanolichens (such as Collema sp.) are widespread in deserts of the world. The influence of these biological soil crusts on the uptake of bioessential elements is reported for the first time for six seed plants of the deserts of Utah. This sample almost doubles the number...
Assessment of reproductive effects in largemouth bass (Micropterus salmoides) exposed to bleached/unbleached kraft mill effluents
M. S. Sepulveda, D. S. Ruessler, N. D. Denslow, S. E. Holm, T. R. Schoeb, T. S. Gross
2001, Archives of Environmental Contamination and Toxicology (41) 475-482
This study evaluated the potential effects of different concentrations of bleached/unbleached kraft mill effluent (B/UKME) on several reproductive endpoints in adult largemouth bass (Micropterus salmoides). The kraft mill studied produces a 50/50 mix of bleached/unbleached market pulp with an estimated release of 36 million gal of efffluent/day. Bleaching sequences were...
Minimum age of the Neoproterozoic Seven Hundred Acre Island Formation and the tectonic setting of the Islesboro Formation, Islesboro block, Maine
David B. Stewart, Robert D Tucker, Robert Ayuso, Daniel R. Lux
2001, Atlantic Geology (37) 41-59
Two plat formal stratigraphic sequences occur on Islesboro, Penobscot Bay, Maine. The older Seven Hundred Acre Island Formation is at least 200 m thick, its base is not exposed, and it makes up fault-bounded blocks of siliceous colour-banded dolomitic marble, muscovite-rich quartzite, coarse-grained splendent muscovite-garnet-staurolite-andalusite schist, and calcareous metapelite, with...
The occurrence and distribution of selected trace elements in the upper Rio Grande and tributaries in Colorado and Northern New Mexico
Howard E. Taylor, Ronald C. Antweiler, D.A. Roth, T.I. Brinton, D.B. Peart, D. F. Healy
2001, Archives of Environmental Contamination and Toxicology (41) 410-426
Two sampling trips were undertaken in 1994 to determine the distribution of trace elements in the Upper Rio Grande and several of its tributaries. Water discharges decreased in the main stem of the Rio Grande from June to September, whereas dissolved concentrations of trace elements generally increased. This is attributed...
Atmospheric regime of dust and salt through 75,000 years of Taylor Dome ice core: Refinement by measurement of major, minor, and trace metal suites
T. K. Hinkley, A. Matsumoto
2001, Journal of Geophysical Research D: Atmospheres (106) 18487-18493
Measurement of absolute and relative amounts of dust and salt deposited in the polar ice record is central to several fields of study, including nutrient delivery, atmospheric deposition of trace elements, past wind strengths, dust provenance, and other aspects of climate and geochemical history. We present a method intended to...
Viagra falls: Pharmaceuticals in rivers and municipal tap water
B. Masters
2001, Water Well Journal (55) 16-18
[No abstract available]...
Predictions of hydrothermal alteration within near-ridge oceanic crust from coordinated geochemical and fluid flow models
L.R. Wetzel, Jeff P. Raffensperger, E.L. Shock
2001, Journal of Volcanology and Geothermal Research (110) 319-342
Coordinated geochemical and hydrological calculations guide our understanding of the composition, fluid flow patterns, and thermal structure of near-ridge oceanic crust. The case study presented here illustrates geochemical and thermal changes taking place as oceanic crust ages from 0.2 to 1.0 Myr. Using a finite element code, we model fluid...
The behaviour of 39 pesticides in surface waters as a function of scale
P. D. Capel, S.J. Larson, T. A. Winterstein
2001, Hydrological Processes (15) 1251-1269
A portion of applied pesticides runs off agricultural fields and is transported through surface waters. In this study, the behaviour of 39 pesticides is examined as a function of scale across 14 orders of magnitude from the field to the ocean. Data on pesticide loads in streams from two US...
Quaternary geology, Cold Bay and False Pass quadrangles, Alaska Peninsula
Frederic H. Wilson, Florence R. Weber
2001, Report, Geologic studies in Alaska by the U.S. Geological Survey, 1999
Recent mapping and interpretation of Quaternary geologic features has improved our understanding of the interaction between volcanic, glacial, and tectonic activity in the Cold Bay and False Pass 1:250,000-scale quadrangles on the Alaska Peninsula. The glacial and volcanic record of the map area strongly suggests that continental-shelf glaciations and two...
Identification of larval Pacific lampreys (Lampetra tridentata), river lampreys (L. ayresi), and western brook lampreys (L. richardsoni) and thermal requirements of early life history stages of lampreys
J.M. Bayer, M.H. Meeuwig, J.G. Seelye
2001, Report
Abstract not available...
Influence of reservoirs on solute transport: A regional-scale approach
V.J. Kelly
2001, Hydrological Processes (15) 1227-1249
Regional transport of water and dissolved constituents through heavily regulated river systems is influenced by the presence of reservoirs. Analysis of seasonal patterns in solute fluxes for salinity and nutrients indicates that in-reservoir processes within large storage reservoirs in the Rio Grande and Colorado basins (southwestern USA) are superimposed over...
Olfactory sensitivity of Pacific lampreys to petromyzonol sulfate. Annual report 2000
J.M. Bayer, J.G. Seelye
2001, Report
Abstract not available ...
Trace metal concentrations in shallow ground water
L.M. Zelewski, D. P. Krabbenhoft, D.E. Armstrong
2001, Ground Water (39) 485-491
Trace metal clean sampling and analysis techniques were used to examine the temporal patterns of Hg, Cu, and Zn concentrations in shallow ground water, and the relationships between metal concentrations in ground water and in a hydrologically connected river. Hg, Cu, and Zn concentrations in ground...
Early post-fire succession in California chaparral: Changes in diversity, density, cover and biomass
Q. Guo
2001, Ecological Research (16) 471-485
For four consecutive years, following the fires in November 1993, temporal variations in species richness, cover and biomass of component plant groups in early post-fire chaparral succession were monitored on different aspects at the Stunt Ranch Santa Monica Mountains Reserve, southern California. Plant groups were categorized based on growth form,...
Shallow-storage conditions for the rhyolite of the 1912 eruption at Novarupta, Alaska
Michelle L. Coombs, James E. Gardner
2001, Geology (29) 775-778
Recent studies have proposed contrasting models for the plumbing system that fed the 1912 eruption of Novarupta, Alaska. Here, we investigate the conditions under which the rhyolitic part of the erupted magma last resided in the crust prior to eruption. Geothermometry suggests that the rhyolite was held at ∼800-850 °C,...
Trends in total phosphorus and total nitrogen concentrations of tributaries to the Swan - Canning Estuary, 1987 to 1998
R. Donohue, W.A. Davidson, N.E. Peters, S. Nelson, B. Jakowyna
2001, Hydrological Processes (15) 2411-2434
Temporal wet-season trends from 1987 to 1998 of total N and total P concentrations (TN and TP, respectively) in 14 tributaries to the Swan-Canning Estuary in Western Australia were evaluated using the Mann-Kendall or Seasonal kendall tests. Six of the catchments drained clay soils primarily on the Darling Plateau, which...
Secretion of whey acidic protein and cystatin is down regulated at mid-lactation in the red kangaroo (Macropus rufus)
K.R. Nicholas, J.A. Fisher, E. Muths, J. Trott, P.A. Janssens, C. Reich, D.C. Shaw
2001, Conference Paper, Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
Milk collected from the red kangaroo (Macropus rufus) between day 100 and 260 of lactation showed major changes in milk composition at around day 200 of lactation, the time at which the pouch young begins to temporarily exit the pouch and eat herbage. The carbohydrate content of milk declined abruptly...
New Publications of the U.S. Geological Survey, January-March 2001
Water Resources Division, U.S. Geological Survey
2001, Report
A list of USGS publications and articles by U.S. Geological Survey personnel in non-U.S. Geological Survey journals and books that were published in January to March of the year 2001....
Residence times and diel passage distributions of radio-tagged juvenile spring chinook salmon and steelhead in a gatewell and fish collection channel of a Columbia River Dam
J.W. Beeman, A.G. Maule
2001, North American Journal of Fisheries Management (21) 455-463
The amount of time radio-tagged juvenile spring chinook salmon Oncorhynchus tshawytscha and juvenile steelhead O. mykiss spent within a gatewell and the juvenile collection channel at McNary Dam, Columbia River, USA, was measured to determine the diel passage behavior and residence times within these portions of the juvenile bypass system....
Statistical properties of relative weight distributions of four salmonid species and their sampling implications
M.W. Hyatt, W.A. Hubert
2001, North American Journal of Fisheries Management (21) 666-670
We assessed relative weight (Wr) distributions among 291 samples of stock-to-quality-length brook trout Salvelinus fontinalis, brown trout Salmo trutta, rainbow trout Oncorhynchus mykiss, and cutthroat trout O. clarki from lentic and lotic habitats. Statistics describing Wr sample distributions varied slightly among species and habitat types. The average sample was leptokurtotic...
