Smectite diagenesis, pore-water freshening, and fluid flow at the toe of the Nankai wedge
K. M. Brown, D.M. Saffer, B.A. Bekins
2001, Earth and Planetary Science Letters (194) 97-109
The presence of low-chloride fluids in the lowermost sediments drilled at Ocean Drilling Program Site 808, at the Nankai accretionary wedge, has been considered as prime evidence for long-distance, lateral fluid flow from depth. Here, we re-evaluate the potential role of in situ reaction of smectite (S) to illite (I)...
Decreased glutathione S-transferase expression and activity and altered sex steroids in Lake Apopka brown bullheads (Ameriurus nebulosus)
E.P. Gallagher, T. S. Gross, K.M. Sheehy
2001, Aquatic Toxicology (55) 223-237
A number of freshwater lakes and reclaimed agricultural sites in Central Florida have been the receiving waters for agrochemical and municipal runoff. One of these sites, Lake Apopka, is also a eutrophic system that has been the focus of several case studies reporting altered reproductive activity linked to bioaccumulation of...
Standard reference water samples for rare earth element determinations
P. L. Verplanck, Ronald C. Antweiler, D. Kirk Nordstrom, Howard E. Taylor
2001, Applied Geochemistry (16) 231-244
Standard reference water samples (SRWS) were collected from two mine sites, one near Ophir, CO, USA and the other near Redding, CA, USA. The samples were filtered, preserved, and analyzed for rare earth element (REE) concentrations (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb,...
New digital magnetic anomaly database for North America
C. A. Finn, M. Pilkington, A. Cuevas, I. Hernandez, Jaime Urrutia
2001, The Leading Edge (20) 870-872
The Geological Survey of Canada (GSC), U.S. Geological Survey (USGS), and Consejo de Recursos Minerales of Mexico (CRM) are compiling an upgraded digital magnetic anomaly database and map for North America. This trinational project is expected to be completed by late 2002....
Managing exotic grasses and conserving declining species
D.J. Germano, G. B. Rathbun, L.R. Saslaw
2001, Wildlife Society Bulletin (29) 551-559
Some simple guides to finding useful information in exploration geochemical data
D.A. Singer, R. Kouda
2001, Natural Resources Research (10) 137-147
Most regional geochemistry data reflect processes that can produce superfluous bits of noise and, perhaps, information about the mineralization process of interest. There are two end-member approaches to finding patterns in geochemical data—unsupervised learning and supervised learning. In unsupervised learning, data are processed and the geochemist is given the task...
Effect of 2,4-Dichlorophenoxyacetic acid herbicide Escherichia coli growth, chemical, composition, and cellular envelope
R.S. Carr, J.M. Biedenbach, R.L. Hooten
2001, Environmental Toxicology (16) 43-53
2,4-Dichlorophenoxyacetic acid (2,4-D) is a herbicide widely used in the world and mainly excreted by the renal route in exposed humans and animals. Herbicides can affect other nontarget organisms, such as Escherichia coli. We observed that a single exposure to 1 mM 2,4-D diminished growth and total protein content in...
Decline of disjunct green salamander (Aneides aeneus) populations in the southern appalachians
Jeffrey D. Corser
2001, Biological Conservation (97) 119-126
Coincident with other amphibians around the world Aneides aeneus, a terrestrial plethodontid salamander, suffered a population collapse in a disjunct portion of its range in the mid-late 1970s. Long-term monitoring of seven historical green salamander populations throughout the 1990s showed a 98% decline in relative abundance since 1970. Three out...
Distribution of fine-scale mantle heterogeneity from observations of Pdiff coda
P.S. Earle, P.M. Shearer
2001, Bulletin of the Seismological Society of America (91) 1875-1881
We present stacked record sections of Global Seismic Network data that image the average amplitude and polarization of the high-frequency Pdiff coda and investigate their implications on the depth extent of fine-scale (~10 km) mantle heterogeneity. The extended 1-Hz coda lasts for at least 150 sec and is observed to...
Experimental repatriation of boreal toad (Bufo boreas) eggs, metamorphs, and adults in Rocky Mountain National Park
E. Muths, T. L. Johnson, P.S. Corn
2001, Southwestern Naturalist (46) 106-113
The boreal toad (Bufo boreas) is an endangered species in Colorado and is considered a candidate species for federal listing by the United States Fish and Wildlife Service. Boreal toads are absent from many areas of suitable habitat in the Southern Rocky Mountains of Colorado presumably due to a combination...
Analysis of radiation-induced small Cu particle cluster formation in aqueous CuCl2
Sumedha Jayanetti, Robert A. Mayanovic, Alan J. Anderson, William A. Bassett, I.-M. Chou
2001, Journal of Chemical Physics (115) 954-962
Radition-induced small Cu particle cluster formation in aqueous CuCl2 was analyzed. It was noticed that nearest neighbor distance increased with the increase in the time of irradiation. This showed that the clusters approached the lattice dimension of bulk copper. As the average cluster size approached its bulk dimensions, an increase...
Fish species composition two second-order headwater streams the North Central Appalachians ecoregion
M. N. DiLauro, R. M. Bennett
2001, Journal of Freshwater Ecology (16) 35-43
Fish species composition was determined for two second-order headwater streams within the North Central Appalachians ecoregion in northern Pennsylvania. The two streams were widely spaced geographically (over 193 km apart) and occurred in different drainage systems. Streams were sampled in the spring and fall over two years (1996–98) yielding similar...
Microsatellite analyses of the trout of northwest Mexico
J.L. Nielsen, G. Kevin Sage
2001, Genetica (111) 269-278
The trout of northwest Mexico represent an undescribed group of fish considered part of the Oncorhynchus mykiss (Pacific trout) complex of species and subspecies. Recent genetic studies have shown these fish to have important genetic diversity and a unique evolutionary history when compared to coastal rainbow trout. Increased levels of...
Introduction to special issue titled earthquake hazard evaluation in the Central United States
E.S. Schweig, J.S. Gomberg, R. B. Van Arsdale
2001, Engineering Geology (62) 1-5
[No abstract available]...
Snapping turtles (Chelydra serpentina) as monitors for mercury contamination of aquatic environments
W.J. Golet, T.A. Haines
2001, Environmental Monitoring and Assessment (71) 211-220
We assessed the distribution of mercury in snapping turtles (Chelydra serpentina) by analyzing front shoulder muscle, back leg muscle, tail muscle, blood, liver, and marginal carapacial scute (shell) of 26 adult turtles from five small lakes. Total mercury concentration in muscle ranged from 50 to500 ng g−1 wet weight and was...
Standardized seawater rearing of chinook salmon smolts to evaluate hatchery practices showed low statistical power
Aldo N. Palmisano, N.E. Elder
2001, Transactions of the American Fisheries Society (130) 409-416
We examined, under standardized conditions, seawater survival of chinook salmon Oncorhynchus tshawytscha at the smolt stage to evaluate the experimental hatchery practices applied to their rearing. The experimental rearing practices included rearing fish at different densities; attempting to control bacterial kidney disease with broodstock segregation, erythromycin injection, and an experimental...
A portfolio approach to evaluating natural hazard mitigation policies: An application to lateral-spread ground failure in coastal California
R. L. Bernknopf, L.B. Dinitz, S.J.M. Rabinovici, A.M. Evans
2001, International Geology Review (43) 424-440
In the past, efforts to prevent catastrophic losses from natural hazards have largely been undertaken by individual property owners based on site—specific evaluations of risks to particular buildings. Public efforts to assess community vulnerability and encourage mitigation have focused on either aggregating site—specific estimates or adopting standards based upon broad...
Salmonberry and salal annual aerial stem production: The maintenance of shrub cover in forest stands
J. C. Tappeiner II, J. Zasada, D. Huffman, L. Ganio
2001, Canadian Journal of Forest Research (31) 1629-1638
Annual sprouting of aerial stems and ramets enables populations of salmonberry (Rubus spectabilis Pursh), salal (Gaultheria shallon Pursh), and probably other forest shrubs to maintain dense covers (>20 000 stems/ha). We studied annual stem production of salmonberry on cut (all stems cut within 15 cm of the ground) and uncut...
Recent formation of arroyos in the Little Missouri Badlands of southwestern North Dakota
M.A. Gonzalez
2001, Geomorphology (38) 63-84
In the Little Missouri Badlands of southwestern North Dakota, the channels of ephemeral streams are incised 2 to 10 m or more into mid-to-late Holocene alluvium. The objectives of this study were to determine the timing and cause(s) of the most recent episodes of fluvial incision and to develop a...
Monitoring of Lost River and shortnose suckers at shoreline spawning areas in Upper Klamath Lake, Oregon
B.S. Hayes, R.S. Shively, E.C. Janney, G.N. Blackwood
2001, Report
Abstract not available...
Effects of water-level fluctuations on resident fish larvae and age-0 juveniles in the Hanford Reach of the Columbia River during July-September 1998-2000
D.M. Gadomski, P. Wagner
2001, Report
Abstract not available...
Upstream migration of Pacific lampreys in the John Day River: behavior, timing and habitat use. Presentation of research 2000
J.M. Bayer, T.C. Robinson, J.G. Seelye
2001, Report
Abstract not available...
Survival estimates of migrant juvenile salmonids in the Columbia River from John Day Dam through Bonneville Dam using radio-telemetry. Annual report 2000
T.D. Counihan, J.H. Petersen
2001, Report
Abstract not available...
Biological evaluation of the behavioral guidance structure at Lower Granite dam on the Snake River, Washington in 1998
N.S. Adams, G. E. Johnson, D.W. Rondorf, S.M. Anglea, T. Wik
2001, Book chapter, Behavioral technologies for fish guidance: Symposium 26
Abstract not available...
Organochlorine concentrations and eggshell thickness in failed eggs of the California Clapper rail from south San Francisco Bay
Steven E. Schwarzbach, John D. Henderson, Carmen Thomas, Joy D. Albertson
2001, Condor (103) 620-624
In 1992 we collected 22 failed California Clapper Rail (Rallus longirostris obsoletus) eggs from four tidal marshes of south San Francisco Bay for organochlorine analysis and determination of eggshell thickness. Mean eggshell thickness of these eggs (262 microns) was not statistically distinguishable from that of pre-1932 museum eggs (271 microns)....
