Evaluation of the persistence of micropollutants through pure-oxygen activated sludge nitrification and denitrification
A.D. Levine, M. T. Meyer, G. Kish
2006, Water Environment Research (78) 2276-2285
The persistence of pharmaceuticals, hormones, and household and industrial chemicals through a pure-oxygen activated sludge, nitrification, denitrification wastewater treatment facility was evaluated. Of the 125 micropollutants that were tested in this study, 55 compounds were detected in the untreated wastewater, and 27 compounds were detected in the disinfected effluent. The...
Ecology of an estuarine mysid shrimp in the Columbia River (USA)
C. A. Haskell, J. A. Stanford
2006, River Research and Applications (22) 739-753
The estuarine mysid, Neomysis mercedis, has colonized John Day and other run-of-the-river Reservoirs of the Columbia River, over 400 km from the estuary. In John Day Reservoir N. mercedis numbers peaked (2 m-3) in August in areas near the dam in association with lower water velocity and softer bottom than...
Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations
R. Hohn, M. Isenbeck-Schroter, D.B. Kent, J.A. Davis, R. Jakobsen, S. Jann, V. Niedan, C. Scholz, S. Stadler, A. Tretner
2006, Journal of Contaminant Hydrology (88) 36-54
To study transport and reactions of arsenic under field conditions, a small-scale tracer test was performed in an anoxic, iron-reducing zone of a sandy aquifer at the USGS research site on Cape Cod, Massachusetts, USA. For four weeks, a stream of groundwater with added As(V) (6.7 μM) and bromide...
Predicting tree species presence and basal area in Utah: A comparison of stochastic gradient boosting, generalized additive models, and tree-based methods
Gretchen G. Moisen, E.A. Freeman, J.A. Blackard, T.S. Frescino, N.E. Zimmermann, T.C. Edwards Jr.
2006, Ecological Modelling (199) 176-187
Many efforts are underway to produce broad-scale forest attribute maps by modelling forest class and structure variables collected in forest inventories as functions of satellite-based and biophysical information. Typically, variants of classification and regression trees implemented in Rulequest's?? See5 and Cubist (for binary and continuous responses, respectively) are the tools...
Continuous borehole strain and pore pressure in the near field of the 28 September 2004 M 6.0 Parkfield, California, earthquake: Implications for nucleation, fault response, earthquake prediction and tremor
M.J.S. Johnston, R. D. Borcherdt, A. T. Linde, M. T. Gladwin
2006, Bulletin of the Seismological Society of America (96) S56-S72
Near-field observations of high-precision borehole strain and pore pressure, show no indication of coherent accelerating strain or pore pressure during the weeks to seconds before the 28 September 2004 M 6.0 Parkfield earthquake. Minor changes in strain rate did occur at a few sites during the last 24 hr before the earthquake...
Buffelgrass fuel loads in Saguaro National Park, Arizona, increase fire danger and threaten native species
T. C. Esque, C.R. Schwalbe, J.A. Lissow, D.F. Haines, D. Foster, M.C. Garnet
2006, Park Science (24)
Scientists examine this exotic grass invasion that threatens to alter the fire regime in the Sonoran Desert and the composition, structure, and function of protected ecosystems....
Effects of livestock watering sites on alien and native plants in the Mojave Desert, USA
M.L. Brooks, J.R. Matchett, K.H. Berry
2006, Journal of Arid Environments (67) 125-147
Increased livestock densities near artificial watering sites create disturbance gradients called piospheres. We studied responses of alien and native annual plants and native perennial plants within 9 piospheres in the Mojave Desert of North America. Absolute and proportional cover of alien annual plants increased with proximity to watering sites, whereas...
Predation on walleye eggs by fish on reefs in western Lake Erie
E.F. Roseman, W.W. Taylor, D.B. Hayes, A.L. Jones, J.T. Francis
2006, Journal of Great Lakes Research (32) 415-423
We examined diets of fishes from gillnet and egg pump collections conducted on reefs in western Lake Erie during walleye (Sander vitreus) egg incubation periods from 1994–1999 and 2004 to assess incidence of walleye eggs in fish diets. We collected no potential egg predators in samples taken in 1994 but...
Infectious haematopoietic necrosis (IHN) virus disease in sockeye salmon (Oncorhynchus nerka)
Diane G. Elliott
D.W. Bruno, D.G. Elliott, B. Nowak, editor(s)
2006, Conference Paper, EAFP 2005 Copenhagen Histopathology Workshop. Reproductive pathology and early life stages pathology: Notes and images
No abstract available....
Influence of layer charge and charge distribution of smectites on the flow behaviour and swelling of bentonites
G.E. Christidis, A.E. Blum, D. D. Eberl
2006, Applied Clay Science (34) 125-138
The influence of layer charge and charge distribution of dioctahedral smectites on the rheological and swelling properties of bentonites is examined. Layer charge and charge distribution were determined by XRD using the LayerCharge program [Christidis, G.E., Eberl, D.D., 2003. Determination of layer charge characteristics of smectites. Clays Clay Miner. 51,...
Multi-species patterns of avian cholera mortality in Nebraska's rainwater basin
Julie A. Blanchong, M.D. Samuel, G. Mack
2006, Journal of Wildlife Diseases (42) 81-91
Nebraska's Rainwater Basin (RWB) is a key spring migration area for millions of waterfowl and other avian species. Avian cholera has been endemic in the RWB since the 1970s and in some years tens of thousands of waterfowl have died from the disease. We evaluated patterns of avian cholera mortality...
The application of acoustic Doppler current profilers to measure the timing and patterns of coral larval dispersal
Curt D. Storlazzi, E.K. Brown, Michael E. Field
2006, Coral Reefs (25) 369-381
An experiment was conducted along the reefs off west Maui, Hawaii, during the summer of 2003 to monitor the spawning of the reef-building coral Montipora capitata and to determine the role of ocean currents in dispersing the larvae from the natal reef. Instruments documented the environmental forcing during the coral...
Geophysical evaluation of the Success Dam foundation, Porterville, California
L. E. Hunter, M.H. Powers, S. Haines, T. Asch, B.L. Burton, D.C. Serafini
2006, Conference Paper, Association of State Dam Safety Officials - Dam Safety 2006, Proceedings from the 2006 Annual Conference
Success Dam is a zonedearth fill embankment located near Porterville, CA. Studies of Success Dam by the recent Dam Safety Assurance Program (DSAP) have demonstrated the potential for seismic instability and large deformation of the dam due to relatively low levels of earthquake shaking. The U.S. Army Corps of Engineers...
Trends in the nutrient enrichment of U.S. rivers during the late 20th century and their relation to changes in probable stream trophic conditions
R. B. Alexander, R. A. Smith
2006, Conference Paper, Limnology and Oceanography
We estimated trends in concentrations of total phosphorus (TP) and total nitrogen (TN) and the related change in the probabilities of trophic conditions from 1975 to 1994 at 250 nationally representative riverine monitoring locations in the U.S. with drainage areas larger than about 1,000 km2. Statistically significant (p < 0.05)...
State summaries: California
S. G. Kohl
2006, Mining Engineering (58) 70-74
According to the United States Geological Survey (USGS), California ranked second behind Arizona among the states in nonfuel mineral production during 2005. It accounted for 7% of the US's total. The market value of mineral production for California amounted to $3.7 billion. During the year, California produced 30 varieties of...
The quest for a safe and effective canine distemper virus vaccine for black-footed ferrets
Jeffrey Wimsatt, Dean E. Biggins, Elizabeth S. Williams, Victor M. Becerra
2006, Conference Paper, Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004 (Scientific Investigations Report 2005-5293)
Canine distemper virus (CDV) causes a systemic disease that is highly virulent to mustelids and other carnivore (Order Carnivora) species and is found worldwide. Endemic canine distemper in wild and domestic carnivores in the United States has made reintroduction of endangered black-footed ferrets (Mustela nigripes) difficult in the absence of...
The quest for the perfect gravity anomaly: Part 1 - New calculation standards
X. Li, T.G. Hildenbrand, W. J. Hinze, Gordon R. Keller, D. Ravat, M. Webring
2006, SEG Technical Program Expanded Abstracts (25) 859-863
The North American gravity database together with databases from Canada, Mexico, and the United States are being revised to improve their coverage, versatility, and accuracy. An important part of this effort is revision of procedures and standards for calculating gravity anomalies taking into account our enhanced computational power, modern satellite-based...
Early mortality syndrome in coho salmon (Oncorhynchus kisutch) and Chinook salmon (O. tshawytscha) in the Great Lakes
Diane G. Elliott
D.W. Bruno, D.G. Elliott, B. Nowak, editor(s)
2006, Conference Paper, EAFP 2005 Copenhagen Histopathology Workshop. Reproductive pathology and early life stages pathology: Notes and images.
No abstract available....
Evaluating light-based geolocation for estimating demersal fish movements in high latitudes
Andrew C. Seitz, Brenda L. Norcross, Derek Wilson, Jennifer L. Nielsen
2006, Fishery Bulletin (104) 571-578
We evaluated light-based geolocation estimates from pop-up satellite tags in high latitudes because some of the largest fisheries in the world are in areas where this technique has not been assessed. Daily longitude and latitude were estimated by using two Wildlife Computers software programs: 1) Argos Message Processor (AMP), which...
Timing of Cenozoic volcanism and Basin and Range extension in northwestern Nevada: New constraints from the northern Pine Forest Range
J.P. Colgan, T.A. Dumitru, M. McWilliams, E. L. Miller
2006, Geological Society of America Bulletin (118) 126-139
Eocene-middle Miocene volcanic rocks in the northern Pine Forest Range, Nevada, are ideally situated for reconstructing the timing and style of volcanism and extensional faulting in the northwesternmost part of the Basin and Range province. A conformable sequence of Cenozoic volcanic and sedimentary strata in the northern Pine Forest Range...
United States of America
D.E. Napton, Thomas R. Loveland
H. Geist, editor(s)
2006, Book chapter, Our Earth's changing land— An encyclopedia of land-use and land-cover change
No abstract available....
Alternative barging strategies to improve survival of transported juvenile salmonids
G.A. McMichael, J.A. Vucelick, B. Ryan, L. Gilbreath, R.L. McComas, Styles Smith, M. Carper, D. Elliot, T. Murray, L. Applegate, C. McKibben
2006, Report
No abstract available ...
Breeding biology of Mottled Ducks on agricultural lands in southwestern Louisiana
R.S. Durham, A. D. Afton
2006, Southeastern Naturalist (5) 311-316
Breeding biology of Anas fulvigula maculosa (Mottled Ducks) has been described in coastal marsh and associated habitats, but little information is available for agricultural habitats in Louisiana. We located nests to determine nest-initiation dates and clutch sizes during the primary breeding season (February-May) in 1999 (n = 29) and 2000...
Mineral resource of the month: mercury
William E. Brooks
2006, Geotimes (2006)
The ore of mercury, cinnabar, is soft and dark red, and native mercury is one of a few metals that is liquid at room temperatures. Cinnabar from Almaden, Spain, the world’s oldest producing mercury mine, was used during Roman times, and the chemical symbol for mercury (Hg) is from "hydrargyrum,"...
Introduction
M.L. Brooks
2006, Book chapter, The Use of Fire as a Tool for Controlling Invasive Plants: Cal-IPC Publication 2006-01
No abstract available at this time...
