Magnesium compounds
D.A. Kramer
2006, Mining Engineering (58) 44-45
In 2005, seawater and natural brines accounted for 51% of US magnesium compounds production. World magnesia production was estimated to be 14.5 Mt. Most of the production came from China, North Korea, Russia and Turkey. Although no specific production figures are available, Japan and the United States are estimated to...
USGS/National Wildlife Health Center's Quarterly Wildlife Mortality Report
R. Sohn, K. A. Converse, G. McLaughlin
2006, Supplement to the Journal of Wildlife Diseases (42)
Industrial sand and gravel
T.P. Dolley
2006, Mining Engineering (58) 38
In 2005, domestic production of industrial sand and gravel was about 31 Mt, a 5% increase from 2004. This increase was bouyed by robust construction and petroleum sectors of the US economy. Based on estimated world production figures, the United States was the world's leading producer and consumer of industrial...
Reproductive and early life stages pathology - Histopathology workshop report
D.W. Bruno, B. Nowak, Diane G. Elliott
2006, Bulletin of the European Association of Fish Pathologists (26) 55-56
Pathology occurring during reproduction and larval development represents an important part of the life cycle of fish, and the diseases that affect eggs and larvae often result in significant losses. However, mortality during this period is frequently ignored or poorly researched as the temptation is to replace the losses rather...
Microhabitat use, home range, and movements of the alligator snapping turtle, Macrochelys temminckii, in Oklahoma
J.D. Riedle, P.A. Shipman, S. F. Fox, David M. Leslie Jr.
2006, Southwestern Naturalist (51) 35-40
Little is known about the ecology of the alligator snapping turtle, Macrochelys temminckii, particularly dentography and behavior. To learn more about the species in Oklahoma, we conducted a telemetry project on 2 small streams at Sequoyah National Wildlife Refuge, an 8,417.5-ha refuge located in east-central Oklahoma. Between June 1999 and...
Traversing a boreal forest landscape: Summer movements of Tule Greater White-fronted Geese
Craig R. Ely, K.S. Bollinger, Jerry W. Hupp, D.V. Derksen, J. Terenzi, John Y. Takekawa, D.L. Orthmeyer, T.C. Rothe, M.J. Petrula, D.R. Yparraguirre
2006, Waterbirds (29) 43-55
We monitored the movement, distribution and site affinities of radio-marked Tule Greater White-fronted Geese (Anser albifrons elgasi) during spring and summer in Alaska, 1994-1997 and 2004. Our assessment of summer movements was comprehensive, as locations were obtained during prenesting, nesting, and molt for over 90% of geese with active radios...
Climate model biases in seasonality of continental water storage revealed by satellite gravimetry
Sean Swenson, P. C. D. Milly
2006, Water Resources Research (42)
Satellite gravimetric observations of monthly changes in continental water storage are compared with outputs from five climate models. All models qualitatively reproduce the global pattern of annual storage amplitude, and the seasonal cycle of global average storage is reproduced well, consistent with earlier studies. However, global average agreements mask systematic...
Site-specific effects on productivity of an upper trophic-level marine predator: Bottom-up, top-down, and mismatch effects on reproduction in a colonial seabird
R.M. Suryan, D.B. Irons, E.D. Brown, P.G.R. Jodice, D.D. Roby
2006, Progress in Oceanography (68) 303-328
We investigated the relative roles of bottom-up and top-down factors in limiting productivity of an upper trophic level marine predator. Our primary working hypothesis was that the reproductive success of black-legged kittiwakes (Rissa tridactyla) a piscivorous, colonial-nesting seabird, was most limited by the abundance, distribution, and species composition of surface-schooling...
Effects of heavy metals on the litter consumption by the earthworm Lumbricus rubellus in field soils
P.H.F. Hobbelen, J.E. Koolhaas, C.A.M. van Gestel
2006, Pedobiologia (50) 51-60
Aim of this study was to determine effects of heavy metals on litter consumption by the earthworm Lumbricus rubellus in National Park the "Brabantsche Biesbosch", the Netherlands. Adult L. rubellus were collected from 12 polluted and from one unpolluted field site. Earthworms collected at the unpolluted site were kept in...
Evidence for hydraulic heterogeneity and anisotropy in the mostly carbonate Prairie du Chien Group, southeastern Minnesota, USA
R.G. Tipping, Anthony C. Runkel, E.C. Alexander Jr., S.C. Alexander, J.A. Green
2006, Sedimentary Geology (184) 305-330
In southeastern Minnesota, Paleozoic bedrock aquifers have typically been represented in groundwater flow simulations as isotropic, porous media. To obtain a more accurate hydrogeologic characterization of the Ordovician Prairie du Chien Group, a new approach was tested, combining detailed geologic observations, particularly of secondary porosity, with hydraulic data. Lithologic observations...
USGS National Wildlife Health Center's Quartlerly Wildlife Mortality Report
K. A. Converse, G. McLaughlin, Lori Steckervetz
2006, Supplement to the Journal of Wildlife Diseases (42)
USGS National Wildlife Health Center's Quarterly Wildlife Mortality Report
R. Sohn, K. A. Converse, G. McLaughlin
2006, Supplement to the Journal of Wildlife Diseases (42)
Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA
R.C. Krueger, B.L. Kerans, E.R. Vincent, C. Rasmussen
2006, Ecological Applications (16) 770-783
Myxobolus cerebralis, the parasite that causes salmonid whirling disease, has had detrimental effects on several salmonid populations in the Intermountain West, including the rainbow trout in the Madison River, Montana, USA. The goal of this study was to examine relationships among characteristics of the environment, Tubifex tubifex (the alternate host)...
Stable carbon isotope depth profiles and soil organic carbon dynamics in the lower Mississippi Basin
J.G. Wynn, J.W. Harden, T. L. Fries
2006, Geoderma (131) 89-109
Analysis of depth trends of 13C abundance in soil organic matter and of 13C abundance from soil-respired CO2 provides useful indications of the dynamics of the terrestrial carbon cycle and of paleoecological change. We measured depth trends of 13C abundance from cropland and control pairs of soils in the lower...
An annotated list of aquatic insects of Fort Sill, Oklahoma, excluding diptera with notes on several new state records
R.E. Zuellig, B.C. Kondratieff, J.P. Schmidt, R.S. Durfee, D.E. Ruiter, I.E. Prather
2006, Journal of the Kansas Entomological Society (79) 34-54
Qualitative collections of aquatic insects were made at Fort Sill, Lawton, Oklahoma, between 2002 and 2004. Ephemeroptera, Plecoptera, Trichoptera, Odonata, Coleoptera, aquatic Heteroptera, Neuroptera, and Megaloptera were targeted. Additional records are included from a survey that took place in 1999. More than 11,000 specimens from more than 290 collections were...
North Slope, Alaska: Source rock distribution, richness, thermal maturity, and petroleum charge
K. E. Peters, L. B. Magoon, K. J. Bird, Z. C. Valin, M.A. Keller
2006, American Association of Petroleum Geologists Bulletin (90) 261-292
Four key marine petroleum source rock units were identified, characterized, and mapped in the subsurface to better understand the origin and distribution of petroleum on the North Slope of Alaska. These marine source rocks, from oldest to youngest, include four intervals: (1) Middle-Upper Triassic Shublik Formation, (2) basal condensed section...
Pigs on the plains: Institutional analysis of a Colorado water quality initiative
D. King, N. Burkardt, Lamb B. Lee
2006, International Journal of Public Administration (29) 1411-1430
We used the Legal-Institutional Analysis Model (LIAM) and Advocacy Coalition Framework (ACF) to analyze the campaign over passage of the Colorado Hogs Rule, an initiative passed by the voters in 1998 to require regulation of swine production facilities in Colorado. Used in tandem, LIAM and ACF provided an opportunity to...
Grenvillian magmatism in the northern Virginia Blue Ridge: Petrologic implications of episodic granitic magma production and the significance of postorogenic A-type charnockite
R.P. Tollo, J. N. Aleinikoff, E.A. Borduas, A.P. Dickin, R.H. McNutt, C.M. Fanning
2006, Precambrian Research (151) 224-264
Grenvillian (1.2 to 1.0 Ga) plutonic rocks in northern Virginia preserve evidence of episodic, mostly granitic magmatism that spanned more than 150 million years (m.y.) of crustal reworking. Crystallization ages determined by sensitive high resolution ion microprobe (SHRIMP) U-Pb isotopic analyses of zircon and monazite, combined with results from previous...
Oil resources - Estimates and uncertainties
D. L. Gautier
2006, Conference Paper, Society of Petroleum Engineers, 68th European Association of Geoscientists and Engineers Conference and Exhibition, incorporating SPE EUROPEC 2006, EAGE 2006: Opportunities in Mature Areas
Oil reserves are reasonably well known, but they are not a reliable indicator of longterm supply. Future oil availability will depend upon reserve additions, which are highly uncertain. New reserves will come from three sources: 1) new field discoveries, 2) growth of reserves in existing fields, and 3) development of...
Response of Tridens flavus (L.) A. S. Hitchc. to soil nutrients and disturbance in an early successional old field
Y. A. K. Honu, D.J. Gibson, B.A. Middleton
2006, Journal of the Torrey Botanical Society (133) 421-428
Soil nutrients and disturbance are two of the main abiotic factors that influence plant dominance (canopy cover), density, and fecundity in early successional old field plant communities. The manner in which the dominant species in old field successional systems respond to the interaction of nutrients and disturbance is poorly known....
Holocene environmental and parasequence development of the St. Jones Estuary, Delaware (USA): Foraminiferal proxies of natural climatic and anthropogenic change
E. Leorri, R. Martin, P. McLaughlin
2006, Palaeogeography, Palaeoclimatology, Palaeoecology (241) 590-607
The benthic foraminiferal record of marshes located along western Delaware Bay (St. Jones Estuary, USA) reflects the response of estuaries to sea-level and paleoclimate change during the Holocene. System tracts are recognized and within them parasequences based on sedimentological and foraminiferal assemblages identification. The parasequences defined by foraminiferal assemblages appear...
Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA
Laurie S. Balistrieri, R.N. Tempel, L.L. Stillings, L.A. Shevenell
2006, Applied Geochemistry (21) 1184-1203
This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected...
Examination of the watershed-wide distribution of Escherichia coli along southern Lake Michigan: An integrated approach
R.L. Whitman, M.B. Nevers, M.N. Byappanahalli
2006, Applied and Environmental Microbiology (72) 7301-7310
Recent research has highlighted the occurrence of Escherichia coli in natural habitats not directly influenced by sewage inputs. Most studies on E. coli in recreational water typically focus on discernible sources (e.g., effluent discharge and runoff) and fall short of integrating riparian, nearshore, onshore, and outfall sources. An integrated “beachshed” approach that links E. coli inputs...
Combined time-series resistivity and geochemical tracer techniques to examine submarine groundwater discharge at Dor Beach, Israel
P.W. Swarzenski, W. C. Burnett, W.J. Greenwood, B. Herut, R. Peterson, N. Dimova, Y. Shalem, Y. Yechieli, Y. Weinstein
2006, Geophysical Research Letters (33)
A high-resolution, stationary geophysical and geochemical survey was conducted at Dor Beach, Israel, to examine the shallow coastal hydrogeology and its control on the exchange of submarine groundwater with the shallow Mediterranean Sea. Time-series resistivity profiles using a new 56 electrode (112-m long) marine cable produced detailed profiles of the...
Foreword: Understanding through modeling
C. Zheng, E. Poeter, M. Hill, J. Doherty
2006, Conference Paper, Ground Water
[No abstract available]...
