The Conservation Reserve Program: Planting for the future
Skip Hyberg, Arthur Allen
2006, Fact Sheet 2006-3078
Proceedings are now available from a scientific and technical forum held to review ongoing and planned research, identify lessons learned, and determine future research needs for the purpose of developing a rigorous scientific basis for future CRP policy discussions....
Tamarisk control, water salvage, and wildlife habitat restoration along rivers in the western United States
Patrick B. Shafroth
2006, Fact Sheet 2006-3071
In the latter part of the 19th century, species of the nonnative shrub tamarisk (also called saltcedar; for example, Tamarix ramosissima, T. chinensis) were introduced to the United States for use as ornamental plants for erosion control. By 1877, some naturalized populations had become established, and by the 1960s, tamarisk...
Cassini/VIMS hyperspectral observations of the HUYGENS landing site on Titan
S. Rodriguez, S. Le Mouelic, Christophe Sotin, H. Clenet, R. N. Clark, B. Buratti, R. H. Brown, T. B. McCord, P. D. Nicholson, K. H. Baines
2006, Planetary and Space Science (54) 1510-1523
Titan is one of the primary scientific objectives of the NASA-ESA-ASI Cassini-Huygens mission. Scattering by haze particles in Titan's atmosphere and numerous methane absorptions dramatically veil Titan's surface in the visible range, though it can be studied more easily in some narrow infrared windows. The Visual and Infrared Mapping Spectrometer...
Geographical patterns of human diet derived from stable-isotope analysis of fingernails
G.B. Nardoto, S. Silva, C. Kendall, J.R. Ehleringer, L.A. Chesson, E.S.B. Ferraz, M.Z. Moreira, Jean P. H. B. Ometto, L.A. Martinelli
2006, American Journal of Physical Anthropology (131) 137-146
Carbon and nitrogen isotope ratios of human fingernails were measured in 490 individuals in the western US and 273 individuals in southeastern Brazil living in urban areas, and 53 individuals living in a moderately isolated area in the central Amazon region of Brazil and consuming mostly locally grown foods. In...
Seasonal migration and environmental conditions of Pacific halibut Hippoglossus stenolepis, elucidated from pop-up archival transmitting (PAT) tags
Timothy Loher, Andrew C. Seitz
2006, Marine Ecology Progress Series (317) 259-271
Pop-up archival transmitting (PAT) tags were used to study the fall migration of halibut in the Gulf of Alaska (GOA). We tagged 6 Pacific halibut Hippoglossus stenolepis on summer feeding grounds in the eastern GOA and another 6 in the western GOA from June 13 to August 6, 2002. The...
Hydroacoustic separation of rainbow smelt (Osmerus mordax) age groups in Lake Champlain
Stetter S.L. Parker, L. G. Rudstam, Thomson J.L. Stritzel, D.L. Parrish
2006, Fisheries Research (82) 176-185
Separate assessment of young-of-year (YOY) and yearling-and-older (YAO) fish is desirable from both ecological and management perspectives. Acoustic assessments provide information on fish population size structure in the target strength (TS) distribution, but interpretation of TS distributions must be done carefully, as single age groups can produce multiple TS modes....
Isoeugenol concentrations in rainbow trout (Oncorhynchus mykiss) skin-on fillet tissue after exposure to AQUI-S™ at different temperatures, durations, and concentrations
Jeffery R. Meinertz, Shari L. Greseth, Theresa M. Schreier, Jeffry A. Bernardy, William H. Gingerich
2006, Aquaculture (254) 347-354
AQUI-S™ is a fish anesthetic/sedative approved for use in several countries including Australia, Chile, and New Zealand and is being pursued for use in the United States. Legal use of AQUI-S™ as an anesthetic in U.S. fish culture depends on approval by the U.S. Food and Drug Administration (FDA)....
Lake sturgeon spawning on artificial habitat in the St Lawrence River
J. H. Johnson, S. R. LaPan, R.M. Klindt, A. Schiavone
2006, Journal of Applied Ichthyology (22) 465-470
In 1996, lake sturgeon (Acipenser fulvescens) spawning was documented for the third consecutive year on an artificially placed gravel bed in the St Lawrence River. Two distinct spawning periods were observed in 1996. Spawning initially commenced on 17 June, when water temperature reached 15°C. A second spawning event was documented...
Anomalous postcritical refraction behavior for certain transversely isotropic media
L. Fa, R.L. Brown, J.P. Castagna
2006, Journal of the Acoustical Society of America (120) 3479-3492
Snell's law at the boundary between two transversely isotropic media with a vertical axis of symmetry (VTI media) can be solved by setting up a fourth order polynomial for the sine of the reflection/transmission angles. This approach reveals the possible presence of an anomalous postcritical angle for certain transversely isotropic...
2480 Ma mafic magmatism in the northern Black Hills, South Dakota: A new link connecting the Wyoming and Superior cratons
P.S. Dahl, M.A. Hamilton, J. L. Wooden, K.A. Foland, R. Frei, J.A. McCombs, D.K. Holm
2006, Canadian Journal of Earth Sciences (43) 1579-1600
The Laramide Black Hills uplift of southwest South Dakota exposes a Precambrian crystalline core of ???2560-2600 Ma basement granitoids nonconformably overlain by two Paleoproterozoic intracratonic rift successions. In the northern Black Hills, a 1 km thick, layered sill (the Blue Draw metagabbro) that intrudes the older rift succession provides a...
Two models for evaluating landslide hazards
J.C. Davis, C.-J. Chung, G.C. Ohlmacher
2006, Computers & Geosciences (32) 1120-1127
Two alternative procedures for estimating landslide hazards were evaluated using data on topographic digital elevation models (DEMs) and bedrock lithologies in an area adjacent to the Missouri River in Atchison County, Kansas, USA. The two procedures are based on the likelihood ratio model but utilize different assumptions. The empirical likelihood...
New ghost-node method for linking different models with varied grid refinement
S.C. James, J.E. Dickinson, S.W. Mehl, M. C. Hill, S. A. Leake, G.A. Zyvoloski, A.-A. Eddebbarh
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
A flexible, robust method for linking grids of locally refined ground-water flow models constructed with different numerical methods is needed to address a variety of hydrologic problems. This work outlines and tests a new ghost-node model-linking method for a refined "child" model that is contained within a larger and coarser...
The use of landsat 7 enhanced thematic mapper plus for mapping leafy spurge
C.S. Mladinich, M.R. Bustos, S. Stitt, R. Root, K. Brown, G.L. Anderson, S. Hager
2006, Rangeland Ecology and Management (59) 500-506
Euphorbia esula L. (leafy spurge) is an invasive weed that is a major problem in much of the Upper Great Plains region, including parts of Montana, South Dakota, North Dakota, Nebraska, and Wyoming. Infestations in North Dakota alone have had a serious economic impact, estimated at $87 million annually in...
The influence of aridity and fire on Holocene prairie communities in the eastern Prairie Peninsula
D.M. Nelson, S.H. Feng, E.C. Grimm, B. Brandon Curry, J.E. Slate
2006, Ecology (87) 2523-2536
The role of climate and fire in the development, maintenance, and species composition of prairie in the eastern axis of the tallgrass Prairie Peninsula intrigued early North American ecologists. However, evaluation of the long-standing hypotheses about the region's environmental history has been hampered by the scarcity of paleorecords. We conducted...
Is extinction age dependent?
N.A. Doran, A.J. Arnold, W.C. Parker, F.W. Huffer
2006, Palaios (21) 571-579
Age-dependent extinction is an observation with important biological implications. Van Valen's Red Queen hypothesis triggered three decades of research testing its primary implication: that age is independent of extinction. In contrast to this, later studies with species-level data have indicated the possible presence of age dependence. Since the formulation of...
Isotopic insights into smoothening of abandoned fan surfaces, Southern California
A. Matmon, K. Nichols, R. Finkel
2006, Quaternary Research (66) 109-118
Cosmogenic nuclide concentrations measured on abandoned fan surfaces along the Mojave section of the San Andreas Fault suggest that sediment is generated, transported, and removed from the fans on the order of 30-40??kyr. We measured in situ produced cosmogenic 10Be, and in some cases 26Al, in boulders (n??=??15), surface sediment...
Prediction of resource volumes at untested locations using simple local prediction models
Emil D. Attanasi, Timothy C. Coburn, Philip A. Freeman
2006, Natural Resources Research (15) 223-239
This paper shows how local spatial nonparametric prediction models can be applied to estimate volumes of recoverable gas resources at individual undrilled sites, at multiple sites on a regional scale, and to compute confidence bounds for regional volumes based on the distribution of those estimates. An approach that combines cross-validation,...
Temporal variations in slip rate of the White Mountain Fault Zone, Eastern California
E. Kirby, D.W. Burbank, M. Reheis, F. Phillips
2006, Earth and Planetary Science Letters (248) 153-170
The evolution of fault slip through time may yield insight into the geodynamics of deforming lithosphere. Precise determination of temporal variations in fault slip is often hindered, however, by a dearth of markers of varying age from which to reconstruct fault slip. Here we determine slip rates across the White...
Geology and geochemistry of jasperoids from the Gold Bar district, Nevada
O. Yigit, A. H. Hofstra, M.W. Hitzman, E.P. Nelson
2006, Mineralium Deposita (41) 527-547
Gold Bar is one of several Carlin-type gold mining districts located in the Battle Mountain-Eureka trend, Nevada. It is composed of one main deposit, Gold Bar; five satellite deposits; and four resources that contain 1.6 Moz (50 t) of gold. All of the deposits and resources occur at the intersection...
A reexamination of age-related variation in body weight and morphometry of Maryland nutria
M. H. Sherfy, T.A. Mollett, K.R. McGowan, S.L. Daugherty
2006, Journal of Wildlife Management (70) 1132-1141
Age-related variation in morphometry has been documented for many species. Knowledge of growth patterns can be useful for modeling energetics, detecting physiological influences on populations, and predicting age. These benefits have shown value in understanding population dynamics of invasive species, particularly in developing efficient control and eradication programs. However, development...
Research approach to teaching groundwater biodegradation in karst aquifers
L. King, T. Byl, R. Painter
2006, Conference Paper, ASEE Annual Conference and Exposition, Conference Proceedings
TSU in partnership with the USGS has conducted extensive research regarding biode??gradation of contaminants in karst aquifers. This research resulted in the development of a numerical approach to modeling biodegradation of contaminants in karst aquifers that is taught to environmental engineering students in several steps. First, environmental engineering students are...
Mississippi delta mudflow activity and 2005 gulf hurricanes
J.P. Walsh, D.R. Corbett, D. Mallinson, M. Goni, M. Dail, C. Loewy, K. Marciniak, K. Ryan, C. Smith, A. Stevens, B. Summers, T. Test
2006, Eos, Transactions, American Geophysical Union (87) 477-479
[No abstract available]...
Incorporating diverse data and realistic complexity into demographic estimation procedures for sea otters
M. Timothy Tinker, Daniel F. Doak, James A. Estes, Brian B. Hatfield, Michelle M. Staedler, Arthur Gross
2006, Ecological Applications (16) 2293-2312
Reliable information on historical and current population dynamics is central to understanding patterns of growth and decline in animal populations. We developed a maximum likelihood-based analysis to estimate spatial and temporal trends in age/sex-specific survival rates for the threatened southern sea otter (Enhydra lutris nereis), using annual population censuses and...
Radiometric ages of the Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian, Duckmantian]: A comparison of U-Pb zircon single-crystal ages and 40Ar/39Ar sanidine single-crystal plateau ages
P.C. Lyons, T.E. Krogh, Y.Y. Kwok, D.W. Davis, W.F. Outerbridge, H. T. Evans Jr.
2006, International Journal of Coal Geology (67) 259-266
The Fire Clay tonstein [Pennsylvanian (Upper Carboniferous), Westphalian Series, Duckmantian Stage]-a kaolinized, volcanic-ash deposit occurring in Kentucky, West Virginia, Tennessee, and Virginia-is the most widespread bed in the Middle Pennsylvanian of the central Appalachian basin, USA. A concordant single-crystal U-Pb zircon datum for this tonstein gives a 206Pb/238U age of...
Solute sources in stream water during consecutive fall storms in a northern hardwood forest watershed: A combined hydrological, chemical and isotopic approach
M.J. Mitchell, K.B. Piatek, S. Christopher, B. Mayer, C. Kendall, P. McHale
2006, Biogeochemistry (78) 217-246
Understanding the effects of climate change including precipitation patterns has important implications for evaluating the biogeochemical responses of watersheds. We focused on four storms in late summer and early fall that occurred after an exceptionally dry period in 2002. We analyzed not only the influence of these storms on...
