E. R. Landa
2006, Geotimes (51) 60
No abstract available....
Search Results
183982 results.
Alternate formats: RIS file of the first 3000 search results | Download all results as CSV | TSV | Excel | RSS feed based on this search | JSON version of this page of results
Page 2422, results 60526 - 60550
Publication Extents
Not all publications have extents, not all extents are completely accurateM. S. Sepulveda, Piero F. Del, J.J. Wiebe, H.R. Rauschenberger, T. S. Gross
2006, Journal of Wildlife Diseases (42) 56-73
Increased American alligator (Alligator mississippiensis) embryo and neonatal mortality has been reported from several northcentral Florida lakes contaminated with old-use organochlorine pesticides (OCPs). However, a clear relationship among these contaminants and egg viability has not been established, suggesting the involvement of additional factors in these mortalities. Thus, the main objective...
K. Kannan, E. Perrotta, N. J. Thomas
2006, Environmental Science & Technology (40) 4943-4948
Concentrations of four perfluorinated contaminants, including perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA), were measured in liver tissue from 80 adult female sea otters collected from the California coast during 1992a??2002. Concentrations of PFOS and PFOA were in the ranges of <1a??884 and <5a??147 ng/g, wet wt, respectively. Concentrations of PFOA...
E. Biggins, D.M. Biggins
2006, Southwestern Naturalist (51) 119-122
We observed an attack by a bobcat (Lynx rufus) on a cottontail rabbit (Sylvilagus) that involved stealthy approach by the cat for >1 h, followed by a 12.3-s chase covering 116.0 m for the cat and 128.4 m for the rabbit. During the chase, the route of the cat from...
Y. Morales, L.J. Weber, A.E. Mynett, T.J. Newton
2006, Journal of the North American Benthological Society (25) 664-676
A numerical model for simulation of freshwater mussel dynamics was used to investigate the effects of substrate and hydrodynamic conditions on the formation of mussel beds in a 10-km reach of the Upper Mississippi River (UMR). Suitable habitats for mussel survival were identified by creating a dimensionless parameter (shear stress...
J.C. Jackson, J. Wright Horton Jr., I.-M. Chou, H. E. Belkin
2006, American Mineralogist (91) 604-608
A shock-induced polymorph (TiO2II) of anatase and rutile has been identified in breccias from the late Eocene Chesapeake Bay impact structure. The breccia samples are from a recent, partially cored test hole in the central uplift at Cape Charles, Virginia. The drill cores from 744 to 823 m depth consist...
W. R. Normark, D.J.W. Piper, R. Sliter
2006, Sedimentology (53) 867-897
Small turbidite systems offshore from southern California provide an opportunity to track sediment from river source through the turbidity-current initiation process to ultimate deposition, and to evaluate the impact of changing sea level and tectonics. The Santa Monica Basin is almost a closed system for terrigenous sediment input, and is...
Gary L. Krapu, J.L. Eldridge, C. L. Gratto-Trevor, D. A. Buhl
2006, The Auk (123) 323-334
We measured fresh body mass, total body fat, and fat-free dry mass (FFDM) of three species of Arctic-nesting calidrid sandpipers (Baird's Sandpiper [Calidris bairdii], hereafter “BASA”; Semipalmated Sandpiper [C. pusilla], hereafter “SESA”; and White-rumped Sandpiper [C. fuscicollis], hereafter “WRSA”) during spring stopovers in the Prairie Pothole Region (PPR) of North...
W.G. Cope, M.R. Bartsch, J.E. Hightower
2006, Journal of Molluscan Studies (72) 179-188
The aim of this study was to document and model the population dynamics of zebra mussels Dreissena polymorpha (Pallas, 1771) in Pool 8 of the Upper Mississippi River (UMR), USA, for five consecutive years (1992-1996) following their initial discovery in September 1991. Artificial substrates (concrete blocks, 0.49 m2 surface area)...
P.F. Greenwood, J.A. Leenheer, C. McIntyre, L. Berwick, P.D. Franzmann
2006, Organic Geochemistry (37) 597-609
Hopane biomarker products were detected using microscale sealed vessel (MSSV) pyrolysis gas chromatography-mass spectrometry (GC-MS) analysis of dissolved organic matter from natural aquatic systems colonised by bacterial populations. MSSV pyrolysis can reduce the polyhydroxylated alkyl side chain of bacteriohopanepolyols, yielding saturated hopane products which are more amenable to GC-MS detection...
L. P. Gough, R. G. Eppinger, Paul H. Briggs, S. Giles
2006, Arctic, Antarctic, and Alpine Research (38) 522-529
We report on the geochemistry of soil and bryophyte-laden sediment and on the biogeochemistry of willows growing in an undisturbed volcanogenic massive sulfide deposit in the Alaska Range ecoregion of east-central Alaska. We also describe an unusual bryophyte assemblage found growing in the acidic metal-rich waters that drain the area....
K. W. Krauss, T.W. Doyle, R.R. Twilley, V. H. Rivera-Monroy, J.K. Sullivan
2006, Hydrobiologia (569) 311-324
Low and high water periods create contrasting challenges for trees inhabiting periodically flooded wetlands. Low to moderate flood durations and frequencies may bring nutrient subsidies, while greater hydroperiods can be energetically stressful because of oxygen deficiency. We tested the hypothesis that hydroperiod affects the growth of mangrove seedlings and saplings...
G.-Q. Wang, G.-Q. Tang, D.M. Boore, Burbach G. Van Ness G., C.R. Jackson, X.-Y. Zhou, Q.-L. Lin
2006, Bulletin of the Seismological Society of America (96) 821-845
Significant surface waves were recorded in the western coastal plain (WCP) of Taiwan during the 1999 Chi-Chi, Taiwan, earthquake and its series of aftershocks. We study in detail the surface waves produced by one aftershock (20 September 1999, 18hr 03m 41.16sec, M 6.2) in this paper. We take the Chelungpu-Chukou...
J. Xia, Y. Xu, C. Chen, R.D. Kaufmann, Y. Luo
2006, Soil Dynamics and Earthquake Engineering (26) 395-403
We discuss five useful equations related to high-frequency surface-wave techniques and their implications in practice. These equations are theoretical results from published literature regarding source selection, data-acquisition parameters, resolution of a dispersion curve image in the frequency-velocity domain, and the cut-off frequency of high modes. The first equation suggests Rayleigh...
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...
R. Snieder, E. Safak
2006, Bulletin of the Seismological Society of America (96) 586-598
The motion of a building depends on the excitation, the coupling of the building to the ground, and the mechanical properties of the building. We separate the building response from the excitation and the ground coupling by deconvolving the motion recorded at different levels in the building and apply this...
M.K. Laubhan, T.L. Shaffer
2006, Wetlands (26) 69-78
Cirsium arvense and Lepidium latifolium are species that can aggressively invade wetland margins and potentially reduce biodiversity and alter ecosystem function. Although expansion of these species primarily occurs via rhizomatous growth, seeds are thought to be important in initial establishment. We conducted this study to investigate differences in seed germination...
M.C. Quist, M.R. Bower, W.A. Hubert
2006, Southwestern Naturalist (51) 22-27
Native fishes of the Upper Colorado River Basin have experienced substantial declines in abundance and distribution, and are extirpated from most of Wyoming. Muddy Creek, in south-central Wyoming (Little Snake River watershed), contains sympatric populations of native roundtail chub (Gila robusta), bluehead sucker, (Catostomus discobolus), and flannelmouth sucker (C. tatipinnis),...
D.R. Muhs, K. R. Simmons, G. L. Kennedy, K.R. Ludwig, L.T. Groves
2006, Conference Paper, Quaternary Science Reviews
New high-precision thermal ionization mass-spectrometric (TIMS) U-series ages of solitary corals (Balanophyllia elegans) from several marine terrace localities along the California and southern Oregon coasts date to the ???80,000 yr BP high stand of sea, correlative with marine isotope substage 5a, late in the last interglacial complex. Ages of multiple...
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...
M.A. Noble, J. P. Xu, G.L. Robertson, L.K. Rosenfeld
2006, Marine Environmental Research (61) 494-510
Fecal indicator bacteria (FIB) were measured approximately 5 days a week in ankle-depth water at 19 surfzone stations along Huntington Beach and Newport Beach, California, from 1998 to the end of 2003. These sampling periods span the time before and after treated sewage effluent, discharged into the coastal ocean from...
R.L. Virta
2006, Mining Engineering (58) 40-41
In 2005, 22 companies mined kaolin in nine US states. Production in Georgia declined to 6.19 Mt down from 6.78 Mt in 2004. Despite the decline, Georgia remained the leading producer state followed by Alabama, South Carolina, Arkansas, Texas, Nevada, California, North Carolina and Florida. In the next year or...
R. L. Reynolds, M. Reheis, J. Yount, P. Lamothe
2006, Journal of Arid Environments (66) 42-61
The recognition and characterization of aeolian dust in soil contribute to a better understanding of landscape and ecosystem dynamics of drylands. Results of this study show that recently deposited dust, sampled in isolated, mostly high-ground settings, is chemically and mineralogically similar on varied geologic substrates over a large area (15...
K.R. Shaffer
2006, Mining Engineering (58) 90-92
In 2005, the Indiana industrial minerals industry generated $789 million, a record high for the state and an increase of 2.2% from 2004. Among all states, Indiana ranked 24th. Mineral commodities produced in the state included crushed limestone and dolomite, construction sand and gravel, industrial sand, dimension limestone, dimension sandstone,...
D. B. Stoeser, C.D. Frost
2006, Chemical Geology (226) 163-188
New Nd, Sr and O isotopic data for granitoid rocks of the Saudi Arabian Shield are presented together with published Nd, Pb, Sr and O isotopic data and all available geologic and geochronologic information to re-evaluate the terranes defined for the Saudi Arabian part of the Arabian-Nubian Shield. Three groups...