Cytherellid species (Ostracoda) and their significance to the Late Quaternary events in the Santos Basin, Brazil
C.T. Bergue, J.C. Coimbra, T. M. Cronin
2007, Senckenbergiana Maritima (37) 5-12
Four autochthonous cytherellid species (Cytherella serratula (BRADY, 1880), C. hermargentina WHATLEY et al. 1998, C. pleistocenica sp. nov. and C. santosensis sp. nov.) have been identified from two offshore cores (44 samples) within the Santos Basin. The distribution of these ostracodes is controlled by local hydrological conditions such as the...
Investigations of adult Lost River, shortnose, and Klamath largescale suckers in Upper Klamath Lake and its tributaries, Oregon. Annual report 2005
P.M. Barry, B.S. Hayes, A.C. Scott, C.D. Luton, E.C. Janney
2007, Report
n/a...
A chronology of Late-Pleistocene permafrost events in southern New Jersey, eastern USA
H.M. French, M. Demitroff, S.L. Forman, Wayne L. Newell
2007, Permafrost and Periglacial Processes (18) 49-59
Frost fissures, filled with wind-abraded sand and mineral soil, and numerous small-scale non-diastrophic deformations, occur in the near-surface sediments of the Pine Barrens of southern New Jersey. The fissures are the result of thermal-contraction cracking and indicate the previous existence of either permafrost or seasonally-frozen ground. The deformations reflect thermokarst...
Effects of sea-level rise on ground water flow in a coastal aquifer system
John P. Masterson, S. P. Garabedian
2007, Ground Water (45) 209-217
The effects of sea-level rise on the depth to the fresh water/salt water interface were simulated by using a density-dependent, three-dimensional numerical ground water flow model for a simplified hypothetical fresh water lens that is similar to shallow, coastal aquifers found along the Atlantic coast of the United States. Simulations...
Fall migration and habitat use of American woodcock in the central United States
N.A. Myatt, D.G. Krementz
2007, Journal of Wildlife Management (71) 1197-1205
Little is known about the migration ecology of the American woodcock (Scolopax minor). From 2001 to 2003, we began a 3-year study to document woodcock fall migration routes, rates, and habitat use from Minnesota, Wisconsin, and Michigan, USA. Some 586 radiomarked woodcock initiated migration. During 224 hours of aerial telemetry,...
Lateral spread hazard mapping of the northern Salt Lake Valley, Utah, for a M7.0 scenario earthquake
M.J. Olsen, S.F. Bartlett, B.J. Solomon
2007, Earthquake Spectra (23) 95-113
This paper describes the methodology used to develop a lateral spread-displacement hazard map for northern Salt Lake Valley, Utah, using a scenario M7.0 earthquake occurring on the Salt Lake City segment of the Wasatch fault. The mapping effort is supported by a substantial amount of geotechnical, geologic, and topographic data...
The viability of a nonenzymatic reductive citric acid cycle - Kinetics and thermochemistry
D.S. Ross
2007, Origins of Life and Evolution of the Biosphere (37) 61-65
The likelihood of a functioning nonenzymatic reductive citric acid cycle, recently proposed as the precursor to biosynthesis on early Earth, is examined on the basis of the kinetics and thermochemistry of the acetate → pyruvate → oxaloacetate → malate sequence. Using data derived from studies of...
Historical trends in creel limits, length-based limits, and season restrictions for black basses in the United States and Canada
C. Paukert, M. McInerny, Ronald Schultz
2007, Fisheries (32) 62-72
We determined for largemouth bass (Micropterus salmoides), smallmouth bass (M. dolomeui), and spotted bass (M. punctulatus) historical trends in state- and province-wide creel limits, length limits, and season closures along with the rationale justifying these regulations. Based on data gathered via mail surveys and the Internet, 55 jurisdictions had state-...
A path-independent integral for the characterization of solute concentration and flux at biofilm detachments
B. Moran, S.S. Kulkarni, H. W. Reeves
2007, International Journal of Fracture (143) 291-300
A path-independent (conservation) integral is developed for the characterization of solute concentration and flux in a biofilm in the vicinity of a detachment or other flux limiting boundary condition. Steady state conditions of solute diffusion are considered and biofilm kinetics are described by an uptake term which can be expressed...
Platinum group elements and gold in ferromanganese crusts from Afanasiy-Nikitin seamount, equatorial Indian Ocean: Sources and fractionation
V.K. Banakar, J.R. Hein, R.P. Rajani, A.R. Chodankar
2007, Journal of Earth System Science (116) 3-13
The major element relationships in ferromanganese (Fe-Mn) crusts from Afanasiy-Nikitin seamount (ANS), eastern equatorial Indian Ocean, appear to be atypical. High positive correlations (r = 0.99) between Mn/Co and Fe/Co ratios, and lack of correlation of those ratios with Co, Ce, and Ce/Co, indicate that the ANS...
Relationships of cadmium, mercury, and selenium with nutrient reserves of female lesser scaup (Aythya affinis) during winter and spring migration
M.J. Anteau, A. D. Afton, Christine M. Custer, T. W. Custer
2007, Environmental Toxicology and Chemistry (26) 515-520
Trace elements may have important effects on body condition of ducks during spring migration, because individuals are experiencing energetically costly events (e.g., migration, nutrient reserve accumulation, pair formation, feather molt, and ovarian follicle development). We examined relationships among hepatic cadmium, mercury, and selenium concentrations (microg/g dry wt) and nutrient reserves...
Late quaternary temperature record from buried soils of the North American Great Plains
L. Nordt, J. Von Fischer, L. Tieszen
2007, Geology (35) 159-162
We present the first comprehensive late Quaternary record of North American Great Plains temperature by assessing the behavior of the stable isotopic composition (δ13C) of buried soils. After examining the relationship between the δ13C of topsoil organic matter and July temperature from 61 native prairies within a latitudinal range of...
DIN retention-transport through four hydrologically connected zones in a headwater catchment of the Upper Mississippi River
F.J. Triska, J.H. Duff, R.W. Sheibley, A. P. Jackman, R.J. Avanzino
2007, Journal of the American Water Resources Association (43) 60-71
Dissolved inorganic nitrogen (DIN) retention-transport through a headwater catchment was synthesized from studies encompassing four distinct hydrologic zones of the Shingobee River Headwaters near the origin of the Mississippi River. The hydrologic zones included: (1) hillslope ground water (ridge to bankside riparian); (2) alluvial...
Paleoecology of the Late Pennsylvanian-age Calhoun coal bed and implications for long-term dynamics of wetland ecosystems
Debra A. Willard, T.L. Phillips, Alicia D. Lesnikowska, William A. DiMichele
2007, International Journal of Coal Geology (69) 21-54
Quantitative plant assemblage data from coal balls, miospores, megaspores, and compression floras from the Calhoun coal bed (Missourian) of the Illinois Basin (USA) are used to interpret spatial and temporal changes in plant communities in the paleo-peat swamp. Coal-ball and miospore floras from the Calhoun coal bed are dominated strongly...
Mangrove recruitment after forest disturbance is facilitated by herbaceous species in the Caribbean
K.L. McKee, J.E. Rooth, Ilka C. Feller
2007, Ecological Applications (17) 1678-1693
Plant communities along tropical coastlines are often affected by natural and human disturbances, but little is known about factors influencing recovery. We focused on mangrove forests, which are among the most threatened ecosystems globally, to examine how facilitation by herbaceous vegetation might improve forest restoration after disturbance. We specifically investigated...
Remote sensing and monitoring for the convention on biological diversity
H. Strand, E. A. Fosnight, P. Herkenrath, R. Hoft
H.E. Strand, R. Hoft, J. Strittholt, L. Miles, N. Horning, E. A. Fosnight, W. Turner, editor(s)
2007, Book chapter, Sourcebook on remote sensing and biodiversity indicators, CBD Technical Series, 32
No abstract available....
Variation in the establishment of a non-native annual grass influences competitive interactions with Mojave Desert perennials
L.A. DeFalco, G.C.J. Fernandez, R.S. Nowak
2007, Biological Invasions (9) 293-307
Competition between native and non-native species can change the composition and structure of plant communities, but in deserts, the highly variable timing of resource availability also influences non-native plant establishment, thus modulating their impacts on native species. In a field experiment, we varied densities of the non-native annual grass Bromus...
Assessing urban growth with subpixel impervious surface coverage
G. Xian
Q. Weng, D.A. Quattrochi, editor(s)
2007, Book chapter, Urban remote sensing
No abstract available....
Winter movement dynamics of black brant
Mark S. Lindberg, David H. Ward, T. Lee Tibbitts, John Roser
2007, Journal of Wildlife Management (71) 534-540
Although North American geese are managed based on their breeding distributions, the dynamics of those breeding populations may be affected by events that occur during the winter. Birth rates of capital breeding geese may be influenced by wintering conditions, mortality may be influenced by timing of migration and wintering distribution,...
Field-based evaluations of sampling techniques to support long-term monitoring of riparian ecosystems along wadeable streams on the Colorado Plateau
Michael L. Scott, Elizabeth W. Reynolds
2007, Open-File Report 2007-1266
To better plan for and implement long-term ecological monitoring, we measured riparian vegetation and fluvial geomorphic features at pilot study sites on four wadeable perennial stream reaches, representative of drainages across the Colorado Plateau. Our primary objectives were to (1) collect field data, (2) evaluate the efficiency and effectiveness of...
Movements of large snakes (Drymarchon, Masticophis) in north-central Florida
C.K. Dodd Jr., W.J. Barichivich
2007, Florida Scientist (70) 83-94
Abstract not supplied at this time...
Protozoal meningoencephalitis in sea otters (Enhydra lutris): A histopathological and immunohistochemical study of naturally occurring cases
N. J. Thomas, J. P. Dubey, D. S. Lindsay, Rebecca A. Cole, C.U. Meteyer
2007, Journal of Comparative Pathology (137) 102-121
Protozoal meningoencephalitis is considered to be an important cause of mortality in the California sea otter (Enhydra lutris). Thirty nine of 344 (11.3%) California (CA) and Washington state (WA) sea otters examined from 1985 to 2004 had histopathological evidence of significant protozoal meningoencephalitis. The aetiological agents and histopathological changes associated...
The National Elevation Dataset
D.B. Gesch
D. Maune, editor(s)
2007, Book chapter, Digital elevation model technologies and applications—the DEM users manual
No abstract available....
Widespread natural perchlorate in unsaturated zones of the southwest United States
Balaji Rao, Todd A. Anderson, Greta J. Orris, Ken A. Rainwater, Srinath Rajagopalan, Renee M. Sandvig, Bridget R. Scanlon, David A. Stonestrom, Michelle Ann Walvoord, W Andrew Jackson
2007, Environmental Science & Technology (41) 4522-4528
A substantial reservoir (up to 1 kg ha-1) of natural perchlorate is present in diverse unsaturated zones of the arid and semi-arid southwestern United States. The perchlorate co-occurs with meteoric chloride that has accumulated in these soils throughout the Holocene [0...
Evidence for montmorillonite or its compositional equivalent in Columbia Hills, Mars
B. C. Clark III, R. E. Arvidson, Ralf Gellert, R.V. Morris, D. W. Ming, L. Richter, S. W. Ruff, J.R. Michalski, W. H. Farrand, A. S. Yen, Kenneth E. Herkenhoff, R. Li, S. W. Squyres, C. Schroder, G. Klingelhofer, J.F. Bell III
2007, Journal of Geophysical Research E: Planets (112)
During its exploration of the Columbia Hills, the Mars Exploration Rover "Spirit" encountered several similar samples that are distinctly different from Martian meteorites and known Gusev crater soils, rocks, and sediments. Occurring in a variety of contexts and locations, these "Independence class" samples are rough-textured, iron-poor (equivalent FeO ??? 4...
