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Page 1654, results 41326 - 41350

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Not all publications have extents, not all extents are completely accurate
GONe: Software for estimating effective population size in species with generational overlap
J.A. Coombs, B.H. Letcher, K.H. Nislow
2012, Molecular Ecology Resources (12) 160-163
GONe is a user‐friendly, Windows‐based program for estimating effective size (Ne) in populations with overlapping generations. It uses the Jorde–Ryman modification to the temporal method to account for age structure in populations. This method requires estimates of age‐specific survival and birth rate and allele frequencies measured in...
Cambrian-lower Middle Ordovician passive carbonate margin, southern Appalachians
J. Fred Read, John E. Repetski
2012, Book chapter, The great American carbonate bank: The geology and economic resources of the Cambrian-Ordovician Sauk megasequence of Laurentia
The southern Appalachian part of the Cambrian–Ordovician passive margin succession of the great American carbonate bank extends from the Lower Cambrian to the lower Middle Ordovician, is as much as 3.5 km (2.2 mi) thick, and has long-term subsidence rates exceeding 5 cm (2 in.)/k.y. Subsiding depocenters separated by arches...
Concentration, distribution, and translocation of mercury and methylmercury in mine-waste, sediment, soil, water, and fish collected near the Abbadia San Salvatore mercury mine, Monte Amiata district, Italy
V. Rimondi, J. E. Gray, P. Costagliola, O. Vaselli, P. Lattanzi
2012, Science of the Total Environment (414) 318-327
The distribution and translocation of mercury (Hg) was studied in the Paglia River ecosystem, located downstream from the inactive Abbadia San Salvatore mine (ASSM). The ASSM is part of the Monte Amiata Hg district, Southern Tuscany, Italy, which was one of the world’s largest Hg districts. Concentrations of Hg and...
Fate and transport of glyphosate and aminomethylphosphonic acid in surface waters of agricultural basins
Richard H. Coupe, Stephen J. Kalkhoff, Paul D. Capel, Caroline Gregoire
2012, Pest Management Science (68) 16-30
BACKGROUND: Glyphosate [N-(phosphonomethyl)glycine] is a herbicide used widely throughout the world in the production of many crops and is heavily used on soybeans, corn and cotton. Glyphosate is used in almost all agricultural areas of the United States, and the agricultural use of glyphosate has increased from less than 10...
An investigation of element ratios for assessing suspended-sediment sources in small agricultural basins
K. Juracek
2012, Physical Geography (33) 50-67
Various sediment properties previously have been investigated for the purpose of determining sources of suspended sediment. A remaining research need is an assessment of element ratios for the determination of suspended-sediment sources in different terrestrial environments. In this study, 253 element ratios were assessed to determine which, if any, were...
Lidar metadata
H. Karl Heidemann
Michael S. Renslow, editor(s)
2012, Book chapter, Manual of airborne topographic lidar
No abstract available....
Geochemical constraints on adakites of different origins and copper mineralization
W.-D. Sun, M.-X. Ling, S.-L. Chung, X. Ding, X.-Y. Yang, H.-Y. Liang, W.-M. Fan, R. Goldfarb, Q.-Z. Yin
2012, Journal of Geology (120) 105-120
The petrogenesis of adakites holds important clues to the formation of the continental crust and copper ± gold porphyry mineralization. However, it remains highly debated as to whether adakites form by slab melting, by partial melting of the lower continental crust, or by fractional crystallization of normal arc magmas. Here,...
Sirenian pathology and mortality assessment
Robert K. Bonde, Antonio A. Mignucci-Ginannoni, Gregory D. Bossart
Ellen Marie Hines, John Elliot Reynolds, Lemnuel V. Aragones V., Antonio A. Mignucci-Ginannoni, Miriam Marmontel, editor(s)
2012, Book chapter, Sirenian conservation issues and strategies in developing countries
Lake sturgeon population attributes and reproductive structure in the Namakan Reservoir, Minnesota and Ontario
S. L. Shaw, Steven R. Chipps, Steve K. Windels, M.A.H. Webb, D. T. McLeod, D.W. Willis
2012, Journal of Applied Ichthyology (28) 168-175
Quantified were the age, growth, mortality and reproductive structure of lake sturgeon (Acipenser fulvescens) collected in the US and Canadian waters of the Namakan Reservoir. The hypotheses were tested that (i) age and growth of lake sturgeon in the Namakan Reservoir would differ by sex and reproductive stage of maturity,...
Humic acid facilitates the transport of ARS-labeled hydroxyapatite nanoparticles in iron oxyhydroxide-coated sand
Dengjun Wang, Scott A. Bradford, Ronald W. Harvey, Bin Gao, Long Cang, Dongmei Zhou
2012, Environmental Science & Technology (46) 2738-2745
Hydroxyapatite nanoparticles (nHAP) have been widely used to remediate soil and wastewater contaminated with metals and radionuclides. However, our understanding of nHAP transport and fate is limited in natural environments that exhibit significant variability in solid and solution chemistry. The transport and retention kinetics of Alizarin red S (ARS)-labeled nHAP...
Multifractal model of magnetic susceptibility distributions in some igneous rocks
Mark E. Gettings
2012, Nonlinear Processes in Geophysics (19) 635-642
Measurements of in-situ magnetic susceptibility were compiled from mainly Precambrian crystalline basement rocks beneath the Colorado Plateau and ranges in Arizona, Colorado, and New Mexico. The susceptibility meter used measures about 30 cm3 of rock and measures variations in the modal distribution of magnetic minerals that form a minor component...
Fluvial transport and surface enrichment of arsenic in semi-arid mining regions: examples from the Mojave Desert, California
Christopher S. Kim, David H. Slack, James J. Rytuba
2012, Journal of Environmental Monitoring (14) 1798-1813
As a result of extensive gold and silver mining in the Mojave Desert, southern California, mine wastes and tailings containing highly elevated arsenic (As) concentrations remain exposed at a number of former mining sites. Decades of weathering and erosion have contributed to the mobilization of As-enriched tailings, which now contaminate...
Origin of an unusual monazite-xenotime gneiss, Hudson Highlands, New York: SHRIMP U-Pb geochronology and trace element geochemistry
John N. Aleinikoff, Richard I. Grauch, Frank K. Mazdab, Loretta Kwak, C. Mark Fanning, Sandra L. Kamo
2012, American Journal of Science (312) 723-765
A pod of monazite-xenotime gneiss (MXG) occurs within Mesoproterozoic paragneiss, Hudson Highlands, New York. This outcrop also contains granite of the Crystal Lake pluton, which migmatized the paragneiss. Previously, monazite, xenotime, and zircon from MXG, plus detrital zircon from the paragneiss, and igneous zircon from the granite, were dated...
Bird productivity and nest predation in agricultural grasslands
Christine Ribic, Michael J. Guzy, Travis J. Anderson, David W. Sample, Jamie L. Nack
2012, Studies in Avian Biology (43) 119-134
Effective conservation strategies for grassland birds in agricultural landscapes require understanding how nesting success varies among different grassland habitats. A key component to this is identifying nest predators and how these predators vary by habitat. We quantified nesting activity of obligate grassland birds in three habitats [remnant prairie, cool-season grass...
Use of occupancy models to evaluate expert knowledge-based species-habitat relationships
Monica N. Iglecia, Jaime A. Collazo, Alexa McKerrow
2012, Avian Conservation and Ecology (7) 1-13
Expert knowledge-based species-habitat relationships are used extensively to guide conservation planning, particularly when data are scarce. Purported relationships describe the initial state of knowledge, but are rarely tested. We assessed support in the data for suitability rankings of vegetation types based on expert knowledge for three terrestrial avian species in...
Mauritania – A greenfields exploration opportunity in northwestern Africa
Cliff D. Taylor, E. D. Anderson, D. C. Bradley, G. Beaudoin, Michael A. Cosca, Robert G. Eppinger, Gregory L. Fernette, Carol A. Finn, Michael J. Friedel, Stuart A. Giles, Richard J. Goldfarb, John D. Horton, Gregory K. Lee, Erin E. Marsh, Jeffrey L. Mauk, Holly A. Motts, M. Y. Ould El Joud, S. Ould Soueidatt, A. Ould Taleb Mohamed, Barnaby W. Rockwell
2012, Society of Economic Geologists Newsletter (91) 14-18
No abstract available....
Upper Klamath Basin Landsat Image for July 12, 2004: Path 44 Row 31
Daniel T. Snyder
2012, Report
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Upper Klamath Basin Landsat Image for May 6, 2006: Path 45 Rows 30 and 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents
Duane Chapman, Q. Chen, Chenghui Wang, Jinlian Zhao, Guoqing Lu, Jeney Zsigmond, Si-Fa Li
2012, Genetica (140) 115-123
Grass carp (Ctenopharyngodon idella), a freshwater species native to China, has been introduced to about 100 countries/regions and poses both biological and environmental challenges to the receiving ecosystems. In this study, we analyzed genetic variation in grass carp from three introduced river systems (Mississippi River Basin in US,...
Upper Klamath Basin Landsat Image for July 18, 2006: Path 44 Row 31
Daniel T. Snyder
2012, Report
This subset of a Landsat-5 image shows part of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Upper Klamath Basin Landsat Image for August 4, 2004: Path 45 Rows 30 and 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...
Upper Klamath Basin Landsat Image for August 19, 2006: Path 44 Row 31
Daniel T. Snyder
2012, Report
This image is a mosaic of Landsat-5 images of the upper Klamath Basin. The original images were obtained from the U.S. Geological Survey Earth Resources Observation and Science Center (EROS). EROS is responsible for archive management and distribution of Landsat data products. The Landsat-5 satellite is part of an ongoing...