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Page 5, results 101 - 125

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Estimating tag loss of the Atlantic Horseshoe crab, Limulus polyphemus, using a multi-state model
Catherine Alyssa Butler, Conor P. McGowan, J. Barry Grand, David Smith
2012, Conference Paper
The Atlantic Horseshoe crab, Limulus polyphemus, is a valuable resource along the Mid-Atlantic coast which has, in recent years, experienced new management paradigms due to increased concern about this species role in the environment. While current management actions are underway, many acknowledge the need for improved and updated parameter estimates...
Biosolids, crop, and groundwater data for a biosolids-application area near Deer Trail, Colorado, 2009 and 2010
Tracy J.B. Yager, David B. Smith, James G. Crock
2012, Data Series 664
During 2009 and 2010, the U.S. Geological Survey monitored the chemical composition of biosolids, crops, and groundwater related to biosolids applications near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District. This monitoring effort was a continuation of the monitoring program begun in 1999 in cooperation with the...
Experimental and environmental factors affect spurious detection of ecological thresholds
Jonathan P. Daily, Nathaniel P. Hitt, David Smith, Craig D. Snyder
2012, Ecology (93) 17-23
Threshold detection methods are increasingly popular for assessing nonlinear responses to environmental change, but their statistical performance remains poorly understood. We simulated linear change in stream benthic macroinvertebrate communities and evaluated the performance of commonly used threshold detection methods based on model fitting (piecewise quantile regression [PQR]), data partitioning (nonparametric...
Demographic consequences of migratory stopover: Linking red knot survival to horseshoe crab spawning abundance
Conor P. McGowan, James E. Hines, James D. Nichols, James E. Lyons, David Smith, Kevin S. Kalasz, Lawrence J. Niles, Amanda D. Dey, Nigel A. Clark, Philip W. Atkinson, Clive D.T. Minton, William Kendall
2011, Ecosphere (2)
Understanding how events during one period of the annual cycle carry over to affect survival and other fitness components in other periods is essential to understanding migratory bird demography and conservation needs. Previous research has suggested that western Atlantic red knot (Calidris canutus rufa) populations are greatly affected by horseshoe...
Helicopter electromagnetic and magnetic geophysical survey data, Hunton anticline, south-central Oklahoma
Bruce D. Smith, David V. Smith, Maryla Deszcz-Pan, Charles D. Blome, Patricia Hill
2011, Open-File Report 2011-1240
This report is a digital data release for multiple geophysical surveys conducted in the Hunton anticline area of south-central Oklahoma. The helicopter electromagnetic and magnetic surveys were flown on March 16–17, 2007, in four areas of the Hunton anticline in south-central Oklahoma. The objective of this project is to improve...
Pb-concentrations and Pb-isotope ratios in soils collected along an east-west transect across the United States
Clemens Reimann, David B. Smith, Laurel G. Woodruff, Belinda Flem
2011, Applied Geochemistry (26) 1623-1631
Analytical results for Pb-concentrations and isotopic ratios from ca. 150 samples of soil A horizon and ca. 145 samples of soil C horizon collected along a 4000-km east–west transect across the USA are presented. Lead concentrations along the transect show: (1) generally higher values in the soil A-horizon than the...
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2010 Annual Report
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Laura Biewick, Steven W. Blecker, Gregory K. Boughton, R. Sky Bristol, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, Melanie L. Clark, Jay E. Diffendorfer, Bradley C. Fedy, Katharine Foster, Steven L. Garman, Steve Germaine, JoAnn Holloway, Collin G. Homer, Matthew J. Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Christopher J. Potter, Spencer Schell, Sarah L. Shafer, David B. Smith, Lisa L. Stillings, Michele L. Tuttle, Anna B. Wilson
2011, Open-File Report 2011-1219
This is the third report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual work activities. The first report described activities for 2007 and 2008, and the second report covered work activities for FY09. This third report covers work activities conducted in...
Multispecies modeling for adaptive management of horseshoe crabs and red knots in the Delaware Bay
Conor P. McGowan, David R. Smith, J. A. Sweka, Julien Martin, James D. Nichols, R. Wong, J. E. Lyons, L. J. Niles, K. Kalasz, J. Brust, M. Klopfer, B. Spear
2011, Natural Resource Modeling (24) 117-156
Adaptive management requires that predictive models be explicit and transparent to improve decisions by comparing management actions, directing further research and monitoring, and facilitating learning. The rufa subspecies of red knots (Calidris canutus rufa), which has recently exhibited steep population declines, relies on horseshoe crab (Limulus polyphemus) eggs as their...
Biosolids, crop, and groundwater data for a biosolids-application area near Deer Trail, Colorado, 2007 and 2008
Tracy J.B. Yager, David B. Smith, James G. Crock
2011, Data Series 589
During 2007 and 2008, the U.S. Geological Survey monitored the chemical composition of biosolids, crops, and groundwater related to biosolids applications near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District. This monitoring effort was a continuation of the monitoring program begun in 1999 in cooperation with the...
A national-scale geochemical and mineralogical survey of soils of the conterminous United States
David B. Smith, William F. Cannon, Laurel G. Woodruff
2011, Applied Geochemistry (26) S250-S255
In 2007, the US Geological Survey initiated a low-density (1 site per 1600 km2, c. 4800 sites) geochemical and mineralogical survey of soils of the conterminous USA. The ideal sampling protocol at each site includes a sample from 0–5 cm depth, a composite of the soil A horizon, and a sample from...
Non-native fish control below Glen Canyon Dam - Report from a structured decision-making project
Michael C. Runge, Ellen Bean, David Smith, Sonja Kokos
2011, Open-File Report 2011-1012
This report describes the results of a structured decision-making project by the U.S. Geological Survey to provide substantive input to the Bureau of Reclamation (Reclamation) for use in the preparation of an Environmental Assessment concerning control of non-native fish below Glen Canyon Dam. A forum was created to allow the...
New information on the braincase of the North American therizinosaurian (Theropoda, Maniraptora) Falcarius utahensis
David Smith, Lindsay E. Zanno, R. Kent Sanders, Donald D. Deblieux, James I. Kirkland
2011, Journal of Vertebrate Paleontology (31) 387-404
Many disarticulated bones from multiple individuals of a primitive therizinosaurian, referred to Falcarius utahensis, were found in the paucispecific Crystal Geyser bonebed in the Lower Cretaceous Cedar Mountain Formation of eastern Utah. To date, more than 2000 specimens from this species have been excavated. Included in this collection are two partial...
Microbial survival in the stratosphere and implications for global dispersal
David J. Smith, Dale W. Griffin, Richard D. McPeters, Peter D. Ward, Andrew C. Schuerger
2011, Aerobiologia (27) 319-332
Spores of Bacillus subtilis were exposed to a series of stratosphere simulations. In total, five distinct treatments measured the effect of reduced pressure, low temperature, high desiccation, and intense ultraviolet (UV) irradiation on stratosphereisolated and ground-isolated B. subtilis strains. Environmental conditions were based on springtime data from a mid-latitude region...
Recovery and reprocessing of legacy geophysical data from the archives of the State Company of Geology and Mining (GEOSURV) of Iraq and Iraq Petroleum Company (IPC)
David V. Smith, Benjamin J. Drenth, J.D. Fairhead, K. Lei, J.A. Dark, K. Al-Bassam
2011, SEG Technical Program Expanded Abstracts (30) 856-860
Aeromagnetic data belonging to the State Company of Geology and Mining of Iraq (GEOSURV) have been recovered from magnetic tapes and early paper maps. In 1974 a national airborne survey was flown by the French firm Compagnie General de Geophysique (CGG). Following the survey the magnetic data were stored on...
Stratospheric microbiology at 20 km over the Pacific Ocean
David J. Smith, Dale W. Griffin, Andrew C. Schuerger
2010, Aerobiologia (26) 35-46
An aerobiology sampling flight at 20 km was conducted on 28 April 2008 over the Pacific Ocean (36.5° N, 118–149° W), a period of time that coincided with the movement of Asian dust across the ocean. The aim of this study was to confirm the presence of viable bacteria and...
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2009 Annual Report
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Laura R. H. Biewick, Steven W. Blecker, R. Sky Bristol, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, James E. Diffendorfer, Bradley C. Fedy, Steven L. Garman, Stephen S. Germaine, Richard I. Grauch, JoAnn M. Holloway, Collin G. Homer, Matthew Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Constance J. Nutt, Christopher J. Potter, Hall Sawyer, Spencer Schell, Sarah L. Shafer, David B. Smith, Lisa L. Stillings, Michele L. Tuttle, Anna B. Wilson
2010, Open-File Report 2010-1231
This is the second report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual work activities. The first report described work activities for 2007 and 2008; this report covers work activities conducted in 2009. Important differences between the two reports are that...
Age and sex specific timing, frequency, and spatial distribution of horseshoe crab spawning in Delaware Bay: Insights from a large-scale radio telemetry array
David R. Smith, L. J. Brousseau, Mary T. Mandt, Michael J. Millard
2010, Current Zoology (56) 563-574
To study horseshoe crab Limulus polyphemus spawning behavior and migration over a large-spatial extent (>100 km), we arrayed fixed station radio receivers throughout Delaware Bay and deployed radio transmitters and archival tags on adult horseshoe crabs prior to their spawning season. We tagged and released 160 females and 60 males in 2004...
Geochemical data for Colorado soils: Results from the 2006 state-scale geochemical survey
David B. Smith, Karl J. Ellefsen, James E. Kilburn
2010, Data Series 520
In 2006, soil samples were collected at 960 sites (1 site per 280 square kilometers) throughout the state of Colorado. These samples were collected from a depth of 0-15 centimeters and, following a near-total multi-acid digestion, were analyzed for a suite of more than 40 major and trace elements. The...
Structured decision-making and rapid prototyping to plan a management response to an invasive species
S. M. Blomquist, Trisha D. Johnson, David R. Smith, Geoff P. Call, Brant N. Miller, W. Mark Thurman, Jamie E. McFadden, Mary J. Parkin, G. Scott Bloomer
2010, Journal of Fish and Wildlife Management (1) 19-32
We developed components of a decision structure that could be used in an adaptive management framework for responding to invasion of hemlock woolly adelgid Adeleges tsugae on the Cumberland Plateau of northern Tennessee. Hemlock woolly adelgid, an invasive forest pest, was first detected in this area in 2007. We used a structured...
Soil Geochemical Data for the Wyoming Landscape Conservation Initiative Study Area
David B. Smith, Karl J. Ellefsen
2010, Data Series 510
In 2008, soil samples were collected at 139 sites throughout the Wyoming Landscape Conservation Initiative study area in southwest Wyoming. These samples, representing a density of 1 site per 440 square kilometers, were collected from a depth of 0-5 cm and analyzed for a suite of more than 40 major...
Efficient estimators for adaptive stratified sequential sampling
M. Salehi, M. Moradi, Jennifer Brown, David R. Smith
2010, Journal of Statistical Computation and Simulation (80) 1163-1179
In stratified sampling, methods for the allocation of effort among strata usually rely on some measure of within-stratum variance. If we do not have enough information about these variances, adaptive allocation can be used. In adaptive allocation designs, surveys are conducted in two phases. Information from the first phase is...
Preliminary results of the North American Soil Geochemical Landscapes Project, northeast United States and Maritime Provinces of Canada
Eric C. Grunsky, David B. Smith, Peter W.B. Friske, Laurel G. Woodruff
2009, Conference Paper, 24th International Applied Geochemistry Symposium
The results of a soil geochemical survey of the Canadian Maritime provinces and the northeast states of the United States are described. The data presented are for the <2-mm fraction of the surface layer (0-5 cm depth) and C horizons of the soil. Elemental determinations were made by ICP-MS following...
An incomplete analysis
David Smith, Eric M. Hallerman, Michael J. Millard, John A. Sweka, Richard G. Weber
2009, BioScience (59) 541-541
Niles and colleagues (2009) do not present all of the data relevant to the issues they address in the article they wrote for BioScience. They reference unnamed sources for pre-1997 horseshoe crab harvest to conclude that recent harvest exceeds historic harvest. In fact, reported landings from New Jersey, Delaware, Maryland,...