A late-Middle Pleistocene (Marine Isotope Stage 6) vegetated surface buried by Old Crow tephra at the Palisades, interior Alaska
A.V. Reyes, B.J.L. Jensen, G.D. Zazula, T. A. Ager, S. Kuzmina, Farge C. La, D.G. Froese
2010, Quaternary Science Reviews (29) 801-811
A 40??cm thick primary bed of Old Crow tephra (131??????11??ka), an important stratigraphic marker in eastern Beringia, directly overlies a vegetated surface at Palisades West, on the Yukon River in central Alaska. Analyses of insect, bryophyte, and vascular plant macrofossils from the buried surface and underlying organic-rich silt suggest the...
Structural analysis of three extensional detachment faults with data from the 2000 Space-Shuttle Radar Topography Mission
J.E. Spencer
2010, GSA Today (20) 4-10
The Space-Shuttle Radar Topography Mission provided geologists with a detailed digital elevation model of most of Earth's land surface. This new database is used here for structural analysis of grooved surfaces interpreted to be the exhumed footwalls of three active or recently active extensional detachment faults. Exhumed fault footwalls, each...
Characterization of pyroclastic deposits and pre-eruptive soils following the 2008 eruption of Kasatochi Island Volcano, Alaska
B. Wang, G. Michaelson, C.-L. Ping, G. Plumlee, P. Hageman
2010, Arctic, Antarctic, and Alpine Research (42) 276-284
The 78 August 2008 eruption of Kasatochi Island volcano blanketed the island in newly generated pyroclastic deposits and deposited ash into the ocean and onto nearby islands. Concentrations of water soluble Fe, Cu, and Zn determined from a 1:20 deionized water leachate of the ash were sufficient to provide short-term...
First record of carpiodes velifer (Highfin Carpsucker) in the Apalachicola River, Florida
S.P. Young, T.B. Grabowski, Patrick C. Ely, J. Jeffery Isely
2010, Southeastern Naturalist (9) 165-170
We document the discovery of Highfin Carpsucker in the Apalachicola River, FL. Three specimens were captured between river kilometer 170-171 on the Apalachicola River in the vicinity of Jim Woodruff Lock and Dam during spring 2007, The specimens were captured within a reach 0.5-1.0 km downstream from the dam and...
Trends and drivers of marine debris on the Atlantic coast of the United States 1997-2007
C. A. Ribic, S.B. Sheavly, D.J. Rugg, Eric S. Erdmann
2010, Marine Pollution Bulletin (60) 1231-1242
For the first time, we documented regional differences in amounts and long-term trends of marine debris along the US Atlantic coast. The Southeast Atlantic had low land-based and general-source debris loads as well as no increases despite a 19% increase in coastal population. The Northeast (8% population increase) also had...
Standards for documenting and monitoring bird reintroduction projects
W.J. Sutherland, D. Armstrong, S.H.M. Butchart, J.M. Earnhardt, J. Ewen, I. Jamieson, C.G. Jones, R. Lee, P. Newbery, J.D. Nichols, K.A. Parker, F. Sarrazin, P.J. Seddon, N. Shah, V. Tatayah
2010, Conservation Letters (3) 229-235
It would be much easier to assess the effectiveness of different reintroduction methods, and so improve the success of reintroductions, if there was greater standardization in documentation of the methods and outcomes. We suggest a series of standards for documenting and monitoring the methods and outcomes associated with reintroduction projects...
Seismic hazard mapping of California considering site effects
E. Kalkan, C.J. Wills, D.M. Branum
2010, Earthquake Spectra (26) 1039-1055
In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire...
Snowmelt hydrograph interpretation: Revealing watershed scale hydrologic characteristics of the Yellowstone volcanic plateau
Gardner W. Payton, D. D. Susong, Solomon D. Kip, H. Heasler
2010, Journal of Hydrology (383) 209-222
Snowmelt hydrograph analysis and groundwater age dates of cool water springs on the Yellowstone volcanic plateau provide evidence of high volumes of groundwater circulation in watersheds comprised of quaternary Yellowstone volcanics. Ratios of maximum to minimum mean daily discharge and average recession indices are calculated for watersheds within and surrounding...
At-sea observations of marine birds and their habitats before and after the 2008 eruption of Kasatochi volcano, Alaska
G.S. Drew, Donald E. Dragoo, M. Renner, John F. Piatt
2010, Arctic, Antarctic, and Alpine Research (42) 325-334
Kasatochi volcano, an island volcano in the Aleutian chain, erupted on 7-8 August 2008. The resulting ash and pyroclastic flows blanketed the island, covering terrestrial habitats. We surveyed the marine environment surrounding Kasatochi Island in June and July of 2009 to document changes in abundance or distribution of nutrients, fish,...
Sexing California gulls using morphometrics and discriminant function analysis
Garth Herring, Joshua T. Ackerman, Collin A. Eagles-Smith, John Y. Takekawa
2010, Waterbirds (33) 79-85
A discriminant function analysis (DFA) model was developed with DNA sex verification so that external morphology could be used to sex 203 adult California Gulls (Larus californicus) in San Francisco Bay (SFB). The best model was 97% accurate and included head-to-bill length, culmen depth at the gonys, and wing length....
Reptilian prey of the sonora mud turtle (Kinosternon sonoriense) with comments on saurophagy and ophiophagy in North American Turtles
J. Lovich, C. Drost, A.J. Monatesti, D. Casper, D.A. Wood, M. Girard
2010, Southwestern Naturalist (55) 135-138
We detected evidence of predation by the Sonora mud turtle (Kinosternon sonoriense) on the Arizona alligator lizard (Elgaria kingii nobilis) and the ground snake (Sonora semiannulata) at Montezuma Well, Yavapai County, Arizona. Lizards have not been reported in the diet of K. sonoriense, and saurophagy is rare in turtles of...
Diurnal variation in invertebrate catch rates by sticky traps: Potential for biased indices of piping plover forage
M.J. Anteau, M. H. Sherfy
2010, Wetlands (30) 757-762
Measuring abundance of invertebrate forage for piping plovers (Charadrius melodus; hereafter plovers), a federally listed species in the USA, is an important component of research and monitoring targeted toward species recovery. Sticky traps are commonly used to passively sample invertebrates, but catch rates may vary diurnally or in response to...
The influence of maximum magnitude on seismic-hazard estimates in the Central and Eastern United States
C.S. Mueller
2010, Bulletin of the Seismological Society of America (100) 699-711
I analyze the sensitivity of seismic-hazard estimates in the central and eastern United States (CEUS) to maximum magnitude (mmax) by exercising the U.S. Geological Survey (USGS) probabilistic hazard model with several mmax alternatives. Seismicity-based sources control the hazard in most of the CEUS, but data seldom provide an objective basis...
Depletion of florfenicol amine, marker residue of florfenicol, from the edible fillet of tilapia (Oreochromis niloticus x O. niloticus and O. niloticus x O. aureus) following florfenicol administration in feed
M.P. Gaikowski, M. Mushtaq, P. Cassidy, J.R. Meinertz, S.M. Schleis, D. Sweeney, R.G. Endris
2010, Aquaculture (301) 1-6
Aquaflor??, a 50% feed premix containing the broad spectrum antibacterial agent florfenicol is available globally to control mortality associated with economically significant systemic bacterial diseases of fish. Florfenicol (FFC) is effective in controlling mortality associated with Streptococcus iniae in tilapia Oreochromis sp. when administered in medicated feed at a dose...
The effect of channelization on floodplain sediment deposition and subsidence along the Pocomoke River, Maryland
D.E. Kroes, C.R. Hupp
2010, Journal of the American Water Resources Association (46) 686-699
The nontidal Pocomoke River was intensively ditched and channelized by the mid-1900s. In response to channelization; channel incision, head-cut erosion, and spoil bank perforation have occurred in this previously nonalluvial system. Six sites were selected for study of floodplain sediment dynamics in relation to channel condition. Short- and long-term sediment...
Protein expression and genetic structure of the coral Porites lobata in an environmentally extreme Samoan back reef: Does host genotype limit phenotypic plasticity?
D.J. Barshis, J.H. Stillman, R.D. Gates, R.J. Toonen, L.W. Smith, C. Birkeland
2010, Molecular Ecology (19) 1705-1720
The degree to which coral reef ecosystems will be impacted by global climate change depends on regional and local differences in corals' susceptibility and resilience to environmental stressors. Here, we present data from a reciprocal transplant experiment using the common reef building coral Porites lobata between a highly fluctuating back...
Detrital zircon provenance from three turbidite depocenters of the Middle-Upper Triassic Songpan-Ganzi complex, central China: Record of collisional tectonics, erosional exhumation, and sediment production
A.L. Weislogel, S.A. Graham, E. Z. Chang, J. L. Wooden, G. E. Gehrels
2010, Geological Society of America Bulletin (122) 2041-2062
To test the idea that the voluminous upper Middle to Upper Triassic turbidite strata in the Songpan-Ganzi complex of central China archive a detrital record of Dabie ultrahigh-pressure (UHP) terrane unroofing, we report 2080 single detrital U-Pb zircon ages by sensitive high-resolution ion microprobe-reverse geometry (SHRIMP-RG) and laser ablation-inductively coupled...
Silica in a Mars analog environment: Ka u Desert, Kilauea Volcano, Hawaii
K.D. Seelos, R. E. Arvidson, B.L. Jolliff, S.M. Chemtob, R.V. Morris, D. W. Ming, G.A. Swayze
2010, Journal of Geophysical Research E: Planets (115)
Airborne Visible/Near-Infrared Imaging Spectrometer (AVIRIS) data acquired over the Ka u Desert are atmospherically corrected to ground reflectance and used to identify the mineralogic components of relatively young basaltic materials, including 250-700 and 200-400 year old lava flows, 1971 and 1974 flows, ash deposits, and solfatara incrustations. To provide context,...
Physiological, molecular, and cellular mechanisms of impaired seawater tolerance following exposure of Atlantic salmon, Salmo salar, smolts to acid and aluminum
M.Y. Monette, T. Yada, V. Matey, S. D. McCormick
2010, Aquatic Toxicology (99) 17-32
We examined the physiological, molecular, and cellular mechanisms of impaired ion regulation in Atlantic salmon, Salmo salar, smolts following acute acid and aluminum (Al) exposure. Smolts were exposed to: control (pH 6.5, 3.4??gl-1 Al), acid and low Al (LAl: pH 5.4, 11??gl-1 Al), acid and moderate Al (MAl: pH 5.3,...
Active remote sensing of snow using NMM3D/DMRT and comparison with CLPX II airborne data
X. Xu, D. Liang, L. Tsang, K.M. Andreadis, E.G. Josberger, D.P. Lettenmaier, D.W. Cline, S.H. Yueh
2010, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (3) 689-697
We applied the Numerical Maxwell Model of three-dimensional simulations (NMM3D) in the Dense Media Radiative Theory (DMRT) to calculate backscattering coefficients. The particles' positions are computer-generated and the subsequent Foldy-Lax equations solved numerically. The phase matrix in NMM3D has significant cross-polarization, particularly when the particles are densely packed. The NMM3D...
The Sudbury impact layer in the paleoproterozoiciron ranges of northern Michigan, USA
W.F. Cannon, K. J. Schulz, J. Wright Horton Jr., David A. King
2010, Geological Society of America Bulletin (122) 50-75
A layer of breccia that contains fragments of impact ejecta has been found at 10 sites in the Paleoproterozoic iron ranges of northern Michigan, in the Lake Superior region of the United States. Radiometric age constraints from events predating and postdating deposition of the breccia are ca. 1875 Ma and...
Measurement and modeling of polychlorinated biphenyl bioaccumulation from sediment for the marine polychaete neanthes arenaceodentata and response to sorbent amendment
E.M.-L. Janssen, Marie Noele Croteau, S. N. Luoma, R.G. Luthy
2010, Environmental Science & Technology (44) 2857-2863
Bioaccumulation rates of polychlorinated biphenyls (PCBs) for the marine polychaete Neanthes arenaceodentata were characterized, including PCB uptake rates from water and sediment, and the effect of sorbent amendment to the sediment on PCB bioavailability, organism growth, and lipid content. Physiological parameters were incorporated into a biodynamic model to predict contaminant...
Linking ecosystems, food webs, and fish production: subsidies in salmonid watersheds
Mark S. Wipfli, Colden V. Baxter
2010, Fisheries (35) 373-387
Physical characteristics of riverine habitats, such as large wood abundance, pool geometry and abundance, riparian vegetation cover, and surface flow conditions, have traditionally been thought to constrain fish production in these ecosystems. Conversely, the role of food resources (quantity and quality) in controlling fish production has received far less attention...
Satellite observations of a surtseyan eruption: Hunga Ha'apai, Tonga
R. Greg Vaughan, Peter W. Webley
2010, Journal of Volcanology and Geothermal Research (198) 177-186
On March 17, 2009, a surtseyan eruption occurred around Hunga Ha'apai Island, Tonga. A series of observations from the high-spatial resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and the high-temporal resolution Moderate Resolution Imaging Spectroradiometer (MODIS), was used to estimate the magnitude, location, start time, and duration of...
First high-resolution stratigraphic column of the Martian north polar layered deposits
K.E. Fishbaugh, C.S. Hvidberg, S. Byrne, P.S. Russell, Kenneth E. Herkenhoff, M. Winstrup, R. Kirk
2010, Geophysical Research Letters (37)
This study achieves the first high-spatial-resolution, layer-scale, measured stratigraphic column of the Martian north polar layered deposits using a 1m-posting DEM. The marker beds found throughout the upper North Polar Layered Deposits range in thickness from 1.6 m-16.0 m +/-1.4 m, and 6 of 13 marker beds are separated by...
