Rift Valley fever virus infection in African Buffalo (Syncerus caffer) herds in rural South Africa: Evidence of interepidemic transmission
A.D. LaBeaud, P.C. Cross, W.M. Getz, A. Glinka, C.H. King
2011, American Journal of Tropical Medicine and Hygiene (84) 641-646
Rift Valley fever virus (RVFV) is an emerging biodefense pathogen that poses significant threats to human and livestock health. To date, the interepidemic reservoirs of RVFV are not well defined. In a longitudinal survey of infectious diseases among African buffalo during 2000-2006, 550 buffalo were tested for antibodies against RVFV...
Evidence for predatory control of the invasive round goby
C.P. Madenjian, M.A. Stapanian, L.D. Witzel, D.W. Einhouse, S.A. Pothoven, H.L. Whitford
2011, Biological Invasions (13) 987-1002
We coupled bioenergetics modeling with bottom trawl survey results to evaluate the capacity of piscivorous fish in eastern Lake Erie to exert predatory control of the invading population of round goby Neogobius melanostomus. In the offshore (>20 m deep) waters of eastern Lake Erie, burbot Lota lota is a native...
Analysis of passive surface-wave noise in surface microseismic data and its implications
F. Forghani-Arani, M. Willis, S. Haines, M. Batzle, M. Davidson
2011, SEG Technical Program Expanded Abstracts (30) 1493-1498
Tight gas reservoirs are projected to be a major portion of future energy resources. Because of their low permeability, hydraulic fracturing of these reservoirs is required to improve the permeability and reservoir productivity. Passive seismic monitoring is one of the few tools that can be used to characterize the changes...
Organic geochemical investigation and coal-bed methane characteristics of the Guasare coals (Paso Diablo mine, western Venezuela)
K. Quintero, M. Martinez, P. Hackley, G. Marquez, G. Garban, I. Esteves, M. Escobar
2011, Energy Sources, Part A: Recovery, Utilization and Environmental Effects (33) 959-971
The aim of this work was to carry out a geochemical study of channel samples collected from six coal beds in the Marcelina Formation (Zulia State, western Venezuela) and to determine experimentally the gas content of the coals from the Paso Diablo mine. Organic geochemical analyses by gas chromatography-mass spectrometry...
Comparison of phenolic compounds and the effects of invasive and native species in East Asia: Support for the novel weapons hypothesis
Y.-O. Kim, E.J. Lee
2011, Ecological Research (26) 87-94
One prediction of the novel weapons hypothesis (NWH) for the dominance of exotic invasive plant species is that the allelopathic effects of successful invaders will, in general, be more biochemically inhibitory to native species and microbes in invaded regions than the native plants themselves. However, no study has compared biochemical...
What do we know about metal recycling rates?
T.E. Graedel, J. Allwood, J.-P. Birat, M. Buchert, C. Hageluken, B.K. Reck, S.F. Sibley, G. Sonnemann
2011, Journal of Industrial Ecology (15) 355-366
The recycling of metals is widely viewed as a fruitful sustainability strategy, but little information is available on the degree to which recycling is actually taking place. This article provides an overview on the current knowledge of recycling rates for 60 metals. We propose various recycling metrics, discuss relevant aspects...
A comparison of recharge rates in aquifers of the United States based on groundwater-age data
P.B. McMahon, Niel Plummer, J.K. Böhlke, S.D. Shapiro, S.R. Hinkle
2011, Hydrogeology Journal (19) 779-800
An overview is presented of existing groundwater-age data and their implications for assessing rates and timescales of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions in aquifers determined from chlorofluorocarbon, sulfur hexafluoride, tritium/helium-3, and radiocarbon measurements from 565 wells in 45 networks were used to...
Toward a consistent model for strain accrual and release for the New Madrid Seismic Zone, central United States
S. E. Hough, M. Page
2011, Journal of Geophysical Research B: Solid Earth (116)
At the heart of the conundrum of seismogenesis in the New Madrid Seismic Zone is the apparently substantial discrepancy between low strain rate and high recent seismic moment release. In this study we revisit the magnitudes of the four principal 1811–1812 earthquakes using intensity values determined from individual assessments from...
Terrestrial sensitivity to abrupt cooling recorded by aeolian activity in northwest Ohio, USA
M.C. Campbell, T.G. Fisher, R.J. Goble
2011, Quaternary Research (75) 411-416
Optically stimulated luminescence dated sand dunes and Pleistocene beach ridges in northwest Ohio are used to reconstruct landscape modification more than 5000. yr after deglaciation. Four of the OSL ages (13.3-11.1. ka) cluster around the Younger Dryas cold event, five ages (10.8-8.2. ka) cluster around the Preboreal, one young age...
Ground deformation monitoring using small baseline DInSAR technique: A case study in Taiyuan City from 2003 to 2009
H.-A. Wu, Y.-H. Zhang, X.-Y. Chen, T. Lu, J. Du, Z.-H. Sun, G.-T. Sun
2011, Chinese Journal of Geophysics (Acta Geophysica Sinica) (54) 673-680
DInSAR technique based on time series of SAR images has been very popular to monitor ground stow deformation in recent years such as permanent scatterers (PS) method small baseline subsets (SBAS) method and coherent targets (CT) method. By taking advantage of PS method and CT method in this paper small...
Islands at bay: Rising seas, eroding islands, and waterbird habitat loss in Chesapeake Bay (USA)
R. Michael Erwin, D.F. Brinker, B.D. Watts, G.R. Costanzo, D.D. Morton
2011, Journal of Coastal Conservation (15) 51-60
Like many resources in the Chesapeake Bay region of the U.S., many waterbird nesting populations have suffered over the past three to four decades. In this study, historic information for the entire Bay and recent results from the Tangier Sound region were evaluated to illustrate patterns of island erosion and...
Estimation of suspended-sediment concentration from total suspended solids and turbidity data for Kentucky, 1978-1995
Tanja N. Williamson, Charles G. Crawford
2011, Journal of the American Water Resources Association (47) 739-749
Suspended sediment is a constituent of water quality that is monitored because of concerns about accelerated erosion, nonpoint contamination of water resources, and degradation of aquatic environments. In order to quantify the relationship among different sediment parameters for Kentucky streams, long‐term records were obtained from the National Water Information System...
Apogean-perigean signals encoded in tidal flats at the fluvio-estuarine transition of Glacier Creek, Turnagain Arm, Alaska; implications for ancient tidal rhythmites
S.F. Greb, A.W. Archer, D.G. Deboer
2011, Sedimentology (58) 1434-1452
Turnagain Arm is a macrotidal fjord‐style estuary. Glacier Creek is a small, glacially fed stream which enters the estuary tangentially near Girdwood, Alaska. Trenches and daily sedimentation measurements were made in a mudflat along the fluvio–estuarine transition of Glacier Creek during several summers since 2003. Each year, the flats appear...
Near-surface shear-wave velocity measurements in unlithified sediment
B.T. Richards, D. Steeples, R. Miller, J. Ivanov, S. Peterie, S.D. Sloan, J.R. McKenna
2011, SEG Technical Program Expanded Abstracts (30) 1416-1420
S-wave velocity can be directly correlated to material stiffness and lithology making it a valuable physical property that has found uses in construction, engineering, and environmental projects. This study compares different methods for measuring S-wave velocities, investigating and identifying the differences among the methods' results, and prioritizing the different methods...
Viruses and bacteria in karst and fractured rock aquifers in east Tennessee, USA
T.B. Johnson, L.D. McKay, A.C. Layton, S.W. Jones, G.C. Johnson, J.L. Cashdollar, D.R. Dahling, L.F. Villegas, G.S. Fout, D.E. Williams, G. Sayler
2011, Ground Water (49) 98-110
A survey of enteric viruses and indicator bacteria was carried out in eight community water supply sources (four wells and four springs) in East Tennessee. Seven sites derived their water from carbonate aquifers and one from fractured sandstone. Four of the sites were deemed "low-risk" based on prior monitoring of...
Bird community response to filter strips in Maryland
P.J. Blank, G.P. Dively, D.E. Gill, C.A. Rewa
2011, Journal of Wildlife Management (75) 116-125
Filter strips are strips of herbaceous vegetation planted along agricultural field margins adjacent to streams or wetlands and are designed to intercept sediment, nutrients, and agrichemicals. Roughly 16,000 ha of filter strips have been established in Maryland through the United States Department of Agriculture's Conservation Reserve Enhancement Program. Filter strips...
Comparative phylogeography of a coevolved community: Concerted population expansions in Joshua trees and four yucca moths
Christopher Irwin Smith, Shantel Tank, William Godsoe, Jim Levenick, Eva Strand, Todd C. Esque, Olle Pellmyr
2011, PLoS ONE (6)
Comparative phylogeographic studies have had mixed success in identifying common phylogeographic patterns among co-distributed organisms. Whereas some have found broadly similar patterns across a diverse array of taxa, others have found that the histories of different species are more idiosyncratic than congruent. The variation in the results of comparative phylogeographic...
Effects of dams in river networks on fish assemblages in non-impoundment sections of rivers in Michigan and Wisconsin, USA
L. Wang, D. Infante, J. Lyons, J. Stewart, A. Cooper
2011, River Research and Applications (27) 473-487
Regional assessment of cumulative impacts of dams on riverine fish assemblages provides resource managers essential information for dam operation, potential dam removal, river health assessment and overall ecosystem management. Such an assessment is challenging because characteristics of fish assemblages are not only affected by dams, but also influenced by natural...
Experimental determination of the phase boundary between kornelite and pentahydrated ferric sulfate at 0.1MPa
W.G. Kong, A. Wang, I.-M. Chou
2011, Chemical Geology (284) 333-338
Recent findings of various ferric sulfates on Mars emphasize the importance of understanding the fundamental properties of ferric sulfates at temperatures relevant to that of Martian surface. In this study, the phase boundary between kornelite (Fe2(SO4)3.7H2O) and pentahydrated ferric sulfate (Fe2(SO4)3.5H2O) was experimentally determined using the humidity-buffer technique together with...
Foaling rates in feral horses treated with the immunocontraceptive porcine zona pellucida
J.I. Ransom, J. E. Roelle, B.S. Cade, L. Coates-Markle, A.J. Kane
2011, Wildlife Society Bulletin (35) 343-352
Locally abundant feral horses (Equus caballus) can rapidly deplete available resources. Fertility control agents present promising nonlethal tools for reducing their population growth rates. We tested the effect of 2 forms of the immunocontraceptive porcine zona pellucida (PZP) on foaling rates in 3 populations of feral horses in the western...
Nocturnal aerosol optical depth measurements with a small-aperture automated photometer using the moon as a light source
T.A. Berkoff, M. Sorokin, T. Stone, T.F. Eck, R. Hoff, E. Welton, B. Holben
2011, Journal of Atmospheric and Oceanic Technology (28) 1297-1306
A method is described that enables the use of lunar irradiance to obtain nighttime aerosol optical depth (AOD) measurements using a small-aperture photometer. In this approach, the U.S. Geological Survey lunar calibration system was utilized to provide high-precision lunar exoatmospheric spectral irradiance predictions for a ground-based sensor location, and when...
Temperature, hydric environment, and prior pathogen exposure alter the experimental severity of chytridiomycosis in boreal toads
Peter J. Murphy, Sophie St-Hilaire, Paul Stephen Corn
2011, Diseases of Aquatic Organisms (95) 31-42
Prevalence of the pathogen Batrachochytrium dendrobatidis (Bd), implicated in amphibian population declines worldwide, is associated with habitat moisture and temperature, but few studies have varied these factors and measured the response to infection in amphibian hosts. We evaluated how varying humidity, contact with water, and temperature affected the manifestation of...
Migration delays caused by anthropogenic barriers: Modeling dams, temperature, and success of migrating salmon smolts
E.A. Marschall, M. E. Mather, D.L. Parrish, G.W. Allison, J.R. McMenemy
2011, Ecological Applications (21) 3014-3031
Disruption to migration is a growing problem for conservation and restoration of animal populations. Anthropogenic barriers along migration paths can delay or prolong migrations, which may result in a mismatch with migration-timing adaptations. To understand the interaction of dams (as barriers along a migration path), seasonally changing environmental conditions, timing...
Status and distribution of the Kittlitz's Murrelet Brachyramphus brevirostris along the Alaska Peninsula and Kodiak and Aleutian Islands, Alaska
Erica N. Madison, John F. Piatt, Mayumi L. Arimitsu, Marc D. Romano, Thomas I. van Pelt, S. Kim Nelson, Jeffrey C. Williams, Anthony R. DeGange
2011, Marine Ornithology: Journal of Seabird Research and Conservation (39) 111-122
The Kittlitz's Murrelet Brachyramphus brevirostris is adapted for life in glacial-marine ecosystems, being concentrated in the belt of glaciated fjords in the northern Gulf of Alaska from Glacier Bay to Cook Inlet. Most of the remaining birds are scattered along coasts of the Alaska Peninsula and Aleutian Islands, where they...
Leaders' perspectives in the Yellowstone to Yukon Conservation Initiative
D.J. Mattson, S.G. Clark, K.L. Byrd, S.R. Brown, B. Robinson
2011, Policy Sciences (44) 103-133
The Yellowstone to Yukon Conservation Initiative (Y2Y) was created in 1993 to advance conservation in a 1.2 million km2 portion of the North American Rocky Mountains. We assembled 21 people with influence over Y2Y in a workshop to elucidate perspectives on challenges and solutions for this organization at a key...
