Decadal-timescale estuarine geomorphic change under future scenarios of climate and sediment supply
N. K. Ganju, D. H. Schoellhamer
2010, Estuaries and Coasts (33) 15-29
Future estuarine geomorphic change, in response to climate change, sea-level rise, and watershed sediment supply, may govern ecological function, navigation, and water quality. We estimated geomorphic changes in Suisun Bay, CA, under four scenarios using a tidal-timescale hydrodynamic/sediment transport model. Computational expense and data needs were reduced using the morphological...
The spatial and temporal variability of groundwater recharge in a forested basin in northern Wisconsin
W. R. Dripps, K. R. Bradbury
2010, Hydrological Processes (24) 383-392
Recharge varies spatially and temporally as it depends on a wide variety of factors (e.g. vegetation, precipitation, climate, topography, geology, and soil type), making it one of the most difficult, complex, and uncertain hydrologic parameters to quantify. Despite its inherent variability, groundwater modellers, planners, and policy makers often ignore recharge...
First Results of the Regional Earthquake Likelihood Models Experiment
D. Schorlemmer, J.D. Zechar, M.J. Werner, E. H. Field, D.D. Jackson, T.H. Jordan
2010, Pure and Applied Geophysics (167) 859-876
The ability to successfully predict the future behavior of a system is a strong indication that the system is well understood. Certainly many details of the earthquake system remain obscure, but several hypotheses related to earthquake occurrence and seismic hazard have been proffered, and predicting earthquake behavior is a worthy...
Rodents and lagomorphs (Mammalia) from the Hemphillian (late Miocene) of Utah
W.W. Korth, D. D. De Blieux
2010, Journal of Vertebrate Paleontology (30) 226-235
Four species of rodents (two heteromyids and two cricetids) and one lagomorph are identified from the late Tertiary Sevier River Formation of Utah. The heteromyids include a new genus and species of heteromyine, Metaliomys sevierensis, which is intermediate in morphology between the Clarendonian and early Hemphillian Diprionomys Kellogg and the...
Piscicides and invertebrates: after 70 years, does anyone really know?
M.R. Vinson, E.C. Dinger, D.K. Vinson
2010, Fisheries (35) 61-71
The piscicides rotenone and antimycin have been used for more than 70 years to manage fish populations by eliminating undesirable fish species. The effects of piscicides on aquatic invertebrate assemblages are considered negligible by some and significant by others. This difference of opinion has created contentious situations and delayed native...
The vegetation outlook (VegOut): a new method for predicting vegetation seasonal greenness
T. Tadesse, B. Wardlow, M. Hayes, M. Svoboda, J. Brown
2010, GIScience and Remote Sensing (47) 25-52
The vegetation outlook (VegOut) is a geospatial tool for predicting general vegetation condition patterns across large areas. VegOut predicts a standardized seasonal greenness (SSG) measure, which represents a general indicator of relative vegetation health. VegOut predicts SSG values at multiple time steps (two to six weeks into the future) based...
Bacteria holding times for fecal coliform by mFC agar method and total coliform and Escherichia coli by Colilert®-18 Quanti-Tray® method
Brent T. Aulenbach
2010, Environmental Monitoring and Assessment (161) 147-159
Bacteria holding-time experiments of up to 62 h were performed on five surface-water samples from four urban stream sites in the vicinity of Atlanta, GA, USA that had relatively high densities of coliform bacteria (Escherichia coli densities were all well above the US Environmental Protection Agency criterion of 126 colonies...
Fine scale daily movements and habitat use of East Pacific green turtles at a shallow coastal lagoon in Baja California Sur, Mexico
Jesse Senko, Volker Koch, William M. Megill, Raymond R. Carthy, R.obert P. Templeton, Wallace J. Nichols
2010, Journal of Experimental Marine Biology and Ecology (391) 92-100
Green turtles spend most of their lives in coastal foraging areas where they face multiple anthropogenic impacts. Therefore, understanding their spatial use in this environment is a priority for conservation efforts. We studied the fine scale daily movements and habitat use of East Pacific green turtles (Chelonia mydas) at Laguna...
Dione's spectral and geological properties
K. Stephan, R. Jaumann, R. Wagner, R. N. Clark, D. P. Cruikshank, C. A. Hibbitts, T. Roatsch, H. Hoffmann, R. H. Brown, G. Filiacchione, B. J. Buratti, G. B. Hansen, T. B. McCord, P. D. Nicholson, K. H. Baines
2010, Icarus (206) 631-652
We present a detailed analysis of the variations in spectral properties across the surface of Saturn's satellite Dione using Cassini/VIMS data and their relationships to geological and/or morphological characteristics as seen in the Cassini/ISS images. This analysis focuses on a local region on Dione's anti-saturnian hemisphere that was observed by...
Building on a legacy: 125 years of USGS topographic map
J. Campbell, M.R. Newell, D.A. Perdue
2010, Photogrammetric Engineering and Remote Sensing (76) 209-213
No abstract available....
Recovery of Renibacterium salmoninarum from naturally infected salmonine stocks in Michigan using a modified culture protocol
M. Faisal, A.E. Eissa, C. E. Starliper
2010, Journal of Advanced Research (1) 95-102
Renibacterium salmoninarum, the causative agent of bacterial kidney disease (BKD), is a fastidious and slow-growing bacterium that is extremely difficult to grow in vitro. Herein, we describe a modified primary culture protocol that encompasses a modified bacteriological culture medium and a tissue processing procedure. In order to facilitate the release...
Numerical simulation of magmatic hydrothermal systems
S. E. Ingebritsen, S. Geiger, S. Hurwitz, T. Driesner
2010, Reviews of Geophysics (48)
The dynamic behavior of magmatic hydrothermal systems entails coupled and nonlinear multiphase flow, heat and solute transport, and deformation in highly heterogeneous media. Thus, quantitative analysis of these systems depends mainly on numerical solution of coupled partial differential equations and complementary equations of state (EOS). The past 2 decades have...
Treated wastewater and Nitrate transport beneath irrigated fields near Dodge city, Kansas
M. Sophocleous, M.A. Townsend, F. Vocasek, Liwang Ma, K.C. Ashok
2010, Current Research in Earth Sciences (258) 1-31
Use of secondary-treated municipal wastewater for crop irrigation south of Dodge City, Kansas, where the soils are mainly of silty clay loam texture, has raised a concern that it has resulted in high nitratenitrogen concentrations (10-50 mg/kg) in the soil and deeper vadose zone, and also in the underlying deep...
Mixing effects on apparent reaction rates and isotope fractionation during denitrification in a heterogeneous aquifer
Christopher T. Green, J.K. Bohlke, Barbara A. Bekins, Steven P. Phillips
2010, Water Resources Research (46)
Gradients in contaminant concentrations and isotopic compositions commonly are used to derive reaction parameters for natural attenuation in aquifers. Differences between field‐scale (apparent) estimated reaction rates and isotopic fractionations and local‐scale (intrinsic) effects are poorly understood for complex natural systems. For a heterogeneous alluvial fan aquifer, numerical models and field...
Model selection bias and Freedman's paradox
P.M. Lukacs, K.P. Burnham, David R. Anderson
2010, Annals of the Institute of Statistical Mathematics (62) 117-125
In situations where limited knowledge of a system exists and the ratio of data points to variables is small, variable selection methods can often be misleading. Freedman (Am Stat 37:152-155, 1983) demonstrated how common it is to select completely unrelated variables as highly "significant" when the number of data points...
Using occupancy models to understand the distribution of an amphibian pathogen, Batrachochytrium dendrobatidis
M. J. Adams, Nathan Chelgren, David M. Reinitz, Rebecca A. Cole, L.J. Rachowicz, Stephanie Galvan, Brome McCreary, Christopher A. Pearl, Larissa L. Bailey, Jamie B. Bettaso, Evelyn L. Bull, Matthias Leu
2010, Ecological Applications (20) 289-302
Batrachochytrium dendrobatidis is a fungal pathogen that is receiving attention around the world for its role in amphibian declines. Study of its occurrence patterns is hampered by false negatives: the failure to detect the pathogen when it is present. Occupancy models are a useful but currently underutilized tool for analyzing...
Effects of invasive alien kahili ginger (Hedychium gardnerianum) on native plant species regeneration in a Hawaiian rainforest
V. Minden, J.D. Jacobi, S. Porembski, H.J. Boehmer
2010, Applied Vegetation Science (13) 5-14
Questions: Does the invasive alien Hedychium gardnerianum (1) replace native understory species, (2) suppress natural regeneration of native plant species, (3) increase the invasiveness of other non-native plants and (4) are native forests are able to recover after removal of H. gardnerianum. Location: A mature rainforest in Hawai'i Volcanoes National...
Reconciling uncertain costs and benefits in bayes nets for invasive species management
M.A. Burgman, B.A. Wintle, C. A. Thompson, A. Moilanen, M.C. Runge, Y. Ben-Haim
2010, Risk Analysis (30) 277-284
Bayes nets are used increasingly to characterize environmental systems and formalize probabilistic reasoning to support decision making. These networks treat probabilities as exact quantities. Sensitivity analysis can be used to evaluate the importance of assumptions and parameter estimates. Here, we outline an application of info-gap theory to Bayes nets that...
Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic
W.G. Burgess, M.A. Hoque, H.A. Michael, C.I. Voss, G. N. Breit, K.M. Ahmed
2010, Nature Geoscience (3) 83-87
Shallow groundwater, the primary water source in the Bengal Basin, contains up to 100 times the World Health Organization (WHO) drinking-water guideline of 10g l 1 arsenic (As), threatening the health of 70 million people. Groundwater from a depth greater than 150m, which almost uniformly meets the WHO guideline, has...
Response of benthic macroinvertebrate communities to highway construction in an Appalachian watershed
Lara B. Hedrick, S.A. Welsh, James T. Anderson, L.-S. Lin, Y. Chen, X. Wei
2010, Hydrobiologia (641) 115-131
Highway construction in mountainous areas can result in sedimentation of streams, negatively impacting stream habitat, water quality, and biotic communities. We assessed the impacts of construction of a segment of Corridor H, a four-lane highway, in the Lost River watershed, West Virginia, by monitoring benthic macroinvertebrate communities and water quality,...
Individual and colony-specific wintering areas of Pacific northern fulmars (Fulmarus glacialis)
Scott A. Hatch, Verena A. Gill, Daniel M. Mulcahy
2010, Canadian Journal of Fisheries and Aquatic Sciences (67) 386-400
Seabird mortality associated with longline fishing in the eastern Bering Sea occurs mainly from September to May, with northern fulmars (Fulmarus glacialis) comprising the majority (60%) of the bycatch. Along the west coast of North America, winter dieoffs of fulmars may be increasing in frequency and magnitude, the most severe...
Estimating black bear density using DNA data from hair snares
B. Gardner, J. Andrew Royle, M.T. Wegan, R.E. Rainbolt, Paul D. Curtis
2010, Journal of Wildlife Management (74) 318-325
DNA-based mark-recapture has become a methodological cornerstone of research focused on bear species. The objective of such studies is often to estimate population size; however, doing so is frequently complicated by movement of individual bears. Movement affects the probability of detection and the assumption of closure of the population required...
Nest and chick survival and colony-site dynamics of least terns in the U.S. Virgin Islands
Claudia D. Lombard, Jaime Collazo, Douglas B. McNair
2010, The Condor (112) 56-64
We report nest and chick survival and colony-site dynamics of the Least Tern (Sternula antillarum). These results are the first for the Caribbean and were derived with likelihood-based approaches from 4640 nests and 44 chicks fitted with transmitters monitored in 52 colonies at St. Croix, U.S. Virgin Islands, 2003–2006. Managed...
Occurrence of organic wastewater and other contaminants in cave streams in northeastern Oklahoma and northwestern Arkansas
Joseph R. Bidwell, Carol Becker, S. Hensley, R. Stark, Michael T. Meyer
2010, Archives of Environmental Contamination and Toxicology (58) 286-298
The prevalence of organic wastewater compounds in surface waters of the United States has been reported in a number of recent studies. In karstic areas, surface contaminants might be transported to groundwater and, ultimately, cave ecosystems, where they might impact resident biota. In this study, polar organic chemical integrative samplers...
Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river
P.B. Shafroth, A.C. Wilcox, D.A. Lytle, J.T. Hickey, D.C. Andersen, Vanessa B. Beauchamp, A. Hautzinger, L.E. McMullen, A. Warner
2010, Freshwater Biology (55) 68-85
Successful environmental flow prescriptions require an accurate understanding of the linkages among flow events, geomorphic processes and biotic responses. We describe models and results from experimental flow releases associated with an environmental flow program on the Bill Williams River (BWR), Arizona, in arid to semiarid western U.S.A. Two general approaches...
