Obtaining parsimonious hydraulic conductivity fields using head and transport observations: A Bayesian geostatistical parameter estimation approach
Michael N. Fienen, R. Hunt, D. Krabbenhoft, T. Clemo
2009, Water Resources Research (45)
Flow path delineation is a valuable tool for interpreting the subsurface hydrogeochemical environment. Different types of data, such as groundwater flow and transport, inform different aspects of hydrogeologic parameter values (hydraulic conductivity in this case) which, in turn, determine flow paths. This work combines flow and transport information to estimate...
Decision making with epistemic uncertainty under safety constraints: An application to seismic design
D. Veneziano, A. Agarwal, E. Karaca
2009, Probabilistic Engineering Mechanics (24) 426-437
The problem of accounting for epistemic uncertainty in risk management decisions is conceptually straightforward, but is riddled with practical difficulties. Simple approximations are often used whereby future variations in epistemic uncertainty are ignored or worst-case scenarios are postulated. These strategies tend to produce sub-optimal decisions. We develop a general framework...
Coastal marsh response to historical and future sea-level acceleration
M. Kirwan, S. Temmerman
2009, Quaternary Science Reviews (28) 1801-1808
We consider the response of marshland to accelerations in the rate of sea-level rise by utilizing two previously described numerical models of marsh elevation. In a model designed for the Scheldt Estuary (Belgium-SW Netherlands), a feedback between inundation depth and suspended sediment concentrations allows marshes to quickly adjust their elevation...
Evidence that pairing with genetically similar mates is maladaptive in a monogamous bird
Herve Mulard, E. Danchin, Sandra L. Talbot, Andrew M. Ramey, Scott A. Hatch, J.F. White, F. Helfenstein, R.H. Wagner
2009, BMC Evolutionary Biology (9)
BackgroundEvidence of multiple genetic criteria of mate choice is accumulating in numerous taxa. In many species, females have been shown to pair with genetically dissimilar mates or with extra-pair partners that are more genetically compatible than their social mates, thereby increasing their offsprings' heterozygosity which often correlates with...
Accelerated weathering of limestone for CO2 mitigation: Opportunities for the stone and cement industries
William H. Langer, Carma A. San Juan, Greg H. Rau, Ken Caldeira
2009, Mining Engineering (61) 27-32
Large amounts of limestone fines co-produced during the processing of crushed limestone may be useful in the sequestration of carbon dioxide (CO2). Accelerated weathering of limestone (AWL) is proposed as a low-tech method to capture and sequester CO2 from fossil fuel-fired power plants and other point sources such as cement manufacturing....
Retention of riverine sediment and nutrient loads by coastal plain floodplains
G.B. Noe, C.R. Hupp
2009, Ecosystems (12) 728-746
Despite the frequent citation of wetlands as effective regulators of water quality, few quantitative estimates exist for their cumulative retention of the annual river loads of nutrients or sediments. Here we report measurements of sediment accretion and associated carbon, nitrogen, and phosphorus accumulation as sedimentation over feldspar marker horizons placed...
Nonlinear processes in volcanoes
Bernard A. Chouet
Robert A. Meyers, editor(s)
2009, Book chapter, Encyclopedia of Complexity and System Science
No abstract available...
Analytical modeling of gravity changes and crustal deformation at volcanoes: The Long Valley caldera, California, case study
Maurizio Battaglia, D.P. Hill
2009, Tectonophysics (471) 45-57
Joint measurements of ground deformation and micro-gravity changes are an indispensable component for any volcano monitoring strategy. A number of analytical mathematical models are available in the literature that can be used to fit geodetic data and infer source location, depth and density. Bootstrap statistical methods allow estimations of the...
The July-August 2008 hydrovolcanic eruption of Okmok Volcano, Umnak Island, Alaska
Christina A. Neal, Jessica F. Larsen, Janet Schaefer
2009, Alaska Geological Society Newsletter (39) 1-3
No abstract available...
Status and trends of the Lake Huron deepwater demersal fish ommunity, 2008
Edward F. Roseman, Timothy P. O’Brien, Stephen C. Riley, Steve A. Farha, John R. French
2009, Conference Paper
The U.S.Geological Survey Great Lakes Science Center has conducted trawl surveys to assess annual changes in the deepwater demersal fish community of Lake Huron since 1973. Since 1992, surveys have been carried out using a 21 m wing trawl towed on-contour at depths ranging from 9 to 110 m on...
Volumetric visualization of multiple-return LIDAR data: Using voxels
Jason M. Stoker
2009, Photogrammetric Engineering and Remote Sensing (75) 109-112
Elevation data are an important component in the visualization and analysis of geographic information. The creation and display of 3D models representing bare earth, vegetation, and surface structures have become a major focus of light detection and ranging (lidar) remote sensing research in the past few years. Lidar is an...
Analyzing bat migration
Paul M. Cryan, Robert H. Diehl
2009, Book chapter, Ecological and behavioral methods for the study of bats
T HE MIGRATORY MOVEIvl.ENTS OF BATS have proven ex tremely difficult to determine. Despite extensive efforts during the past century to track the movements of bats across landscapes, efficient methods of following small- to medium-size volant animals <240 gl for extended periods (>8 weeks) over long distances (>100 km) have...
Warmwater fish in large standing waters
L.E. Miranda, Jeff Boxrucker
Scott A. Bonar, Wayne A. Hubert, David W. Willis, editor(s)
2009, Book chapter, Standard methods for sampling North American freshwater fishes
Large standing waters are defined as those larger than 200 ha. Water temperature is a major determinant of fish assemblages in large standing water of North America (Matthews 1998 ). From a thermal perspective, eaters are broadly classified into coldwater (inhabited by trout and salmon) and warmwater (intolerable to trout...
Mammals of the Smokies
Edward Pivorun, M. J. Harvey, F.T. Van Manen, M.R. Pelton, J. D. Clark, E. Kim Delozier, B. Stiver
Steve Kemp, Kent Cave, editor(s)
2009, Book
Guide to the most popular and famous critters in the Great Smoky Mountains National Park. Includes bear, elk, deer, flying squirrels, and buffalo....
Behavior of steelhead fry in a laboratory stream is affected by fish density but not rearing environment
Stephen C. Riley, Christopher P. Tatara, Barry A. Berejikian, Thomas A. Flagg
2009, North American Journal of Fisheries Management (29) 1806-1818
We quantified the aggression, feeding, dominance, position choice, and territory size of naturally reared steelhead Oncorhynchus mykiss fry stocked with two types of hatchery-reared fry (from conventional and enriched rearing environments) at two densities in experimental flumes to determine how rearing environment and fish density affect the behavior of steelhead...
Long-term changes in quiescent degassing at Mount Baker Volcano, Washington, USA; Evidence for a stalled intrusion in 1975 and connection to a deep magma source
Cynthia A. Werner, William C. Evans, Michael P. Poland, Michael P. Doukas, D.S. Tucker
2009, Journal of Volcanology and Geothermal Research (186) 379-386
Long-term changes have occurred in the chemistry, isotopic ratios, and emission rates of gas at Mount Baker volcano following a major thermal perturbation in 1975. In mid-1975 a large pulse in sulfur and carbon dioxide output was observed both in emission rates and in fumarole samples. Emission rates of CO2...
Use of dendrochronology and dendrochemistry in environmental forensics: Does it meet the Daubert criteria?
J.-C. Balouet, K.T. Smith, D. Vroblesky, G. Oudijk
2009, Environmental Forensics (10) 268-276
Dendrochronological methods have been in use for more than 100 years, providing us a record of climate, human activities (archaeology), floods, fire, mudslides and other geological and biological events. More recently, dendrochemisty has been used to assess the time frames of the onset and existence of environmental contamination. This article...
Evidence of multidecadal climate variability and the Atlantic Multidecadal Oscillation from a Gulf of Mexico sea-surface temperature-proxy record
R.Z. Poore, K. L. DeLong, J.N. Richey, T. M. Quinn
2009, Geo-Marine Letters (29) 477-484
A comparison of a Mg/Ca-based sea-surface temperature (SST)-anomaly record from the northern Gulf of Mexico, a calculated index of variability in observed North Atlantic SST known as the Atlantic Multidecadal Oscillation (AMO), and a tree-ring reconstruction of the AMO contain similar patterns of variation over the last 110 years. Thus,...
The increasing wildfire and post-fire debris-flow threat in western USA, and implications for consequences of climate change
Susan H. Cannon, Jerry DeGraff
2009, Book chapter, This is a chapter in the book <i>Landslides � Disaster Risk Reduction</i>
In southern California and the intermountain west of the USA, debris flows generated from recently-burned basins pose significant hazards. Increases in the frequency and size of wildfires throughout the western USA can be attributed to increases in the number of fire ignitions, fire suppression practices, and climatic influences. Increased urbanization...
Oxygen and hydrogen isotope fractionation in serpentine-water and talc-water systems from 250 to 450 °C, 50 MPa
Peter J. Saccocia, Jeffrey S. Seewald, Wayne C. Shanks III
2009, Geochimica et Cosmochimica Acta (73) 6789-6804
Oxygen and hydrogen isotope fractionation factors in the talc–water and serpentine–water systems have been determined by laboratory experiment from 250 to 450 °C at 50 MPa using the partial exchange technique. Talc was synthesized from brucite + quartz, resulting in nearly 100% exchange during reaction at 350 and 450 °C. For serpentine, D–H exchange was...
Can kittiwakes smell? Experimental evidence in a larid species
S. Leclaire, Herve Mulard, R.H. Wagner, Scott A. Hatch, E. Danchin
2009, Ibis (151) 584-587
Birds have long been thought to have a poor sense of smell, although they have the proper anatomical and neurological structures for detecting olfactory cues (Roper 1999). However, in the past decade several bird species have been shown to use smell in various contexts, such as foraging (Nevitt et al. 1995), navigation (Wallraff...
Evolution and preservation potential of fluvial and transgressive deposits on the Louisiana inner shelf: Understanding depositional processes to support coastal management
J. Flocks, M.D. Miner, D.C. Twichell, D. L. Lavoie, J. Kindinger
2009, Geo-Marine Letters (29) 359-378
The barrier-island systems of the Mississippi River Delta plain are currently undergoing some of the highest rates of shoreline retreat in North America (~20 m/year). Effective management of this coastal area requires an understanding of the processes involved in shoreline erosion and measures that can be...
Predictive models for fish assemblages in eastern USA streams: implications for assessing biodiversity
Michael R. Meador, Daren M. Carlisle
2009, Transactions of the American Fisheries Society (138) 725-740
Management and conservation of aquatic systems require the ability to assess biological conditions and identify changes in biodiversity. Predictive models for fish assemblages were constructed to assess biological condition and changes in biodiversity for streams sampled in the eastern United States as part of the U.S. Geological Survey's National Water...
Stratigraphic controls on seawater intrusion and implications for groundwater management, Dominguez Gap area of Los Angeles, California, USA
Tracy Nishikawa, Adam J. Siade, Eric G. Reichard, Daniel J. Ponti, A.G. Canales, T.A. Johnson
2009, Hydrogeology Journal (17) 1699-1725
Groundwater pumping has led to extensive water-level declines and seawater intrusion in coastal Los Angeles, California (USA). A SUTRA-based solute-transport model was developed to test the hydraulic implications of a sequence-stratigraphic model of the Dominguez Gap area and to assess the effects of water-management scenarios. The model is two-dimensional, vertical...
THE subfossil occurrence and paleoecological significance of small mammals at ankilitelo cave, southwestern Madagascar
K.M. Muldoon, D. D. De Blieux, E.L. Simons, P.S. Chatrath
2009, Journal of Mammalogy (90) 1111-1131
Small mammals are rarely reported from subfossil sites in Madagascar despite their importance for paleoenvironmental reconstruction, especially as it relates to recent ecological changes on the island. We describe the uniquely rich subfossil small mammal fauna from Ankilitelo Cave, southwestern Madagascar. The Ankilitelo fauna is dated to the late...
