Subsidy or subtraction: how do terrestrial inputs influence consumer production in lakes?
Stuart E. Jones, Christopher T. Solomon, Brian Weidel
2012, Freshwater Reviews (5) 37-49
Cross-ecosystem fluxes are ubiquitous in food webs and are generally thought of as subsidies to consumer populations. Yet external or allochthonous inputs may in fact have complex and habitat-specific effects on recipient ecosystems. In lakes, terrestrial inputs of organic carbon contribute to basal resource availability, but can also reduce resource...
Significant motions between GPS sites in the New Madrid region: implications for seismic hazard
Arthur Frankel, Robert Smalley, J. Paul
2012, Bulletin of the Seismological Society of America (102) 479-489
Position time series from Global Positioning System (GPS) stations in the New Madrid region were differenced to determine the relative motions between stations. Uncertainties in rates were estimated using a three‐component noise model consisting of white, flicker, and random walk noise, following the methodology of Langbein, 2004. Significant motions of...
Loss and modification of habitat
Francis Lemckert, Stephen Hecnar, David S. Pilliod
2012, Book chapter, Conservation and decline of amphibians: Ecological aspects, effect of humans, and management
Amphibians live in a wide variety of habitats around the world, many of which have been modified or destroyed by human activities. Most species have unique life history characteristics adapted to specific climates, habitats (e.g., lentic, lotic, terrestrial, arboreal, fossorial, amphibious), and local conditions that provide suitable areas for reproduction,...
Pyrite–sulfosalt reactions and semimetal fractionation in the Chinkuashih, Taiwan, copper–gold deposit: A 1 Ma paleo-fumarole
R.W. Henley, Byron R. Berger
2012, Geofluids (12) 245-260
The mineralized fracture system that underlay paleo-fumarole field at Chinkuashih, Taiwan has been exposed by copper–gold mining to depths of about 550 m below the paleo-surface. Its mineralogy and systematic variations in metal and semimetal (Fe, Cu, As, Sb, Bi, Hg, Cd, Sn, Zn, Pb, Se, Te, Au, Ag) concentrations provide...
A program for handling map projections of small-scale geospatial raster data
Michael P. Finn, Daniel R. Steinwand, Jason R. Trent, Robert A. Buehler, David M. Mattli, Kristina H. Yamamoto
2012, Cartographic Perspectives (71) 53-67
Scientists routinely accomplish small-scale geospatial modeling using raster datasets of global extent. Such use often requires the projection of global raster datasets onto a map or the reprojection from a given map projection associated with a dataset. The distortion characteristics of these projection transformations can have significant effects on modeling...
Concurrent speciation in the eastern woodland salamanders (Genus Plethodon):DNA sequences of the complete albumin nuclear and partialmitochondrial 12s genes
Richard Highton, Amy Picard Hastings, Catherine Palmer, Richard Watts, Carla A. Hass, Melanie Culver, Stevan Arnold
2012, Molecular Phylogenetics and Evolution (63) 278-290
Salamanders of the North American plethodontid genus Plethodon are important model organisms in a variety of studies that depend on a phylogenetic framework (e.g., chemical communication, ecological competition, life histories, hybridization, and speciation), and consequently their systematics has been intensively investigated over several decades. Nevertheless, we lack a synthesis of...
New Zealand’s deadliest quake sounds alarm for cities on fault lines
Erol Kalkan
2012, Natural Hazards Observer (36) 1-4
The catastrophic Christ Church Earthquake is a strong reminder to engineers and scientists of the hazards pose by fault lines, both mapped and unknown, near major cities. In February 2011, the relatively moderate earthquake that struck the cities of Christchurch and Lyttleton in the Canterbury region of New Zealand's South...
Sources of shaking and flooding during the Tohoku-Oki earthquake: a mixture of rupture styles
Shengji Wei, Robert Graves, Don Helmberger, Jean-Philippe Avouac, Junle Jiang
2012, Earth and Planetary Science Letters (333-334) 91-100
Modeling strong ground motions from great subduction zone earthquakes is one of the great challenges of computational seismology. To separate the rupture characteristics from complexities caused by 3D sub-surface geology requires an extraordinary data set such as provided by the recent Mw9.0 Tohoku-Oki earthquake. Here we combine deterministic inversion and...
Using computational modeling of river flow with remotely sensed data to infer channel bathymetry
Jonathan M. Nelson, Richard R. McDonald, Paul J. Kinzel, Y. Shimizu
2012, Conference Paper, IAHR Riverflow 2012 Conference Proceedings
As part of an ongoing investigation into the use of computational river flow and morphodynamic models for the purpose of correcting and extending remotely sensed river datasets, a simple method for inferring channel bathymetry is developed and discussed. The method is based on an inversion of the equations expressing conservation...
Sexual selection and mating chronology of Lesser Prairie-Chickens
Adam C. Behney, Blake A. Grisham, Clint W. Boal, Heather A. Whitlaw, David A. Haukos
2012, Wilson Journal of Ornithology (124) 96-105
Little is known about mate selection and lek dynamics of Lesser Prairie-Chickens (Tympanuchus pallidicinctus). We collected data on male territory size and location on leks, behavior, and morphological characteristics and assessed the importance of these variables on male Lesser Prairie-Chicken mating success during spring 2008 and 2009 in the Texas...
Productivity and sedimentary δ15N variability for the last 17,000 years along the northern Gulf of Alaska continental slope
Jason A. Addison, Bruce P. Finney, Walter E. Dean, Maureen H. Davies, Alan C. Mix, John M. Jaeger
2012, Paleoceanography (27)
Biogenic opal, organic carbon, organic matter stable isotope, and trace metal data from a well-dated, high-resolution jumbo piston core (EW0408–85JC; 59° 33.3′N, 144° 9.21′W, 682 m water depth) recovered from the northern Gulf of Alaska continental slope reveal changes in productivity and nutrient utilization over the last 17,000 years. Maximum...
Basin thickness variations at the Junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: How thick could the Pliocene sections be?
Victoria E. Langenheim, Tammy L. Surko, Phillip A. Armstrong, Jonathan C. Matti
2012, Conference Paper, Searching for the Pliocene: southern exposures, Annual Desert Symposium Proceedings
We estimate the thickness of Neogene basin fill along the junction of the Eastern California Shear Zone and the North Frontal thrust system of the San Bernardino Mountains using gravity data with geologic and well log constraints. The geometry of the basin fill is of interest for groundwater assessment and location of potential...
Long-term impacts of invasive species on a native top predator in a large lake system
Scott A. Rush, Gordon Paterson, Tim B. Johnson, Ken G. Drouillard, Gordon D. Haffner, Craig E. Hebert, Michael T. Arts, Daryl J. McGoldrick, Sean M. Backus, Brian F. Lantry, Jana R. Lantry, Ted Schaner, Aaron T. Fisk
2012, Freshwater Biology (57) 2342-2355
1. Declining abundances of forage fish and the introduction and establishment of non-indigenous species have the potential to substantially alter resource and habitat exploitation by top predators in large lakes. 2. We measured stable isotopes of carbon (δ13C) and nitrogen (δ15N) in field-collected and archived samples of Lake Ontario lake trout (Salvelinus...
Digital elevation model generation from satellite interferometric synthetic aperture radar: Chapter 5
Zhong Lu, Daniel Dzurisin, Hyung-Sup Jung, Lei Zhang, Wonjin Lee, Chang-Wook Lee
2012, Book chapter, Advances in mapping from remote sensor imagery
An accurate digital elevation model (DEM) is a critical data set for characterizing the natural landscape, monitoring natural hazards, and georeferencing satellite imagery. The ideal interferometric synthetic aperture radar (InSAR) configuration for DEM production is a single-pass two-antenna system. Repeat-pass single-antenna satellite InSAR imagery, however, also can be used to...
A Bayesian method to rank different model forecasts of the same volcanic ash cloud: Chapter 24
Roger P. Denlinger, P. Webley, Larry G. Mastin, Hans F. Schwaiger
2012, Book chapter, Lagrangian Modeling of the Atmosphere
Volcanic eruptions often spew fine ash high into the atmosphere, where it is carried downwind, forming long ash clouds that disrupt air traffic and pose a hazard to air travel. To mitigate such hazards, the community studying ash hazards must assess risk of ash ingestion for any flight path and...
Assessing potential effects of changes in water use with a numerical groundwater-flow model of Carson Valley, Douglas County, Nevada, and Alpine County, California
Richard M. Yager, Douglas K. Maurer, C.J. Mayers
2012, Scientific Investigations Report 2012-5262
Rapid growth and development within Carson Valley in Douglas County, Nevada, and Alpine County, California, has caused concern over the continued availability of groundwater, and whether the increased municipal demand could either impact the availability of water or result in decreased flow in the Carson River. Annual pumpage of groundwater...
Floods of June 2012 in northeastern Minnesota
Christiana R. Czuba, James D. Fallon, Erich W. Kessler
2012, Scientific Investigations Report 2012-5283
During June 19–20, 2012, heavy rainfall, as much as 10 inches locally reported, caused severe flooding across northeastern Minnesota. The floods were exacerbated by wet antecedent conditions from a relatively rainy spring, with May 2012 as one of the wettest Mays on record in Duluth. The June 19–20, 2012, rainfall...
Using spatially detailed water-quality data and solute-transport modeling to improve support total maximum daily load development
Katherine Walton-Day, Robert L. Runkel, Briant A. Kimball
2012, Journal of the American Water Resources Association (48) 949-969
Spatially detailed mass-loading studies and solute-transport modeling using OTIS (One-dimensional Transport with Inflow and Storage) demonstrate how natural attenuation and loading from distinct and diffuse sources control stream water quality and affect load reductions predicted in total maximum daily loads (TMDLs). Mass-loading data collected during low-flow from Cement Creek (a...
Timing of large earthquakes during the past 500 years along the Santa Cruz Mountains segment of the San Andreas fault at Mill Canyon, near Watsonville, California
Thomas E. Fumal
2012, Bulletin of the Seismological Society of America (102) 1099-1119
A paleoseismic investigation across the Santa Cruz Mountains section of the San Andreas fault at Mill Canyon indicates that four surface‐rupturing earthquakes have occurred there during the past ~500 years. At this site, right‐lateral fault slip has moved a low shutter ridge across the mouth of the canyon, ponding latest Holocene...
Wave-induced mass transport affects daily Escherichia coli fluctuations in nearshore water
Zhongfu Ge, Richard L. Whitman, Meredith B. Nevers, Mantha S. Phanikumar
2012, Environmental Science & Technology (46) 2204-2211
Characterization of diel variability of fecal indicator bacteria concentration in nearshore waters is of particular importance for development of water sampling standards and protection of public health. Significant nighttime increase in Escherichia coli (E. coli) concentration in beach water, previously observed at marine sites, has also been identified in summer...
A vectorial capacity product to monitor changing malaria transmission potential in epidemic regions of Africa
Pietro Ceccato, Christelle Vancutsem, Robert Klaver, James Rowland, Stephen J. Connor
2012, Journal of Tropical Medicine (2012) 1-6
Rainfall and temperature are two of the major factors triggering malaria epidemics in warm semi-arid (desert-fringe) and high altitude (highland-fringe) epidemic risk areas. The ability of the mosquitoes to transmit Plasmodium spp. is dependent upon a series of biological features generally referred to as vectorial capacity. In this study, the...
Estimating seasonal evapotranspiration from temporal satellite images
Ramesh K. Singh, Shu-Guang Liu, Larry L. Tieszen, Andrew E. Suyker, Shashi B. Verma
2012, Irrigation Science (30) 303-313
Estimating seasonal evapotranspiration (ET) has many applications in water resources planning and management, including hydrological and ecological modeling. Availability of satellite remote sensing images is limited due to repeat cycle of satellite or cloud cover. This study was conducted to determine the suitability of different methods namely cubic spline, fixed,...
Novel approach for computing photosynthetically active radiation for productivity modeling using remotely sensed images in the Great Plains, United States
Ramesh K. Singh, Shu-Guang Liu, Larry L. Tieszen, Andrew E. Suyker, Shashi B. Verma
2012, Journal of Applied Remote Sensing (6)
Gross primary production (GPP) is a key indicator of ecosystem performance, and helps in many decision-making processes related to environment. We used the Eddy covariancelight use efficiency (EC-LUE) model for estimating GPP in the Great Plains, United States in order to evaluate the performance of this model. We developed a...
Effects of activity and energy budget balancing algorithm on laboratory performance of a fish bioenergetics model
Charles P. Madenjian, Solomon R. David, Steven A. Pothoven
2012, Transactions of the American Fisheries Society (141) 1328-1337
We evaluated the performance of the Wisconsin bioenergetics model for lake trout Salvelinus namaycush that were fed ad libitum in laboratory tanks under regimes of low activity and high activity. In addition, we compared model performance under two different model algorithms: (1) balancing the lake trout energy budget on day...
Advanced methods for modeling water-levels and estimating drawdowns with SeriesSEE, an Excel add-in
Keith Halford, C. Amanda Garcia, Joe Fenelon, Benjamin B. Mirus
2012, Techniques and Methods 4-F4
Water-level modeling is used for multiple-well aquifer tests to reliably differentiate pumping responses from natural water-level changes in wells, or “environmental fluctuations.” Synthetic water levels are created during water-level modeling and represent the summation of multiple component fluctuations, including those caused by environmental forcing and pumping. Pumping signals are modeled...
