Duration of a large Mafic intrusion and heat transfer in the lower crust: A SHRIMP U-Pb zircon Study in the Ivrea-Verbano Zone (Western Alps, Italy)
G. Peressini, J. E. Quick, S. Sinigoi, A.W. Hofmann, M. Fanning
2007, Journal of Petrology (48) 1185-1218
The Ivrea-Verbano Zone in the western Italian Alps contains one of the world's classic examples of ponding of mantle-derived, mafic magma in the deep crust. Within it, a voluminous, composite mafic pluton, the Mafic Complex, intruded lower-crustal, high-grade paragneiss of the Kinzigite Formation during Permian-Carboniferous time, and is now exposed...
Mars reconnaissance orbiter's high resolution imaging science experiment (HiRISE)
Alfred S. McEwen, Eric M. Eliason, James W. Bergstrom, Nathan T. Bridges, Candice J. Hansen, W. Alan Delamere, John A. Grant, Virginia C. Gulick, Kenneth E. Herkenhoff, Laszlo P. Keszthelyi, Randolph L. Kirk, Michael T. Mellon, Steven W. Squyres, Nicolas Thomas, Catherine M. Weitz
2007, Journal of Geophysical Research E: Planets (112)
The HiRISE camera features a 0.5 m diameter primary mirror, 12 m effective focal length, and a focal plane system that can acquire images containing up to 28 Gb (gigabits) of data in as little as 6 seconds. HiRISE will provide detailed images (0.25 to 1.3 m/pixel) covering ∼1% of...
Infectious Diseases of Wild Birds
N. J. Thomas, D. Bruce Hunter, C. T. Atkinson
2007, Book
Fault locking, block rotation and crustal deformation in the Pacific Northwest
Robert McCaffrey, Anthony I. Qamar, Robert W. King, Ray E. Wells, G. Khazaradze, C.A. Williams, C.W. Stevens, J.J. Vollick, P.C. Zwick
2007, Geophysical Journal International (169) 1315-1340
We interpret Global Positioning System (GPS) measurements in the northwestern United States and adjacent parts of western Canada to describe relative motions of crustal blocks, locking on faults and permanent deformation associated with convergence between the Juan de Fuca and North American plates. To estimate angular velocities of the...
Variation in the establishment of a non-native annual grass influences competitive interactions with Mojave Desert perennials
L.A. DeFalco, G.C.J. Fernandez, R.S. Nowak
2007, Biological Invasions (9) 293-307
Competition between native and non-native species can change the composition and structure of plant communities, but in deserts, the highly variable timing of resource availability also influences non-native plant establishment, thus modulating their impacts on native species. In a field experiment, we varied densities of the non-native annual grass Bromus...
Avian chlamydiosis
A. A. Andersen, J. Christian Franson
Nancy J. Thomas, D. Bruce Hunter, Carter T. Atkinson, editor(s)
2007, Book chapter, Infectious diseases of wild birds
This chapter contains section titled:IntroductionSynonymsHistoryDistribution and Host RangeEpizootiologyClinical SignsPathogenesisPathologyDiagnosisImmunityPublic Health ConcernsDomestic Animal Health ConcernsWildlife Population ImpactsTreatment and ControlManagement ImplicationsUnpublished DataLiterature Cited...
Soil nematode communities are ecologically more mature beneath late- than early-successional stage biological soil crusts
B.J. Darby, D.A. Neher, J. Belnap
2007, Applied Soil Ecology (35) 203-212
Biological soil crusts are key mediators of carbon and nitrogen inputs for arid land soils and often represent a dominant portion of the soil surface cover in arid lands. Free-living soil nematode communities reflect their environment and have been used as biological indicators of soil condition. In this study, we...
Simulation of Intra- or transboundary surface-water-rights hierarchies using the farm process for MODFLOW-2000
W. Schmid, R. T. Hanson
2007, Journal of Water Resources Planning and Management (133) 166-178
Water-rights driven surface-water allocations for irrigated agriculture can be simulated using the farm process for MODFLOW-2000. This paper describes and develops a model, which simulates routed surface-water deliveries to farms limited by streamflow, equal-appropriation allotments, or a ranked prior-appropriation system. Simulated diversions account for deliveries to all...
The Pennsylvanian-early permian bird spring carbonate shelf, Southeastern California: Fusulinid biostratigraphy, paleogeographic evolution, and tectonic implications
C.H. Stevens, P. Stone
2007, Special Paper of the Geological Society of America (429) 1-82
The Bird Spring Shelf in southeastern California, along with coeval turbidite basins to the west, records a complex history of late Paleozoic sedimentation, sea-level changes, and deformation along the western North American continental margin. We herein establish detailed correlations between deposits of the shelf and the flanking basins, which we...
Improving the accuracy of sediment-associated constituent concentrations in whole storm water samples by wet-sieving
W.R. Selbig, R. Bannerman, G. Bowman
2007, Journal of Environmental Quality (36) 226-232
Sand-sized particles (>63 ??m) in whole storm water samples collected from urban runoff have the potential to produce data with substantial bias and/or poor precision both during sample splitting and laboratory analysis. New techniques were evaluated in an effort to overcome some of the limitations associated with sample splitting and...
Detrital zircon geochronology of some neoproterozoic to triassic rocks in interior Alaska
D. C. Bradley, W.C. McClelland, J. L. Wooden, A.B. Till, S. M. Roeske, Marti L. Miller, Susan M. Karl, J.G. Abbott
2007, Special Paper of the Geological Society of America 155-189
No abstract available. ...
Thermal, chemical, and optical properties of Crater Lake, Oregon
G.L. Larson, R.L. Hoffman, D. C. McIntire, M.W. Buktenica, S.F. Girdner
2007, Hydrobiologia (574) 69-84
Crater Lake covers the floor of the Mount Mazama caldera that formed 7700 years ago. The lake has a surface area of 53 km2 and a maximum depth of 594 m. There is no outlet stream and surface inflow is limited to small streams and springs. Owing to its great...
Prioritizing bottomland hardwood forest sites for protection and augmentation
J. Carter, J. Biagas
2007, Natural Areas Journal (27) 72-82
Bottomland hardwood forest has been greatly diminished by conversion to agriculture. Less than 25% of the pre-Columbian bottomland hardwood forests remain in the southeastern United States. Because of the valuable ecological and hydrological functions performed by these forests, their conservation and restoration has been a high priority. Part of these...
Bora event variability and the role of air-sea feedback
J. Pullen, J.D. Doyle, T. Haack, C. Dorman, R. P. Signell, C.M. Lee
2007, Journal of Geophysical Research C: Oceans (112)
A two-way interacting high resolution numerical simulation of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS??) was conducted to improve forecast momentum and heat flux fields, and to evaluate surface flux field differences for two consecutive bora events during February...
Reconstructing the response of C3 and C4 plants to decadal-scale climate change during the late Pleistocene in southern Illinois using isotopic analyses of calcified rootlets
Hongfang Wang, S.E. Greenberg
2007, Quaternary Research (67) 136-142
The ??13C and ??18O values of well-preserved carbonate rhizoliths (CRs) provide detailed insights into changes in the abundance of C3 and C4 plants in response to approximately decadal-scale changes in growing-season climate. We performed stable isotope analyses on 35-40 CRs sampled at 1-cm intervals from an 18-cm-thick paleosol formed in...
Effects of upland disturbance and instream restoration on hydrodynamics and ammonium uptake in headwater streams
B.J. Roberts, P. J. Mulholland, J.N. Houser
2007, Journal of the North American Benthological Society (26) 38-53
Delivery of water, sediments, nutrients, and organic matter to stream ecosystems is strongly influenced by the catchment of the stream and can be altered greatly by upland soil and vegetation disturbance. At the Fort Benning Military Installation (near Columbus, Georgia), spatial variability in intensity of military training results in a...
Optimizing remote sensing and GIS tools for mapping and managing the distribution of an invasive mangrove (Rhizophora mangle) on South Molokai, Hawaii
M. D'Iorio, S.D. Jupiter, S.A. Cochran, D.C. Potts
2007, Marine Geodesy (30) 125-144
In 1902, the Florida red mangrove, Rhizophora mangle L., was introduced to the island of Molokai, Hawaii, and has since colonized nearly 25% of the south coast shoreline. By classifying three kinds of remote sensing imagery, we compared abilities to detect invasive mangrove distributions and to discriminate mangroves from surrounding...
Controls on mercury and methylmercury deposition for two watersheds in Acadia National Park, Maine
K.B. Johnson, T.A. Haines, J. S. Kahl, S. A. Norton, A. Amirbahman, K.D. Sheehan
2007, Environmental Monitoring and Assessment (126) 55-67
Throughfall and bulk precipitation samples were collected for two watersheds at Acadia National Park, Maine, from 3 May to 16 November 2000, to determine which landscape factors affected mercury (Hg) deposition. One of these watersheds, Cadillac Brook, burned in 1947, providing a natural experimental design to study the effects of...
Effects of wastewater disinfection on waterborne bacteria and viruses
E. R. Blatchley III, W.-L. Gong, J.E. Alleman, J.B. Rose, D.E. Huffman, M. Otaki, J.T. Lisle
2007, Water Environment Research (79) 81-92
Wastewater disinfection is practiced with the goal of reducing risks of human exposure to pathogenic microorganisms. In most circumstances, the efficacy of a wastewater disinfection process is regulated and monitored based on measurements of the responses of indicator bacteria. However, inactivation of indicator bacteria does not guarantee an acceptable degree...
Mesogondolella and Jinogondolella (Conodonta): Multielement definition of the taxa that bracket the basal Guadalupian (Middle Permian Series) GSSP
L.L. Lambert, B. R. Wardlaw, C.M. Henderson
2007, Palaeoworld (16) 208-221
Multielement definitions are presented here for Mesogondolella and Jinogondolella based on species that bracket the basal Guadalupian (Middle Permian Series) GSSP. Distinctive apparatus characters that appear with the first Jinogondolella include several details of P2 element dimorphism and process bifurcation in S3 elements. The sequential expression of these multielement characters...
Conditions for coexistence of freshwater mussel species via partitioning of fish host resources
Brenda Rashleigh, D.L. DeAngelis
2007, Ecological Modelling (201) 171-178
Riverine freshwater mussel species can be found in highly diverse communities where many similar species coexist. Mussel species potentially compete for food and space as adults, and for fish host resources during the larval (glochidial) stage. Resource partitioning at the larval stage may promote coexistence. A model of resource utilization...
Climate correlates of 20 years of trophic changes in a high-elevation riparian system
T. E. Martin
2007, Ecology (88) 367-380
The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study....
Factors influencing movement probabilities of big brown bats (Eptesicus fuscus) in buildings
L.E. Ellison, T. J. O'Shea, D.J. Neubaum, R. A. Bowen
2007, Ecological Applications (17) 620-627
We investigated movements of female big brown bats (Eptesicus fuscus) roosting in maternity colonies in buildings in Fort Collins, Colorado (USA), during the summers of 2002, 2003, and 2005. This behavior can be of public health concern where bats that may carry diseases (e.g., rabies) move among buildings occupied by...
Origin and emplacement of impactites in the Chesapeake Bay impact structure, Virginia, USA
J. Wright Horton, Jr., Gregory Gohn, David S. Powars, Lucy E. Edwards
2007, Special Paper of the Geological Society of America 73-97
The late Eocene Chesapeake Bay impact structure, located on the Atlantic margin of Virginia, may be Earth's best-preserved large impact structure formed in a shallow marine, siliciclastic, continental-shelf environment. It has the form of an inverted...
Profiling refined hydrocarbon fuels using polar components
Colleen E. Rostad, Frances D. Hostettler
2007, Environmental Forensics (8) 129-137
Identification of a fuel released into the environment can be difficult due to biodegradation or weathering. Negative electrospray ionization/mass spectrometry was used to screen for unique polar components in a wide variety of commercial hydrocarbon products and mixtures. These fuels produced unique and relatively simple spectra. When applied to hydrocarbon...
