Quantifying potential tsunami hazard in the Puysegur subduction zone, south of New Zealand
G.P. Hayes, K.P. Furlong
2010, Geophysical Journal International (183) 1512-1524
Studies of subduction zone seismogenesis and tsunami potential, particularly of large subduction zones, have recently seen a resurgence after the great 2004 earthquake and tsunami offshore of Sumatra, yet these global studies have generally neglected the tsunami potential of small subduction zones such as the Puysegur subduction zone, south of...
Recruitment of burbot (Lota lota L.) in Lake Erie: An empirical modelling approach
M.A. Stapanian, L.D. Witzel, A. Cook
2010, Ecology of Freshwater Fish (19) 326-337
World-wide, many burbot Lota lota (L.) populations have been extirpated or are otherwise in need of conservation measures. By contrast, burbot made a dramatic recovery in Lake Erie during 1993-2001 but declined during 2002-2007, due in part to a sharp decrease in recruitment. We used Akaike's Information Criterion to evaluate...
Coral Ba/Ca records of sediment input to the fringing reef of the southshore of Moloka'i, Hawai'i over the last several decades
N.G. Prouty, M.E. Field, J. D. Stock, S.D. Jupiter, M. McCulloch
2010, Marine Pollution Bulletin (60) 1822-1835
The fringing reef of southern Moloka’i is perceived to be in decline because of land-based pollution. In the absence of historical records of sediment pollution, ratios of coral Ba/Ca were used to test the hypothesis that sedimentation has increased over time. Baseline Ba/Ca ratios co-vary with the abundance of red,...
Environmental drivers of fish functional diversity and composition in the Lower Colorado River Basin
T.K. Pool, J. D. Olden, Joanna B. Whittier, C.P. Paukert
2010, Canadian Journal of Fisheries and Aquatic Sciences (67) 1791-1807
Freshwater conservation efforts require an understanding of how natural and anthropogenic factors shape the present-day biogeography of native and non-native species. This knowledge need is especially acute for imperiled native fishes in the highly modified Lower Colorado River Basin (LCRB), USA. In the present study we employed both a taxonomic...
Zinc isotopic composition of particulate matter generated during the combustion of coal and coal + tire-derived fuels
D.M. Borrok, R. Giere, M. Ren, E. R. Landa
2010, Environmental Science & Technology (44) 9219-9224
Atmospheric Zn emissions from the burning of coal and tire-derived fuel (TDF) for power generation can be considerable. In an effort to lay the foundation for tracking these contributions, we evaluated the Zn isotopes of coal, a mixture of 95 wt % coal + 5 wt % TDF, and the...
Conservation practice establishment in two northeast Iowa watersheds: Strategies, water quality implications, and lessons learned
Philip W. Gassman, J.A. Tisl, E.A. Palas, C.L. Fields, T.M. Isenhart, K. E. Schilling, C.F. Wolter, L.S. Seigley, M.J. Helmers
2010, Journal of Soil and Water Conservation (65) 381-392
Coldwater trout streams are important natural resources in northeast Iowa. Extensive efforts have been made by state and federal agencies to protect and improve water quality in northeast Iowa streams that include Sny Magill Creek and Bloody Run Creek, which are located in Clayton County. A series of three water...
The role of soil drainage class in carbon dioxide exchange and decomposition in boreal black spruce (Picea mariana) forest stands
K.P. Wickland, J. C. Neff, J.W. Harden
2010, Canadian Journal of Forest Research (40) 2123-2134
Black spruce (Picea mariana (Mill.) B.S.P.) forest stands range from well drained to poorly drained, typically contain large amounts of soil organic carbon (SOC), and are often underlain by permafrost. To better understand the role of soil drainage class in carbon dioxide (CO2) exchange and decomposition, we measured soil respiration...
Effects of nourishment on the form and function of an estuarine beach
N.L. Jackson, K.F. Nordstrom, S. Saini, D. R. Smith
2010, Ecological Engineering (36) 1709-1718
Beach nourishment programs in estuaries can enhance shore protection, but they decrease habitat suitability by creating higher berms and wider backshores than would occur under natural conditions. Use of sediment sources from outside the area can result in sedimentary characteristics that differ from native sediments on the surface and at...
An experimental assessment of vehicle disturbance effects on migratory shorebirds
Nathan M. Tarr, T.R. Simons, K. H. Pollock
2010, Journal of Wildlife Management (74) 1776-1783
Off-road vehicle (ORV) traffic is one of several forms of disturbance thought to affect shorebirds at migration stopover sites. Attempts to measure disturbance effects on shorebird habitat use and behavior at stopover sites are difficult because ORV disturbance is frequently confounded with habitat and environmental factors. We used a before-after-control-impact...
Characterization of dissolved organic matter in fogwater by excitation-emission matrix fluorescence spectroscopy
J.E. Birdwell, K.T. Valsaraj
2010, Atmospheric Environment (44) 3246-3253
Dissolved organic matter (DOM) present in fogwater samples collected in southeastern Louisiana and central-eastern China has been characterized using excitation-emission matrix fluorescence spectroscopy. The goal of the study was to illustrate the utility of fluorescence for obtaining information on the large fraction of organic carbon in fogwaters (typically >40% by...
Seismic hazard mapping of California considering site effects
E. Kalkan, C.J. Wills, D.M. Branum
2010, Earthquake Spectra (26) 1039-1055
In this paper, we have combined the U.S. Geological Survey's National Seismic Hazard Maps model with the California geologic map showing 17 generalized geologic units that can be defined by their VS30. We regrouped these units into seven VS30 values and calculated a probabilistic seismic hazard map for the entire...
Occurrence of West Nile virus infection in raptors at the Salton Sea, California
Robert J. Dusek, William M. Iko, Erik K. Hofmeister
2010, Journal of Wildlife Diseases (46) 889-895
We investigated the prevalence of West Nile virus (WNV)-neutralizing antibodies and infectious virus, and the occurrence of overwinter transmission in two raptor species during January and March 2006 at the Salton Sea, Imperial County, California. We captured 208 American Kestrels (Falco sparverius) (January, n=100; March, n=108) and 116 Burrowing Owls (Athene cunicularia)...
Factors influencing the at-sea distribution of Cassin's Auklets (Ptychoramphus aleuticus) that breed in the Channel Islands, California
Josh Adams, John Y. Takekawa, Harry R. Carter, Julie L. Yee
2010, The Auk (127) 503-513
We used radiotelemetry to evaluate at-sea habitat use by Cassin's Auklets (Ptychoramphus aleuticus) that bred at Prince Island, off southern California, from 1999 through 2001. We used logistic regression to compare paired radiotelemetry (presence) with random (pseudo-absence) location-associated habitat variables derived from (1) satellite remote-sensing of sea surface temperature and...
Computational modeling of bedform evolution in rivers with implications for predictions of flood stage and bed evolution
Jonathan M. Nelson, Yasuyuki Shimizu, Sanjay Giri, Richard R. McDonald
2010, Conference Paper, Proceedings of the 4th Federal Interagency Hydrologic Modeling Conference and the 9th Federal Interagency Sedimentation Conference
Uncertainties in flood stage prediction and bed evolution in rivers are frequently associated with the evolution of bedforms over a hydrograph. For the case of flood prediction, the evolution of the bedforms may alter the effective bed roughness, so predictions of stage and velocity based on assuming bedforms retain the...
Forest exlosures: an experimental approach to understanding browsing by moose and deer
Stephen DeStefano, Edward K. Faison, J. Compton, David W. Wattles
2010, Massachusetts Wildlife (60) 14-17
No abstract available....
Geometric evaluation and validation of aerial and satellite data using Sioux Falls Geometric test range
Aparajithan Sampath, Donald Moe, Jon Christopherson, Gregory L. Stensaas
2010, Conference Paper, ASPRS 2010 Annual Conference
No abstract available....
Geophysical framework of the northern San Francisco Bay region, California
Victoria E. Langenheim, Russell W. Graymer, Robert C. Jachens, Robert J. McLaughlin, D.L. Wagner, Donald S. Sweetkind
2010, Geosphere (6) 594-620
We use geophysical data to examine the structural framework of the northern San Francisco Bay region, an area that hosts the northward continuation of the East Bay fault system. Although this fault system has accommodated ∼175 km of right-lateral offset since 12 Ma, how this offset is partitioned north of...
Ocean and coastal data management
Jeff de La Beaujardiere, C J Beegle-Krause J, Luis Bermudez, Steven C. Hankin, Lisa Hazard, Eoin Howlett, Steven Le, Roger Proctor, Richard P. Signell, Derrick P. Snowden, Julie Thomas
2010, Conference Paper, Proceedings of OceanObs'09: Sustained Ocean Observations and Information for Society, Vol. 2
We introduce data management concepts, including what we mean by "data" and its "management," sources of data, interoperability, and data geometry. We then discuss various components of a data management system. Finally, we summarize some existing ocean and coastal data management efforts. We make specific recommendations throughout the paper. We...
A review of silver-rich mineral deposits and their metallogeny
Frederick Graybeal, Peter G. Vikre
2010, Book chapter, The challenge of finding new mineral resources: Global metallogeny, innovative exploration, and new discoveries; SEG Special Publication 15 Vol. 1
Mineral deposits with large inventories or high grades of silver are found in four genetic groups: (1) volcanogenic massive sulfide (VMS), (2) sedimentary exhalative (SEDEX), (3) lithogene, and, (4) magmatichydrothermal. Principal differences between the four groups relate to source rocks and regions, metal associations, process and timing of mineralization, and...
Rapid evolution in lekking grouse: Implications for taxonomic definitions
Sara J. Oyler-McCance, Judy St. John, Thomas W. Quinn
2010, Ornithological Monographs (67) 114-122
Species and subspecies delineations were traditionally defined by morphological and behavioral traits, as well as by plumage characteristics. Molecular genetic data have more recently been used to assess these classifications and, in many cases, to redefine them. The recent practice of utilizing molecular genetic data to examine taxonomic questions has...
The cleaning of burned and contaminated archaeological maize prior to 87Sr/86Sr analysis
Larry V. Benson, Howard E. Taylor, Terry I. Plowman, David A. Roth, Ronald C. Antweiler
2010, Journal of Archaeological Science (37) 84-91
Accurate trace-metal and strontium-isotope analyses of archaeological corn cobs require that metal contaminants be removed prior to chemical analysis. Archaeological cobs are often coated with construction debris, dust, or soil which contains mineral particles. In addition, most archaeological cobs are partially or completely burned and the burned parts incorporate mineral...
Anomalous spawning of smallmouth bass in Nebish Lake, Wisconsin: Implications for early spawning and over-winter survival
Peter James Brown, Michael A. Bozek
2010, Journal of Freshwater Ecology (25) 169-177
We observed that the smallmouth bass (Micropterus dolomieu) population in Nebish Lake, Wisconsin spawned twice-once during the traditional spring period and then again in summer, well beyond the typical spawning season for north-temperate lakes. We documented this anomalous spawning behavior and compared the characteristics of smallmouth bass nests built during...
Tectonic controls on nearshore sediment accumulation and submarine canyon morphology offshore La Jolla, Southern California
Nicolas Le Dantec, Leah J. Hogarth, Neal W. Driscoll, Jeffrey M. Babcock, Walter A. Barnhardt, William C. Schwab
2010, Marine Geology (268) 115-128
CHIRP seismic and swath bathymetry data acquired offshore La Jolla, California provide an unprecedented three-dimensional view of the La Jolla and Scripps submarine canyons. Shore-parallel patterns of tectonic deformation appear to control nearshore sediment thickness and distribution around the canyons. These shore-parallel patterns allow the impact of local tectonic deformation...
Caution on the use of liquid nitrogen traps in stable hydrogen isotope-ratio mass spectrometry
Tyler B. Coplen, Haiping Qi
2010, Analytical Chemistry (82) 7849-7851
An anomalous stable hydrogen isotopic fractionation of 4 ‰ in gaseous hydrogen has been correlated with the process of adding liquid nitrogen (LN2) to top off the dewar of a stainless-steel water trap on a gaseous hydrogen-water platinum equilibration system. Although the cause of this isotopic fractionation is unknown, its...
Pre‐moult patterns of habitat use and moult site selection by Brent Geese Branta bernicla nigricans: Individuals prospect for moult sites
Tyler Lewis, Paul L. Flint, Joel A. Schmutz, Dirk V. Derksen
2010, Ibis (152) 556-568
In environments where habitat quality varies, the mechanism by which individuals assess and select habitats has significant consequences on their spatial distribution and ability to respond to environmental change. Each year, thousands of Black Brent Geese Branta bernicla nigricans migrate to the Teshekpuk Lake Special Area (TLSA), Alaska, to undergo...
