The contingent behavior of charter fishing participants on the Chesapeake Bay: Welfare estimates associated with water quality improvements
P.J. Poor, M. Breece
2006, Journal of Environmental Planning and Management (49) 265-278
Water quality in the Chesapeake Bay has deteriorated over recent years. Historically, fishing has contributed to the region's local economy in terms of commercial and recreational harvests. A contingent behavior model is used to estimate welfare measures for charter fishing participants with regard to a hypothetical improvement in water quality....
Colony mapping: A new technique for monitoring crevice-nesting seabirds
H.M. Renner, M. Renner, J.H. Reynolds, A.M.A. Harping, I.L. Jones, D.B. Irons, G.V. Byrd
2006, Condor (108) 423-434
Monitoring populations of auklets and other crevice-nesting seabirds remains problematic, although numerous methods have been attempted since the mid-1960s. Anecdotal evidence suggests several large auklet colonies have recently decreased in both abundance and extent, concurrently with vegetation encroachment and succession. Quantifying changes in the geographical extent of auklet colonies may...
Fault parameter constraints using relocated earthquakes: A validation of first-motion focal-mechanism data
Debi Kilb, J.L. Hardebeck
2006, Bulletin of the Seismological Society of America (96) 1140-1158
We estimate the strike and dip of three California fault segments (Calaveras, Sargent, and a portion of the San Andreas near San Jaun Bautistia) based on principle component analysis of accurately located microearthquakes. We compare these fault orientations with two different first-motion focal mechanism catalogs: the Northern California...
Regional intensity attenuation models for France and the estimation of magnitude and location of historical earthquakes
W. H. Bakun, O. Scotti
2006, Geophysical Journal International (164) 596-610
Intensity assignments for 33 calibration earthquakes were used to develop intensity attenuation models for the Alps, Armorican, Provence, Pyrenees and Rhine regions of France. Intensity decreases with ?? most rapidly in the French Alps, Provence and Pyrenees regions, and least rapidly in the Armorican and Rhine regions. The comparable Armorican...
Sensitivity of Last Glacial Maximum climate to uncertainties in tropical and subtropical ocean temperatures
S. Hostetler, N. Pisias, A. Mix
2006, Quaternary Science Reviews (25) 1168-1185
The faunal and floral gradients that underlie the CLIMAP (1981) sea-surface temperature (SST) reconstructions for the Last Glacial Maximum (LGM) reflect ocean temperature gradients and frontal positions. The transfer functions used to reconstruct SSTs from biologic gradients are biased, however, because at the warmest sites they display inherently low sensitivity...
The impact of runoff generation mechanisms on the location of critical source areas
S. W. Lyon, M.R. McHale, M. Walter, T.S. Steenhuis
2006, Journal of the American Water Resources Association (42) 793-804
Identifying phosphorus (P) source areas and transport pathways is a key step in decreasing P loading to natural water systems. This study compared the effects of two modeled runoff generation processes - saturation excess and infiltration excess - on total phosphorus (TP) and soluble reactive phosphorus (SRP) concentrations in 10...
Change in atmospheric mineral aerosols in response to climate: Last glacial period, preindustrial, modern, and doubled carbon dioxide climates
N. M. Mahowald, D.R. Muhs, S. Levis, P.J. Rasch, M. Yoshioka, C.S. Zender, C. Luo
2006, Journal of Geophysical Research D: Atmospheres (111)
Desert dust simulations generated by the National Center for Atmospheric Research's Community Climate System Model for the current climate are shown to be consistent with present day satellite and deposition data. The response of the dust cycle to last glacial maximum, preindustrial, modern, and doubled-carbon dioxide climates is analyzed. Only...
Regional-scale assessment of a sequence-bounding paleosol on fluvial fans using ground-penetrating radar, eastern San Joaquin Valley, California
V.G.L. Bennett, G.S. Weissmann, G.S. Baker, D.W. Hyndman
2006, Geological Society of America Bulletin (118) 724-732
Recently developed sequence stratigraphic models for fluvial fans suggest that sequence boundaries in these deposits are marked by laterally extensive paleosols; however, these models were based on paleosol correlations inferred between wells. To test this, we collected ???190 km of ground-penetrating radar (GPR) profiles on three fluvial fans from the...
The prelaying interval of emperor geese on the Yukon-Kuskokwim Delta, Alaska
Jerry W. Hupp, Joel A. Schmutz, Craig R. Ely
2006, Condor (108) 912-924
We marked 136 female Emperor Geese (Chen canagica) in western Alaska with VHF or satellite (PTT) transmitters from 1999 to 2003 to monitor their spring arrival and nest initiation dates on the Yukon Delta, and to estimate prelaying interval lengths once at the nesting area. Ninety-two females with functional transmitters...
Reproductive condition and occurrence of intersex in bighead carp and silver carp in the Missouri River
D. M. Papoulias, D. Chapman, D. E. Tillitt
2006, Hydrobiologia (571) 355-360
Little is known about the reproductive biology of the exotic bighead carp Hypophthalmichthys nobilis and silver carp Hypophthalmichthys molitrix in the Missouri River. In order to fill this gap in understanding, herein is described the reproductive condition of these Asian carps. Evidence is presented which indicates that bighead and silver...
Erosion rates at the Mars Exploration Rover landing sites and long-term climate change on Mars
M.P. Golombek, J. A. Grant, L.S. Crumpler, R. Greeley, R. E. Arvidson, J.F. Bell III, C.M. Weitz, R.J. Sullivan, P. R. Christensen, L.A. Soderblom, S. W. Squyres
2006, Journal of Geophysical Research E: Planets (111)
Erosion rates derived from the Gusev cratered plains and the erosion of weak sulfates by saltating sand at Meridiani Planum are so slow that they argue that the present dry and desiccating environment has persisted since the Early Hesperian. In contrast, sedimentary rocks at Meridiani formed in the presence of...
Development of spatially diverse and complex dune-field patterns: Gran Desierto Dune Field, Sonora, Mexico
C. Beveridge, G. Kocurek, R.C. Ewing, N. Lancaster, P. Morthekai, A.K. Singhvi, S. A. Mahan
2006, Sedimentology (53) 1391-1409
The pattern of dunes within the Gran Desierto of Sonora, Mexico, is both spatially diverse and complex. Identification of the pattern components from remote-sensing images, combined with statistical analysis of their measured parameters demonstrate that the composite pattern consists of separate populations of simple dune patterns. Age-bracketing by optically stimulated...
Dynamics of seismogenic volcanic extrusion at Mount St Helens in 2004-05
R.M. Iverson, D. Dzurisin, C. A. Gardner, T.M. Gerlach, R.G. LaHusen, M. Lisowski, J. J. Major, S. D. Malone, J.A. Messerich, S.C. Moran, J.S. Pallister, A.I. Qamar, S. P. Schilling, J.W. Vallance
2006, Nature (444) 439-443
The 2004-05 eruption of Mount St Helens exhibited sustained, near-equilibrium behaviour characterized by relatively steady extrusion of a solid dacite plug and nearly periodic shallow earthquakes. Here we present a diverse data set to support our hypothesis that these earthquakes resulted from stick-slip motion along the margins of the plug...
Gimme shelter: The importance of crevices to some fish species inhabiting a deeper-water rocky outcrop in Southern California
M.S. Love, D.M. Schroeder, B. Lenarz, G.R. Cochrane
2006, California Cooperative Oceanic Fisheries Investigations Reports (47) 119-126
Federal law governing fisheries management recognizes the role habitat plays in structuring fish assemblages and achieving sustainable fisheries. However, in most instances it is not known which aspects of habitat are important to the lives of fish species. In 2004, we examined the importance of sheltering sites (crevices) to fishes...
Posttournament survival and dispersal of adult striped bass
S.P. Young, J. Jeffery Isely
2006, North American Journal of Fisheries Management (26) 1030-1033
We conducted a telemetry study from November 2004 to June 2005 at J. Strom Thurmond Reservoir in South Carolina and Georgia to quantify posttournament survival of striped bass and their dispersal from tournament weigh-in sites. During November-December 2004, 30 adult striped bass weighing 1.0-10.0 kg were angled, held in "striped...
Use of the moon to support on-orbit sensor calibration for climate change measurements
T.C. Stone, H. H. Kieffer
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
Production of reliable climate datasets from multiple observational measurements acquired by remote sensing satellite systems available now and in the future places stringent requirements on the stability of sensors and consistency among the instruments and platforms. Detecting trends in environmental parameters measured at solar reflectance wavelengths (0.3 to 2.5 microns)...
Toxicity of synthetic musks to early life stages of the freshwater mussel Lampsilis cardium
M.P. Gooding, T.J. Newton, M.R. Bartsch, K.C. Hornbuckle
2006, Archives of Environmental Contamination and Toxicology (51) 549-558
Polycyclic musk fragrances are common additives to many consumer products. As a result of their widespread use and slow degradation rates, they are widely found in aquatic environments. This study reports on the lethal and sublethal toxicity of the polycyclic musks AHTN (Tonalide??) and HHCB (Galaxolide??) to glochidial (larval) and...
Invasion patterns along elevation and urbanization gradients in Hawaiian streams
A.M.D. Brasher, C.D. Luton, S. L. Goodbred, R.H. Wolff
2006, Transactions of the American Fisheries Society (135) 1109-1129
Hawaii's extreme isolation has resulted in a native stream fauna characterized by high endemism and unusual life history characteristics. With the rapid increase in the human population, the viability of Hawaiian stream ecosystems is threatened by development and the associated habitat alteration. Thirty-eight sites on three islands (Oahu, Kauai, and...
Surface fault slip associated with the 2004 Parkfield, California, earthquake
M. J. Rymer, J. C. Tinsley III, J.A. Treiman, J.R. Arrowsmith, K.B. Ciahan, A.M. Rosinski, W. A. Bryant, Hollice A. Snyder, G. S. Fuis, N.A. Toke, G.W. Bawden
2006, Bulletin of the Seismological Society of America (96)
Surface fracturing occurred along the San Andreas fault, the subparallel Southwest Fracture Zone, and six secondary faults in association with the 28 September 2004 (M 6.0) Parkfield earthquake. Fractures formed discontinuous breaks along a 32-km-long stretch of the San Andreas fault. Sense of slip was right lateral; only locally was...
Reversing storm hotspots on sandy beaches: Spatial and temporal characteristics
J. H. List, A.S. Farris, C. Sullivan
2006, Marine Geology (226) 261-279
Coastal erosion hotspots are defined as sections of coast that exhibit significantly higher rates of erosion than adjacent areas. This paper describes the spatial and temporal characteristics of a recently identified type of coastal erosion hotspot, which forms in response to storms on uninterrupted sandy coasts largely free from human...
Migration depths of juvenile Chinook salmon and steelhead relative to total dissolved gas supersaturation in a Columbia River reservoir
J.W. Beeman, A.G. Maule
2006, Transactions of the American Fisheries Society (135) 584-594
The in situ depths of juvenile salmonids Oncorhynchus spp. were studied to determine whether hydrostatic compensation was sufficient to protect them from gas bubble disease (GBD) during exposure to total dissolved gas (TDG) supersaturation from a regional program of spill at dams meant to improve salmonid passage survival. Yearling Chinook...
Absolute calibration accuracy of L4 TM and L5 TM sensor image pairs
G. Chander, E. Micijevic
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Landsat suite of satellites has collected the longest continuous archive of multispectral data of any land-observing space program. From the Landsat program's inception in 1972 to the present, the Earth science user community has benefited from a historical record of remotely sensed data. However, little attention has been paid...
Alternate corrections for estimating actual wetland evapotranspiration from potential evapotranspiration
W. Barclay Shoemaker, D. M. Sumner
2006, Wetlands (26) 528-543
Corrections can be used to estimate actual wetland evapotranspiration (AET) from potential evapotranspiration (PET) as a means to define the hydrology of wetland areas. Many alternate parameterizations for correction coefficients for three PET equations are presented, covering a wide range of possible data-availability scenarios. At nine sites in the wetland...
The rocks of Gusev Crater as viewed by the Mini-TES instrument
S. W. Ruff, P. R. Christensen, D.L. Blaney, W. H. Farrand, J. R. Johnson, J.R. Michalski, J.E. Moersch, S.P. Wright, S. W. Squyres
2006, Journal of Geophysical Research E: Planets (111)
The Miniature Thermal Emission Spectrometer (Mini-TES) on board the Mars Exploration Rover Spirit is part of a payload designed to investigate whether a lake once existed in Gusev Crater. Mini-TES has observed hundreds of rocks along the rover's traverse into the Columbia Hills, yielding information on their distribution, bulk mineralogy,...
Myxobolus cerebralis in native cutthroat trout of the Yellowstone Lake ecosystem
T.M. Koel, D.L. Mahony, K. L. Kinnan, C. Rasmussen, C. J. Hudson, S. Murcia, B.L. Kerans
2006, Journal of Aquatic Animal Health (18) 157-175
The exotic parasite Myxobolus cerebralis was first detected in native adult Yellowstone cutthroat trout Oncorhynchus clarkii bouvierii from Yellowstone Lake in 1998, seriously threatening the ecological integrity of this pristine, naturally functioning ecosystem. We immediately began to assess the prevalence and spatial extent of M. cerebralis infection in Yellowstone cutthroat...
