Age-0 Lost River sucker and shortnose sucker nearshore habitat use in Upper Klamath Lake, Oregon: A patch occupancy approach
S. M. Burdick, H.A. Hendrixson, S. P. VanderKooi
2008, Transactions of the American Fisheries Society (137) 417-430
We examined habitat use by age-0 Lost River suckers Deltistes luxatus and shortnose suckers Chasmistes brevirostris over six substrate classes and in vegetated and nonvegetated areas of Upper Klamath Lake, Oregon. We used a patch occupancy approach to model the effect of physical habitat and water quality conditions on habitat...
The relative contribution of processes driving variability in flow, shear, and turbidity over a fringing coral reef: West Maui, Hawaii
C. D. Storlazzi, B. E. Jaffe
2008, Estuarine, Coastal and Shelf Science (77) 549-564
High-frequency measurements of waves, currents and water column properties were made on a fringing coral reef off northwest Maui, Hawaii, for 15 months between 2001 and 2003 to aid in understanding the processes governing flow and turbidity over a range of time scales and their contributions to annual budgets. The...
M-log A observations for recent large earthquakes
Thomas C. Hanks, W. H. Bakun
2008, Bulletin of the Seismological Society of America (98) 490-494
Using a magnitude (M)-log area (A) dataset augmented with seven large (M > 7.0) earthquakes occurring since Wells and Coppersmith (1994), this short note assesses the current validity of the bilinear M-log A relations for continental, strike-slip earthquakes proposed by Hanks and Bakun (2002), in particular the L-model scaling at...
Proximate cues for a short-distance migratory species: An application of survival analysis
J. Meunier, R. Song, R.S. Lutz, D. E. Andersen, K.E. Doherty, J.G. Bruggink, E. Oppelt
2008, Journal of Wildlife Management (72) 440-448
Investigation of bird migration has often highlighted the importance of external factors in determining timing of migration However, little distinction has been made between short- and long-distance migrants and between local and flight birds (passage migrants) in describing migration chronology. In addition, measures of food abundance as a proximate factor...
Surface drift prediction in the Adriatic Sea using hyper-ensemble statistics on atmospheric, ocean and wave models: Uncertainties and probability distribution areas
M. Rixen, E. Ferreira-Coelho, R. Signell
2008, Journal of Marine Systems (69) 86-98
Despite numerous and regular improvements in underlying models, surface drift prediction in the ocean remains a challenging task because of our yet limited understanding of all processes involved. Hence, deterministic approaches to the problem are often limited by empirical assumptions on underlying physics. Multi-model hyper-ensemble forecasts, which exploit the power...
Quaternary geology and sedimentary processes in the vicinity of Six Mile Reef, eastern Long Island Sound
L.J. Poppe, S.J. Williams, M. S. Moser, N.A. Forfinski, H.F. Stewart, E. F. Doran
2008, Journal of Coastal Research (24) 255-266
Six Mile Reef, a sandy, 22-m-high shoal trending east-west and located about 7.8 km off the Connecticut coast, has a core of postglacial marine deltaic deposits mantled by tidally reworked modern sediments. Sedimentary environments off the eastern end of the shoal are characterized by processes associated with long-term erosion or...
Deformation and rupture of the oceanic crust may control growth of Hawaiian volcanoes
J.-L. Got, V. Monteiller, J. Monteux, R. Hassani, P. Okubo
2008, Nature (451) 453-456
Hawaiian volcanoes are formed by the eruption of large quantities of basaltic magma related to hot-spot activity below the Pacific Plate. Despite the apparent simplicity of the parent process - emission of magma onto the oceanic crust - the resulting edifices display some topographic complexity. Certain features, such as rift...
Greenland ice sheet surface temperature, melt and mass loss: 2000-06
D.K. Hall, R.S. Williams Jr., S.B. Luthcke, N.E. DiGirolamo
2008, Journal of Glaciology (54) 81-93
A daily time series of 'clear-sky' surface temperature has been compiled of the Greenland ice sheet (GIS) using 1 km resolution moderate-resolution imaging spectroradiometer (MODIS) land-surface temperature (LST) maps from 2000 to 2006. We also used mass-concentration data from the Gravity Recovery and Climate Experiment (GRACE) to study mass change...
Occurrence and fate of pesticides in four contrasting agricultural settings in the United States
G. V. Steele, H.M. Johnson, Mark W. Sandstrom, P. D. Capel, J.E. Barbash
2008, Journal of Environmental Quality (37) 1116-1132
Occurrence and fate of 45 pesticides and 40 pesticide degradates were investigated in four contrasting agricultural settings—in Maryland, Nebraska, California, and Washington. Primary crops included corn at all sites, soybeans in Maryland, orchards in California and Washington, and vineyards in Washington. Pesticides and pesticide degradates detected in water samples from...
Wide-area estimates of stand structure and water use of tamarix spp. on the lower colorado river: Implications for restoration and water management projects
P.L. Nagler, E. P. Glenn, K. Didan, J. Osterberg, F. Jordan, J. Cunningham
2008, Restoration Ecology (16) 136-145
Tamarix spp. removal has been proposed to salvage water and allow native vegetation to recolonize western U.S. riparian corridors. We conducted wide-area studies on the Lower Colorado River to answer some of the scientific questions about Tamarix water use and the consequences of removal, combining ground surveys with remote sensing...
Winter survival of Eurasian woodcock Scolopax rusticola in central Italy
A. Aradis, M.W. Miller, G. Landucci, P. Ruda, S. Taddei, F. Spina
2008, Wildlife Biology (14) 36-43
The Eurasian woodcock Scolopax rusticola is a popular game bird in much of Europe. However, little is known about its population dynamics. We estimated winter survival of woodcock in a protected area with no hunting in central Italy. We radio-tagged 68 woodcocks with battery-powered radio-transmitters during 2001-2005. Woodcocks were captured...
Relations between nutritional condition and survival of North American elk Cervus elaphus
Louis C. Bender, J.G. Cook, R.C. Cook, P.B. Hall
2008, Wildlife Biology (14) 70-80
We related annual and seasonal survival of four populations of elk Cervus elaphus in the Pacific Northwest, USA, to measures and indices of individual nutritional condition. Among populations, for all mortality (human and non-human causes) sources inclusive, annual survival of adult females was correlated with a rump body condition score...
Joint inversion of fundamental and higher mode Rayleigh waves
Y.-H. Luo, J.-H. Xia, J.-P. Liu, Q.-S. Liu
2008, Chinese Journal of Geophysics (Acta Geophysica Sinica) (51) 242-249
In this paper, we analyze the characteristics of the phase velocity of fundamental and higher mode Rayleigh waves in a six-layer earth model. The results show that fundamental mode is more sensitive to the shear velocities of shallow layers (< 7 m) and concentrated in a very narrow band (around...
An overview of methods for developing bioenergetic and life history models for rare and endangered species
J.H. Petersen, D.L. DeAngelis, C.P. Paukert
2008, Transactions of the American Fisheries Society (137) 244-253
Many fish species are at risk to some degree, and conservation efforts are planned or underway to preserve sensitive populations. For many imperiled species, models could serve as useful tools for researchers and managers as they seek to understand individual growth, quantify predator-prey dynamics, and identify critical sources of mortality....
Seasonal frost effects on the dynamic behavior of a twenty-story office building
Z. Yang, U. Dutta, F. Xiong, N. Biswas, H. Benz
2008, Cold Regions Science and Technology (51) 76-84
Studies have shown that seasonal frost can significantly affect the seismic behavior of a bridge foundation system in cold regions. However, little information could be found regarding seasonal frost effects on the dynamic behavior of buildings. Based on the analysis of building vibration data recorded by a permanent strong-motion instrumentation...
Role of NSO compounds during primary cracking of a Type II kerogen and a Type III lignite
F. Behar, F. Lorant, M. Lewan
2008, Organic Geochemistry (39) 1-22
The aim of this work is to follow the generation of NSO compounds during the artificial maturation of an immature Type II kerogen and a Type III lignite in order to determine the different sources of the petroleum potential during primary cracking. Experiments were carried out in closed system pyrolysis...
Recent bright gully deposits on Mars: Wet or dry flow?
Jon D. Pelletier, Kelly J. Kolb, Alfred S. McEwen, Randolph L. Kirk
2008, Geology (36) 211-214
Bright gully sediments attributed to liquid water flow have been deposited on Mars within the past several years. To test the liquid water flow hypothesis, we constructed a high-resolution (1 m/pixel) photogrammetric digital elevation model of a crater in the Centauri Montes region, where a bright gully deposit formed between...
Titan's surface from the Cassini RADAR radiometry data during SAR mode
F. Paganelli, M.A. Janssen, R.M. Lopes, E. Stofan, S. D. Wall, R. D. Lorenz, J. I. Lunine, Randolph L. Kirk, L. Roth, C. Elachi
2008, Planetary and Space Science (56) 100-108
We present initial results on the calibration and interpretation of the high-resolution radiometry data acquired during the Synthetic Aperture Radar (SAR) mode (SAR-radiometry) of the Cassini Radar Mapper during its first five flybys of Saturn's moon Titan.We construct maps of the brightness temperature at the 2-cm wavelength coincident with SAR...
Soil modification by invasive plants: Effects on native and invasive species of mixed-grass prairies
N.R. Jordan, D.L. Larson, S.C. Huerd
2008, Biological Invasions (10) 177-190
Invasive plants are capable of modifying attributes of soil to facilitate further invasion by conspecifics and other invasive species. We assessed this capability in three important plant invaders of grasslands in the Great Plains region of North America: leafy spurge (Euphorbia esula), smooth brome (Bromus inermis) and crested wheatgrass (Agropyron...
Groundwater nutrient concentrations near an incised midwestern stream: Effects of floodplain lithology and land management
K. E. Schilling, P. Jacobson
2008, Biogeochemistry (87) 199-216
It has been recognized that subsurface lithology plays an important role in controlling nutrient cycling and transport in riparian zones. In Iowa and adjacent states, the majority of alluvium preserved in small and moderate sized valleys consists of Holocene-age organic-rich, and fine-grained loam. In this paper, we describe and evaluate...
Comparisons between consumption estimates from bioenergetics simulations and field measurements for walleyes from Oneida Lake, New York
B.F. Lantry, L. G. Rudstam, J.L. Forney, A.J. VanDeValk, E.L. Mills, D.J. Stewart, J.V. Adams
2008, Transactions of the American Fisheries Society (137) 1406-1421
Daily consumption was estimated from the stomach contents of walleyes Sander vitreus collected weekly from Oneida Lake, New York, during June-October 1975, 1992, 1993, and 1994 for one to four age-groups per year. Field rations were highly variable between weeks, and trends in ration size varied both seasonally and annually....
Using demography and movement behavior to predict range expansion of the southern sea otter.
M. T. Tinker, D.F. Doak, J. A. Estes
2008, Ecological Applications (18) 1781-1794
In addition to forecasting population growth, basic demographic data combined with movement data provide a means for predicting rates of range expansion. Quantitative models of range expansion have rarely been applied to large vertebrates, although such tools could be useful for restoration and management of many threatened but recovering populations....
Numerical modeling of time-lapse monitoring of CO2 sequestration in a layered basalt reservoir
M. Khatiwada, K. Van Wijk, W.P. Clement, M. Haney
2008, Conference Paper, SEG Technical Program Expanded Abstracts
As part of preparations in plans by The Big Sky Carbon Sequestration Partnership (BSCSP) to inject CO2 in layered basalt, we numerically investigate seismic methods as a noninvasive monitoring technique. Basalt seems to have geochemical advantages as a reservoir for CO2 storage (CO2 mineralizes quite rapidly while exposed to basalt),...
Application of high-resolution linear Radon transform for Rayleigh-wave dispersive energy imaging and mode separating
Y. Luo, J. Xia, R. D. Miller, J. Liu, Y. Xu, Q. Liu
2008, Conference Paper, SEG Technical Program Expanded Abstracts
Multichannel Analysis of Surface Waves (MASW) analysis is an efficient tool to obtain the vertical shear-wave profile. One of the key steps in the MASW method is to generate an image of dispersive energy in the frequency-velocity domain, so dispersion curves can be determined by picking peaks of dispersion energy....
Aseismic slip and fault-normal strain along the central creeping section of the San Andreas fault
F. Rolandone, R. Burgmann, D.C. Agnew, I.A. Johanson, D.C. Templeton, M. A. d'Alessio, S.J. Titus, C. DeMets, B. Tikoff
2008, Geophysical Research Letters (35)
We use GPS data to measure the aseismic slip along the central San Andreas fault (CSAF) and the deformation across adjacent faults. Comparison of EDM and GPS data sets implies that, except for small-scale transients, the fault motion has been steady over the last 40 years. We add 42 new...
