Testing for evidence of maternal effects among individuals and populations of white crappie
D.B. Bunnell, M.A. Scantland, R.A. Stein
2005, Transactions of the American Fisheries Society (134) 607-619
For an increasing number of species, maternal characteristics have been correlated with the characteristics of their eggs or larvae at the individual level. Documenting these maternal effects at the population level, however, is uncommon. For white crappies Pomoxis annularis, we evaluated whether individual maternal effects on eggs existed and then...
3H/3He age data in assessing the susceptibility of wells to contamination
Andrew H. Manning, D. Kip Solomon, Susan A. Thiros
2005, Ground Water (43) 353-367
Regulatory agencies are becoming increasingly interested in using young–ground water dating techniques, such as the 3H/3He method, in assessing the susceptibility of public supply wells (PSWs) to contamination. However, recent studies emphasize that ground water samples of mixed age may be the norm, particularly from long-screened PSWs, and tracer-based “apparent” ages...
Three-dimensional variable-density flow simulation of a coastal aquifer in southern Oahu, Hawaii, USA
S. B. Gingerich, C.I. Voss
2005, Hydrogeology Journal (13) 436-450
Three-dimensional modeling of groundwater flow and solute transport in the Pearl Harbor aquifer, southern Oahu, Hawaii, shows that the readjustment of the freshwater–saltwater transition zone takes a long time following changes in pumping, irrigation, or recharge in the aquifer system. It takes about 50 years for the transition zone to...
An empirical model for estimating annual consumption by freshwater fish populations
H. Liao, C.L. Pierce, J. G. Larscheid
2005, North American Journal of Fisheries Management (25) 525-532
Population consumption is an important process linking predator populations to their prey resources. Simple tools are needed to enable fisheries managers to estimate population consumption. We assembled 74 individual estimates of annual consumption by freshwater fish populations and their mean annual population size, 41 of which also included estimates of...
Grassland bird response to harvesting switchgrass as a biomass energy crop
A.M. Roth, D. W. Sample, C. A. Ribic, L. Paine, D.J. Undersander, G.A. Bartelt
2005, Biomass and Bioenergy (28) 490-498
The combustion of perennial grass biomass to generate electricity may be a promising renewable energy option. Switchgrass (Panicum virgatum) grown as a biofuel has the potential to provide a cash crop for farmers and quality nesting cover for grassland birds. In southwestern Wisconsin (near lat. 42??52???, long. 90??08???), we investigated...
Responses of hybrid striped bass to waterborne and dietary copper in freshwater and saltwater
G.K. Bielmyer, D. Gatlin, J. Jeffery Isely, J. Tomasso, S.J. Klaine
2005, Comparative Biochemistry and Physiology, Part C: Toxicology & Pharmacology (140) 131-137
Mechanisms of copper toxicity and consequences of exposure vary due to uptake route and ionoregulatory status. The goal of this research was to develop a model fish system to assess the influence of different Cu exposure routes (waterborne or dietary) on bioavailability, uptake, and effects in hybrid striped bass (Morone...
Influence of sediment storage on downstream delivery of contaminated sediment
Daniel V. Malmon, Steven L. Reneau, Thomas Dunne, Danny Katzman, Paul G. Drakos
2005, Water Resources Research (41)
Sediment storage in alluvial valleys can strongly modulate the downstream migration of sediment and associated contaminants through landscapes. Traditional methods for routing contaminated sediment through valleys focus on in‐channel sediment transport but ignore the influence of sediment exchanges with temporary sediment storage reservoirs outside the channel, such as floodplains. In...
Simulation of reactive transport of injected CO2 on the Colorado Plateau, Utah, USA
S.P. White, R.G. Allis, Jeff Moore, T. Chidsey, C. Morgan, W. Gwynn, M. Adams
2005, Chemical Geology (217) 387-405
This paper investigates injection of CO2 into non-dome-shaped geological structures that do not provide the traps traditionally deemed necessary for the development of artificial CO2 reservoirs. We have developed a conceptual and two numerical models of the geology and groundwater along a cross-section lying approximately NW-SE and in the vicinity...
Numerical simulation of double‐diffusive finger convection
Joseph D. Hughes, Ward E. Sanford, H. Leonard Vacher
2005, Water Resources Research (41)
A hybrid finite element, integrated finite difference numerical model is developed for the simulation of double‐diffusive and multicomponent flow in two and three dimensions. The model is based on a multidimensional, density‐dependent, saturated‐unsaturated transport model (SUTRA), which uses one governing equation for fluid flow and another for solute transport. The...
Earthquake and ambient vibration monitoring of the steel-frame UCLA factor building
M.D. Kohler, P.M. Davis, E. Safak
2005, Earthquake Spectra (21) 715-736
Dynamic property measurements of the moment-resisting steel-frame University of California, Los Angeles, Factor building are being made to assess how forces are distributed over the building. Fourier amplitude spectra have been calculated from several intervals of ambient vibrations, a 24-hour period of strong winds, and from the 28 March 2003...
Exposing extinction risk analysis to pathogens: Is disease just another form of density dependence?
Leah R. Gerber, Hamish McCallum, Kevin D. Lafferty, John L. Sabo, Andy Dobson
2005, Ecological Applications (15) 1402-1414
In the United States and several other countries, the development of population viability analyses (PVA) is a legal requirement of any species survival plan developed for threatened and endangered species. Despite the importance of pathogens in natural populations, little attention has been given to host-pathogen dynamics in PVA. To study...
Influence of topographic complexity on solar insolation estimates for the Colorado River, Grand Canyon, AZ
M.D. Yard, G.E. Bennett, S.N. Mietz, L.G. Coggins Jr., L.E. Stevens, S. Hueftle, D.W. Blinn
2005, Ecological Modelling (183) 157-172
Rugged topography along the Colorado River in Glen and Grand Canyons, exemplifies features common to canyon-bound streams and rivers of the arid southwest. Physical relief influences regulated river systems, especially those that are altered, and have become partially reliant on aquatic primary production. We measured and modeled instantaneous solar flux...
The composition of coexisting jarosite-group minerals and water from the Richmond mine, Iron Mountain, California
Heather E. Jamieson, Clare Robinson, Charles N. Alpers, D. Kirk Nordstrom, Alexei Poustovetov, Heather A. Lowers
2005, Canadian Mineralogist (43) 1225-1242
Jarosite-group minerals accumulate in the form of stalactites and fine-grained mud on massive pyrite in the D drift of the Richmond mine, Iron Mountain, California. Water samples were collected by placing beakers under the dripping stalactites and by extracting pore water from the mud using a centrifuge. The water is...
Assessments of urban growth in the Tampa Bay watershed using remote sensing data
G. Xian, M. Crane
2005, Remote Sensing of Environment (97) 203-215
Urban development has expanded rapidly in the Tampa Bay area of west-central Florida over the past century. A major effect associated with this population trend is transformation of the landscape from natural cover types to increasingly impervious urban land. This research utilizes an innovative approach for mapping urban extent and...
Evidence for subsurface water ice in Korolev crater, Mars
John C. Armstrong, Timothy N. Titus, Hugh H. Kieffer
2005, Icarus (174) 360-372
Following the work of Kieffer and Titus (2001, Icarus 154, 162–180), we present results of thermal IR observations of Korolev crater, located at ∼73°">∼73° latitude in the martian northern polar region. Similar to techniques employed by Titus et al. (2003, Science 299, 1048–1050), we...
Utility of Penman-Monteith, Priestley-Taylor, reference evapotranspiration, and pan evaporation methods to estimate pasture evapotranspiration
D. M. Sumner, J.M. Jacobs
2005, Journal of Hydrology (308) 81-104
Actual evapotranspiration (ETa) was measured at 30-min resolution over a 19-month period (September 28, 2000-April 23, 2002) from a nonirrigated pasture site in Florida, USA, using eddy correlation methods. The relative magnitude of measured ETa (about 66% of long-term annual precipitation at the study site) indicates the importance of accurate...
Transient population dynamics: Relations to life history and initial population state
D. N. Koons, J.B. Grand, B. Zinner, R.F. Rockwell
2005, Ecological Modelling (185) 283-297
Most environments are variable and disturbances (e.g., hurricanes, fires) can lead to substantial changes in a population's state (i.e., age, stage, or size distribution). In these situations, the long-term (i.e., asymptotic) measure of population growth rate (??1) may inaccurately represent population growth in the short-term. Thus, we calculated the short-term...
Aeolian processes at the Mars Exploration Rover Meridiani Planum landing site
R. Sullivan, D. Banfield, J.F. Bell III, W. Calvin, D. Fike, M. Golombek, R. Greeley, J. Grotzinger, Kenneth E. Herkenhoff, D. Jerolmack, M. Malin, D. Ming, Laurence A. Soderblom, S. W. Squyres, S. Thompson, W.A. Watters, C.M. Weitz, A. Yen
2005, Nature (436) 58-61
The martian surface is a natural laboratory for testing our understanding of the physics of aeolian (wind-related) processes in an environment different from that of Earth. Martian surface markings and atmospheric opacity are time-variable, indicating that fine particles at the surface are mobilized regularly by wind. Regolith (unconsolidated surface material)...
Development of a bioenergetics model for humpback chub and evaluation of water temperature changes in the Grand Canyon, Colorado River
J.H. Petersen, C.P. Paukert
2005, Transactions of the American Fisheries Society (134) 960-974
The construction of Glen Canyon Dam above the Grand Canyon (Arizona) has reduced the water temperature in the Colorado River and altered the growth rate and feeding patterns of the federally endangered humpback chub Gila cypha. A bioenergetics model for humpback chub was developed and used to examine how warmer...
Fundamental challenges to methane recovery from gas hydrates
P. Servio, M.W. Eaton, D. Mahajan, W.J. Winters
2005, Topics in Catalysis (32) 101-107
The fundamental challenges, the location, magnitude, and feasibility of recovery, which must be addressed to recover methane from dispersed hydrate sources, are presented. To induce dissociation of gas hydrate prior to methane recovery, two potential methods are typically considered. Because thermal stimulation requires a large energy input, it is less...
Concentrations of cadmium, lead, and zinc in fish from mining-influenced waters of northeastern Oklahoma: Sampling of blood, carcass, and liver for aquatic biomonitoring
W. G. Brumbaugh, C. J. Schmitt, T.W. May
2005, Archives of Environmental Contamination and Toxicology (49) 76-88
The Tri-States Mining District (TSMD) of Missouri (MO), Kansas (KS), and Oklahoma (OK), USA, was mined for lead (Pb) and zinc (Zn) for more than a century. Mining ceased more than 30 years ago, but wastes remain widely distributed in the region, and there is evidence of surface- and groundwater...
Climatic and topographic controls on the style and timing of Late Quaternary glaciation throughout Tibet and the Himalaya defined by 10Be cosmogenic radionuclide surface exposure dating
L.A. Owen, R.C. Finkel, P.L. Barnard, Ma Haizhou, K. Asahi, M.W. Caffee, E. Derbyshire
2005, Quaternary Science Reviews (24) 1391-1411
Temporal and spatial changes in glacier cover throughout the Late Quaternary in Tibet and the bordering mountains are poorly defined because of the inaccessibility and vastness of the region, and the lack of numerical dating. To help reconstruct the timing and extent of glaciation throughout Tibet and the bordering mountains,...
AVO for one- and two-fracture set models
Chen Hao, R.L. Brown, J.P. Castagna
2005, Geophysics (70)
A theoretical comparison is made of PP and PS angle-dependent reflection coefficients at the top of two fractured-reservoir models using exact, general, anisotropic reflection coefficients. The two vertical-fracture models are taken to have the same total crack density. The primary issue investigated is determination of the fracture orientation using azimuthal...
Testing the generality of a trophic-cascade model for plague
S.K. Collinge, W.C. Johnson, C. Ray, R. Matchett, J. Grensten, J.F. Cully Jr., K.L. Gage, M.Y. Kosoy, J.E. Loye, A.P. Martin
2005, EcoHealth (2) 102-112
Climate may affect the dynamics of infectious diseases by shifting pathogen, vector, or host species abundance, population dynamics, or community interactions. Black-tailed prairie dogs (Cynomys ludovicianus) are highly susceptible to plague, yet little is known about factors that influence the dynamics of plague epizootics in prairie dogs. We investigated temporal...
The fundamental thermal niche of adult landlocked striped bass
P.W. Bettoli
2005, Transactions of the American Fisheries Society (134) 305-314
Researchers have described the temperatures selected by landlocked striped bass Morone saxatilis in different locales throughout the USA. However, seasonally low concentrations of dissolved oxygen (DO) in many systems prevented striped bass from using the cool waters (<22??C) they may have preferred. In Melton Hill Reservoir, a 92-km-long impoundment on...
