PVTx properties of the CO2-H2O and CO2-H2O-NaCl systems below 647 K: assessment of experimental data and thermodynamic models
Jiawen Hu, Zhenhao Duan, Chen Zhu, I.-M. Chou
2007, Chemical Geology (238) 249-267
Evaluation of CO2 sequestration in formation brine or in seawater needs highly accurate experimental data or models of pressure–volume–temperature-composition (PVTx) properties for the CO2–H2O and CO2–H2O–NaCl systems. This paper presents a comprehensive review of the experimental PVTx properties and the thermodynamic models of these two systems. The following conclusions are drawn from the...
Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA
P.C. Palmer, M. W. Gannett, S.R. Hinkle
2007, Journal of Hydrology (336) 17-29
Stable isotope (??D and ??18O) signatures of three principal groundwater recharge areas in the 21,000-km2 upper Klamath Basin are used to infer recharge sources for aquifers in the interior parts of the basin. Two of the principal recharge areas, the Cascade Range on the western and southern margin of the...
The National Elevation Dataset
D.B. Gesch
D. Maune, editor(s)
2007, Book chapter, Digital elevation model technologies and applications—the DEM users manual
No abstract available....
Recent climate trends and implications for water resources in the Catskill Mountain region, New York, USA
Douglas A. Burns, Julian Klaus, Michael R. McHale
2007, Journal of Hydrology (336) 155-170
Climate scientists have concluded that the earth’s surface air temperature warmed by 0.6 °C during the 20th century, and that warming induced by increasing concentrations of greenhouse gases is likely to continue in the 21st century, accompanied by changes in the hydrologic cycle. Climate change has important implications in the Catskill...
Return to the wild: Translocation as a tool in conservation of the desert tortoise (Gopherus agassizii)
K.J. Field, C.R. Tracy, P.A. Medica, R.W. Marlow, P.S. Corn
2007, Biological Conservation (136) 232-245
Translocation could be used as a tool in conservation of the threatened Mojave Desert Tortoise (Gopherus agassizii) by moving individuals from harm's way and into areas where they could contribute to conservation of the species. Numerous factors may affect the success of translocations, including the conditions experienced by tortoises in...
Biological uptake of polychlorinated biphenyls by Macoma balthica from sediment amended with activated carbon
Pamela B. McLeod, Martine J. van den Heuvel-Greve, S. N. Luoma, R.G. Luthy
2007, Environmental Toxicology and Chemistry (26) 980-987
This work characterizes the efficacy of activated carbon amendment in reducing polychlorinated biphenyl (PCB) bioavailability to clams (Macoma balthica) from field-contaminated sediment (Hunters Point Naval Shipyard, San Francisco Bay, CA, USA). Test methods were developed for the use of clams to investigate the effects of...
Comparison of four approaches to a rock facies classification problem
M.K. Dubois, Geoffrey C. Bohling, S. Chakrabarti
2007, Computers & Geosciences (33) 599-617
In this study, seven classifiers based on four different approaches were tested in a rock facies classification problem: classical parametric methods using Bayes' rule, and non-parametric methods using fuzzy logic, k-nearest neighbor, and feed forward-back propagating artificial neural network. Determining the most effective classifier for geologic facies prediction in wells...
Hierarchical spatiotemporal matrix models for characterizing invasions
M.B. Hooten, C. K. Wikle, R.M. Dorazio, J. Andrew Royle
2007, Biometrics (63)
The growth and dispersal of biotic organisms is an important subject in ecology. Ecologists are able to accurately describe survival and fecundity in plant and animal populations and have developed quantitative approaches to study the dynamics of dispersal and population size. Of particular interest are the dynamics of invasive species....
Mycobacterial infections in striped bass from Delaware Bay
C. A. Ottinger, J.J. Brown, Christine L. Densmore, C. E. Starliper, V. S. Blazer, H.S. Weyers, K.A. Beauchamp, M. W. Rhodes, H. Kator, David T. Gauthier, W. K. Vogelbein
2007, Journal of Aquatic Animal Health (19) 99-108
Eighty striped bass Morone saxatilis were obtained from Delaware Bay using commercial gill nets set adjacent to Woodland Beach (n = 70) and Bowers Beach (n = 10) in December 2003. Fish were examined for gross lesions. Total lengths (TLs) and eviscerated weights were determined to calculate condition factors (K)....
Appropriate postfire management for the 2007 Griffith park Fire
Jon E. Keeley
2007, Newsletter of the Los Angeles & San Gabriel Rivers Watershed Council (11) 3-5
No abstract available....
Sea otters in a dirty ocean
David A. Jessup, Melissa A. Miller, Christine Kreuder Johnson, Patricia A. Conrad, M. Tim Tinker, James A. Estes, Jonna A.K. Mazet
2007, Journal of the American Veterinary Medical Association (231) 1648-1652
No abstract available....
Subspecific variation in the widespread burl-forming Arctostaphylos glandulosa
Jon E. Keeley, Michael C. Vasey, V. Thomas Parker
2007, Madroño (54) 42-62
The genus Arctostaphylos consists mostly of chaparral shrubs known by the common name manzanita, and one of the widest ranging of these is A. glandulosa Eastw., distributed from Baja California to Oregon. Particularly in the southern half of its range it exhibits complex patterns of morphological variation that have long presented taxonomic challenges. Phenetic...
Thamnophis hammondii foraging behavior
Edward L. Ervin, Robert N. Fisher
2007, Herpetological Review (38) 345-346
Thamnophis hammondii is considered one of the most aquatic of the gartersnakes and is closely associated with creeks and impoundments (Fitch 1940. Univ. California Publ. Zool. 44:1–150) with a diet consisting largely of both the larvae and transformed stages of amphibians (Spea, Bufo, Rana, Pseudacris) and small fish (Oncorhynchus, Gasterosteus,...
Ra and Rn isotopes as natural tracers of submarine groundwater discharge in Tampa Bay, Florida
P.W. Swarzenski, C. Reich, K.D. Kroeger, M. Baskaran
2007, Marine Chemistry (104) 69-84
A suite of naturally occurring radionuclides in the U/Th decay series (222Rn, 223,224,226,228Ra) were studied during wet and dry conditions in Tampa Bay, Florida, to evaluate their utility as groundwater discharge tracers, both within the bay proper and within the Alafia River/estuary — a prominent free-flowing river that empties into...
Fix success and accuracy of GPS radio collars in old-growth temperate coniferous forests
Kimberly A. Sager-Fradkin, Kurt J. Jenkins, Robert L. Hoffman, P. Happe, J. Beecham, R.G. Wright
2007, Journal of Wildlife Management (71) 1298-1308
Global Positioning System (GPS) telemetry is used extensively to study animal distribution and resource selection patterns but is susceptible to biases resulting from data omission and spatial inaccuracies. These data errors may cause misinterpretation of wildlife habitat selection or spatial use patterns. We used both stationary test collars and collared...
A genetic assessment of the recovery units for the mojave population of the desert tortoise, Gopherus agassizii
R. W. Murphy, K.H. Berry, T. Edwards, A.M. McLuckie
2007, Chelonian Conservation and Biology (6) 229-251
In the 1994 Recovery Plan for the Mojave population of the desert tortoise, Gopherus agassizii, the US Fish and Wildlife Service established 6 recovery units by using the best available data on habitat use, behavior, morphology, and genetics. To further assess the validity of the recovery units, we analyzed genetic...
Distribution of light and heavy fractions of soil organic carbon as related to land use and tillage practice
Zhengxi Tan, R. Lal, L. Owens, R. C. Izaurralde
2007, Soil and Tillage Research (92) 53-59
Mass distributions of different soil organic carbon (SOC) fractions are influenced by land use and management. Concentrations of C and N in light- and heavy fractions of bulk soils and aggregates in 0–20 cm were determined to evaluate the role of aggregation in SOC sequestration under conventional tillage (CT), no-till (NT),...
Diel behavior of adult striped bass using tailwater habitat as summer refuge
S.P. Young, J. Jeffery Isely
2007, Transactions of the American Fisheries Society (136) 1104-1112
General patterns of summer diel distribution and movement were identified for adult striped bass Morone saxatilis using tailwater habitat influenced by the diel operation cycle of a hydroelectric dam during the summers of 2003 and 2004. Striped bass distribution within the tailwater was similar during each diel-tracking event and across...
Two new genera of Lumbriculidae (Annelida, Clitellata) from North Carolina, USA
S.V. Fend, D. R. Lenat
2007, Zootaxa 1-22
Recent benthic macroinvertebrate collections from North Carolina contained many undescribed oligochaete taxa, mostly belonging to the family Lumbriculidae. Three of the new species had arrangements of spermathecae and atria previously unreported for the family, and were assigned to new two genera. Pilaridrilus is distinguished by the location of spermathecal pores...
Chromosome painting in the manatee supports Afrotheria and Paenungulata
Margaret E. Kellogg, Sandra Burkett, Thomas R. Dennis, Gary Stone, Brian A. Gray, Peter M. McGuire, Roberto T. Zori, Roscoe Stanyon
2007, BMC Evolutionary Biology (7)
Background Sirenia (manatees, dugongs and Stellar's sea cow) have no evolutionary relationship with other marine mammals, despite similarities in adaptations and body shape. Recent phylogenomic results place Sirenia in Afrotheria and with elephants and rock hyraxes in Paenungulata. Sirenia and Hyracoidea are the two afrotherian orders as...
Increase in nuisance blooms and geographic expansion of the freshwater diatom Didymosphenia geminata
S. A. Spaulding, E. Elwell
2007, Open-File Report 2007-1425
The diatom Didymosphenia geminata (Lyngbye) Schmidt is emerging as an organism with an extraordinary capacity to impact stream ecosystems on a global scale. In recent years, streams in New Zealand, North America, Europe, and Asia have been colonized by unprecedented masses of “didymo” and its extracellular stalks (fig. 1). This...
Red-shouldered hawk occupancy surveys in central Minnesota, USA
C. Henneman, M.A. McLeod, D. E. Andersen
2007, Journal of Wildlife Management (71) 526-533
Forest-dwelling raptors are often difficult to detect because many species occur at low density or are secretive. Broadcasting conspecific vocalizations can increase the probability of detecting forest-dwelling raptors and has been shown to be an effective method for locating raptors and assessing their relative abundance. Recent advances in statistical techniques...
Movements of large snakes (Drymarchon, Masticophis) in north-central Florida
C.K. Dodd Jr., W.J. Barichivich
2007, Florida Scientist (70) 83-94
Abstract not supplied at this time...
Preliminary testing of the role of exercise and predator recognition for bonytail and razorback sucker
Gordon A. Mueller, Jeanette Carpenter, Robert Krapfel, Chester Figiel
2007, Open-File Report 2007-1423
Hatchery-reared juvenile, <25-cm TL (total length), razorback suckers appeared curious and showed no sign of predator avoidance when initially placed with large (>45-cm TL) flathead catfish. Predator-naïve juveniles (20- to 25-cm TL) exhibited no discernable preference when provided areas with and without (52 percent and 48 percent, n = 16...
MT+, integrating magnetotellurics to determine earth structure, physical state, and processes
P. A. Bedrosian
2007, Conference Paper, Surveys in Geophysics
As one of the few deep-earth imaging techniques, magnetotellurics provides information on both the structure and physical state of the crust and upper mantle. Magnetotellurics is sensitive to electrical conductivity, which varies within the earth by many orders of magnitude and is modified by a range of earth processes. As...
