Reappearance of deepwater sculpin in Lake Ontario: Resurgence or last gasp of a doomed population?
B.F. Lantry, R. O'Gorman, M. G. Walsh, J.M. Casselman, J.A. Hoyle, M.J. Keir, J.R. Lantry
2007, Journal of Great Lakes Research (33) 34-45
Deepwater sculpin (Myoxocephalus thompsonii) were abundant in Lake Ontario in the 1920s and at least common into the 1940s. By the 1960s they were rare and, thereafter, some considered the population extirpated even though a synoptic survey of the lake in 1972 produced three, relatively large (148–165 mm total length,...
Quantitative remote sensing study indicates doubling of coastal erosion rate in past 50 yr along a segment of the Arctic coast of Alaska
J.C. Mars, D.W. Houseknecht
2007, Geology (35) 583-586
A new quantitative coastal land gained-and-lost method uses image analysis of topographic maps and Landsat thematic mapper short-wave infrared data to document accelerated coastal land loss and thermokarst lake expansion and drainage. The data span 1955-2005 along the Beaufort Sea coast north of Teshekpuk Lake in the National Petroleum Reserve...
Formation of mixed Al-Fe colloidal sorbent and dissolved-colloidal partitioning of Cu and Zn in the Cement Creek - Animas River Confluence, Silverton, Colorado
Laurence E. Schemel, Briant A. Kimball, Robert L. Runkel, Marisa H. Cox
2007, Applied Geochemistry (22) 1467-1484
Transport and chemical transformations of dissolved and colloidal Al, Fe, Cu and Zn were studied by detailed sampling in the mixing zone downstream from the confluence of Cement Creek (pH 4.1) with the Animas River (pH 7.6). Complete mixing resulted in...
The influence of extractable organic matter on vitrinite reflectance suppression: A survey of kerogen and coal types
C.E. Barker, M. D. Lewan, M. J. Pawlewicz
2007, International Journal of Coal Geology (70) 67-78
The vitrinite reflectance suppression literature shows that while bitumen impregnation of the vitrinite group is often invoked as a significant contributor to suppression, its existence is not often supported by petrological evidence. This study examines bitumen impregnation as a factor in vitrinite suppression by comparing the vitrinite reflectance of source...
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...
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)....
Hydrologic significance of carbon monoxide concentrations in ground water
Francis H. Chapelle, Paul M. Bradley
2007, Ground Water (45) 272-280
Dissolved carbon monoxide (CO) is present in ground water produced from a variety of aquifer systems at concentrations ranging from 0.2 to 20 nanomoles per liter (0.0056 to 0.56 μg/L). In two shallow aquifers, one an unconsolidated coastal plain aquifer in Kings Bay, Georgia, and the other a fractured‐bedrock aquifer...
East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons
R.J. Goldfarb, C. Hart, G. Davis, D. Groves
2007, Economic Geology (102) 341-345
Early Cretaceous orogenic gold deposits in eastern Asia are globally unique in that large Phanerozoic lode gold deposits occur in Archean-Paleoproterozoic cratons. In the northern Pacific region, ca. 125 Ma orogenic gold deposits in the North China, Yangzte, and Siberian craton margins, as well as in young terranes in California,...
New isotopic evidence for the origin of groundwater from the Nubian Sandstone Aquifer in the Negev, Israel
A. Vengosh, S. Hening, J. Ganor, B. Mayer, C.E. Weyhenmeyer, T.D. Bullen, A. Paytan
2007, Applied Geochemistry (22) 1052-1073
The geochemistry and isotopic composition (H, O, S, Osulfate, C, Sr) of groundwater from the Nubian Sandstone (Kurnub Group) aquifer in the Negev, Israel, were investigated in an attempt to reconstruct the origin of the water and solutes, evaluate modes of water–rock interactions, and determine mean residence times of the...
Comparison of diet, reproductive biology, and growth of the pig frog (Rana grylio) from harvested and protected areas of the Florida Everglades
C.A. Ugarte, K.G. Rice, M.A. Donnelly
2007, Copeia 436-448
Distinct differences in body size exist among three Rana grylio populations in areas of the Florida Everglades that differ in frog harvest pressure and hydroperiod. Frogs from two populations are harvested regularly throughout the year, while those in the third are protected from harvest. We compared seasonal and sex differences...
Thiamine and fatty acid content of walleye tissue from three southern U.S. reservoirs
D. C. Honeyfield, C.S. Vandergoot, P.W. Bettoli, J. P. Hinterkopf, J.L. Zajicek
2007, Journal of Aquatic Animal Health (19) 84-93
We determined the thiamine concentration in egg, muscle, and liver tissues of walleyes Sander vitreus and the fatty acid content of walleye eggs from three southern U.S. reservoirs. In two Tennessee reservoirs (Dale Hollow and Center Hill), in which there were alewives Alosa pseudoharengus in the forage base, natural recruitment...
Satellite telemetry and prey sampling reveal contaminant sources to pacific northwest ospreys
J. E. Elliott, C.A. Morrissey, Charles J. Henny, E.R. Inzunza, P. Shaw
2007, Ecological Applications (17) 1223-1233
Migratory behavior can be an important factor in determining contaminant exposure in avian populations. Accumulation of organochlorine (OC) pesticides while birds are wintering in tropical regions has been cited often as the reason for high concentrations in migrant populations. To explore this issue, we satellite tracked 16 Ospreys (Pandion haliaetus)...
Detection ratios on winter surveys of Rocky Mountain Trumpeter Swans Cygnus buccinator
J. Bart, C.D. Mitchell, M.N. Fisher, J.A. Dubovsky
2007, Wildfowl (57) 21-28
We estimated the detection ratio for Rocky Mountain Trumpeter Swans Cygnus buccinator that were counted during aerial surveys made in winter. The standard survey involved counting white or grey birds on snow and ice and thus might be expected to have had low detection ratios. On the other hand, observers...
Cross-calibration of the Terra MODIS, Landsat 7 ETM+ and EO-1 ALI sensors using near-simultaneous surface observation over the Railroad Valley Playa, Nevada, test site
G. Chander, A. Angal, T. Choi, D. J. Meyer, X. Xiong, P.M. Teillet
2007, Conference Paper
A cross-calibration methodology has been developed using coincident image pairs from the Terra Moderate Resolution Imaging Spectroradiometer (MODIS), the Landsat 7 (L7) Enhanced Thematic Mapper Plus (ETM+) and the Earth Observing EO-1 Advanced Land Imager (ALI) to verify the absolute radiometric calibration accuracy of these sensors with respect to each...
Use of eyeballs for establishing ploidy of Asian carp
J.A. Jenkins, R.G. Thomas
2007, North American Journal of Fisheries Management (27) 1195-1202
Grass carp Ctenopharyngodon idella, silver carp Hypophthalmichthys molitrix, and bighead carp H. nobilis are now established and relatively common in the Mississippi and Atchafalaya rivers. Commercial fishers of Louisiana's large rivers report recurrent catches of grass carp, and the frequency of bighead carp and silver carp catch is increasing. Twelve...
Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA)
R.G.M. Spencer, B.A. Pellerin, B.A. Bergamaschi, B.D. Downing, T.E.C. Kraus, D.R. Smart, R.A. Dahlgren, P.J. Hernes
2007, Hydrological Processes (21) 3181-3189
Dissolved organic matter (DOM) concentration and composition in riverine and stream systems are known to vary with hydrological and productivity cycles over the annual and interannual time scales. Rivers are commonly perceived as homogeneous with respect to DOM concentration and composition, particularly under steady flow conditions over short time periods....
Finite-frequency traveltime tomography of San Francisco Bay region crustal velocity structure
F. F. Pollitz
2007, Geophysical Journal International (171) 630-656
Seismic velocity structure of the San Francisco Bay region crust is derived using measurements of finite-frequency traveltimes. A total of 57 801 relative traveltimes are measured by cross-correlation over the frequency range 0.5–1.5 Hz. From these are derived 4862 ‘summary’ traveltimes, which are used to derive 3-D P-wave velocity structure...
Voluminous low δ18O magmas in the late Miocene Heise volcanic field, Idaho: Implications for the fate of Yellowstone hotspot calderas
I.N. Bindeman, Kathryn E. Watts, A.K. Schmitt, Lisa Morgan, Pat Shanks
2007, Geology (35) 1019-1022
We report oxygen isotope compositions of phenocrysts and U-Pb ages of zircons in four large caldera-forming ignimbrites and post-caldera lavas of the Heise volcanic field, a nested caldera complex in the Snake River Plain, that preceded volcanism in Yellowstone. Early eruption of three normal δ18O voluminous ignimbrites with δ18Oquartz =...
Geochemistry of rare earth elements in Permian coals from the Huaibei Coalfield, China
Lingyun Zheng, Gaisheng Liu, C. L. Chou, C. Qi, Y. Zhang
2007, Journal of Asian Earth Sciences (31) 167-176
The rare earth elements (REEs) in coals are important because of: (a) REE patterns can be an indicator of the nature of source rocks of the mineral matter as well as sedimentary environments; (b) REEs abundance in coal may have industrial-significance. In this study, a total of thirty-four samples of...
Postearthquake relaxation and aftershock accumulation linearly related after the 2003 M 6.5 Chengkung, Taiwan, and the 2004 M 6.0 Parkfield, California, earthquakes
J.C. Savage, S.-B. Yu
2007, Bulletin of the Seismological Society of America (97) 1632-1645
We treat both the number of earthquakes and the deformation following a mainshock as the superposition of a steady background accumulation and the postearthquake process. The preseismic displacement and seismicity rates ru and rE are used as estimates of the background rates. Let t be the time after the...
Fate and groundwater impacts of produced water releases at OSPER "B" site, Osage County, Oklahoma
Yousif K. Kharaka, E. Kakouros, James J. Thordsen, Gil Ambats, Marvin M. Abbott
2007, Applied Geochemistry (22) 2164-2176
For the last 5 a, the authors have been investigating the transport, fate, natural attenuation and ecosystem impacts of inorganic and organic compounds in releases of produced water and associated hydrocarbons at the Osage-Skiatook Petroleum Environmental Research (OSPER) “A” and “B” sites,...
Landward and eastward shift of Alaskan polar bear denning associated with recent sea ice changes
Anthony S. Fischbach, Steven C. Amstrup, David C. Douglas
2007, Polar Biology (30) 1395-1405
Polar bears (Ursus maritimus) in the northern Alaska region den in coastal areas and on offshore drifting ice. We evaluated changes in the distribution of polar bear maternal dens between 1985 and 2005, using satellite telemetry. We determined the distribution of maternal dens occupied by 89 satellite collared female polar...
Selection for rapid embryo development correlates with embryo exposure to maternal androgens among passerine birds
H. Schwabl, M.G. Palacios, T. E. Martin
2007, American Naturalist (170) 196-206
Greater offspring predation favors evolution of faster development among species. We hypothesized that greater offspring predation exerts selection on mothers to increase levels of anabolic androgens in egg yolks to achieve faster development. Here, we tested whether (1) concentrations of yolk androgens in passerine species were associated with offspring predation...
Do soil characteristics or microhabitat determine field emergence and success of Bromus tectorum?
B.A. Newingham, P. Vidiella, J. Belnap
2007, Journal of Arid Environments (70) 389-402
In southeastern Utah, Bromus tectorum occurs where Hilaria jamesii is dominant and rarely where Stipa hymenoides/S. comata dominate. To determine whether this distribution is due to soil characteristics or microhabitat, we transplanted H. jamesii soil to a Stipa site and vice versa during a severe drought (2001) and a wetter...
