Mercury speciation in piscivorous fish from mining-impacted reservoirs
James S. Kuwabara, Yuji Arai, Brent R. Topping, I.J. Pickering, G.N. George
2007, Environmental Science & Technology (41) 2745-2749
Guadalupe Reservoir (GUA), California, and Lahontan Reservoir (LAH), Nevada, U.S. are both affected either directly or indirectly by the legacy of gold and silver mining in the Sierra Nevada during the nineteenth century. Analysis of total mercury in fish from these lentic systems consistently indicate elevated concentrations (>1 μg·g-1 wet...
Review of the crevalle jacks, Caranx hippos complex (Teleostei: Carangidae), with a description of a new species from West Africa
W. F. Smith-Vaniz, K.E. Carpenter
2007, Fishery Bulletin (105) 207-233
The Caranx hippos species complex comprises three extant species: crevalle jack (Caranx hippos) (Linnaeus, 1766) from both the western and eastern Atlantic oceans; Pacific crevalle jack (Caranx caninus) Gu??nther, 1868 from the eastern Pacific Ocean; and longfin crevalle jack (Caranx fischeri) new species, from the eastern Atlantic, including the Mediterranean...
Duration of a large Mafic intrusion and heat transfer in the lower crust: A SHRIMP U-Pb zircon Study in the Ivrea-Verbano Zone (Western Alps, Italy)
G. Peressini, J. E. Quick, S. Sinigoi, A.W. Hofmann, M. Fanning
2007, Journal of Petrology (48) 1185-1218
The Ivrea-Verbano Zone in the western Italian Alps contains one of the world's classic examples of ponding of mantle-derived, mafic magma in the deep crust. Within it, a voluminous, composite mafic pluton, the Mafic Complex, intruded lower-crustal, high-grade paragneiss of the Kinzigite Formation during Permian-Carboniferous time, and is now exposed...
Dynamic in-lake spawning migrations by female sockeye salmon
Daniel Young, C.A. Woody
2007, Ecology of Freshwater Fish (16) 155-164
Precise homing by salmon to natal habitats is considered the primary mechanism in the evolution of population-specific traits, yet few studies have focused on this final phase of their spawning migration. We radio tagged 157 female sockeye salmon (Oncorhynchus nerka) as they entered Lake Clark, Alaska, and tracked them every...
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...
The diversity-biomass-productivity relationships in grassland management and restoration
Q. Guo
2007, Basic and Applied Ecology (8) 199-208
Diversity, biomass, and productivity, the three key community/ecosystem variables, are interrelated and pose reciprocal influences on each other. The relationships among the three variables have been a central focus in ecology and formed two schools of fundamentally different nature with two related applications: (1) management - how biomass manipulation (e.g.,...
Arc-parallel extension and fluid flow in an ancient accretionary wedge: The San Juan Islands, Washington
Elizabeth R. Schermer, J.R. Gillaspy, R. Lamb
2007, Geological Society of America Bulletin (119) 753-767
Structural analysis of the Lopez Structural Complex, a major Late Cretaceous terrane-bounding fault zone in the San Juan thrust system, reveals a sequence of events that provides insight into accretionary wedge mechanics and regional tectonics. After formation of regional ductile flattening and shear-related fabrics, the area was crosscut by brittle...
Altered stream-flow regimes and invasive plant species: The Tamarix case
J.C. Stromberg, S.J. Lite, R. Marler, C. Paradzick, P.B. Shafroth, D. Shorrock, J. M. White, M.S. White
2007, Global Ecology and Biogeography (16) 381-393
Aim: To test the hypothesis that anthropogenic alteration of stream-flow regimes is a key driver of compositional shifts from native to introduced riparian plant species. Location: The arid south-western United States; 24 river reaches in the Gila and Lower Colorado drainage basins of Arizona. Methods: We compared the abundance of...
Introduced species and abiotic factors affect longitudinal variation in small fish assemblages in the Wind River watershed, Wyoming
P.S. Lionberger, W.A. Hubert
2007, Journal of Freshwater Ecology (22) 287-295
We assessed longitudinal variation in small fish assemblages in the Wind River watershed upstream from Boysen Reservoir, Wyoming and into the reservoir. Twenty-six species were found in the study area, and 12 of the species were believed to have been introduced since settlement by Europeans. Additions and losses of fish...
Ecological gradients within a Pennsylvanian mire forest
William A. DiMichele, H. J. Falcon-Lang, W.J. Nelson, S.D. Elrick, P.R. Ames
2007, Geology (35) 415-418
Pennsylvanian coals represent remains of the earliest peat-forming rain forests, but there is no current consensus on forest ecology. Localized studies of fossil forests suggest intermixture of taxa (heterogeneity), while, in contrast, coal ball and palynological analyses imply the existence of pronounced ecological gradients. Here, we report the discovery of...
Movement and habitat use of stocked juvenile paddlefish in the Ohio River system, Pennsylvania
P.M. Barry, R.F. Carline, D.G. Argent, William G. Kimmel
2007, North American Journal of Fisheries Management (27) 1316-1325
In 2002 and 2003 we released a total of 66 hatchery-reared, juvenile paddlefish Polyodon spathula (249-318 mm eye-to-fork length) in Pennsylvania's upper Ohio River system and tracked them with radiotelemetry in two different pools of the Ohio and Allegheny rivers to determine (1) poststocking survival, (2) whether release site influences...
Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA: Modeling geochemistry and variable-density flow
Richard M. Yager, William M. Kappel, Niel Plummer
2007, Hydrogeology Journal (15) 1321-1339
Halite brine (saturation ranging from 45 to 80%) lies within glacial sediments that fill the Onondaga Trough, a bedrock valley deepened by Pleistocene glaciation near Syracuse, New York State, USA. The most concentrated brine occupies the northern end of the trough, about 10 km downgradient of the northern limit of...
Genetic characterization of Common Eiders breeding in the Yukon-Kuskokwim Delta, Alaska
Sarah A. Sonsthagen, Sandra L. Talbot, Kevin G. McCracken
2007, The Condor (109) 878-893
We assessed population genetic subdivision among four colonies of Common Eiders (Somateria mollissima v-nigrum) breeding in the Yukon-Kuskokwim Delta (YKD), Alaska, using microsatellite genotypes and DNA sequences with differing modes of inheritance. Significant, albeit low, levels of genetic differentiation were observed between mainland populations and Kigigak Island for nuclear intron lamin A...
Coralline alga reveals first marine record of subarctic North Pacific climate change
J. Halfar, R. Steneck, B. Schone, G.W.K. Moore, M. Joachimski, A. Kronz, J. Fietzke, James A. Estes
2007, Geophysical Research Letters (34)
While recent changes in subarctic North Pacific climate had dramatic effects on ecosystems and fishery yields, past climate dynamics and teleconnection patterns are poorly understood due to the absence of century-long high-resolution marine records. We present the first 117-year long annually resolved marine climate history from the western Bering Sea/Aleutian...
The CEOS constellation for land surface imaging
G. B. Bailey, Marsha Berger, H. Jeanjean, K. P. Gallo
2007, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
A constellation of satellites that routinely and frequently images the Earth's land surface in consistently calibrated wavelengths from the visible through the microwave and in spatial detail that ranges from sub-meter to hundreds of meters would offer enormous potential benefits to society. A well-designed and effectively operated land surface imaging...
Differentiating the Bishop ash bed and related tephra layers by elemental-based similarity coefficients of volcanic glass shards using solution inductively coupled plasma-mass spectrometry (S-ICP-MS)
J.R. Knott, A.M. Sarna-Wojcicki, I.P. Montanez, E. Wan
2007, Quaternary International (166) 79-86
Volcanic glass samples from the same volcanic center (intra-source) often have a similar major-element composition. Thus, it can be difficult to distinguish between individual tephra layers, particularly when using similarity coefficients calculated from electron microprobe major-element measurements. Minor/trace element concentrations in glass...
"Did you feel it?" Intensity data: A surprisingly good measure of earthquake ground motion
G. M. Atkinson, D.J. Wald
2007, Seismological Research Letters (78) 362-368
The U.S. Geological Survey is tapping a vast new source of engineering seismology data through its "Did You Feel It?" (DYFI) program, which collects online citizen responses to earthquakes. To date, more than 750,000 responses have been compiled in the United States alone. The DYFI data make up in quantity...
Food availability affects the maternal transfer of androgens and antibodies into eggs of a colonial seabird
J. Gasparini, T. Boulinier, V.A. Gill, D. Gil, Scott A. Hatch, A. Roulin
2007, Journal of Evolutionary Biology (20) 874-880
Mothers can improve the quality of their offspring by increasing the level of certain components in their eggs. To examine whether or not mothers increase deposition of such components in eggs as a function of food availability, we food‐supplemented black‐legged kittiwake females (Rissa tridactyla) before and during egg laying and...
L-moments and TL-moments of the generalized lambda distribution
W.H. Asquith
2007, Computational Statistics and Data Analysis (51) 4484-4496
The 4-parameter generalized lambda distribution (GLD) is a flexible distribution capable of mimicking the shapes of many distributions and data samples including those with heavy tails. The method of L-moments and the recently developed method of trimmed L-moments (TL-moments) are attractive techniques for parameter estimation for heavy-tailed distributions for which...
Detrital mineral chronology of the Uinta Mountain Group: Implications for the Grenville flood in southwestern Laurentia
P.A. Mueller, D.A. Foster, D.W. Mogk, J. L. Wooden, George D. Kamenov, J.J. Vogl
2007, Geology (35) 431-434
Numerous studies have shown that large quantities of Grenville-age detritus dominate Neoproterozoic to Cambrian arenites in southwest Laurentia (southwestern United States). U-Pb ages and Hf isotopic compositions of zircons and 40Ar/39Ar ages of white mica from clastic sedimentary rocks of the Neoproterozoic Uinta Mountain...
Mapping moderate-scale land-cover over very large geographic areas within a collaborative framework: A case study of the Southwest Regional Gap Analysis Project (SWReGAP)
J. Lowry, R.D. Ramsey, K. Thomas, D. Schrupp, T. Sajwaj, J. Kirby, E. Waller, S. Schrader, S. Falzarano, L. Langs, G. Manis, C. Wallace, K. Schulz, P. Comer, K. Pohs, W. Rieth, C. Velasquez, B. Wolk, W. Kepner, K. Boykin, L. O’Brien, D. Bradford, B. Thompson, J. Prior-Magee
2007, Remote Sensing of Environment (108) 59-73
Land-cover mapping efforts within the USGS Gap Analysis Program have traditionally been state-centered; each state having the responsibility of implementing a project design for the geographic area within their state boundaries. The Southwest Regional Gap Analysis Project (SWReGAP) was the first formal GAP project designed at a regional, multi-state scale....
Isolation of 22 new Haliaeetus microsatellite loci and their characterization in the critically endangered Madagascar fish-eagle (Haliaeetus vociferoides) and three other Haliaeetus eagle species
R.E. Tingay, D.A. Dawson, J. Pandhal, M.L. Clarke, V.A. David, F. Hailer, M. Culver
2007, Molecular Ecology Notes (7) 711-715
We isolated a total of 22 microsatellite loci from two Haliaeetus species: the Madagascar fish-eagle (Haliaeetus vociferoides) and the bald eagle (Haliaeetus leucocephalus). Five loci were monomorphic in both the Madagascar fish-eagle (n = 24-43) and the bald eagle (n = 2-8) but were found to be polymorphic in other...
