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...
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)...
Profiling refined hydrocarbon fuels using polar components
Colleen E. Rostad, Frances D. Hostettler
2007, Environmental Forensics (8) 129-137
Identification of a fuel released into the environment can be difficult due to biodegradation or weathering. Negative electrospray ionization/mass spectrometry was used to screen for unique polar components in a wide variety of commercial hydrocarbon products and mixtures. These fuels produced unique and relatively simple spectra. When applied to hydrocarbon...
Climate correlates of 20 years of trophic changes in a high-elevation riparian system
T. E. Martin
2007, Ecology (88) 367-380
The consequences of climate change for ecosystem structure and function remain largely unknown. Here, I examine the ability of climate variation to explain long-term changes in bird and plant populations, as well as trophic interactions in a high-elevation riparian system in central Arizona, USA, based on 20 years of study....
Bora event variability and the role of air-sea feedback
J. Pullen, J.D. Doyle, T. Haack, C. Dorman, R. P. Signell, C.M. Lee
2007, Journal of Geophysical Research C: Oceans (112)
A two-way interacting high resolution numerical simulation of the Adriatic Sea using the Navy Coastal Ocean Model (NCOM) and Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS??) was conducted to improve forecast momentum and heat flux fields, and to evaluate surface flux field differences for two consecutive bora events during February...
1400 yr multiproxy record of climate variability from the northern Gulf of Mexico
J.N. Richey, R.Z. Poore, B.P. Flower, T. M. Quinn
2007, Geology (35) 423-426
A continuous decadal-scale resolution record of climate variability over the past 1400 yr in the northern Gulf of Mexico was constructed from a box core recovered in the Pigmy Basin, northern Gulf of Mexico. Proxies include paired analyses of Mg/Ca and δ18O in the white variety of the planktic foraminifer...
Sap flow characteristics of neotropical mangroves in flooded and drained soils
Ken W. Krauss, P. Joy Young, Jim L. Chambers, Thomas W. Doyle, Robert R. Twilley
2007, Tree Physiology (27) 775-783
Effects of flooding on water transport in mangroves have previously been investigated in a few studies, most of which were conducted on seedlings in controlled settings. In this study, we used heat-dissipation sap probes to determine if sap flow (Js) attenuates with radial depth into the xylem of mature trees...
Optimizing nest survival and female survival: Consequences of nest site selection for Canada Geese
David A. Miller, J.B. Grand, T.F. Fondell, R. Michael Anthony
2007, Condor (109) 769-780
We examined the relationship between attributes of nest sites used by Canada Geese (Branta canadensis) in the Copper River Delta, Alaska, and patterns in nest and female survival. We aimed to determine whether nest site attributes related to nest and female survival differed and whether nest site attributes related to...
Thermoregulation in larval aggregations of carrion-feeding blow flies (Diptera: Calliphoridae)
D. H. Slone, Susan V. Gruner
2007, Journal of Medical Entomology (44) 516-523
The growth and development of carrion-feeding calliphorid (Diptera Calliphoridae) larvae, or maggots, is of great interest to forensic sciences, especially for estimation of a postmortem interval (PMI). The development rate of calliphorid larvae is influenced by the temperature of their immediate environment. Heat generation in larval feeding aggregations (=maggot masses)...
Massive edifice failure at Aleutian arc volcanoes
Michelle L. Coombs, S.M. White, D.W. Scholl
2007, Earth and Planetary Science Letters (256) 403-418
Along the 450-km-long stretch of the Aleutian volcanic arc from Great Sitkin to Kiska Islands, edifice failure and submarine debris-avalanche deposition have occurred at seven of ten Quaternary volcanic centers. Reconnaissance geologic studies have identified subaerial evidence for large-scale prehistoric collapse events at five of the centers (Great Sitkin, Kanaga,...
Iron- and 4-hydroxy-2-alkylquinoline-containing periplasmic inclusion bodies of Pseudomonas aeruginosa: A chemical analysis
P.W. Royt, R.V. Honeychuck, R.R. Pant, M.L. Rogers, L.V. Asher, J.R. Lloyd, W.E. Carlos, H. E. Belkin, S. Patwardhan
2007, Bioorganic Chemistry (35) 175-188
Dark aggregated particles were seen on pellets of iron-rich, mid-logarithmic phase Pseudomonas aeruginosa. Transmission electron microscopy of these cells showed inclusion bodies in periplasmic vacuoles. Aggregated particles isolated from the spent medium of these cells contained iron as indicated by atomic absorption spectroscopy and by electron paramagnetic resonance spectroscopy that...
Population dynamics and angler exploitation of the unique muskellunge population in Shoepack Lake, Voyageurs National Park, Minnesota
N.K. Frohnauer, C.L. Pierce, L.W. Kallemeyn
2007, North American Journal of Fisheries Management (27) 63-76
A unique population of muskellunge Esox masquinongy inhabits Shoepack Lake in Voyageurs National Park, Minnesota. Little is known about its status, dynamics, and angler exploitation, and there is concern for the long-term viability of this population. We used intensive sampling and mark-recapture methods to quantify abundance, survival, growth, condition, age...
The role of headwater streams in downstream water quality
R. B. Alexander, E.W. Boyer, R. A. Smith, G. E. Schwarz, R. B. Moore
2007, Journal of the American Water Resources Association (43) 41-59
Knowledge of headwater influences on the water-quality and flow conditions of downstream waters is essential to water-resource management at all governmental levels; this includes recent court decisions on the jurisdiction of the Federal Clean Water Act (CWA) over upland areas that contribute to larger downstream water bodies. We review current...
Effects of upland disturbance and instream restoration on hydrodynamics and ammonium uptake in headwater streams
B.J. Roberts, P. J. Mulholland, J.N. Houser
2007, Journal of the North American Benthological Society (26) 38-53
Delivery of water, sediments, nutrients, and organic matter to stream ecosystems is strongly influenced by the catchment of the stream and can be altered greatly by upland soil and vegetation disturbance. At the Fort Benning Military Installation (near Columbus, Georgia), spatial variability in intensity of military training results in a...
The geology of the Morro Velho gold deposit in the Archean Rio das Velhas greenstone belt, Quadrilátero Ferrífero, Brazil
Diogenes Scipioni Vial, Ed DeWitt, Lydia Maria Lobato, Charles H. Thorman
2007, Ore Geology Reviews (32) 511-542
The Morro Velho gold deposit, Quadrilátero Ferrífero region, Minas Gerais, Brazil, is hosted by rocks at the base of the Archean Rio das Velhas greenstone belt. The deposit occurs within a thick carbonaceous phyllite package, containing intercalations of felsic and intermediate volcaniclastic rocks and dolomites. Considering the temporal and spatial...
Investigators share improved understanding of the North American carbon cycle
R.A. Birdsey, R. Cook, S. Denning, P. Griffith, B. Law, J. Masek, A. Michalak, S. Ogle, D. Ojima, Y. Pan, C. Sabine, E. Sheffner, E. Sundquist
2007, Conference Paper, Eos
[No abstract available]...
Power to detect trend in short-term time series of bird abundance
W.E. Thogmartin, B. R. Gray, M. Gallagher, N. Young, J.J. Rohweder, M. G. Knutson
2007, Condor (109) 943-948
Avian point counts for population monitoring are often collected over a short timespan (e.g., 3-5 years). We examined whether power was adequate (power ???0.80) in short-duration studies to warrant the calculation of trend estimates. We modeled power to detect trends in abundance indices of eight bird species occurring across three...
Conditions for coexistence of freshwater mussel species via partitioning of fish host resources
Brenda Rashleigh, D.L. DeAngelis
2007, Ecological Modelling (201) 171-178
Riverine freshwater mussel species can be found in highly diverse communities where many similar species coexist. Mussel species potentially compete for food and space as adults, and for fish host resources during the larval (glochidial) stage. Resource partitioning at the larval stage may promote coexistence. A model of resource utilization...
Habitat characteristics of adult frosted elfins (Callophrys irus) in sandplain communities of southeastern Massachusetts, USA
G. Albanese, P.D. Vickery, P.R. Sievert
2007, Biological Conservation (136) 53-64
Changes to land use and disturbance frequency threaten disturbance-dependent Lepidoptera within sandplain habitats of the northeastern United States. The frosted elfin (Callophrys irus) is a rare and declining monophagous butterfly that is found in xeric open habitats maintained by disturbance. We surveyed potential habitat for adult frosted elfins at four...
The Russell gold deposit, Carolina Slate Belt, North Carolina
T. L. Klein, C. G. Cunningham, M.A.V. Logan, R.R. Seal II
2007, Economic Geology (102) 239-256
Gold deposits have been mined in the Carolina slate belt from the early 1800s to recent times, with most of the production from large mines in South Carolina. The Russell mine, one of the larger producers in North Carolina, is located in the central Uwharrie Mountains, and produced over 470...
Possible refugia in the Alexander Archipelago of southeastern Alaska during the late Wisconsin glaciation
P. E. Carrara, T. A. Ager, J.F. Baichtal
2007, Canadian Journal of Earth Sciences (44) 229-244
The interpretation of the extent of late Wisconsin glaciation in southeastern Alaska has varied between geologists and biologists. Maps and reports of the region prepared by geologists commonly indicated that late Wisconsin ice extended as a large uniform front west to the edge of the continental shelf. However, the distribution...
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,...
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...
Enhancing water cycle measurements for future hydrologic research
H.W. Loescher, J.M. Jacobs, O. Wendroth, D.A. Robinson, G.S. Poulos, K. McGuire, P. Reed, B.P. Mohanty, J. B. Shanley, W. Krajewski
2007, Bulletin of the American Meteorological Society (88) 669-676
The Consortium of Universities for the Advancement of Hydrologic Sciences, Inc., established the Hydrologic Measurement Facility to transform watershed-scale hydrologic research by facilitating access to advanced instrumentation and expertise that would not otherwise be available to individual investigators. We outline a committee-based process that determined which suites of instrumentation best...
Forward model nonlinearity versus inverse model nonlinearity
S. Mehl
2007, Ground Water (45) 791-794
The issue of concern is the impact of forward model nonlinearity on the nonlinearity of the inverse model. The question posed is, "Does increased nonlinearity in the head solution (forward model) always result in increased nonlinearity in the inverse solution (estimation of hydraulic conductivity)?" It is shown that the two...
