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Page 1962, results 49026 - 49050

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A sampling design framework for monitoring secretive marshbirds
Douglas H. Johnson, J.P. Gibbs, M. Herzog, S. Lor, N.D. Niemuth, C. A. Ribic, M. Seamans, T.L. Shaffer, W.G. Shriver, S.V. Stehman, W.L. Thompson
2009, Waterbirds (32) 203-215
A framework for a sampling plan for monitoring marshbird populations in the contiguous 48 states is proposed here. The sampling universe is the breeding habitat (i.e. wetlands) potentially used by marshbirds. Selection protocols would be implemented within each of large geographical strata, such as Bird Conservation Regions. Site selection will...
Declines in moose population density at Isle Royle National Park, MI, USA and accompanied changes in landscape patterns
N. R. De Jager, J. Pastor
2009, Landscape Ecology (24) 1389-1403
Ungulate herbivores create patterns of forage availability, plant species composition, and soil fertility as they range across large landscapes and consume large quantities of plant material. Over time, herbivore populations fluctuate, producing great potential for spatio-temporal landscape dynamics. In this study, we extend the spatial and temporal extent of a...
Trace-element record in zircons during exhumation from UHP conditions, North-East Greenland Caledonides
W.C. McClelland, J. A. Gilotti, F.K. Mazdab, J. L. Wooden
2009, European Journal of Mineralogy (21) 1135-1148
Coesite-bearing zircon formed at ultrahigh-pressure (UHP) conditions share general characteristics of eclogite-facies zircon with trace-element signatures characterized by depleted heavy rare earth elements (HREE), lack of an Eu anomaly, and low Th/ U ratios. Trace-element signatures of zircons from the Caledonian UHP terrane in North-East Greenland were used to examine...
Relating groundwater to seasonal wetlands in southeastern Wisconsin, USA
J.D. Skalbeck, D.M. Reed, R. J. Hunt, J.D. Lambert
2009, Hydrogeology Journal (17) 215-228
Historically, drier types of wetlands have been difficult to characterize and are not well researched. Nonetheless, they are considered to reflect the precipitation history with little, if any, regard for possible relation to groundwater. Two seasonal coastal wetland types (wet prairie, sedge meadow) were investigated during three growing seasons at...
Copper isotope fractionation in acid mine drainage
B.E. Kimball, R. Mathur, A.C. Dohnalkova, A.J. Wall, R.L. Runkel, S.L. Brantley
2009, Geochimica et Cosmochimica Acta (73) 1247-1263
We measured the Cu isotopic composition of primary minerals and stream water affected by acid mine drainage in a mineralized watershed (Colorado, USA). The δ65Cu values (based on 65Cu/63Cu) of enargite (δ65Cu = −0.01 ± 0.10‰; 2σ) and chalcopyrite (δ65Cu = 0.16 ± 0.10‰) are within the range of reported values for terrestrial primary Cu sulfides (−1‰ < δ65Cu < 1‰). These mineral...
Geology and geochemistry of the Mammoth breccia pipe, Copper Creek mining district, southeastern Arizona: Evidence for a magmatic-hydrothermal origin
E. D. Anderson, William W. Atkinson Jr., T. Marsh, A. Iriondo
2009, Mineralium Deposita (44) 151-170
The Copper Creek mining district, southeastern Arizona, contains more than 500 mineralized breccia pipes, buried porphyry-style, copper-bearing stockworks, and distal lead-silver veins. The breccia pipes are hosted by the Copper Creek Granodiorite and the Glory Hole volcanic rocks. The unexposed Mammoth breccia pipe, solely recognized by drilling, has a vertical...
Biogeochemical mercury methylation influenced by reservoir eutrophication, Salmon Falls Creek Reservoir, Idaho, USA
J. E. Gray, M.E. Hines
2009, Chemical Geology (258) 157-167
Salmon Falls Creek Reservoir (SFCR) in southern Idaho has been under a mercury (Hg) advisory since 2001 as fish in this reservoir contain elevated concentrations of Hg. Concentrations of total Hg (HgT) and methyl-Hg (MeHg) were measured in reservoir water, bottom sediment, and porewater to examine processes of Hg methylation...
A habitat assessment for Florida panther population expansion into central Florida
C.A. Thatcher, F.T. Van Manen, J. D. Clark
2009, Journal of Mammalogy (90) 918-925
One of the goals of the Florida panther (Puma concolor coryi) recovery plan is to expand panther range north of the Caloosahatchee River in central Florida. Our objective was to evaluate the potential of that region to support panthers. We used a geographic information system and the Mahalanobis distance statistic...
Use of morphometric measurements to differentiate between species and sex of king and clapper rails
Marie Perkins, S.L. King, S.E. Travis, J. Linscombe
2009, Waterbirds (32) 579-584
King Rails (Rallus elegans) and Clapper Rails (Rallus longirostris) are large, secretive waterbirds whose ranges overlap in brackish marshes along the Atlantic and Gulf Coasts. King and Clapper Rails are difficult to separate by physical appearance and there is currently no reliable method to distinguish between the two species. Here,...
Loss of butt-end leg bands on male wild turkeys
Duane R. Diefenbach, Mary Jo Casalena, Michael V. Schiavone, David A. Swanson, Michael Reynolds, Robert C. Boyd, Robert Eriksen, Bryan L. Swift
2009, Journal of Wildlife Management (73) 996-999
We estimated loss of butt-end leg bands on male wild turkeys (Meleagris gallapavo) captured in New York, Ohio, and Pennsylvania (USA) during December–March, 2006–2008. We used aluminum rivet leg bands as permanent marks to estimate loss of regular aluminum, enameled aluminum, anodized aluminum, and stainless steel butt-end leg bands placed...
A prototype feature system for feature retrieval using relationships
J. Choi, E.L. Usery
2009, Cartography and Geographic Information Science (36) 331-345
Using a feature data model, geographic phenomena can be represented effectively by integrating space, theme, and time. This paper extends and implements a feature data model that supports query and visualization of geographic features using their non-spatial and temporal relationships. A prototype feature-oriented geographic information system (FOGIS) is then developed...
Integrated treatment process using a natural Wyoming clinoptilolite for remediating produced waters from coalbed natural gas operations
H. Zhao, G.F. Vance, M.A. Urynowicz, R.W. Gregory
2009, Applied Clay Science (42) 379-385
Coalbed natural gas (CBNG) development in western U.S. states has resulted in an increase in an essential energy resource, but has also resulted in environmental impacts and additional regulatory needs. A concern associated with CBNG development relates to the production of the copious quantities of potentially saline-sodic groundwater required to...
The Meteoritical Bulletin, No. 96, September 2009
M.K. Weisberg, C. Smith, G. Benedix, C.D.K. Herd, K. Righter, H. Haack, A. Yamaguchi, Aoudjehane H. Chennaoui, J. N. Grossman
2009, Meteoritics and Planetary Science (44) 1355-1397
The Meteoritical Bulletin No. 96 contains a total of 1590 newly approved meteorite names with their relevant data. These include 12 from specific locations within Africa, 76 from northwest Africa, 9 from the Americas, 13 from Asia, 1 from Australia, 2 from Europe, 950 from Antarctica recovered by the Chinese...
Impacts of acidification on macroinvertebrate communities in streams of the western Adirondack Mountains, New York, USA
Barry P. Baldigo, G.B. Lawrence, R.W. Bode, H. A. Simonin, K. M. Roy, A. J. Smith
2009, Ecological Indicators (9) 226-239
Limited stream chemistry and macroinvertebrate data indicate that acidic deposition has adversely affected benthic macroinvertebrate assemblages in numerous headwater streams of the western Adirondack Mountains of New York. No studies, however, have quantified the effects that acidic deposition and acidification may have had on resident fish and macroinvertebrate communities in...
An inducible HSP70 gene from the midge Chironomus dilutus: Characterization and transcription profile under environmental stress
N. K. Karouna-Renier, K.R. Rao
2009, Insect Molecular Biology (18) 87-96
In the present study, we identified and characterized an inducible heat shock protein 70 (HSP70) from the midge Chironomus dilutus and investigated the transcriptional profile of the gene under baseline and environmentally stressful conditions. Using real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR), we observed increased expression of CD-HSP70-1 in response...
Effect of dietary α-tocopherol + ascorbic acid, selenium, and iron on oxidative stress in sub-yearling Chinook salmon (Oncorhynchus tshawytscha Walbaum)
T.L. Welker, J.L. Congleton
2009, Journal of Animal Physiology and Animal Nutrition (93) 15-25
A three-variable central composite design coupled with surface-response analysis was used to examine the effects of dietary ??-tocopherol + ascorbic acid (TOCAA), selenium (Se), and iron (Fe) on indices of oxidative stress in juvenile spring Chinook salmon. Each dietary factor was tested at five levels for a total of fifteen...
Evaluation of fast green FCF dye for non-lethal detection of integumental injuries in juvenile Chinook salmon Oncorhynchus tshawytscha
Diane G. Elliott, Carla M. Conway, Lynn M. Applegate
2009, Diseases of Aquatic Organisms (84) 139-150
A rapid staining procedure for detection of recent skin and fin injuries was tested in juvenile Chinook salmon Oncorhynchus tshawytscha. Immersion of anesthetized fish for 1 min in aerated aqueous solutions of the synthetic food dye fast green FCF (Food Green 3) at concentrations of 0.1 to 0.5% produced consistent and...
Geoengineering and seismological aspects of the Niigata-Ken Chuetsu-Oki earthquake of 16 July 2007
R. Kayen, S.J. Brandenberg, B.D. CoIlins, S. Dickenson, S. Ashford, Y. Kawamata, Y. Tanaka, H. Koumoto, N. Abrahamson, L. Cluff, K. Tokimatsu
2009, Earthquake Spectra (25) 777-802
The M6.6 Niigata-Ken Chuetsu-Oki earthquake of 16 July 2007 occurred off the west coast of Japan with a focal depth of 10 km, immediately west of Kashiwazaki City and Kariwa Village in southern Niigata Prefecture. Peak horizontal ground accelerations of 0.68 g were measured in Kashiwazaki City, as well as...
Silicate glasses and sulfide melts in the ICDP-USGS Eyreville B core, Chesapeake Bay impact structure, Virginia, USA
H. E. Belkin, J. Wright Horton Jr.
2009, Special Paper of the Geological Society of America 447-468
Optical and electron-beam petrography of melt-rich suevite and melt-rock clasts from selected samples from the Eyreville B core, Chesapeake Bay impact structure, reveal a variety of silicate glasses and coexisting sulfur-rich melts, now quenched to various sulfi de minerals (??iron). The glasses show a wide variety of textures, fl ow...
Bird population density estimated from acoustic signals
D.K. Dawson, M.G. Efford
2009, Journal of Applied Ecology (46) 1201-1209
Many animal species are detected primarily by sound. Although songs, calls and other sounds are often used for population assessment, as in bird point counts and hydrophone surveys of cetaceans, there are few rigorous methods for estimating population density from acoustic data. 2. The problem has several parts - distinguishing...
Variations of thiaminase I activity pH dependencies among typical Great Lakes forage fish and Paenibacillus thiaminolyticus.
J.L. Zajicek, L. Brown, S.B. Brown, D. C. Honeyfield, J.D. Fitzsimons, D. E. Tillitt
2009, Journal of Aquatic Animal Health (21) 207-216
The source of thiaminase in the Great Lakes food web remains unknown. Biochemical characterization of the thiaminase I activities observed in forage fish was undertaken to provide insights into potential thiaminase sources and to optimize catalytic assay conditions. We measured the thiaminase I activities of crude extracts from five forage...
Geologic columns for the ICDP-USGS Eyreville A and C cores, Chesapeake Bay impact structure: Postimpact sediments, 444 to 0 m depth
Lucy E. Edwards, David S. Powars, J.V. Browning, P.P. McLaughlin Jr., K.G. Miller, Self-Trail J.M., A.A. Kulpecz, T. Elbra
2009, Special Paper of the Geological Society of America 91-114
A 443.9-m-thick, virtually undisturbed section of postimpact deposits in the Chesapeake Bay impact structure was recovered in the Eyreville A and C cores, Northampton County, Virginia, within the "moat" of the structure's central crater. Recovered sediments are mainly fine-grained marine siliciclastics, with the exception of Pleistocene sand, clay, and gravel....
Assessing spatial uncertainty in reservoir characterization for carbon sequestration planning using public well-log data: A case study
E.R. Venteris, K.M. Carter
2009, Environmental Geosciences (16) 211-234
Mapping and characterization of potential geologic reservoirs are key components in planning carbon dioxide (CO2) injection projects. The geometry of target and confining layers is vital to ensure that the injected CO2 remains in a supercritical state and is confined to the target layer. Also, maps of injection volume (porosity)...
Paleomagnetism and environmental magnetism of GLAD800 sediment cores from Bear Lake, Utah and Idaho
C.W. Heil Jr., J.W. King, J. G. Rosenbaum, R. L. Reynolds, Steven M. Colman
2009, Special Paper of the Geological Society of America 291-310
A ???220,000-year record recovered in a 120-m-long sediment core from Bear Lake, Utah and Idaho, provides an opportunity to reconstruct climate change in the Great Basin and compare it with global climate records. Paleomagnetic data exhibit a geomagnetic feature that possibly occurred during the Laschamp excursion (ca. 40 ka). Although...
Petrographic and geochemical comparisons between the lower crystalline basement-derived section and the granite megablock and amphibolite megablock of the Eyreville B core, Chesapeake Bay impact structure, USA
G.N. Townsend, R.L. Gibson, J. Wright Horton Jr., W.U. Reimold, R.T. Schmitt, K. Bartosova
2009, Special Paper of the Geological Society of America 255-275
The Eyreville B core from the Chesapeake Bay impact structure, Virginia, USA, contains a lower basement-derived section (1551.19 m to 1766.32 m deep) and two megablocks of dominantly (1) amphibolite (1376.38 m to 1389.35 m deep) and (2) granite (1095.74 m to 1371.11 m deep), which are separated by an...