Predator avoidance performance of larval fathead minnows (Pimephales promelas) following short-term exposure to estrogen mixtures
M.R. McGee, M.L. Julius, A.M. Vajda, D.O. Norris, L. B. Barber, H.L. Schoenfuss
2009, Aquatic Toxicology (91) 355-361
Aquatic organisms exposed to endocrine disrupting compounds (EDCs) at early life-stages may have reduced reproductive fitness via disruption of reproductive and non-reproductive behavioral and physiological pathways. Survival to reproductive age relies upon optimal non-reproductive trait expression, such as adequate predator avoidance responses, which may be impacted through EDC exposure. During...
A lacustrine record from Lop Nur, Xinjiang, China: Implications for paleoclimate change during Late Pleistocene
L. Chao, P. Zicheng, Y. Dong, L. Weiguo, Z. Zhaofeng, H. Jianfeng, C. Chenlin
2009, Journal of Asian Earth Sciences (34) 38-45
Climate variability during the Late Pleistocene is studied from the proxies in core CK-2 drilled from the Luobei Depression (91??03???E, 40??47???N), Lop Nur in the eastern Tarim Basin, Xinjiang, China. Geophysical and geochemical properties, including magnetic susceptibility, granularity, chroma, carbonate content, loss on ignition and trace elements, have been determined...
Hydraulic anisotropy characterization of pneumatic-fractured sediments using azimuthal self potential gradient
D.N. Wishart, L.D. Slater, D.L. Schnell, G.C. Herman
2009, Journal of Contaminant Hydrology (103) 134-144
The pneumatic fracturing technique is used to enhance the permeability and porosity of tight unconsolidated soils (e.g. clays), thereby improving the effectiveness of remediation treatments. Azimuthal self potential gradient (ASPG) surveys were performed on a compacted, unconsolidated clay block in order to evaluate their potential to delineate contaminant migration pathways...
The role of ridge subduction in determining the geochemistry and Nd–Sr–Pb isotopic evolution of the Kodiak batholith in southern Alaska
Robert A. Ayuso, Peter J. Haeussler, Dwight Bradley, David W. Farris, Nora K. Foley, Gregory A. Wandless
2009, Tectonophysics (464) 137-163
The Paleocene Kodiak batholith, part of the Sanak–Baranof belt of Tertiary near-trench intrusive rocks, forms an elongate body (~ 150 km long) that transects Kodiak Island from SW to NE. The batholith consists of three zones (Southern, Central, and Northern) of kyanite-, muscovite-, and garnet-bearing biotite tonalite and granodiorite and less abundant...
Assessing rates of forest change and fragmentation in Alabama, USA, using the vegetation change tracker model
Mingshi Li, Chengquan Huang, Zhiliang Zhu, Hua Shi, Heng Lu, Shikui Peng
2009, Forest Ecology and Management (257) 1480-1488
Forest change is of great concern for land use decision makers and conservation communities. Quantitative and spatial forest change information is critical for addressing many pressing issues, including global climate change, carbon budgets, and sustainability. In this study, our analysis focuses on the differences in geospatial patterns and their changes...
A comparison of pectoral fin contact between two different wild dolphin populations
K.M. Dudzinski, J.D. Gregg, C. A. Ribic, S.A. Kuczaj
2009, Behavioural Processes (80) 182-190
Contact behaviour involving the pectoral fin has been documented in a number of dolphin species, and various explanations about its function have been offered. Pectoral fin contact can take a variety of forms, and involves a number of body parts and movements, likely differing depending upon social or ecological context....
Shallow radar (SHARAD) sounding observations of the Medusae Fossae Formation, Mars
Lynn M. Carter, Bruce A. Campbell, Thomas R. Watters, Roger J. Phillips, Nathaniel E. Putzig, Ali Safaeinili, Jeffrey J. Plaut, Chris Okubo, Anthony F. Egan, Roberto Seu, Daniela Biccari, Roberto Orosei
2009, Icarus (199) 295-302
The SHARAD (shallow radar) sounding radar on the Mars Reconnaissance Orbiter detects subsurface reflections in the eastern and western parts of the Medusae Fossae Formation (MFF). The radar waves penetrate up to 580 m of the MFF and detect clear subsurface interfaces in two locations: west MFF between 150 and...
Tracking magma volume recovery at Okmok Volcano using GPS and an unscented kalman filter
T. Fournier, Jeffrey T. Freymueller, Peter Cervelli
2009, Journal of Geophysical Research B: Solid Earth (114)
Changes beneath a volcano can be observed through position changes in a GPS network, but distinguishing the source of site motion is not always straightforward. The records of continuous GPS sites provide a favorable data set for tracking magma migration. Dense campaign observations usually provide a better spatial picture...
Threats to Paddlefish habitat: Implications for conservation
Joseph E. Gerken, Craig P. Paukert
2009, American Fisheries Society Symposium (66)
No abstract available....
Environmental and biomedical applications of natural metal stable isotope variations
T.D. Bullen, T. Walczyk
2009, Elements (5) 381-385
etal stable isotopes are now being used to trace metal contaminants in the environment and as indicators of human systemic function where metals play a role. Stable isotope abundance variations provide information about metal sources and the processes affecting metals in complex natural systems, complementing information gained from surrogate tracers,...
Dynamic modeling of nitrogen losses in river networks unravels the coupled effects of hydrological and biogeochemical processes
Richard B. Alexander, J.K. Bohlke, Elizabeth W. Boyer, Mark B. David, Judson W. Harvey, Patrick J. Mulholland, Sybil P. Seitzinger, Craig R. Tobias, Christina Tonitto, Wilfred M. Wollheim
2009, Biogeochemistry (93) 91-116
The importance of lotic systems as sinks for nitrogen inputs is well recognized. A fraction of nitrogen in streamflow is removed to the atmosphere via denitrification with the remainder exported in streamflow as nitrogen loads. At the watershed scale, there is a keen interest in understanding the factors that control...
Arctic lake physical processes and regimes with implications for winter water availability and management in the national petroleum reserve alaska
Benjamin M. Jones, C.D. Arp, Kenneth M. Hinkel, R.A. Beck, Joel A. Schmutz, B. Winston
2009, Environmental Management (43) 1071-1084
Lakes are dominant landforms in the National Petroleum Reserve Alaska (NPRA) as well as important social and ecological resources. Of recent importance is the management of these freshwater ecosystems because lakes deeper than maximum ice thickness provide an important and often sole source of liquid water for aquatic biota, villages,...
Holocene climate on the Modoc Plateau, northern California, USA: The view from Medicine Lake
Scott W. Starratt
2009, Hydrobiologia (631) 197-211
Medicine Lake is a small (165 ha), relatively shallow (average 7.3 m), intermediate elevation (2,036 m) lake located within the summit caldera of Medicine Lake volcano, Siskiyou County, California, USA. Sediment cores and high-resolution bathymetric and seismic reflection data were collected from the lake during the fall of 1999 and 2000. Sediments were...
Effects of fire temperature on the physical and chemical characteristics of the ash from two plots of Cork oak (Quercus Suber)
X. Ubeda, P. Pereira, L. Outeiro, D.A. Martin
2009, Land Degradation and Development (20) 589-608
Cork oak, (Quercus suber) is widely distributed in the Mediterranean region, an area subject to frequent fires. The ash produced by burning can have impacts on the soil status and water resources that can differ according to the temperature reached during fire and the characteristics of the litter, defined as...
Characterization of flux-grown Trace-element-doped titanite using the high-mass-resolution ion microprobe (SHRIMP-RG)
F.K. Mazdab
2009, Canadian Mineralogist (47) 813-831
Crystals of titanite can be readily grown under ambient pressure from a mixture of CaO, TiO2 and SiO2 in the presence of molten sodium tetraborate. The crystals produced are euhedral and prismatic, lustrous and transparent, and up to 5 mm in length. Titanite obtained by this method contains approximately 4300...
Petrogenesis of basaltic volcanic rocks from the Pribilof Islands, Alaska, by melting of metasomatically enriched depleted lithosphere, crystallization differentiation, and magma mixing
J.M. Chang, T.C. Feeley, M.R. Deraps
2009, Journal of Petrology (50) 2249-2286
The Pribilof Islands, Alaska, are located in the Bering Sea in a continental intraplate setting. In this study we examine the petrology and geochemistry of volcanic rocks from St. Paul (0??54-0??003 Ma) and St. George (2??8-1??4 Ma) Islands, the two largest Pribilof Islands. Rocks from St. George can be divided...
A multidisciplinary effort to assign realistic source parameters to models of volcanic ash-cloud transport and dispersion during eruptions
Larry G. Mastin, Marianne C. Guffanti, R. Servranckx, P. Webley, S. Barsotti, K. Dean, A. Durant, John W. Ewert, A. Neri, W.I. Rose, David J. Schneider, Lee Siebert, B. Stunder, G. Swanson, A. Tupper, A. Volentik, Christopher F. Waythomas
2009, Journal of Volcanology and Geothermal Research (186) 10-21
During volcanic eruptions, volcanic ash transport and dispersion models (VATDs) are used to forecast the location and movement of ash clouds over hours to days in order to define hazards to aircraft and to communities downwind. Those models use input parameters, called “eruption source parameters”, such as plume height H,...
Measurement of soil carbon oxidation state and oxidative ratio by 13C nuclear magnetic resonance
W.C. Hockaday, C.A. Masiello, J. T. Randerson, R.J. Smernik, J.A. Baldock, O.A. Chadwick, J.W. Harden
2009, Journal of Geophysical Research G: Biogeosciences (114)
The oxidative ratio (OR) of the net ecosystem carbon balance is the ratio of net O2 and CO2 fluxes resulting from photosynthesis, respiration, decomposition, and other lateral and vertical carbon flows. The OR of the terrestrial biosphere must be well characterized to accurately estimate the terrestrial CO2 sink using atmospheric...
The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents
James C. Hower, Kevin R. Henke, Jennifer M.K. O’Keefe, Mark A. Engle, Donald R. Blake, Glenn B. Stracher
2009, International Journal of Coal Geology (80) 63-67
The Tiptop underground coal-mine fire in the Skyline coalbed of the Middle Pennsylvanian Breathitt Formation was investigated in rural northern Breathitt County, Kentucky, in May 2008 and January 2009, for the purpose of determining the concentrations of carbon dioxide (CO2), carbon monoxide (CO), and mercury (Hg) in the vent and...
Broadening the focus of bat conservation and research in the USA for the 21st century
Theodore J. Weller, Paul M. Cryan, Thomas J. O'Shea
2009, Endangered Species Research (8) 129-145
Appropriately, bat conservation in the USA during the 20th century focused on species that tend to aggregate in large numbers and locations (e.g. maternity roosts, hibernacula) where populations are most vulnerable. Extensive research into habitat needs (primarily for roosting) of reproductive females during the previous 2 decades has produced...
Survival and migration behavior of subyearling Chinook salmon at Lower Granite Dam
A.L. Puls, T.D. Counihan, C. E. Walker, J.M. Hardiman, I.N. Duran
2009, Report
n/a...
Adult chinook salmon passage at Little Goose Dam in relation to spill operations
M.A. Jepson, C.C. Caudill, T.S. Clabough, C.A. Peery, J.W. Beeman, S. Fielding
2009, Report
Spill patterns at Little Goose Dam in 2007 were modified in anticipation of a spillway weir installation intended to improve downstream passage of juvenile salmonids. However, in spill pattern was associated with reduced daily counts of adult salmon passing the dam. Consequently, the behaviors and upstream passage times of radio-tagged...
Cascading effects of fishing on Galapagos rocky reef communities: reanalysis using corrected data
Jorge I. Sonnenholzner, Lydia B. Ladah, Kevin D. Lafferty
2009, Marine Ecology Progress Series (375) 209-218
This article replaces Sonnenholzner et al. (2007; Mar Ecol Prog Ser 343:77–85), which was retracted on September 19, 2007, due to errors in entry of data on sea urchins. We sampled 10 highly fished and 10 (putatively) lightly fished shallow rocky reefs in the southeastern area of the...
Nest site selection by greater sage-grouse in Mono County, California
Eric J. Kolada, James S. Sedinger, Michael L. Casazza
2009, Journal of Wildlife Management (73) 1333-1340
Loss of nesting habitat is believed to be a factor in the decline of greater sage-grouse (Centrocercus urophasianus) throughout its range. Few data are available for sage-grouse in Mono County, California, USA, in the most southwestern portion of the species' range. We studied habitat selection of nesting sage-grouse in Mono...
Pilot study to access the role of Ceratomyxa shasta infection in mortality of fall-run Chinook smolts migrating through the lower Klamath River in 2008
Scott Foott, Greg Stutzer, R. Fogerty, Hal Hansel, Steven Juhnke, John W. Beeman
2009, Report
Apparent survival and migration rate of radio-tagged hatchery subyearling Chinook salmon released at Iron Gate Hatchery was monitored in the Klamath River to see if the timing of mortality coincided with observations of ceratomyxosis in re-captured coded wire tag cohorts. Despite rapid emigration, these relatively large (mean fork length 92...
