Trends in summer chemistry linked to productivity in lakes recovering from acid deposition in the Adirondack region of New York
B. Momen, G.B. Lawrence, S. A. Nierzwicki-Bauer, J.W. Sutherland, L.W. Eichler, J.P. Harrison, C.W. Boylen
2006, Ecosystems (9) 1306-1317
The US Environmental Protection Agency established the Adirondack Effects Assessment Program (AEAP) to evaluate and monitor the status of biological communities in lakes in the Adirondack region of New York that have been adversely affected by acid deposition. This program includes chemical analysis of 30 lakes, sampled two to three...
Grassland songbirds in a dynamic management landscape: Behavioral responses and management strategies
N.G. Perlut, A.M. Strong, T.M. Donovan, N. J. Buckley
2006, Ecological Applications (16) 2235-2247
In recent decades, earlier and more frequent harvests of agricultural grasslands have been implicated as a major cause of population declines in grassland songbirds. From 2002 to 2005, in the Champlain Valley of Vermont and New York, USA, we studied the reproductive success of Savannah Sparrows (Passerculus sandwichensis) and Bobolinks...
Body-wave traveltime and amplitude shifts from asymptotic travelling wave coupling
F. Pollitz
2006, Geophysical Journal International (167) 705-736
We explore the sensitivity of finite-frequency body-wave traveltimes and amplitudes to perturbations in 3-D seismic velocity structure relative to a spherically symmetric model. Using the approach of coupled travelling wave theory, we consider the effect of a structural perturbation on an isolated portion of the seismogram. By convolving the spectrum...
CO2 sequestration: Storage capacity guideline needed
S.M. Frailey, R.J. Finley, T.S. Hickman
2006, Oil & Gas Journal (104)
Petroleum reserves are classified for the assessment of available supplies by governmental agencies, management of business processes for achieving exploration and production efficiency, and documentation of the value of reserves and resources in financial statements. Up to the present however, the storage capacity determinations made by some organizations in the...
Bedrock formation at Meridiani Planum
S. W. Squyres, O. Aharonson, R. E. Arvidson, J.F. Bell III, P. R. Christensen, B. C. Clark, J.A. Crisp, W. Farrand, T. Glotch, M.P. Golombek, J. Grant, J. Grotzinger, Kenneth E. Herkenhoff, J. R. Johnson, B.L. Jolliff, A.H. Knoll, S. M. McLennan, H.Y. McSween, Johnnie N. Moore, J. W. Rice Jr., N. Tosca
2006, Nature (443) E1-E2
The Mars Exploration Rover Opportunity discovered sulphate-rich sedimentary rocks at Meridiani Planum on Mars, which are interpreted by McCollom and Hynek as altered volcanic rocks. However, their conclusions are derived from an incorrect representation of our depositional model, which is upheld by more recent Rover data. We contend that all the...
The ionospheric impact on GPS performance in southern polar region
C.-K. Hong, D. A. Grejner-Brzezinska, N. Arslan, M. Willis, L. Hothem
2006, Conference Paper, Proceedings of the Institute of Navigation - 19th International Technical Meeting of the Satellite Division, ION GNSS 2006
The primary objective of this paper is to present the results of the study of the effects of varying ionospheric conditions on the GPS signal tracking in the southern polar region. In the first stage of this study, the data collected by the OSU/USGS team in October-November 2003 within the...
Cross-calibration of the Landsat-7 ETM+ and Landsat-5 TM with the ResourceSat-1 (IRS-P6) AWiFS and LISS-III sensors
Gyanesh Chander, Pat Scaramuzza
2006, Conference Paper
Increasingly, data from multiple sensors are used to gain a more complete understanding of land surface processes at a variety of scales. The Landsat suite of satellites has collected the longest continuous archive of multispectral data. The ResourceSat-1 Satellite (also called as IRS-P6) was launched into the polar sunsynchronous orbit...
Evaluation of the persistence of micropollutants through pure-oxygen activated sludge nitrification and denitrification
A.D. Levine, M. T. Meyer, G. Kish
2006, Water Environment Research (78) 2276-2285
The persistence of pharmaceuticals, hormones, and household and industrial chemicals through a pure-oxygen activated sludge, nitrification, denitrification wastewater treatment facility was evaluated. Of the 125 micropollutants that were tested in this study, 55 compounds were detected in the untreated wastewater, and 27 compounds were detected in the disinfected effluent. The...
Slip on the San Andreas fault at Parkfield, California, over two earthquake cycles, and the implications for seismic hazard
J. Murray, J. Langbein
2006, Bulletin of the Seismological Society of America (96)
Parkfield, California, which experienced M 6.0 earthquakes in 1934, 1966, and 2004, is one of the few locales for which geodetic observations span multiple earthquake cycles. We undertake a comprehensive study of deformation over the most recent earthquake cycle and explore the results in the context of geodetic data collected...
Mapping of Titan: Results from the first Titan radar passes
E. R. Stofan, J. I. Lunine, R. Lopes, F. Paganelli, R. D. Lorenz, C. A. Wood, Randolph L. Kirk, S. Wall, C. Elachi, Laurence A. Soderblom, S. Ostro, M. Janssen, J. Radebaugh, L. Wye, H. Zebker, Y. Anderson, M. Allison, R. Boehmer, P. Callahan, P. Encrenaz, E. Flamini, G. Francescetti, Y. Gim, G. Hamilton, S. Hensley, W.T.K. Johnson, K. Kelleher, D. Muhleman, G. Picardi, F. Posa, L. Roth, R. Seu, S. Shaffer, B. Stiles, S. Vetrella, R. West
2006, Icarus (185) 443-456
The first two swaths collected by Cassini's Titan Radar Mapper were obtained in October of 2004 (Ta) and February of 2005 (T3). The Ta swath provides evidence for cryovolcanic processes, the possible occurrence of fluvial channels and lakes, and some tectonic activity. The T3 swath has extensive areas of dunes...
Ecology of an estuarine mysid shrimp in the Columbia River (USA)
C. A. Haskell, J. A. Stanford
2006, River Research and Applications (22) 739-753
The estuarine mysid, Neomysis mercedis, has colonized John Day and other run-of-the-river Reservoirs of the Columbia River, over 400 km from the estuary. In John Day Reservoir N. mercedis numbers peaked (2 m-3) in August in areas near the dam in association with lower water velocity and softer bottom than...
Analogues as a check of predicted drift stability at Yucca Mountain, Nevada
J. S. Stuckless
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Calculations made by the U.S. Department of Energy's Yucca Mountain Project as part of the licensing of a proposed geologic repository in southwestern Nevada for the disposal of high-level radioactive waste, predict that emplacement tunnels will remain open with little collapse long after ground support has disintegrated. This conclusion includes...
Juvenile salmonid use of freshwater emergent wetlands in the floodplain and its implications for conservation management
Julie A. Henning, Robert E. Gresswell, Ian A. Fleming
2006, North American Journal of Fisheries Management (26) 367-376
A recent trend of enhancing freshwater emergent wetlands for waterfowl and other wildlife has raised concern about the effects of such measures on juvenile salmonids. We undertook this study to quantify the degree and extent of juvenile Pacific salmon Oncorhynchus spp. utilization of enhanced and unenhanced emergent wetlands within the...
Occurrence and fate of organic contaminants during onsite wastewater treatment
K.E. Conn, L. B. Barber, G.K. Brown, R.L. Siegrist
2006, Environmental Science & Technology (40) 7358-7366
Onsite wastewater treatment systems serve approximately 25% of the U.S. population. However, little is known regarding the occurrence and fate of organic wastewater contaminants (OWCs), including endocrine disrupting compounds, during onsite treatment. A range of OWCs including surfactant metabolites, steroids, stimulants, metal-chelating agents, disinfectants, antimicrobial agents, and...
Hydroacoustic estimation of zooplankton biomass at two shoal complexes in the Apostle Islands Region of Lake Superior
B.V. Holbrook, T.R. Hrabik, D.K. Branstrator, D.L. Yule, J.D. Stockwell
2006, Journal of Great Lakes Research (32) 680-696
Hydroacoustics can be used to assess zooplankton populations, however, backscatter must be scaled to be biologically meaningful. In this study, we used a general model to correlate site-specific hydroacoustic backscatter with zooplankton dry weight biomass estimated from net tows. The relationship between zooplankton dry weight and backscatter was significant (p...
Environmental contaminants in fish and their associated risk to piscivorous wildlife in the Yukon River Basin, Alaska
J.E. Hinck, C. J. Schmitt, K. R. Echols, T.W. May, C.E. Orazio, D. E. Tillitt
2006, Archives of Environmental Contamination and Toxicology (51) 661-672
Organochlorine chemical residues and elemental contaminants were measured in northern pike (Esox lucius), longnose sucker (Catostomus catostomus), and burbot (Lota lota) from 10 sites in the Yukon River Basin (YRB) during 2002. Contaminant concentrations were compared to historical YRB data and to toxicity thresholds for fish and piscivorous wildlife from...
Inhibition of coral recruitment by macroalgae and cyanobacteria
I. B. Kuffner, L.J. Walters, M.A. Becerro, V.J. Paul, R. Ritson-Williams, K.S. Beach
2006, Marine Ecology Progress Series (323) 107-117
Coral recruitment is a key process in the maintenance and recovery of coral reef ecosystems. While intense competition between coral and algae is often assumed on reefs that have undergone phase shifts from coral to algal dominance, data examining the competitive interactions involved, particularly during the larval and immediate post-settlement...
Does life history predict risk-taking behavior of wintering dabbling ducks?
Joshua T. Ackerman, J.M. Eadie, T.G. Moore
2006, Condor (108) 530-546
Life-history theory predicts that longer-lived, less fecund species should take fewer risks when exposed to predation than shorter-lived, more fecund species. We tested this prediction for seven species of dabbling ducks (Anas) by measuring the approach behavior (behavior of ducks when approaching potential landing sites) of 1099 duck flocks during...
Order from noise: Toward a social theory of geographic information
B.S. Poore, N.R. Chrisman
2006, Annals of the Association of American Geographers (96) 508-523
In the so-called Information Age, it is surprising that the concept of information is imprecisely defined and almost taken for granted. Historic and recent geographic information science (GIScience) literature relies on two conflicting metaphors, often espoused by the same author in adjacent paragraphs. The metaphor of invariance, derived from telecommunications...
The effects of river impoundment and hatchery rearing on the migration behavior of juvenile steelhead in the Lower Snake River, Washington
J.M. Plumb, R.W. Perry, N.S. Adams, D.W. Rondorf
2006, North American Journal of Fisheries Management (26) 438-452
We used radiotelemetry to monitor the migration behavior of juvenile hatchery and wild steelhead Oncorhynchus mykiss as they migrated through Lower Granite Reservoir and Dam on the lower Snake River, Washington. From 1996 to 2001, we surgically implanted radio transmitters in 1,540 hatchery steelhead and 1,346 wild steelhead. For analysis,...
Impact of quaternary climate on seepage at Yucca Mountain, Nevada
J. F. Whelan, J.B. Paces, L.A. Neymark, A.K. Schmitt, M. Grove
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Uranium-series ages, oxygen-isotopic compositions, and uranium contents were determined in outer growth layers of opal and calcitefrom 0.5- to 3-centimeter-thick mineral coatings hosted by lithophysal cavities in the unsaturated zone at Yucca Mountain, Nevada, the proposed site of a permanent repository for high-level radioactive waste. Micrometer-scale growth layering in the...
Importance of spatial autocorrelation in modeling bird distributions at a continental scale
V. Bahn, R.J. O’Connor, W.B. Krohn
2006, Ecography (29) 835-844
Spatial autocorrelation in species' distributions has been recognized as inflating the probability of a type I error in hypotheses tests, causing biases in variable selection, and violating the assumption of independence of error terms in models such as correlation or regression. However, it remains unclear whether these problems occur at...
Evaluating a small footprint, waveform-resolving lidar over coastal vegetation communities
Amar Nayegandhi, John Brock, C. Wayne Wright, M. J. O’Connell
2006, Photogrammetric Engineering and Remote Sensing (72) 1407-1417
NASA’s Experimental Advanced Airborne Research Lidar (EAARL) is a raster-scanning, waveform-resolving, green-wavelength (532 nm) lidar designed to map near-shore bathymetry, topography, and vegetation structure simultaneously. The EAARL sensor records the time history of the return waveform within a small footprint (20 cm diameter) for each laser pulse, enabling characterization of...
Dominance and environmental correlates of alien annual plants in the Mojave Desert, USA
M.L. Brooks, K.H. Berry
2006, Journal of Arid Environments (67) 100-124
Land managers are concerned about the negative effects of alien annual plants on native plants, threatened and endangered species such as the desert tortoise (Gopherus agassizii), and ecosystem integrity in the Mojave Desert. Management of alien plants is hampered by a lack of information regarding the dominance and environmental correlates...
The future of imaging spectroscopy - Prospective technologies and applications
M.E. Schaepman, R.O. Green, S.G. Ungar, B. Curtiss, J. Boardman, A.J. Plaza, B.-C. Gao, S. Ustin, R. Kokaly, J.R. Miller, S. Jacquemoud, E. Ben-Dor, R. Clark, C. Davis, J. Dozier, D.G. Goodenough, D. Roberts, G. Swayze, E.J. Milton, Alexander F.H. Goetz
2006, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
Spectroscopy has existed for more than three centuries now. Nonetheless, significant scientific advances have been achieved. We discuss the history of spectroscopy in relation to emerging technologies and applications. Advanced focal plane arrays, optical design, and intelligent on-board logic are prime prospective technologies. Scalable approaches in pre-processing of imaging spectrometer...
