Short-Term responses of breeding birds of grassland and early successional habitat to timing of haying in Northwestern Arkansas
J.D. Luscier, W.L. Thompson
2009, Condor (111) 538-544
In 2003, we evaluated nest survival and density of the Dickcissel (Spiza americana), Eastern Meadowlark (Sturnella magna), Field Sparrow (Spizella pusilla), and Red-winged Blackbird (Agelaius phoeniceus) in four unhayed, two early-hayed (26-31 May) and three late-hayed (17-25 June) fields in northwestern Arkansas. Rope dragging and observations revealed 89 nests. Daily...
Geochemistry of yukon and copper river tributaries, Alaska
M. Carney, A. Ellis, T. Bullen, J. Langman
2009, Conference Paper, Proceedings of World Environmental and Water Resources Congress 2009 - World Environmental and Water Resources Congress 2009: Great Rivers
Alaska is already beginning to be affected by changes in global climate which make it a good location to study the feedback effects between climate, the water cycle and the carbon cycle. Using river dissolved elements and Sr isotopes we examine changes and/or differences in chemical weathering between watersheds in...
Nitrogen losses from dairy manure estimated through nitrogen mass balance and chemical markers
Alexander N. Hristov, S. Zaman, M. Vander Pol, P. Ndegwa, L. Campbell, S. Silva
2009, Journal of Environmental Quality (38) 2438-2448
Ammonia is an important air and water pollutant, but the spatial variation in its concentrations presents technical difficulties in accurate determination of ammonia emissions from animal feeding operations. The objectives of this study were to investigate the relationship between ammonia volatilization and ??15N of dairy manure and the feasibility of...
Did the Zipingpu Reservoir trigger the 2008 Wenchuan earthquake?
S. Ge, M. Liu, N. Lu, J. W. Godt, G. Luo
2009, Geophysical Research Letters (36)
The devastating May 2008 Wenchuan earthquake (Mw 7.9) resulted from thrust of the Tibet Plateau on the Longmen Shan fault zone, a consequence of the Indo-Asian continental collision. Many have speculated on the role played by the Zipingpu Reservoir, impounded in 2005 near the epicenter, in triggering the earthquake. This...
Nicotine, acetanilide and urea multi-level2H-,13C- and15N-abundance reference materials for continuous-flow isotope ratio mass spectrometry
A. Schimmelmann, A. Albertino, P.E. Sauer, H. Qi, R. Molinie, F. Mesnard
2009, Rapid Communications in Mass Spectrometry (23) 3513-3521
Accurate determinations of stable isotope ratios require a calibration using at least two reference materials with different isotopic compositions to anchor the isotopic scale and compensate for differences in machine slope. Ideally, the S values of these reference materials should bracket the isotopic range of samples with unknown S values....
Holocene evolution of Apalachicola Bay, Florida
Lisa E. Osterman, David C. Twichell, Richard Z. Poore
2009, Geo-Marine Letters (29) 395-404
A program of geophysical mapping and vibracoring was conducted to better understand the geologic evolution of Apalachicola Bay. Analyses of the geophysical data and sediment cores along with age control provided by 34 AMS 14C dates on marine shells and wood reveal the following history. As sea level rose in the...
Assessment of the "fish tumors or other deformities" beneficial use impairment in brown bullhead (Ameiurus nebulosus): I. Orocutaneous tumors
V. S. Blazer, S.D. Rafferty, P.C. Baumman, S.B. Smith, E.C. Obert
2009, Journal of Great Lakes Research (35) 517-526
The "fish tumor or other deformities" beneficial use impairment (BUI) occurs at 9 of the 12 areas of concern (AOC) on Lake Erie. As point sources are mitigated and remediation occurs, AOC are faced with determining delisting criteria. The lack of standardized analyses for this BUI has confounded that process....
High resolution near-bed observations in winter near Cape Hatteras, North Carolina
M. Martini, B. Armstrong, J.C. Warner
2009, Conference Paper, MTS/IEEE Biloxi - Marine Technology for Our Future: Global and Local Challenges, OCEANS 2009
The U.S. Geological Survey (USGS) Coastal and Marine Science Center in Woods Hole, Massachusetts, is leading an effort to understand the regional sediment dynamics along the coastline of North and South Carolina. As part of the Carolinas Coastal Change Processes Project, a geologic framework study in June of 2008 by...
Spectral distance decay
D. Rocchinl, H. Nagendra, R. Ghate, B.S. Cade
2009, Photogrammetric Engineering and Remote Sensing (75) 1225-1230
Remotely sensed data represents key information for character-izing and estimating biodiversity. Spectral distance among sites has proven to be a powerful approach for detecting species composition variability. Regression analysis of species similarity versus spectral distance may allow us to quantitatively estimate how beta-diversity in species changes with respect to spectral...
Postimpact deposition in the Chesapeake Bay impact structure: Variations in eustasy, compaction, sediment supply, and passive-aggressive tectonism
A.A. Kulpecz, K.G. Miller, J.V. Browning, Lucy E. Edwards, David S. Powars, P.P. McLaughlin Jr., A.D. Harris, M.D. Feigenson
2009, Special Paper of the Geological Society of America 811-837
The Eyreville and Exmore, Virginia, core holes were drilled in the inner basin and annular trough, respectively, of the Chesapeake Bay impact structure, and they allow us to evaluate sequence deposition in an impact crater. We provide new high-resolution geochronologic (<1 Ma) and sequence-stratigraphic interpretations of the Exmore core, identify...
Contamination assessment in microbiological sampling of the Eyreville core, Chesapeake Bay impact structure
A.L. Gronstal, M.A. Voytek, J. D. Kirshtein, Heyde N. M. Von der N. M., M.D. Lowit, C.S. Cockell
2009, Special Paper of the Geological Society of America 951-964
Knowledge of the deep subsurface biosphere is limited due to difficulties in recovering materials. Deep drilling projects provide access to the subsurface; however, contamination introduced during drilling poses a major obstacle in obtaining clean samples. To monitor contamination during the 2005 International Continental Scientific Drilling Program (ICDP)-U.S. Geological Survey (USGS)...
Human-provided waters for desert wildlife: What is the problem?
D.J. Mattson, N. Chambers
2009, Policy Sciences (42) 113-135
Conflict persists in southwestern deserts of the United States over management of human-constructed devices to provide wildlife with water. We appraised decision processes in this case relative to the goal of human dignity and by the standards of civility and common interest outcomes. Our analysis suggested that conflict was scientized,...
Theory, practice, and history in critical GIS: Reports on an AAG panel session
M.W. Wilson, B.S. Poore
2009, Conference Paper, Cartographica
Extending a special session held at the 2008 annual meeting of the Association of American Geographers in Boston, this commentary collection highlights elements of the critical GIS research agenda that are particularly pressing. Responding to a Progress report on critical GIS written by David O'Sullivan in 2006, these six commentaries...
Megascale processes: Natural disasters and human behavior
S. W. Kieffer, P. Barton, W. Chesworth, A. R. Palmer, P. Reitan, E-An Zen
2009, Special Paper of the Geological Society of America 77-86
Megascale geologic processes, such as earthquakes, tsunamis, volcanic eruptions, floods, and meteoritic impacts have occurred intermittently throughout geologic time, and perhaps on several planets. Unlike other catastrophes discussed in this volume, a unique process is unfolding on Earth, one in which humans may be the driving agent of megadisasters. Although...
Use of heat to estimate streambed fluxes during extreme hydrologic events
Jeannie R.B. Barlow, Richard H. Coupe
2009, Water Resources Research (45)
Using heat as a tracer, quantitative estimates of streambed fluxes and the critical stage for flow reversal were calculated for high‐flow events that occurred on the Bogue Phalia (a tributary of the Mississippi River) following the 2005 Hurricanes Katrina and Rita. In June 2005, piezometers were installed in the Bogue...
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,...
Monitoring urban subsidence based on SAR lnterferometric point target analysis
Y. Zhang, Jiahua Zhang, W. Gong, Z. Lu
2009, Acta Geodaetica et Cartographica Sinica (38) 482-493
lnterferometric point target analysis (IPTA) is one of the latest developments in radar interferometric processing. It is achieved by analysis of the interferometric phases of some individual point targets, which are discrete and present temporarily stable backscattering characteristics, in long temporal series of interferometric SAR images. This paper analyzes the...
Characterization of the Helderberg Group as a geologic seal for CO 2 sequestration
J.E. Lewis, R.R. McDowell, K.L. Avary, K.M. Carter
2009, Environmental Geosciences (16) 201-210
The Midwest Regional Carbon Sequestration Partnership recognizes that both the Devonian Oriskany Sandstone and the Silurian Salina Group offer potential for subsurface carbon dioxide storage in northern West Virginia. The Silurian-Devonian Helderberg Group lies stratigraphically between these two units, and consequendy, its potential as a geologic seal must be evaluated....
Behavioral responses of north American Elk to recreational activity
L.M. Naylor, M.J. Wisdom, R.G. Anthony
2009, Journal of Wildlife Management (73) 328-338
Off-road recreation on public lands in North America has increased dramatically in recent years. Wild ungulates are sensitive to human activities, but the effect of off-road recreation, both motorized and nonmotorized, is poorly understood. We measured responses of elk (Cervus elaphus) to recreational disturbance in northeast Oregon, USA, from April...
Classification of CO2 Geologic Storage: Resource and Capacity
S.M. Frailey, R.J. Finley
2009, Conference Paper, Energy Procedia
The use of the term capacity to describe possible geologic storage implies a realistic or likely volume of CO2 to be sequestered. Poor data quantity and quality may lead to very high uncertainty in the storage estimate. Use of the term "storage resource" alleviates the implied certainty of the term...
Constraints on the utility of MnO2 cartridge method for the extraction of radionuclides: A case study using 234Th
M. Baskaran, P.W. Swarzenski, B.A. Biddanda
2009, Geochemistry, Geophysics, Geosystems (10)
[1] Large volume (102-103 L) seawater samples are routinely processed to investigate the partitioning of particle reactive radionuclides and Ra between solution and size-fractionated suspended particulate matter. One of the most frequently used methods to preconcentrate these nuclides from such large volumes involves extraction onto three filter cartridges (a prefilter...
An assessment of African test sites in the context of a global network of quality-assured reference standards
G. Chander, X. Xiong, A. Angal, T. Choi
2009, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
The Committee on Earth Observation Satellites (CEOS) Infrared and Visible Optical Sensors (IVOS) subgroup members established a set of CEOS-endorsed globally distributed reference standard test sites for the postlaunch calibration of space-based optical imaging sensors. This paper discusses the top five African pseudo-invariant sites (Libya 4, Mauritania 1/2, Algeria 3,...
Benthic nutrient sources to hypereutrophic Upper Klamath Lake, Oregon, USA
J.S. Kuwabara, B.R. Topping, D. D. Lynch, J.L. Carter, H.I. Essaid
2009, Environmental Toxicology and Chemistry (28) 516-524
Three collecting trips were coordinated in April, May, and August 2006 to sample the water column and benthos of hypereutrophic Upper Klamath Lake (OR, USA) through the annual cyanophyte bloom of Aphanizomenon flos‐aquae. A pore‐water profiler was designed and fabricated to obtain the first high‐resolution (centimeter‐scale) estimates of the vertical concentration...
The regional and global significance of nitrogen removal in lakes and reservoirs
J. A. Harrison, R.J. Maranger, Richard B. Alexander, A. E. Giblin, P.-A. Jacinthe, Emilio Mayorga, S.P. Seitzinger, D. J. Sobota, W. M. Wollheim
2009, Biogeochemistry (93) 143-157
Human activities have greatly increased the transport of biologically available nitrogen (N) through watersheds to potentially sensitive coastal ecosystems. Lentic water bodies (lakes and reservoirs) have the potential to act as important sinks for this reactive N as it is transported across the landscape because they offer ideal conditions for...
Long-term pair bonds in the Laysan Duck
M.H. Reynolds, J.H. Breeden Jr., M.S. Vekasy, T.M. Ellis
2009, Wilson Journal of Ornithology (121) 187-190
We describe long-term pair bonds in the endangered Laysan Duck (Anas laysanensis), a dabbling duck endemic to the Hawaiian Archipelago. Individually marked birds were identified on Laysan Island between 1998 and 2006 (n = 613 marked adults). We recorded pair bonds while observing marked birds, and documented within and between...
