Social, political, and institutional setting: Water management problems of the Rio Grande
A. J. Douglas
2009, Journal of Water Resources Planning and Management (135) 493-501
This paper discusses various water management issues facing federal, state, and local agencies charged with managing the water resources of the Rio Grande River Basin and its major tributaries. The Rio Grande - 3,058 km (=1,900 mi) long - is the fourth longest river in the United States. The river's...
Possible sources of archaeological maize found in Chaco Canyon and Aztec Ruin, New Mexico
L. V. Benson, J.R. Stein, Howard E. Taylor
2009, Journal of Archaeological Science (36) 387-407
Maize played a major role in Chaco's interaction with outlying communities in the southern Colorado Plateau. This paper seeks to determine where archaeological corn cobs brought to Chaco Canyon were grown. Strontium-isotope and trace-metal ratios of 180 soil-water and 18 surface-water sites in the Southern Colorado Plateau have revealed possible...
Use of dendrochronology and dendrochemistry in environmental forensics: Does it meet the Daubert criteria?
J.-C. Balouet, K.T. Smith, D. Vroblesky, G. Oudijk
2009, Environmental Forensics (10) 268-276
Dendrochronological methods have been in use for more than 100 years, providing us a record of climate, human activities (archaeology), floods, fire, mudslides and other geological and biological events. More recently, dendrochemisty has been used to assess the time frames of the onset and existence of environmental contamination. This article...
In situ video observations of two manefishes (perciformes: Caristiidae) in the mesopelagic zone of the northern Gulf of Mexico
M.C. Benfield, John H. Caruso, K. J. Sulak
2009, Copeia (4) 637-641
This paper describes direct video observations of two manefishes, likely Paracaristius sp., from the mesopelagic waters of the north-central Gulf of Mexico. One fish was observed with a remotely operated vehicle at a depth of 829 m by an industrial ROV as part of the SERPENT Project. The second was...
Rayleigh-wave mode separation by high-resolution linear radon transform
Y. Luo, J. Xia, R. D. Miller, Y. Xu, J. Liu, Q. Liu
2009, Geophysical Journal International (179) 254-264
Multichannel analysis of surface waves (MASW) method is an effective tool for obtaining vertical shear wave profiles from a single non-invasive measurement. One key step of the MASW method is generation of a dispersion image and extraction of a reliable dispersion curve from raw multichannel shot records. Because different Rayleigh-wave...
The puzzle of the 1996 Bárdarbunga, Iceland, earthquake: no volumetric component in the source mechanism
Hrvoje Tkalcic, Douglas S. Dreger, Gillian R. Foulger, Bruce R. Julian
2009, Bulletin of the Seismological Society of America (99) 3077-3085
A volcanic earthquake with Mw 5.6 occurred beneath the Bárdarbunga caldera in Iceland on 29 September 1996. This earthquake is one of a decade-long sequence of events at Bárdarbunga with non-double-couple mechanisms in the Global Centroid Moment Tensor catalog. Fortunately, it was recorded well by the regional-scale...
The Mackenzie River magnetic anomaly, Yukon and Northwest Territories, Canada-Evidence for Early Proterozoic magmatic arc crust at the edge of the North American craton
M. Pilkington, R. W. Saltus
2009, Tectonophysics (478) 78-86
We characterize the nature of the source of the high-amplitude, long-wavelength, Mackenzie River magnetic anomaly (MRA), Yukon and Northwest Territories, Canada, based on magnetic field data collected at three different altitudes: 300 m, 3.5 km and 400 km. The MRA is the largest amplitude (13 nT)...
Response to critique by lucas et al. (2009) of paper by Fassett (2009) documenting Paleocene dinosaurs in the San Juan Basin
J.E. Fassett
2009, Palaeontologia Electronica (12)
In this issue of Palaeontologia Electronica Lucas, et al. (2009) question the validity f the Fassett (2009) paper that presented evidence for Paleocene dinosaurs in the San Juan Basin of New Mexico and Colorado. Their challenges focus primarily on the lithostratigraphy, palynology, and paleomagnetism of the dinosaur-bearing Ojo Alamo Sandstone,...
Geometry of the Nojima fault at Nojima-Hirabayashi, Japan - II. Microstructures and their implications for permeability and strength
Diane E. Moore, D.A. Lockner, H. Ito, R. Ikeda, H. Tanaka, K. Omura
2009, Pure and Applied Geophysics (166) 1669-1691
Samples of damage-zone granodiorite and fault core from two drillholes into the active, strike-slip Nojima fault zone display microstructures and alteration features that explain their measured present-day strengths and permeabilities and provide insight on the evolution of these properties in the fault zone. The least deformed...
Enantiomer fractions of chlordane components in sediment from U.S. Geological Survey sites in lakes and rivers
E.M. Ulrich, W.T. Foreman, P. C. Van Metre, J.T. Wilson, S.A. Rounds
2009, Science of the Total Environment (407) 5884-5893
Spatial, temporal, and sediment-type trends in enantiomer signatures were evaluated for cis- and trans-chlordane (CC, TC) in archived core, suspended, and surficial-sediment samples from six lake, reservoir, and river sites across the United States. The enantiomer fractions (EFs) measured in these samples are in good agreement with those reported for sediment, soil,...
Lysimetric evaluation of simplified surface energy balance approach in the Texas high plains
P.H. Gowda, G.B. Senay, T.A. Howell, T.H. Marek
2009, Applied Engineering in Agriculture (25) 665-669
Numerous energy balance (EB) algorithms have been developed to make use of remote sensing data to estimate evapotranspiration (ET) regionally. However, most EB models are complex to use and efforts are being made to simplify procedures mainly through the scaling of reference ET. The Simplified Surface Energy Balance (SSEB) is...
Multiple spring migration strategies in a population of Pacific Common Eiders
Margaret R. Petersen
2009, Condor (111) 59-70
Spring migration strategies vary within and among species. Examination of this variability extends our understanding of life histories and has implications for conservation. I used satellite transmitters to determine migration strategies and evaluate factors influencing the timing of spring migration of Pacific Common Eiders (Somateria mollissima v-nigrum) that nest along...
A method to assess longitudinal riverine connectivity in tropical streams dominated by migratory biota
K.E. Crook, C. M. Pringle, Mary C. Freeman
2009, Aquatic Conservation: Marine and Freshwater Ecosystems (19) 714-723
1. One way in which dams affect ecosystem function is by altering the distribution and abundance of aquatic species. 2. Previous studies indicate that migratory shrimps have significant effects on ecosystem processes in Puerto Rican streams, but are vulnerable to impediments to upstream or downstream passage, such as dams and...
A biodetrital coral mound complex: Key to early diagenetic processes in the Mississippian Bangor Limestone
D.W. Haywick, D. C. Kopaska-Merkel, M.G. Bersch
2009, Carbonates and Evaporites (24) 77-92
The Bangor Limestone is a Mississippian (Chesterian) shallow marine carbonate formation exposed over a large portion of the Interior Low Plateaus province of northern Alabama. It is dominated by oolitic grainstone and skeletal wackestone and packstone, but in one outcrop near Moulton, Alabama, the Bangor contains a five m thick,...
Morphology of late Quaternary submarine landslides along the U.S. Atlantic continental margin
D.C. Twichell, J.D. Chaytor, Uri S. ten Brink, B. Buczkowski
2009, Marine Geology (264) 4-15
The nearly complete coverage of the U.S. Atlantic continental slope and rise by multibeam bathymetry and backscatter imagery provides an opportunity to reevaluate the distribution of submarine landslides along the margin and reassess the controls on their formation. Landslides can be divided into two categories based on their source areas:...
Females increase reproductive investment in response to helper-mediated improvements in allo-feeding, nest survival, nestling provisioning and post-fledging survival in the Karoo scrub-robin Cercotrichas coryphaeus
P. Lloyd, Taylor W. Andrew, Morne A. du Plessis, T. E. Martin
2009, Journal of Avian Biology (40) 400-411
In many cooperatively-breeding species, the presence of one or more helpers improves the reproductive performance of the breeding pair receiving help. Helper contributions can take many different forms, including allo-feeding, offspring provisioning, and offspring guarding or defence. Yet, most studies have focussed on single forms of helper contribution, particularly offspring...
The δ15N and δ18O values of N2O produced during the co-oxidation of ammonia by methanotrophic bacteria
Kevin W. Mandernack, Christopher T. Mills, Craig A. Johnson, Thomas Rahn, Chad Kinney
2009, Chemical Geology (267) 96-107
In order to determine if the δ15N and δ18O values of N2O produced during co-oxidation of NH4+ by methanotrophic (methane oxidizing) bacteria can be isotopically distinguished from N2O produced either by autotrophic nitrifying or denitrifying bacteria, we conducted laboratory incubation experiments with pure cultures of methanotrophic bacteria that were provided NH4Cl as an...
Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols
D. B. Smith, L. G. Woodruff, R. M. O’Leary, W.F. Cannon, R. G. Garrett, J.E. Kilburn, M. B. Goldhaber
2009, Applied Geochemistry (24) 1357-1368
In 2004, the US Geological Survey (USGS) and the Geological Survey of Canada sampled and chemically analyzed soils along two transects across Canada and the USA in preparation for a planned soil geochemical survey of North America. This effort was a pilot study to test and refine sampling protocols, analytical...
Effects of urbanization on stream water quality in the city of Atlanta, Georgia, USA
N.E. Peters
2009, Hydrological Processes (23) 2860-2878
A long-term stream water quality monitoring network was established in the city of Atlanta, Georgia during 2003 to assess baseline water quality conditions and the effects of urbanization on stream water quality. Routine hydrologically based manual stream sampling, including several concurrent manual point and equal width increment sampling, was conducted...
Sedimentation processes in a coral reef embayment: Hanalei Bay, Kauai
C. D. Storlazzi, M.E. Field, Michael H. Bothner, M.K. Presto, A.E. Draut
2009, Marine Geology (264) 140-151
Oceanographic measurements and sediment samples were collected during the summer of 2006 as part of a multi-year study of coastal circulation and the fate of terrigenous sediment on coral reefs in Hanalei Bay, Kauai. The goal of this study was to better understand sediment dynamics in a coral reef-lined embayment...
A serological survey of infectious disease in Yellowstone National Park's canid community
E.S. Almberg, L.D. Mech, D.W. Smith, J.W. Sheldon, R.L. Crabtree
2009, PLoS ONE (4)
Background: Gray wolves (Canis lupus) were reintroduced into Yellowstone National Park (YNP) after a >70 year absence, and as part of recovery efforts, the population has been closely monitored. In 1999 and 2005, pup survival was significantly reduced, suggestive of disease outbreaks. Methodology/Principal Findings: We analyzed sympatric wolf, coyote (Canis...
Change in diel catchability of young-of-year yellow perch associated with establishment of dreissenid mussels
Martin A. Stapanian, Patrick M. Kocovsky, Jean V. Adams
2009, Freshwater Biology (54) 1593-1604
1. Non-native mussels have increased water clarity in many lakes and streams in North America and Europe. Diel variation in catchability of some fish species has been linked to visibility during survey trawls (used to measure escapement). 2. Water clarity increased in nearshore areas of western Lake Erie by the...
Paleoenvironmental recovery from the Chesapeake Bay bolide impact: The benthic foraminiferal record
C. W. Poag
2009, Special Paper of the Geological Society of America 747-773
The late Eocene Chesapeake Bay bolide impact transformed its offshore target site from an outer neritic, mid-shelf seafloor into a bathyal crater basin. To obtain a depositional record from one of the deepest parts of this basin, the U.S. Geological Survey (USGS) and the International Continental Scientific Drilling Program (ICDP)...
Simulating and understanding sand wave variation: A case study of the Golden Gate sand waves
F. Sterlini, S.J.M.H. Hulscher, D.M. Hanes
2009, Journal of Geophysical Research F: Earth Surface (114)
In this paper we present a detailed comparison between measured features of the Golden Gate sand wave field and the results of a nonlinear sand wave model. Because the Golden Gate sand waves exhibit large variation in their characteristics and in their environmental physics, this area gives us the opportunity...
Helmand river hydrologic studies using ALOS PALSAR InSAR and ENVISAT altimetry
Zhong Lu, J.-W. Kim, H. Lee, C. K. Shum, J. Duan, M. Ibaraki, O. Akyilmaz, C.-H. Read
2009, Marine Geodesy (32) 320-333
The Helmand River wetland represents the only fresh-water resource in southern Afghanistan and one of the least mapped water basins in the world. The relatively narrow wetland consists of mostly marshes surrounded by dry lands. In this study, we demonstrate the use of the Advanced Land Observing Satellite (ALOS) Phased...
