Petroleum prospectivity of the Canada Basin, Arctic Ocean
Arthur Grantz, Patrick E. Hart
2011, Conference Paper, Society of Petroleum Engineers - Arctic Technology Conference 2011
Reconnaissance seismic reflection data indicate that Canada Basin is a >700,000 sq. km. remnant of the Amerasia Basin of the Arctic Ocean that lies south of the Alpha-Mendeleev Large Igneous Province, which was constructed across the northern part of the Amerasia Basin between about 127 and 89–83.5 Ma. Canada Basin...
Age and tectonic setting of the Mesozoic McCoy Mountains Formation in western Arizona, USA
J.E. Spencer, S.M. Richard, G. E. Gehrels, J.D. Gleason, W.R. Dickinson
2011, Geological Society of America Bulletin (123) 1258-1274
The McCoy Mountains Formation consists of Upper Jurassic to Upper Cretaceous siltstone, sandstone, and conglomerate exposed in an east-west–trending belt in southwestern Arizona and southeastern California. At least three different tectonic settings have been proposed for McCoy deposition, and multiple tectonic settings are likely over the ∼80 m.y. age range...
Location and agricultural practices influence spring use of harvested cornfields by cranes and geese in Nebraska
Michael J. Anteau, Mark H. Sherfy, A.A. Bishop
2011, Journal of Wildlife Management (75) 1004-1011
Millions of ducks, geese, and sandhill cranes (Grus canadensis; hereafter cranes) stop in the Central Platte River Valley (CPRV) of Nebraska to store nutrients for migration and reproduction by consuming corn remaining in fields after harvest. We examined factors that influence use of cornfields by cranes and geese (all mid‐continent...
Migrating swarms of brittle-failure earthquakes in the lower crust beneath Mammoth Mountain, California
D.R. Shelly, D.P. Hill
2011, Geophysical Research Letters (38)
Brittle-failure earthquakes in the lower crust, where high pressures and temperatures would typically promote ductile deformation, are relatively rare but occasionally observed beneath active volcanic centers. Where they occur, these earthquakes provide a rare opportunity to observe volcanic processes in the lower crust, such as fluid injection and migration, which...
High-resolution three-dimensional imaging and analysis of rock falls in Yosemite valley, California
Gregory M. Stock, Gerald W. Bawden, J.K. Green, E. Hanson, G. Downing, Brian D. Collins, Sandra Bond, M. Leslar
2011, Geosphere (7) 573-581
We present quantitative analyses of recent large rock falls in Yosemite Valley, California, using integrated high-resolution imaging techniques. Rock falls commonly occur from the glacially sculpted granitic walls of Yosemite Valley, modifying this iconic landscape but also posing significant potential hazards and risks. Two large rock falls occurred from the...
A coral Sr/Ca calibration and replication study of two massive corals from the Gulf of Mexico
Kristine L. DeLong, Jennifer A. Flannery, Christopher R. Maupin, Richard Z. Poore, Terrence M. Quinn
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (307) 117-128
This study examined the variations in the ratio of strontium-to-calcium (Sr/Ca) for two Atlantic corals (Montastraea faveolata and Siderastrea siderea) from the Dry Tortugas National Park (centered on 24.7°N, 82.8°W) in the Gulf of Mexico. Cores from coral colonies in close proximity (10s of meters) and with the same environmental conditions (i.e.,...
Using normalized difference vegetation index to estimate carbon fluxes from small rotationally grazed pastures
R.H. Skinner, B.K. Wylie, T.G. Gilmanov
2011, Agronomy Journal (103) 972-979
Satellite-based normalized difference vegetation index (NDVI) data have been extensively used for estimating gross primary productivity (GPP) and yield of grazing lands throughout the world. However, the usefulness of satellite-based images for monitoring rotationally-grazed pastures in the northeastern United States might be limited because paddock size is often smaller than...
Arctic foxes, lemmings, and canada goose nest survival at cape Churchill, Manitoba
M.E. Reiter, D. E. Andersen
2011, Wilson Journal of Ornithology (123) 266-276
We examined factors influencing Canada Goose (Branta canadensis interior) annual nest success, including the relative abundance of collared lemmings (Dicrostonyx richardsoni), arctic fox (Alopex lagopus) den occupancy, nest density, and spring phenology using data collected during annual Canada Goose breeding area surveys at Cape Churchill, Manitoba. Nest...
Monitoring duration and extent of storm-surge and flooding in Western Coastal Louisiana marshes with Envisat ASAR data
Elijah Ramsey III, Zhong Lu, Yukihiro Suzuoki, Amina Rangoonwala, Dirk Werle
2011, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (4) 387-399
Inundation maps of coastal marshes in western Louisiana were created with multitemporal Envisat Advanced Synthetic Aperture (ASAR) scenes collected before and during the three months after Hurricane Rita landfall in September 2005. Corroborated by inland water-levels, 7 days after landfall, 48% of coastal estuarine and palustrine marshes remained inundated by...
Inter-specific coral chimerism: Genetically distinct multicellular structures associated with tissue loss in Montipora capitata
Thierry M. Work, Zac H. Forsman, Zoltan Szabo, Teresa D. Lewis, Greta S. Aeby, Robert J. Toonen
2011, PLoS ONE (6)
Montipora white syndrome (MWS) results in tissue-loss that is often lethal to Montipora capitata, a major reef building coral that is abundant and dominant in the Hawai'ian Archipelago. Within some MWS-affected colonies in Kane'ohe Bay, Oahu, Hawai'i, we saw unusual motile multicellular structures within gastrovascular canals (hereafter referred to as invasive gastrovascular...
Grassland bird use of oak barrens and dry prairies in Wisconsin
Susan M. Vos, Christine A. Ribic
2011, Natural Areas Journal (31) 26-33
Grassland bird populations have declined more than any other group of birds in North America and are of conservation concern to state and federal agencies. We determined relative abundances of grassland birds in oak barrens and dry sand prairies—native habitat types rare in the state of Wisconsin. We also investigated...
Greater sage-grouse of Grand Teton National Park: where do they roam?
G.W. Chong, W.C. Wetzel, M.J. Holloran
2011, Park Science (27) 42-49
Greater sage-grouse (Centrocercus urophasianus) population declines may be caused by range-wide degradation of sagebrush (woody Artemisia spp.) steppe ecosystems. Understanding how greater sage-grouse use the landscape is essential for successful management. We assessed greater sage-grouse habitat selection on a landscape level in Jackson Hole, Wyoming. We used a Geographic Information...
Whole-edifice ice volume change A.D. 1970 to 2007/2008 at Mount Rainier, Washington, based on LiDAR surveying
T. W. Sisson, J.E. Robinson, D.D. Swinney
2011, Geology (39) 639-642
Net changes in thickness and volume of glacial ice and perennial snow at Mount Rainier, Washington State, have been mapped over the entire edifice by differencing between a highresolution LiDAR (light detection and ranging) topographic survey of September-October 2007/2008 and the 10 m lateral resolution U.S. Geological Survey digital elevation...
Spatial modeling for groundwater arsenic levels in North Carolina
D. Kim, M.L. Miranda, J. Tootoo, P. Bradley, A.E. Gelfand
2011, Environmental Science & Technology (45) 4824-4831
To examine environmental and geologic determinants of arsenic in groundwater, detailed geologic data were integrated with well water arsenic concentration data and well construction data for 471 private wells in Orange County, NC, via a geographic information system. For the statistical analysis, the geologic units were simplified into four generalized...
Using luminescence dating of coarse matrix material to estimate the slip rate of the Astaneh fault, Iran
M. Rizza, Shannon A. Mahan, J.-F. Ritz, H. Nazari, J. Hollingsworth, R. Salamati
2011, Quaternary Geochronology (6) 390-406
In this paper, we present optically and infrared stimulated luminescence (OSL and IRSL) ages for four samples from alluvial fan surfaces in the Astaneh Valley. This valley is located in the north-east part of the Alborz range in Iran. Our morphologic interpretations recognize at least three generations of fans in the study area,...
Spawning habitat selection of hickory shad
Julianne E. Harris, Joseph E. Hightower
2011, North American Journal of Fisheries Management (31) 495-505
We examined the spawning habitat selectivity of hickory shad Alosa mediocris, an anadromous species on the Atlantic coast of North America. Using plankton tows and artificial substrates (spawning pads), we collected hickory shad eggs in the Roanoke River, North Carolina, to identify spawning timing, temperature, and microhabitat use. Hickory shad eggs...
What is the role of fresh groundwater and recirculated seawater in conveying nutrients to the coastal ocean?
Yishai Weinstein, Yoseph Yechieli, Yehuda Shalem, William C. Burnett, Peter W. Swarzenski, Barak Herut
2011, Environmental Science and Technology (45) 5195-5200
Submarine groundwater discharge (SGD) is a major process operating at the land-sea interface. Quantifying the SGD nutrient loads and the marine/terrestrial controls of this transport is of high importance, especially in oligotrophic seas such as the eastern Mediterranean. The fluxes of nutrients in groundwater discharging from the seafloor at Dor...
Sibship reconstruction for inferring mating systems, dispersal and effective population size in headwater brook trout (Salvelinus fontinalis) populations
Yoichiro Kanno, Jason C. Vokoun, Benjamin H. Letcher
2011, Conservation Genetics (12) 619-628
Brook trout Salvelinus fontinalis populations have declined in much of the native range in eastern North America and populations are typically relegated to small headwater streams in Connecticut, USA. We used sibship reconstruction to infer mating systems, dispersal and effective population size of resident (non-anadromous) brook trout in two...
Raman spectroscopic measurements of CO2 density: Experimental calibration with high-pressure optical cell (HPOC) and fused silica capillary capsule (FSCC) with application to fluid inclusion observations
X. Wang, I-Ming Chou, W. Hu, Robert Burruss, Q. Sun, Y. Song
2011, Geochimica et Cosmochimica Acta (75) 4080-4093
Raman spectroscopy is a powerful method for the determination of CO2 densities in fluid inclusions, especially for those with small size and/or low fluid density. The relationship between CO2 Fermi diad split (Δ, cm−1) and CO2 density (ρ, g/cm3) has been documented by several previous studies. However, significant discrepancies exist among these...
Terrestrial source to deep-sea sink sediment budgets at high and low sea levels: Insights from tectonically active Southern California
J.A. Covault, B.W. Romans, S.A. Graham, A. Fildani, G.E. Hilley
2011, Geology (39) 619-622
Sediment routing from terrestrial source areas to the deep sea influences landscapes and seascapes and supply and filling of sedimentary basins. However, a comprehensive assessment of land-to-deep-sea sediment budgets over millennia with significant climate change is lacking. We provide source to sink sediment budgets using cosmogenic radionuclide–derived terrestrial denudation rates...
Structure of the San Fernando Valley region, California: implications for seismic hazard and tectonic history
V.E. Langenheim, T. L. Wright, D. A. Okaya, R.S. Yeats, G. S. Fuis, K. Thygesen, H. Thybo
2011, Geosphere (7) 528-572
Industry seismic reflection data, oil test well data, interpretation of gravity and magnetic data, and seismic refraction deep-crustal profiles provide new perspectives on the subsurface geology of San Fernando Valley, home of two of the most recent damaging earthquakes in southern California. Seismic reflection data provide depths to Miocene–Quaternary horizons;...
Characterizing fragmentation of the collective forests in southern China from multitemporal Landsat imagery: A case study from Kecheng district of Zhejiang province
M. Li, Z. Zhu, James E. Vogelmann, D. Xu, W. Wen, A. Liu
2011, Applied Geography (31) 1026-1035
Tropical and subtropical forests provide important ecosystem goods and services including carbon sequestration and biodiversity conservation. These forests are facing increasing socioeconomic pressures and are rapidly being degraded and fragmented. This analysis focuses on the rate of change and patterns of fragmentation in a collective forest area in Zhejiang province,...
Unravelling long-term vegetation change patterns in a binational watershed using multitemporal land cover data and historical photography
M.L. Villarreal, Laura M. Norman, Robert Webb, Diane E. Boyer, R.E. Turner
2011, Conference Paper, 2011 6th International Workshop on the Analysis of Multi-Temporal Remote Sensing Images, Multi-Temp 2011 - Proceedings
A significant amount of research conducted in the Sonoran Desert of North America has documented, both anecdotally and empirically, major vegetation changes over the past century due to human land use activities. However, many studies lack coincidental landscape-scale data characterizing the spatial and temporal manifestation of these changes. Vegetation changes...
Impacts of changing food webs in Lake Ontario: Implications of dietary fatty acids on growth of alewives
R.J. Snyder, C.J. Demarche, D. C. Honeyfield
2011, Aquatic Ecosystem Health & Management (14) 231-238
Declines in the abundance and condition of Great Lakes Alewives have been reported periodically during the last two decades, and the reasons for these declines remain unclear. To better understand how food web changes may influence Alewife growth and Wisconsin growth model predictions, we fed Alewives isocaloric diets high in...
Characterizing land surface change and levee stability in the Sacramento-San Joaquin Delta using UAVSAR radar imagery
C. Jones, G. Bawden, S. Deverel, J. Dudas, S. Hensley
2011, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
The islands of the Sacramento-San Joaquin Delta have been subject to subsidence since they were first reclaimed from the estuary marshlands starting over 100 years ago, with most of the land currently lying below mean sea level. This area, which is the primary water resource of the state of California,...
