The influence of fine-scale habitat features on regional variation in population performance of alpine White-tailed Ptarmigan
B. Fedy, K. Martin
2011, Condor (113) 306-315
It is often assumed (explicitly or implicitly) that animals select habitat features to maximize fitness. However, there is often a mismatch between preferred habitats and indices of individual and population measures of performance. We examined the influence of fine-scale habitat selection on the overall population performance of the White-tailed Ptarmigan...
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...
Stream Centerline for Fanno Creek, Oregon
Steven Sobieszczyk
2011, Report
Fanno Creek is a tributary to the Tualatin River and flows though parts of the southwest Portland metropolitan area. The stream is heavily influenced by urban runoff and shows characteristic flashy streamflow and poor water quality commonly associated with urban streams. This data set represents the stream centerline of the...
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...
Denitrification and inference of nitrogen sources in the karstic Floridan Aquifer
J.B. Heffernan, A.R. Albertin, M.L. Fork, B. G. Katz, M.J. Cohen
2011, Biogeosciences Discussions (8) 10247-10294
Aquifer denitrification is among the most poorly constrained fluxes in global and regional nitrogen budgets. The few direct measurements of denitrification in groundwaters provide limited information about its spatial and temporal variability, particularly at the scale of whole aquifers. Uncertainty in estimates of denitrification may also lead to underestimates of...
Optical maturity variation in lunar spectra as measured by Moon Mineralogy Mapper data
J.W. Nettles, M. Staid, S. Besse, J. Boardman, R. N. Clark, D. Dhingra, P. Isaacson, R. Klima, G. Kramer, C.M. Pieters, L.A. Taylor
2011, Journal of Geophysical Research E: Planets (116)
High spectral and spatial resolution data from the Moon Mineralogy Mapper (M3) instrument on Chandrayaan-1 are used to investigate in detail changes in the optical properties of lunar materials accompanying space weathering. Three spectral parameters were developed and used to quantify spectral effects commonly thought to be associated with increasing...
Feature-based and statistical methods for analyzing the Deepwater Horizon oil spill with AVIRIS imagery
R.S. Rand, R. N. Clark, K.E. Livo
2011, Proceedings of SPIE (8158)
The Deepwater Horizon oil spill covered a very large geographical area in the Gulf of Mexico creating potentially serious environmental impacts on both marine life and the coastal shorelines. Knowing the oil's areal extent and thickness as well as denoting different categories of the oil's physical state is important for...
Water sample locations for Fanno Creek, Oregon
Steven Sobieszczyk
2011, Report
Fanno Creek is a tributary to the Tualatin River and flows though parts of the southwest Portland metropolitan area. The stream is heavily influenced by urban runoff and shows characteristic flashy streamflow and poor water quality commonly associated with urban streams. This data set represents the locations where water-quality samples...
GAGES-II: Geospatial Attributes of Gages for Evaluating Streamflow
James A. Falcone
2011, Report
This dataset, termed "GAGES II", an acronym for Geospatial Attributes of Gages for Evaluating Streamflow, version II, provides geospatial data and classifications for 9,322 stream gages maintained by the U.S. Geological Survey (USGS). It is an update to the original GAGES, which was published as a Data Paper on the...
Estimation of mussel population response to hydrologic alteration in a southeastern U.S. stream
James T. Peterson, J.M. Wisniewski, C.P. Shea, Jackson C. Rhett
2011, Environmental Management (48) 109-122
The southeastern United States has experienced severe, recurrent drought, rapid human population growth, and increasing agricultural irrigation during recent decades, resulting in greater demand for the water resources. During the same time period, freshwater mussels (Unioniformes) in the region have experienced substantial population declines. Consequently, there is growing interest in...
Quantification of a greenhouse hydrologic cycle from equatorial to polar latitudes: The mid-Cretaceous water bearer revisited
M.B. Suarez, Luis A. Gonzalez, Greg A. Ludvigson
2011, Palaeogeography, Palaeoclimatology, Palaeoecology (307) 301-312
This study aims to investigate the global hydrologic cycle during the mid-Cretaceous greenhouse by utilizing the oxygen isotopic composition of pedogenic carbonates (calcite and siderite) as proxies for the oxygen isotopic composition of precipitation. The data set builds on the Aptian–Albian sphaerosiderite δ18O data set presented by Ufnar et...
Spatial connectivity in a highly heterogeneous aquifer: From cores to preferential flow paths
M. Bianchi, C. Zheng, C. Wilson, G.R. Tick, Gaisheng Liu, S.M. Gorelick
2011, Water Resources Research (47)
This study investigates connectivity in a small portion of the extremely heterogeneous aquifer at the Macrodispersion Experiment (MADE) site in Columbus, Mississippi. A total of 19 fully penetrating soil cores were collected from a rectangular grid of 4 m by 4 m. Detailed grain size analysis was performed on 5...
Magma at depth: A retrospective analysis of the 1975 unrest at Mount Baker, Washington, USA
Juliet G. Crider, David Frank, Stephen D. Malone, Michael P. Poland, Cynthia Werner, Jacqueline Caplan-Auerbach
2011, Bulletin of Volcanology (73) 175-189
Mount Baker volcano displayed a short interval of seismically-quiescent thermal unrest in 1975, with high emissions of magmatic gas that slowly waned during the following three decades. The area of snow-free ground in the active crater has not returned to pre-unrest levels, and fumarole gas geochemistry shows a decreasing magmatic...
Approach for environmental baseline water sampling
K. S. Smith
2011, Conference Paper, SME Annual Meeting and Exhibit and CMA 113th National Western Mining Conference 2011
Samples collected during the exploration phase of mining represent baseline conditions at the site. As such, they can be very important in forecasting potential environmental impacts should mining proceed, and can become measurements against which future changes are compared. Constituents in stream water draining mined and mineralized areas tend to...
Formation pressure testing at the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Operational summary, history matching, and interpretations
B. Anderson, S. Hancock, S. Wilson, C. Enger, Timothy S. Collett, R. Boswell, R. Hunter
2011, Marine and Petroleum Geology (28) 478-492
In February 2007, the U.S. Department of Energy, BP Exploration (Alaska), and the U.S. Geological Survey, collected open-hole pressure-response data, as well as gas and water sample collection, in a gas hydrate reservoir (the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well) using Schlumberger's Modular Dynamics Formation Tester (MDT)...
M3 spectral analysis of lunar swirls and the link between optical maturation and surface hydroxyl formation at magnetic anomalies
G.Y. Kramer, S. Besse, D. Dhingra, J. Nettles, R. Klima, I. Garrick-Bethell, Roger N. Clark, J. #NAME? Combe, J. W. Head III, L.A. Taylor, C.M. Pieters, J. Boardman, T. B. McCord
2011, Journal of Geophysical Research E: Planets (116) 1-20
We examined the lunar swirls using data from the Moon Mineralogy Mapper (M3). The improved spectral and spatial resolution of M3 over previous spectral imaging data facilitates distinction of subtle spectral differences, and provides new information about the nature of these enigmatic features. We characterized spectral features of the swirls, interswirl...
Factors influencing reproductive performance of northern bobwhite in South Florida
V. Rolland, J.A. Hostetler, T.C. Hines, H. Franklin Percival, M.K. Oli
2011, European Journal of Wildlife Research (57) 717-727
Reproductive success is a critical component of individual fitness, and also an important determinant of growth rates of populations characterized by early maturity and high fecundity. We used radiotelemetry data collected during 2003–2008 to estimate reproductive parameters in a declining northern bobwhite (Colinus virginianus) population in South Florida, and to...
Understanding interaction effects of climate change and fire management on bird distributions through combined process and habitat models
Joseph D. White, Kevin J. Gutzwiller, Wylie C. Barrow, Lori Johnson-Randall, Lisa Zygo, Pamela Swint
2011, Conservation Biology (25) 536-546
Avian conservation efforts must account for changes in vegetation composition and structure associated with climate change. We modeled vegetation change and the probability of occurrence of birds to project changes in winter bird distributions associated with climate change and fire management in the northern Chihuahuan Desert (southwestern U.S.A.). We simulated...
Nekton community response to a large-scale Mississippi River discharge: Examining spatial and temporal response to river management
Bryan P. Piazza, Megan La Peyre
2011, Estuarine, Coastal and Shelf Science (91) 379-387
Freshwater flow is generally held to be one of the most influential factors affecting community structure and production in estuaries. In coastal Louisiana, the Caernarvon Freshwater Diversion (CFD) is managed to control freshwater discharge from the Mississippi River into Breton Sound basin. Operational since 1991, CFD has undergone several changes...
Modelling detectability of kiore (Rattus exulans) on Aguiguan, Mariana Islands, to inform possible eradication and monitoring efforts
A.A.Y. Adams, J.W. Stanford, A.S. Wiewel, G.H. Rodda
2011, New Zealand Journal of Ecology (35) 145-152
Estimating the detection probability of introduced organisms during the pre-monitoring phase of an eradication effort can be extremely helpful in informing eradication and post-eradication monitoring efforts, but this step is rarely taken. We used data collected during 11 nights of mark-recapture sampling on Aguiguan, Mariana Islands, to estimate introduced kiore...
Fire frequency, area burned, and severity: A quantitative approach to defining a normal fire year
J.A. Lutz, Carl H. Key, C.A. Kolden, J.T. Kane, Jan W. Van Wagtendonk
2011, Fire Ecology (7) 51-65
Fire frequency, area burned, and fire severity are important attributes of a fire regime, but few studies have quantified the interrelationships among them in evaluating a fire year. Although area burned is often used to summarize a fire season, burned area may not be well correlated with either the number...
Solid sample locations for Fanno Creek, Oregon
Steven Sobieszczyk
2011, Report
Fanno Creek is a tributary to the Tualatin River and flows though parts of the southwest Portland metropolitan area. The stream is heavily influenced by urban runoff and shows characteristic flashy streamflow and poor water quality commonly associated with urban streams. This data set represents the locations where solid samples...
Integrating occupancy modeling and interview data for corridor identification: A case study for jaguars in Nicaragua
K.A. Zeller, S. Nijhawan, R. Salom-Perez, S.H. Potosme, James E. Hines
2011, Biological Conservation (144) 892-901
Corridors are critical elements in the long-term conservation of wide-ranging species like the jaguar (Panthera onca). Jaguar corridors across the range of the species were initially identified using a GIS-based least-cost corridor model. However, due to inherent errors in remotely sensed data and model uncertainties, these corridors warrant field verification...
Bed composition generation for morphodynamic modeling: Case study of San Pablo Bay in California, USA
M. van der Wegen, A. Dastgheib, Bruce E. Jaffe, D. Roelvink
2011, Conference Paper
Applications of process-based morphodynamic models are often constrained by limited availability of data on bed composition, which may have a considerable impact on the modeled morphodynamic development. One may even distinguish a period of “morphodynamic spin-up” in which the model generates the bed level according to some ill-defined initial bed...
A Digital Hydrologic Network Supporting NAWQA MRB SPARROW Modeling--MRB_E2RF1
J. W. Brakebill, S.E. Terziotti
2011, Report
A digital hydrologic network was developed to support SPAtially Referenced Regression on Watershed attributes (SPARROW) models within selected regions of the United States. These regions correspond with the U.S. Geological Survey's National Water Quality Assessment (NAWQA) Program Major River Basin (MRB) study units 2, 3, 4, 5, and 7 (Preston...
