Cryovolcanic features on Titan's surface as revealed by the Cassini Titan Radar Mapper
Rosaly Lopes, K. L. Mitchell, Ellen R. Stofan, Jonathan I. Lunine, Ralf D. Lorenz, F. Paganelli, Randolph L. Kirk, C. A. Wood, Stephen D. Wall, L.E. Robshaw, A.D. Fortes, Catherine D. Neish, Jani Radebaugh, E. Reffet, S.J. Ostro, Charles Elachi, M.D. Allison, Y. Anderson, R. Boehmer, G. Boubin, Philip S. Callahan, P. Encrenaz, E. Flamini, G. Francescetti, Y. Gim, G. Hamilton, S. Hensley, Michael A. Janssen, W.T.K. Johnson, K. Kelleher, D.O. Muhleman, G. Ori, R. Orosei, G. Picardi, F. Posa, L.E. Roth, R. Seu, S. Shaffer, Laurence A. Soderblom, B. Stiles, S. Vetrella, R.D. West, L. Wye, H. A. Zebker
2007, Icarus (186) 395-412
The Cassini Titan Radar Mapper obtained Synthetic Aperture Radar images of Titan's surface during four fly-bys during the mission's first year. These images show that Titan's surface is very complex geologically, showing evidence of major planetary geologic processes, including cryovolcanism. This paper discusses the variety of cryovolcanic features identified from...
Multibeam observations of mine burial near Clearwater, FL, including comparisons to predictions of wave-induced burial
M.L. Wolfson, D. F. Naar, P.A. Howd, S. D. Locker, B.T. Donahue, Carl T. Friedrichs, A.C. Trembanis, M. D. Richardson, T.F. Wever
2007, IEEE Journal of Oceanic Engineering (32) 103-118
A Kongsberg Simrad EM 3000 multibeam sonar (Kongsberg Simrad, Kongsberg, Norway) was used to conduct a set of six repeat high-resolution bathymetric surveys west of Indian Rocks Beach (IRB), just to the south of Clearwater, FL, between January and March 2003, to observe in situ scour and burial of instrumented...
Volcanic arc emplacement onto the southernmost Appalachian Laurentian shelf: Characteristics and constraints
J.F. Tull, C.I. Barineau, P.A. Mueller, J. L. Wooden
2007, Geological Society of America Bulletin (119) 261-274
In the southernmost Appalachians, the Hillabee Greenstone, an Ordovician volcanic arc fragment, lies directly atop the outermost Laurentian Devonian–earliest Mississippian(?) shelf sequence at the structural top of the greenschist facies Talladega belt, the frontal metamorphic allochthon along this orogenic segment. The Hillabee Greenstone...
Analysis of pumping‐induced unsaturated regions beneath a perennial river
Grace W. Su, James Jasperse, Donald Seymour, James E. Constantz, Quanlin Zhou
2007, Water Resources Research (43)
The presence of an unsaturated region beneath a streambed during groundwater pumping near streams can reduce the pumping capacity, change flow paths, and alter the types of biological transformations in the streambed sediments. A three‐dimensional, multiphase flow model of two horizontal collector wells along the Russian River near Forestville, California,...
Modeled impact of anthropogenic land cover change on climate
K.L. Findell, E. Shevliakova, P. C. D. Milly, R.J. Stouffer
2007, Journal of Climate (20) 3621-3634
Equilibrium experiments with the Geophysical Fluid Dynamics Laboratory's climate model are used to investigate the impact of anthropogenic land cover change on climate. Regions of altered land cover include large portions of Europe, India, eastern China, and the eastern United States. Smaller areas of change are present in various tropical...
Mangrove recruitment after forest disturbance is facilitated by herbaceous species in the Caribbean
K.L. McKee, J.E. Rooth, Ilka C. Feller
2007, Ecological Applications (17) 1678-1693
Plant communities along tropical coastlines are often affected by natural and human disturbances, but little is known about factors influencing recovery. We focused on mangrove forests, which are among the most threatened ecosystems globally, to examine how facilitation by herbaceous vegetation might improve forest restoration after disturbance. We specifically investigated...
Diversity of terrestrial avifauna in response to distance from the shoreline of the Salton Sea
M.B. Mendelsohn, W.I. Boarman, Robert N. Fisher, S.A. Hathaway
2007, Journal of Arid Environments (68) 574-587
Large aquatic bodies influence surrounding terrestrial ecosystems by providing water and nutrients. In arid landscapes, the increased primary productivity that results may greatly enhance vertebrate biodiversity. The Salton Sea, a large saline lake in the Colorado Desert of southern California, provides nutrients...
An exhumed Late Paleozoic canyon in the rocky mountains
G.S. Soreghan, D.E. Sweet, K.R. Marra, C.F. Eble, M. J. Soreghan, R.D. Elmore, S.A. Kaplan, M.D. Blum
2007, Journal of Geology (115) 473-481
Landscapes are thought to be youthful, particularly those of active orogenic belts. Unaweep Canyon in the Colorado Rocky Mountains, a large gorge drained by two opposite-flowing creeks, is an exception. Its origin has long been enigmatic, but new data indicate that it is an exhumed late Paleozoic landform. Its survival...
Organic contaminants in onsite wastewater treatment systems
K.E. Conn, R.L. Siegrist, L. B. Barber, G.K. Brown
2007, Conference Paper, ASABE - Individual and Small Community Sewage Systems XI, Proceedings of the 11th National Symposium
Wastewater from thirty onsite wastewater treatment systems was sampled during a reconnaissance field study to quantify bulk parameters and the occurrence of organic wastewater contaminants including endocrine disrupting compounds in treatment systems representing a variety of wastewater sources and treatment processes and their receiving environments. Bulk parameters ranged in concentrations...
Sediment compaction rates and subsidence in deltaic plains: Numerical constraints and stratigraphic influences
T.A. Meckel, Uri S. ten Brink, S.J. Williams
2007, Basin Research (19) 19-31
Natural sediment compaction in deltaic plains influences subsidence rates and the evolution of deltaic morphology. Determining compaction rates requires detailed knowledge of subsurface geotechnical properties and depositional history, neither of which is often readily available. To overcome this lack of knowledge, we numerically forward model the incremental sedimentation and compaction...
Olivine friction at the base of oceanic seismogenic zones
M.S. Boettcher, G. Hirth, B. M. Evans
2007, Journal of Geophysical Research B: Solid Earth (112)
We investigate the strength and frictional behavior of olivine aggregates at temperatures and effective confining pressures similar to those at the base of the seismogenic zone on a typical ridge transform fault. Triaxial compression tests were conducted on dry olivine powder (grain size ???60 ??m) at effective confining pressures between...
The relationship between tree growth patterns and likelihood of mortality: A study of two tree species in the Sierra Nevada
A.J. Das, J. J. Battles, N.L. Stephenson, P. J. van Mantgem
2007, Canadian Journal of Forest Research (37) 580-597
We examined mortality of Abies concolor (Gord. & Glend.) Lindl. (white fir) and Pinus lambertiana Dougl. (sugar pine) by developing logistic models using three growth indices obtained from tree rings: average growth, growth trend, and count of abrupt growth declines. For P. lambertiana, models with average growth, growth trend, and count...
Geology and complex collapse mechanisms of the 3.72 Ma Hannegan caldera, North Cascades, Washington, USA
David S. Tucker, Wes Hildreth, Tom Ullrich, Richard M. Friedman
2007, Geological Society of America Bulletin (119) 329-342
Contiguous ring faults of the 8 × 3.5 km Hannegan caldera enclose the Hannegan volcanics in the Cascade arc of northern Washington. The caldera collapsed in two phases, which each erupted rhyolitic ignimbrite (72.3%–75.2% SiO2). The first collapse phase, probably trap-door style, erupted...
Genetic investigation of natural hybridization between rainbow and coastal cutthroat trout in the copper River Delta, Alaska
I. Williams, G.H. Reeves, S.L. Graziano, J.L. Nielsen
2007, Transactions of the American Fisheries Society (136) 926-942
Molecular genetic methods were used to quantify natural hybridization between rainbow trout Oncorhynchus mykiss or steelhead (anadromous rainbow trout) and coastal cutthroat trout O. clarkii clarkii collected in the Copper River delta, Southeast Alaska. Eleven locations were sampled to determine the extent of hybridization and the distribution of hybrids. Four diagnostic nuclear microsatellite loci...
Migration behavior of radio-tagged adult coho salmon and steelhead in the upper North Fork Toutle River, Washington: Final report of research 2005-2006
T.J. Kock, T.L. Liedtke, M.A Kritter, R.W. Perry, D.W. Rondorf, D.R. Hinson, C.R. Steward III, S. Wills
2007, Report
n/a ...
Physiological development of reintroduced Chinook salmon in the Upper Klamath Basin. 2006 final report
A.G. Maule, S. P. VanderKooi, J. Hamilton, R. Stocking, J. Bartholomew
2007, Report
n/a...
Birds of the Rio Grande and other riparian habitats of Western Webb County, Texas
Marc C. Woodin, Mary Kay Skoruppa, Gene W. Blacklock, Graham C. Hickman
2007, Bulletin of the Texas Ornithological Society (40) 67-80
We conducted 164 diurnal morning point counts in 1997 and 89 nocturnal point counts in 1998 along the Rio Grande and at other riparian habitats on remote ranchland in northwestern Webb County. We subsequently conducted 94 diurnal morning and 37 nocturnal point counts in 1999 on public lands along the...
Ecological interactions between hatchery spring Chinook salmon and wild steelhead in the Wind River, Washington, Report for activities in 2004 - 2006
I.G. Jezorek, P.J. Connolly, C.S. Munz, J. Charrier
2007, Report
n/a...
Behavior and passage of juvenile salmonids during evaluation of a fish screen at Cowlitz Falls, Dam, 2007: Final Report of Research
T.L. Liedtke, T.J. Kock, M.A Kritter, B.K. Ekstrom, D.W. Rondorf
2007, Report
n/a...
Brown-headed cowbird, Molothrus ater, parasitism and abundance in the northern Great Plains
L.D. Igl, Douglas H. Johnson
2007, Canadian Field-Naturalist (121) 239-255
The Brown-headed Cowbird (Molothrus ater) reaches its highest abundance in the northern Great Plains, but much of our understanding of cowbird ecology and host-parasite interactions comes from areas outside of this region. We examine cowbird brood parasitism and densities during two studies of breeding birds in the northern Great Plains...
Sandhill crane abundance and nesting ecology at Grays Lake, Idaho
J. E. Austin, A.R. Henry, I.J. Ball
2007, Journal of Wildlife Management (71) 1067-1079
We examined population size and factors influencing nest survival of greater sandhill cranes (Grus canadensis tabida) at Grays Lake National Wildlife Refuge, Idaho, USA, during 1997-2000. Average local population of cranes from late April to early May, 1998-2000, was 735 cranes, 34% higher than that reported for May 1970-1971. We...
Twenty-four years of Great Lakes lichen studies provide park biomonitoring baselines
J. P. Bennett
2007, Report D-1859
USGS National Wildlife Health Center's Quarterly Mortality Report
K. A. Converse, G. McLaughlin
2007, Supplement to the Journal of Wildlife Diseases (43)
USGS National Wildlife Health Center's Quarterly Wildlife Mortality Report (North America)
M. Jankowski, K. Schuler, J. Bradsby
2007, Supplement to the Journal of Wildlife Diseases (43)
Major and Trace-Element Data from Stream-Sediment and Rock Samples Collected in the Taylor Mountains 1:250,000-Scale Quadrangle, Alaska
Elizabeth A. Bailey, Gregory K. Lee, Seth H. Mueller, Bronwen Wang, Zoe Ann Brown, Greg A. Beischer
2007, Open-File Report 2007-1196
In the summers of 2004, 2005, and 2006, the U.S. Geological Survey conducted a reconnaissance geochemical survey of the drainage basins throughout most of the Taylor Mountains 1:250,000-scale quadrangle, in southwestern Alaska. The purpose of the study was to locate areas of potential interest for ore minerals, provide data that...
