Storm-driven sediment transport in Massachusetts Bay
J.C. Warner, B. Butman, P.S. Dalyander
2008, Continental Shelf Research (28) 257-282
Massachusetts Bay is a semi-enclosed embayment in the western Gulf of Maine about 50 km wide and 100 km long. Bottom sediment resuspension is controlled predominately by storm-induced surface waves and transport by the tidal- and wind-driven circulation. Because the Bay is open to the northeast, winds from the northeast...
Dislocation models of interseismic deformation in the western United States
F. F. Pollitz, P. McCrory, J. Svarc, J. Murray
2008, Journal of Geophysical Research B: Solid Earth (113)
The GPS-derived crustal velocity field of the western United States is used to construct dislocation models in a viscoelastic medium of interseismic crustal deformation. The interseismic velocity field is constrained by 1052 GPS velocity vectors spanning the ???2500-km-long plate boundary zone adjacent to the San Andreas fault and Cascadia subduction...
Detection rates of the MODIS active fire product in the United States
T. J. Hawbaker, V. C. Radeloff, A.D. Syphard, Z. Zhu, S. I. Stewart
2008, Remote Sensing of Environment (112) 2656-2664
MODIS active fire data offer new information about global fire patterns. However, uncertainties in detection rates can render satellite-derived fire statistics difficult to interpret. We evaluated the MODIS 1??km daily active fire product to quantify detection rates for both Terra and Aqua MODIS sensors, examined how cloud cover and fire...
Reconstructed historical land cover and biophysical parameters for studies of land-atmosphere interactions within the eastern United States
Louis T. Steyaert, R.G. Knox
2008, Journal of Geophysical Research D: Atmospheres (113) 1-27
Over the past 350 years, the eastern half of the United States experienced extensive land cover changes. These began with land clearing in the 1600s, continued with widespread deforestation, wetland drainage, and intensive land use by 1920, and then evolved to the present-day landscape of forest regrowth, intensive agriculture, urban...
Anthropogenic and natural lead isotopes in Fe-hydroxides and Fe-sulphates in a watershed associated with arsenic-enriched groundwater, Maine, USA
Robert A. Ayuso, Nora K. Foley
2008, Geochemistry: Exploration, Environment, Analysis (8) 77-89
A survey of the natural and anthropogenic sources of lead contributing to secondary minerals in sulphidic schists associated with arsenic-enriched groundwater in Coastal Maine shows that the most likely source is natural Pb, particularly from coexisting sulphide minerals. The secondary minerals also reflect notable contributions from anthropogenic Pb. The Pb...
Impacts of post-glacial lake drainage events and revised chronology of the Champlain Sea episode 13-9 ka
T. M. Cronin, P.L. Manley, S. Brachfeld, T.O. Manley, Debra A. Willard, J.-P. Guilbault, J.A. Rayburn, R. Thunell, M. Berke
2008, Palaeogeography, Palaeoclimatology, Palaeoecology (262) 46-60
Lithologic, CHIRP (Compressed High Intensity Radar Pulse) sonar, paleomagnetic, stable isotopic and micropaleontological analyses of sediment cores from Lake Champlain (New York, Vermont) were used to determine the age of the post-glacial Champlain Sea marine episode, the timing of salinity changes and their relationship to freshwater discharge from mid-continent glacial...
Physicochemical properties and chemical characteristics of water, bed sediment, and mussel tissue from selected streams near the Redleg and Peason Ridge impact areas, Fort Polk Military Reservation, Louisiana, June 2001 - November 2003
Roland W. Tollett, Robert B. Fendick Jr.
2008, Scientific Investigations Report 2007-5151
At the request of the U.S. Army Joint Readiness Training Center and Fort Polk, the U.S. Geological Survey collected and analyzed water, bed-sediment, and mussel-tissue samples from selected streams near the Redleg impact area (RIA) and Peason Ridge impact areas (PRIA) at the Fort Polk Military Reservation (Reservation), Louisiana. from...
Seagrass status and trends in the northern Gulf of Mexico: 1940-2002
D. Altsman, R. DeMay
L. Handley, editor(s)
2007, Scientific Investigations Report 2006-5287
Over the past century, seagrass habitats from the bays of Texas to the gulf shores of Florida have decreased. Seagrass beds, which are highly dependent on water quality and clarity for survival, are home to a multitude of aquatic plants and animals and a source of economic activity through commercial...
A Quantitative Threats Analysis for the Florida Manatee (Trichechus manatus latirostris)
Michael C. Runge, Carol A. Sanders-Reed, Catherine A. Langtimm, Christopher J. Fonnesbeck
2007, Open-File Report 2007-1086
The Florida manatee (Trichechus manatus latirostris) is an endangered marine mammal endemic to the southeastern United States. The primary threats to manatee populations are collisions with watercraft and the potential loss of warm-water refuges. For the purposes of listing, recovery, and regulation under the Endangered Species Act (ESA), an understanding...
A core stochastic population projection model for Florida manatees (Trichechus manatus latirostris)
Michael C. Runge, Carol A. Sanders-Reed, Christopher J. Fonnesbeck
2007, Open-File Report 2007-1082
A stochastic, stage-based population model was developed to describe the life history and forecast the population dynamics of the Florida manatee (Trichechus manatus latirostris) in four separate regions of Florida. This population model includes annual variability in survival and reproductive rates, demographic stochasticity, effects of changes in warm-water capacity, and...
The question of recharge to the deep thermal reservoir underlying the geysers and hot springs of Yellowstone National Park: Chapter H in Integrated geoscience studies in Integrated geoscience studies in the Greater Yellowstone Area—Volcanic, tectonic, and hydrothermal processes in the Yellowstone geoecosystem
Robert O. Rye, Alfred Hemingway Truesdell
Lisa A. Morgan, editor(s)
2007, Professional Paper 1717-H
The extraordinary number, size, and unspoiled beauty of the geysers and hot springs of Yellowstone National Park (the Park) make them a national treasure. The hydrology of these special features and their relation to cold waters of the Yellowstone area are poorly known. In the absence of deep drill holes,...
Modeling the dynamic response of a crater glacier to lava-dome emplacement: Mount St Helens, Washington, USA
Stephen F. Price, Joseph S. Walder
2007, Annals of Glaciology (45) 21-28
The debris-rich glacier that grew in the crater of Mount St Helens after the volcano's cataclysmic 1980 eruption was split in two by a new lava dome in 2004. For nearly six months, the eastern part of the glacier was squeezed against the crater wall as the lava...
Crustal deformation of the Yellowstone-Snake River Plain volcano-tectonic system-Campaign and continuous GPS observations, 1987-2004
C.M. Puskas, R. B. Smith, Charles M. Meertens, W. L. Chang
2007, Journal of Geophysical Research (112)
The Yellowstone-Snake River Plain tectonomagmatic province resulted from Late Tertiary volcanism in western North America, producing three large, caldera-forming eruptions at the Yellowstone Plateau in the last 2 Myr. To understand the kinematics and geodynamics of this volcanic system, the University of...
Explosive eruptive record in the Katmai region, Alaska Peninsula: An overview
Judy Fierstein
2007, Bulletin of Volcanology (69) 469-509
At least 15 explosive eruptions from the Katmai cluster of volcanoes and another nine from other volcanoes on the Alaska Peninsula are preserved as tephra layers in syn- and post-glacial (Last Glacial Maximum) loess and soil sections in Katmai National Park, AK. About 400 tephra samples...
Ground-coupled acoustic airwaves from Mount St. Helens provide constraints on the May 18, 1980 eruption
J.B. Johnson, S. D. Malone
2007, Earth and Planetary Science Letters (258) 16-31
The May 18, 1980 Mount St. Helens eruption perturbed the atmosphere and generated atmosphere-to-ground coupled airwaves, which were recorded on at least 35 seismometers operated by the Pacific Northwest Seismograph Network (PNSN). From 102 distinct travel time picks we identify coherent airwaves crossing Washington State primarily to the north and...
Incremental assembly and prolonged consolidation of Cordilleran magma chambers--Evidence from the Southern Rocky Mountain volcanic field
Peter W. Lipman
2007, Geosphere (3) 42-70
Recent inference that Mesozoic Cordilleran plutons grew incrementally during >106 yr intervals, without the presence of voluminous eruptible magma at any stage, minimizes close associations with large ignimbrite calderas. Alternatively, Tertiary ignimbrites in the Rocky Mountains and elsewhere, with volumes of 1–5 × 103 km3, record multistage histories...
Where the buffalo roam: The role of history and genetics in the conservation of bison on U.S. federal lands
Natalie D. Halbert, Peter J. Gogan, Ron Hiebert, James N. Derr
2007, Park Science (24) 22-29
As an emblem of the Great Plains, American Indians, and wildlife conservation, the American bison (Bison bison) is one of the most visible and well-known of wildlife species in North America (fig. 1, above). Species of the genus Bison originally entered the continent via the Bering land bridge from...
Volcanic fire and glacial ice: Mount Rogers National Recreation Area
Water Resources Division, U.S. Geological Survey, U.S. Forest Service
2007, Report
In addition to containing the highest point in Virginia (Mount Rogers, elevation 5,729 feet), the Mount Rogers National Recreation Area (NRA) of the Jefferson National Forest is a window on the history of ancient volcanic eruptions and glacial movement....
Petroleum systems of the San Joaquin Basin Province, California -- geochemical characteristics of oil types: Chapter 9 in Petroleum systems and geologic assessment of oil and gas in the San Joaquin Basin Province, California
Paul G. Lillis, Leslie B. Magoon
2007, Professional Paper 1713-9
New analyses of 120 oil samples combined with 139 previously published oil analyses were used to characterize and map the distribution of oil types in the San Joaquin Basin, California. The results show that there are at least four oil types designated MM, ET, EK, and CM. Most of the...
Climatic variation and the distribution of an amphibian polyploid complex
C.R.V. Otto, J.W. Snodgrass, D.C. Forester, J.C. Mitchell, R.W. Miller
2007, Journal of Animal Ecology (76) 1053-1061
1. The establishment of polyploid populations involves the persistence and growth of the polyploid in the presence of the progenitor species. Although there have been a number of animal polyploid species documented, relatively few inquiries have been made into the large-scale mechanisms of polyploid establishment in animal groups. Herein we...
Iteroparity in the variable environment of the salamander Ambystoma tigrinum
D.R. Church, L.L. Bailey, H.M. Wilbur, W. L. Kendall, J.E. Hines
2007, Ecology (88) 891-903
Simultaneous estimation of survival, reproduction, and movement is essential to understanding how species maximize lifetime reproduction in environments that vary across space and time. We conducted a four-year, capture–recapture study of three populations of eastern tiger salamanders (Ambystoma tigrinum tigrinum) and used multistate mark–recapture statistical methods to estimate the manner...
Modeling and mapping abundance of American Woodcock across the Midwestern and Northeastern United States
W.E. Thogmartin, J.R. Sauer, M. G. Knutson
2007, Journal of Wildlife Management (71) 376-382
We used an over-dispersed Poisson regression with fixed and random effects, fitted by Markov chain Monte Carlo methods, to model population spatial patterns of relative abundance of American woodcock (Scolopax minor) across its breeding range in the United States. We predicted North American woodcock Singing Ground Survey counts with a...
Chytridiomycosis widespread in Anurans of Northeastern United States
J. R. Longcore, J.E. Longcore, Allan P. Pessier, W.A. Halteman
2007, Journal of Wildlife Management (71) 435-444
An emerging disease of amphibians caused by the chytrid fungus Batrachochytrium dendrobatidis has been associated with morbidity, mortality, and extinction of species. Typically, researchers have detected B. dendrobatidis only when examining amphibians for causes of mortalities; few data exist on infection rates where mortalities are lacking. During May-September 2000-2002 we...
Effects of habitat change along Breeding Bird Survey routes in the central Appalachians on Cerulean Warbler population
P. McElhone, P.W. Wood, D. Dawson
2007, Proceedings of the Annual Conference of the Southeastern Association of Fish and Wildlife Agencies (61) 131 (abs)
The cerulean warbler (Dendroica cerulea) is one of the highest priority bird species in the eastern United States because populations have declined 4.3% annually during 1966?2005 based on Breeding Bird Survey (BBS) data. Habitat loss and fragmentation due to land use changes is thought to be one of the...
South San Francisco Bay, California
Peter Dartnell, Helen Gibbons
2007, General Information Product 57
The U.S. Geological Survey, in cooperation with the California Coastal Conservancy and the National Oceanic and Atmospheric Administration, mapped the floor of south San Francisco Bay and adjoining land using single-beam sonar and airborne lidar (light detection and ranging). To learn more, visit http://pubs.usgs.gov/sim/2007/2987/. View eastward. Elevations in mapped area color...
