Field Measurements of Reynolds Stress near a Riverbank
J. A. Moody, J.D. Smith
Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B.Wahl T.L.Pugh C.A.Oberg K.A.Vermeyen T.B., editor(s)
2002, Conference Paper, Hydraulic Measurements and Experimental Methods
The Reynolds stress field was measured near the bank of the Powder River in southeastern Montana. The measurements were made from the bank using an aluminum I-beam cantilevered over the water to support a carriage system for positioning an acoustic doppler velocimeter in a vertical plane perpendicular to 1) the...
System analysis to estimate subsurface flow: From global level to the State of Minnesota
B.A. Shmagin, R. Kanivetsky
2002, Environmental Geology (42) 259-269
Stream runoff data globally and in the state of Minnesota were used to estimate subsurface water flow. This system approach is based, in principal, on unity of groundwater and surface water systems, and it is in stark contrast to the traditional deterministic approach based on modeling. In coordination with methodology...
Effects of vegetation management in constructed wetland treatment cells on water quality and mosquito production
Joan S. Thullen, James J. Sartoris, W. E. Walton
2002, Ecological Engineering (18) 441-457
The impact of three vegetation management strategies on wetland treatment function and mosquito production was assessed in eight free water surface wetland test cells in southern California during 1998–1999. The effectiveness of the strategies to limit bulrush Schoenoplectus californicus culm density within the cells was also investigated. Removing...
The proximal part of the giant submarine Wailau landslide, Molokai, Hawaii
D.A. Clague, J.G. Moore
2002, Journal of Volcanology and Geothermal Research (113) 259-287
The main break-in-slope on the northern submarine flank of Molokai at -1500 to -1250 m is a shoreline feature that has been only modestly modified by the Wailau landslide. Submarine canyons above the break-in-slope, including one meandering stream, were subaerially carved. Where such canyons cross the break-in-slope, plunge pools may...
Planning for the conservation and development of infrastructure resources in urban areas-Colorado front range urban corridor: Things planners, decision-makers, and the public should know
Belinda F. Arbogast, L. Rick Arnold, Neil S. Fishman, William H. Langer, Carol S. Mladinich, James E. Roelle, David R. Wilburn
Daniel H. Knepper, editor(s)
2002, Circular 1219
This Circular provides a basic understanding of the characteristics, location, distribution, and quality of infrastructure resources (natural aggregate, energy, and water) in the Colorado Front Range urban corridor between Denver and Ft. Collins. With this understanding, the reader explores the many factors that affect the current and future availability of...
Tidal and meteorological influences on shallow marine groundwater flow in the upper Florida Keys
Christopher D. Reich, Eugene A. Shinn, Todd D. Hickey, Ann B. Tihansky
2002, Book chapter, The Everglades, Florida Bay, and coral reefs of the Florida Keys: an ecosystem sourcebook
No abstract available....
Description of nests, eggs, and nestlings of the endangered nightingale reed-warbler on Saipan, Micronesia
Stephen M. Mosher, Steven G. Fancy
2002, The Wilson Bulletin (114) 1-10
We describe the first verified nests, eggs, and nestlings of the Nightingale Reed-Warbler (Acrocephalus luscinia), an endangered species endemic to the Mariana Islands, Micronesia. Nest composition, nest dimensions, and eggs were studied on the island of Saipan. Nests were located within three habitat types: upland introduced tangantangan (Leucaena...
Pockmarks off Big Sur, California
C. Paull, W. Ussler III, N. Maher, H. Gary Greene, G. Rehder, T. Lorenson, H. Lee
2002, Marine Geology (181) 323-335
A pockmark field was discovered during EM-300 multi-beam bathymetric surveys on the lower continental slope off the Big Sur coast of California. The field contains ??? 1500 pockmarks which are between 130 and 260 m in diameter, and typically are 8-12 m deep located within a 560 km2 area. To...
Geologic and paleoseismic study of the Lavic Lake fault at Lavic Lake Playa, Mojave Desert, southern California
M. J. Rymer, G. G. Seitz, K. D. Weaver, A. Orgil, G. Faneros, J. C. Hamilton, C. Goetz
2002, Bulletin of the Seismological Society of America (92) 1577-1591
Paleoseismic investigations of the Lavic Lake fault at Lavic Lake playa place constraints on the timing of a possible earlier earthquake along the 1999 Hector Mine rupture trace and reveal evidence of the timing of the penultimate earthquake on a strand of the Lavic Lake fault that did not rupture...
Persistence of pikas in two low-elevation national monuments in the western United States
E.A. Beever
2002, Park Science (21) 23-29
[No abstract available]...
Persistent episodic acidification of streams linked to acid rain effects on soil
G.B. Lawrence
2002, Atmospheric Environment (36) 1589-1598
Episodic acidification of streams, identified in the late 1980s as one of the most significant environmental problems caused by acidic deposition, had not been evaluated since the early 1990s despite decreasing levels of acidic deposition over the past decade. This analysis indicates that episodic acidification of streams in upland regions...
A comparative assessment of genetic diversity among differently-aged populations of Spartina alterniflora on restored versus natural wetlands
S.E. Travis, C.E. Proffitt, R.C. Lowenfeld, T.W. Mitchell
2002, Restoration Ecology (10) 37-42
We collected naturally recolonizing Spartina alterniflora (smooth cord grass) from each of three restored sites and one undisturbed reference site in southwestern Louisiana to assess the impact of wetland restoration on genetic diversity. We used amplified fragment length polymorphisms (AFLPs) to produce 94 polymorphic genetic markers, which were used to...
Catastrophic erosion of Hellas basin rim on Mars induced by magmatic intrusion into volatile-rich rocks
K. L. Tanaka, J.S. Kargel, D. J. MacKinnon, T.M. Hare, N. Hoffman
2002, Geophysical Research Letters (29) 37-1-37-4
Malea and Hesperia Plana form large sectors of the rim of Hellas basin that display partly eroded volcanic shields and plains. These regions have topographic profiles that appear to be several hundred meters lower than those of adjacent rim sectors and lack prominent massifs of remnant basement that would be...
Understanding arid environments using fossil rodent middens
S. Pearson, J.L. Betancourt
2002, Journal of Arid Environments (50) 499-511
American rodent middens have made a more dramatic contribution to understanding past environments and the development of ecological theory than Australian rodent middens. This relates to differences in the natural environment, the landscape histories, the scale and scientific approaches of the researchers. The comparison demonstrates: the power of synoptic perspectives;...
The Salton Sea: Proceedings of the Salton Sea Symposium
D. A. Barnum, J. F. Elder, D. Stevens, M. Friend
2002, Book
No abstract available....
Life-history implications of large-scale spatial variation in adult survival of black brant (Branta bernicla nigricans)
James S. Sedinger, Nathan Chelgren, Mark S. Lindberg, Tim Obritchkewitch, Morgan T. Kirk, Philip D. Martin, Betty A. Anderson, David H. Ward
2002, The Auk (119) 510-515
We used capture-recapture methods to estimate adult survival rates for adult female Black Brant (Branta bernicla nigricans; hereafter “brant”) from three colonies in Alaska, two on the Yukon-Kuskokwim Delta, and one on Alaska's Arctic coast. Costs of migration and reproductive effort varied among those colonies, enabling us to examine variation...
The role of the egg jelly coat in protecting Hyla regilla and Bufo canorus embryos from Ultraviolet B radiation during development
L.J. Hansen, D. L. Fabacher, R. Calfee
2002, Environmental Science and Pollution Research (9) 412-416
Background. Previous studies have suggested that Ultraviolet B (UVB) radiation may play a role in amphibian population declines. Some of these studies also indicate that egg hatching success is unaltered in some species of anurans as a result of UVB exposure. It has been proposed that the egg mass jelly...
The endemic headwater stream amphibians of the American Northwest: Associations with environmental gradients in a large forested preserve
M. J. Adams, R. Bruce Bury
2002, Global Ecology and Biogeography (11) 169-178
We used a large forested preserve (Olympic National Park, USA) to examine the habitat associations of a unique and environmentally sensitive stream amphibian fauna: Ascaphus truei Stegneger, Rhyacotriton olympicus (Gaige) and Dicamptodon copei Nussbaum. We quantified the relative abundance of stream amphibians and compared them to physical, topographic, climatic and...
Chronic impacts of oil pollution in the sea: risks to vertebrate predators
C. H. Peterson
2002, Marine Ecology Progress Series (241) 235-236
No abstract available....
Scaup migration patterns in North Dakota relative to temperatures and water conditions
J. E. Austin, D. A. Granfors, M. A. Johnson, S. C. Kohn
2002, Journal of Wildlife Management (66) 874-882
Greater (Aythya marila) and lesser scaup (A. affinis) have protracted spring migrations. Migrants may still be present on southern breeding areas when the annual Waterfowl Breeding Population and Habitat Surveys (WBPHS) are being conducted. Understanding factors affecting the chronology and rate of spring migration is important for the interpretation of...
Environmental contaminants in prey and tissues of the peregrine falcon in the Big Bend Region, Texas, USA.
M. Mora, R. Skiles, B. McKinney, M. Paredes, D. Buckler, D. Papoulias, D. Klein
2002, Environmental Pollution (116) 169-176
Peregrine falcons (Falco peregrinus) have been recorded nesting in Big Bend National Park, Texas, USA and other areas of the Chihuahuan Desert since the early 1900s. From 1993 to 1996, peregrine falcon productivity rates were very low and coincided with periods of low rainfall. However, low productivity also was suspected...
High-resolution topography along surface rupture of the 16 October 1999 Hector Mine, California (Mw 7.1) from airborne laser swath mapping
K.W. Hudnutt, A. Borsa, C. Glennie, J.-B. Minster
2002, Bulletin of the Seismological Society of America (92) 1570-1576
In order to document surface rupture associated with the Hector Mine earthquake, in particular, the area of maximum slip and the deformed surface of Lavic Lake playa, we acquired high-resolution data using relatively new topographic-mapping methods. We performed a raster-laser scan of the main surface breaks along the entire rupture...
Project summary, discussion, and recommendations
C. J. Schmitt, D. E. Tillitt, V. S. Blazer, T. S. Gross, N. D. Denslow, T.M. Bartish, B.S. Arnold
2002, Information and Technology Report USGS/BRD/ITR-2002-0004
No abstract available at this time...
Americans' attitudes toward wolves and wolf reintroduction: An annotated bibliography
Christine Browne-Nunez, Jonathan G. Taylor
2002, Information and Technology Report 2002-0002
During the period 1974-2000, 50 reports were published in peer-reviewed journals and in theses and dissertations concerning public altitudes and preferences toward wolves and their reinstatement into previously occupied habitat in the continental U.S. This publication provides annotated synopses of these 50 reports, arranged chronologically, but also cross-referenced by authors...
Invasive plant species: Inventory, mapping, and monitoring - A national strategy
J. Larry Ludke, Frank D’Erchia, Jan Coffelt, Leanne Hanson
2002, Information and Technology Report 2002-0006
America is under siege by invasive species of plants and animals, and by diseases. The current environmental, economic, and health-related costs of invasive species could exceed $138 billion per year-more than all other natural disasters combined. Notorious examples include West Nile virus, Dutch elm disease, chestnut blight, and purple loose-...
