Sediment yield following severe volcanic disturbance - A two-decade perspective from Mount St. Helens
J. J. Major, T.C. Pierson, R.L. Dinehart, J. E. Costa
2000, Geology (28) 819-822
Explosive volcanic eruptions perturb water and sediment fluxes in watersheds; consequently, posteruption sediment yields can exceed pre-eruption yields by several orders of magnitude. Annual suspended-sediment yields following the catastrophic 1980 Mount St. Helens eruption were as much as 500 times greater than typical background level, and they generally declined nonlinearly...
Florida manatee now resident in the Bahamas
James P. Reid
2000, Sirenews (33) 7-8
In January 2000, both the Bahamas National Trust and the Save the Manatee Club received reports of a manatee at Bullocks Harbor, Great Harbour Cay, Bahamas. Under permit with the Bahamas’ Department of Fisheries, I visited Great Harbour Cay from 25 to 27 February 2000 to make a field assessment...
Diversity, distribution, and conservation status of the native freshwater fishes of the southern United States
Melvin L. Warren Jr., Brooks M. Burr, Stephen J. Walsh, Henry L. Bart Jr., Robert C. Cashner, David A. Etnier, Byron J. Freeman, Bernard R. Kuhajda, Richard L. Mayden, Henry W. Robison, Stephen T. Ross, Wayne C. Starnes
2000, Fisheries (25) 7-31
The Southeastern Fishes Council Technical Advisory Committee reviewed the diversity, distribution, and status of all native freshwater and diadromous fishes across 51 major drainage units of the southern United States. The southern United States supports more native fishes than any area of comparable size on the North American continent north...
Preface – Groundwater and microbial processes
Barbara Bekins
2000, Hydrogeology Journal (8) 2-3
No abstract available....
Digital geologic map of Arizona: A digital database derived from the 1983 printing of the Wilson, Moore, and Cooper 1:500,000-scale map
Douglas M. Hirschberg, G. Stephen Pitts
2000, Open-File Report 2000-409
This report describes a digital geologic GIS database in an Arc/Info format for the “Geologic Map of Arizona” by Wilson and others (1983 edition)....
Earthquake stress triggers, stress shadows, and seismic hazard
R.A. Harris
2000, Current Science (79) 1215-1225
Many aspects of earthquake mechanics remain an enigma at the beginning of the twenty-first century. One potential bright spot is the realization that simple calculations of stress changes may explain some earthquake interactions, just as previous and ongoing studies of stress changes have begun to explain human- induced seismicity. This...
Non-native grasses and fires create double jeopardy
T. Esque, C. Schwalbe
2000, People, Land, and Water 26
No abstract available at this time...
Effects of neck bands on survival of greater snow geese
S. Menu, J.B. Hestbeck, G. Gauthier, A. Reed
2000, Journal of Wildlife Management (64) 544-552
Neck bands are a widely used marker in goose research. However, few studies have investigated a possible negative effect of this marker on survival. We tested the effect of neck bands on the survival of adult female greater snow geese (Chen caerulescens atlantica) by marking birds with either a neck...
Effects of long-term changes in the benthic community on yellow perch in Saginaw Bay, Lake Huron
Jeffrey S. Schaeffer, James S. Diana, Robert C. Haas
2000, Journal of Great Lakes Research (26) 340-351
Abundance, mortality, age and growth, food habits, and energetics of a yellow perch Perca flavescens population were investigated in eutrophic Saginaw Bay, Lake Huron during May to October, 1986 to 1988, and compared population characteristics with historical data from times when eutrophic conditions were less severe. During 1986 to 1988,...
Genetic analysis of hatchery and wild fall-run Chinook salmon (Oncorhynchus tshawystcha) in the Central Valley, California
O.J. Avelino, L. Nielsen
2000, Technical Report FG8002-IF
Fracture process zone in granite
A. Zang, F.C. Wagner, S. Stanchits, C. Janssen, G. Dresen
2000, Journal of Geophysical Research B: Solid Earth (105) 23651-23661
In uniaxial compression tests performed on Aue granite cores (diameter 50 mm, length 100 mm), a steel loading plate was used to induce the formation of a discrete shear fracture. A zone of distributed microcracks surrounds the tip of the propagating fracture. This process zone is imaged by locating acoustic...
Mobilization of arsenite by dissimilatory reduction of adsorbed arsenate
J. Zobrist, P.R. Dowdle, J.A. Davis, Ronald S. Oremland
2000, Environmental Science & Technology (34) 4747-4753
Sulfurospirillum barnesii is capable of anaerobic growth using ferric iron or arsenate as electron acceptors. Cell suspensions of S. barnesii were able to reduce arsenate to arsenite when the former oxyanion was dissolved in solution, or when it was adsorbed onto the surface of ferrihydrite, a common soil mineral, by...
ARD remediation with limestone in a CO2 pressurized reactor
Philip L. Sibrell, Barnaby J. Watten, Andrew E. Friedrich, Brian J. Vinci
2000, Conference Paper, Proceedings from the Fifth International Conference on Acid Rock Drainage
We evaluated a new process for remediation of acid rock drainage (ARD). The process treats ARD with intermittently fluidized beds of granular limestone maintained within a continuous flow reactor pressurized with CO2. Tests were performed over a thirty day period at the Toby Creek mine drainage treatment plant, Elk County,...
Parent brine of the castile evaporites (Upper Permian), Texas and New Mexico
Douglas W. Kirkland, Rodger E. Denison, Walter E. Dean
2000, Journal of Sedimentary Research (70) 749-761
The Upper Permian (lower Ochoan) Castile Formation is a major evaporite sequence (∼10,000 km3) of calcite, anhydrite, and halite in west Texas and southeastern New Mexico. Traditionally the Castile brine has been considered to have been derived from seawater. This tradition has recently been challenged by two versions of the...
Shifts in depth distributions of alewives, rainbow smelt, and age-2 lake trout in southern Lake Ontario following establishment of Dreissenids
Robert O’Gorman, Joseph H. Elrod, Randall W. Owens, Clifford P. Schneider, Thomas H. Eckert, Brian F. Lantry
2000, Transactions of the American Fisheries Society (129) 1096-1106
In the mid-1990s, biologists conducting assessments of fish stocks in Lake Ontario reported finding alewives Alosa pseudoharengus, rainbow smelt Osmerus mordax, and juvenile lake trout Salvelinus namaycush at greater depths than in the mid-1980s. To determine if depth distributions shifted coincident with the early 1990s colonization of Lake Ontario by exotic Dreissena mussels, we calculated mean...
Comparisons of in situ and core gas measurements in ODP Leg 164 bore holes
C. K. Paull, T.D. Lorenson, G. Dickens, W.S. Borowski, W. Ussler III, K. Kvenvolden
2000, Conference Paper, Annals of the New York Academy of Sciences
During Ocean Drilling Program Leg 164, an unprecedented effort was made to determine the amounts of gas and gas hydrate in the sediments from Sites 994, 995, and 997. For the first time in the history of academic drilling, a pressure core sampler (PCS) worked well enough to generate an...
Diet of first-feeding larval and young-of-the-year white sturgeon in the lower Columbia River
W.D. Muir, G.T. McCabe Jr., M.J. Parsley, S.A. Hinton
2000, Northwest Science (74) 25-33
In some Snake and Columbia River reservoirs, adult white sturgeon (Acipenser transmontanus) are common but few juvenile fish are found, indicating a lack of spawning success or poor survival of larvae. In contrast, recruitment of young-of-the-year white sturgeon to juvenile and adult stages is successful in the unimpounded Columbia River...
Conditions for generation of fire-related debris flows, Capulin Canyon, New Mexico
S.H. Cannon, Steven L. Reneau
2000, Earth Surface Processes and Landforms (25) 1103-1121
Comparison of the responses of three drainage basins burned by the Dome fire of 1996 in New Mexico is used to identify the hillslope, channel and fire characteristics that indicate a susceptibility specifically to wildfire-related debris flow. Summer thunderstorms generated three distinct erosive responses from each of three basins. The...
Wolf restoration to the Adirondacks: the advantages and disadvantages of public participation in the decision
L. David Mech
V.A. Sharpe, B. Norton, S. Donnelley, editor(s)
2000, Book chapter, Wolves and human communities: Biology, politics, and ethics
The first time I ever saw a wolf in New York State's Adirondack Mountains was in 1956. It was a brush wolf, or coyote (Canis latrans), not a real wolf, but to an eager young wildlife student this distinction meant little. The presence of this large deer-killing canid let my...
Pesticides in the atmosphere of the Mississippi River Valley, part I: Rain
M.S. Majewski, W.T. Foreman, D. A. Goolsby
2000, Science of Total Environment (248) 201-212
Weekly composite rainfall samples were collected in three paired urban and agricultural regions of the Midwestern United States and along the Mississippi River during April–September 1995. The paired sampling sites were located in Mississippi, Iowa, and Minnesota. A background site, removed from dense urban and agriculture...
The severity of an earthquake
Water Resources Division, U.S. Geological Survey
2000, Report
Declines of greater and lesser scaup populations: issues, hypotheses, and research needs
J. E. Austin, A. D. Afton, M.G. Anderson, R. G. Clark, Christine M. Custer, J. Lawrence, J.B. Pollard, J.K. Ringelman
2000, Wildlife Society Bulletin (28) 254-263
The population estimate for greater (Aythya marila) and lesser (Aythya affinis) scaup (combined) has declined dramatically since the early 1980s to record lows in 1998. The 1998 estimate of 3.47 million scaup is far below the goal of 6.3 million set in the North American Waterfowl Management Plan (NAWMP), causing...
Sustainability of the Lake Superior fish community: Interactions in a food web context
James F. Kitchell, Sean P. Cox, Chris J. Harvey, Timothy B. Johnson, Doran M. Mason, Kurt K. Schoen, Kerim Aydin, Charles Bronte, Mark Ebener, Michael Hansen, Michael Hoff, Steve Schram, Don Schreiner, Carl J. Walters
2000, Ecosystems (3) 545-560
The restoration and rehabilitation of the native fish communities is a long-term goal for the Laurentian Great Lakes. In Lake Superior, the ongoing restoration of the native lake trout populations is now regarded as one of the major success stories in fisheries management. However, populations of the deepwater morphotype (siscowet...
Forest soil chemistry and terrain attributes in a Catskills watershed
C.E. Johnson, J. J. Ruiz-Mendez, G.B. Lawrence
2000, Soil Science Society of America Journal (64) 1804-1814
Knowledge of soil chemistry is useful in assessing the sensitivity of forested areas to natural and anthropogenic disturbances, but characterizing large areas is expensive because of the large sample numbers required and the cost of soil chemical analyses. We collected and chemically analyzed soil samples from 72 sites within a...
Atmospheric transport, deposition, and fate of triazine herbicides and their metabolites in pristine areas at Isle Royale National Park
E.M. Thurman, A.E. Cromwell
2000, Environmental Science & Technology (34) 3079-3085
Trace concentrations of triazine herbicides, used in the Midwestern United States, are being transported atmospherically hundreds of kilometers and deposited by precipitation onto pristine areas, such as Isle Royale National Park (Lake Superior). Atrazine, deethylatrazine, deisopropylatrazine, and cyanazine were detected in Isle Royale rainfall from mid-May to...
