Slip-rate increase at Parkfield in 1993 detected by high-precision EDM and borehole tensor strainmeters
J. Langbein, R. L. Gwyther, R.H.G. Hart, M. T. Gladwin
1999, Geophysical Research Letters (26) 2529-2532
On two of the instrument networks at Parkfield, California, the two-color Electronic Distance Meter (EDM) network and Borehole Tensor Strainmeter (BTSM) network, we have detected a rate change starting in 1993 that has persisted at least 5 years. These and other instruments capable of measuring crustal deformation were installed at...
Climate and lake-level history of the northern altiplano, Bolivia, as recorded in holocene sediments of the Rio Desaguadero
P.C. Baucom, C.A. Rigsby
1999, Journal of Sedimentary Research (69) 597-611
Strata exposed in terraces and modern cutbanks along the Rio Desaguadero contain a variety of lithofacies that were deposited in four distinct facies associations. These facies associations document a history of aggradation and downcutting that is linked to Holocene climate change on the...
Techniques for restoration of disturbed coastal wetlands of the Great Lakes
Douglas A. Wilcox, Thomas H. Whillans
1999, Wetlands (19) 835-857
A long history of human-induced degradation of Great Lakes wetlands has made restoration a necessity, but the practice of wetland restoration is relatively new, especially in large lake systems. Therefore, we compiled tested methods and developed additional potential methods based on scientific understanding of Great Lakes wetland ecosytems to providc...
Dry Valley streams in Antarctica: Ecosystems waiting for water
Diane M. McKnight, D.K. Niyogi, A.S. Alger, A. Bomblies, P.A. Conovitz, C. M. Tate
1999, BioScience (49) 985-995
An axiom of ecology is: 'Where there is water, there is life.' In dry valley ecosystems of Antarctica, this axiom can be extended to: 'Where there has been and will be water, there is life.' Stream communities in the dry valleys can withstand desiccation on an annual basis and also...
Physical characteristics of summer sea ice across the Arctic Ocean
W. B. Tucker III, A. J. Gow, D.A. Meese, H.W. Bosworth, E. Reimnitz
1999, Journal of Geophysical Research C: Oceans (104) 1489-1504
Sea ice characteristics were investigated during July and August on the 1994 transect across the Arctic Ocean. Properties examined from ice cores included salinity, temperature, and ice structure. Salinities measured near zero at the surface, increasing to 3–4‰ at the ice-water interface. Ice crystal texture was dominated by columnar ice,...
Use of historical and geospatial data to guide the restoration of a Lake Erie coastal marsh
Kurt P. Kowalski, Douglas A. Wilcox
1999, Wetlands (19) 858-868
Historical and geospatial data were used to identify the relationships between water levels, wetland vegetation, littoral drift of sediments, and the condition of a protective barrier beach at Metzger Marsh, a coastal wetland in western Lake Erie, to enhance and guide a joint federal and state wetland restoration project. Eleven...
Detailed evaluation of gas hydrate reservoir properties using JAPEX/JNOC/GSC Mallik 2L-38 gas hydrate research well downhole well-log displays
T. S. Collett
1999, Bulletin of the Geological Survey of Canada 295-311
The JAPEX/JNOC/GSC Mallik 2L-38 gas hydrate research well project was designed to investigate the occurrence of in situ natural gas hydrate in the Mallik area of the Mackenzie Delta of Canada. Because gas hydrate is unstable at surface pressure and temperature conditions, a major emphasis was placed on the downhole...
Use of generalized linear models and digital data in a forest inventory of northern Utah
Gretchen G. Moisen, Thomas C. Edwards Jr.
1999, Journal of Agricultural, Biological, and Environmental Statistics (4) 372-390
Forest inventories, like those conducted by the Forest Service's Forest Inventory and Analysis Program (FIA) in the Rocky Mountain Region, are under increased pressure to produce better information at reduced costs. Here we describe our efforts in Utah to merge satellite-based information with forest inventory data for the purposes of...
Nearshore versus offshore copper loading in Lake Superior sediments: Implications for transport and cycling
J.J. Kolak, D.T. Long, W.C. Kerfoot, T.M. Beals, Steven J. Eisenreich
1999, Journal of Great Lakes Research (25) 611-624
A thorough understanding of the fate and transport of metals in Lake Superior is necessary in order to predict the ability of Lake Superior to recover from anthropogenic perturbations (copper mining). Sediment cores were collected from nearshore and offshore sites in...
Birds associated with black-tailed prairie dog colonies in southern shortgrass prairie
V.A. Barko, J.H. Shaw, David M. Leslie Jr.
1999, Southwestern Naturalist (44) 484-489
We conducted a census of avifaunal richness and abundance on black-tailed prairie dog (Cynomys ludovicianus) colonies and uncolonized shortgrass prairie in the Oklahoma panhandle in July 1995 and April-June 1996. Five black-tailed prairie dog colonies were paired with five uncolonized prairie sites having similar topography and soil structure. Data were...
Ventifacts at the Pathfinder landing site
N.T. Bridges, R. Greeley, A. F. C. Haldemann, Kenneth E. Herkenhoff, M. Kraft, T. J. Parker, A. W. Ward
1999, Journal of Geophysical Research E: Planets (104) 8595-8615
About half of the rocks at the Mars Pathfinder Ares Vallis landing site appear to be ventifacts, rocks abraded by windborne particles. Comparable resolution images taken by the Imager for Mars Pathfinder (IMP) camera and the Viking landers show that ventifacts are more abundant at the Pathfinder site. The ventifacts...
A source of unlimited energy?
T. S. Collett
1999, Energy (Norwalk, Connecticut) (24) 24
Gas hydrates will follow a predictable path to commercialization....
Nitrogen mineralization in a mature boreal forest, Isle Royale, Michigan
R. Stottlemyer, D. Toczydlowski
1999, Conference Paper, Journal of Environmental Quality
The 115-ha boreal Wallace Lake watershed, located on Isle Royale in the Lake Superior Basin, receives moderate anthropogenic atmospheric N inputs (3 kg ha-1 yr-1). Ecosystem response to atmospheric N inputs is, in part, determined by internal production and consumption of this limiting nutrient. The objectives of this 2-yr study...
International trends in university education for wildlife conservation and management
W.B. Kessler, S. Csanyi, R. Field
1999, Wildlife Society Bulletin (26) 927-936
[No abstract available]...
From in situ coal to the final coal product: A case study of the Danville Coal Member (Indiana)
Maria Mastalerz, P.L. Padgett
1999, International Journal of Coal Geology (41) 107-123
A surface coal mine operation and preparation plant in southwestern Indiana was sampled to examine variations in coal quality and coal petrography parameters for the Danville Coal Member of the Dugger Formation (Pennsylvanian-Desmoinesian, Westphalian D). Representative samples from in situ coal, preparation plant feeds, and a final coal product were...
Famous North American wolves and the credibility of early wildlife literature
P. S. Gipson, W.B. Ballard, R. M. Nowak
1999, Wildlife Society Bulletin (26) 808-816
We evaluated the credibility of early literature about famous North American wolves (Canis lupus). Many famous wolves were reported to be older than they actually were, and we estimated they did not live long enough to have caused purported damage to livestock and game animals. Wolf kill rates on free-ranging...
Transect across the West Antarctic rift system in the Ross Sea, Antarctica
H. Trey, A. K. Cooper, G. Pellis, Vedova B. Della, G. Cochrane, Giuliano Brancolini, J. Makris
1999, Tectonophysics (301) 61-74
In 1994, the ACRUP (Antarctic Crustal Profile) project recorded a 670-km-long geophysical transect across the southern Ross Sea to study the velocity and density structure of the crust and uppermost mantle of the West Antarctic rift system. Ray-trace modeling of P- and S-waves recorded on 47 ocean bottom seismograph (OBS)...
NEOCHIM: An electrochemical method for environmental application
R. W. Leinz, D.B. Hoover, A. L. Meier
1999, Journal of Geochemical Exploration (64) 421-434
Ion migration and electroosmosis are the principal processes underlying electrokinetic remediation of hazardous wastes from soils. These processes are a response of charged species to an applied electrical current and they are accompanied by electrolysis of water at the electrodes through which the current is applied. Electrolysis results in the...
Assessment of offshore New Jersey sources of Beach replenishment sand by diversified application of geologic and geophysical methods
J.S. Waldner, D. W. Hall, J. Uptegrove, R. E. Sheridan, G.M. Ashley, D. Esker
1999, Marine Georesources and Geotechnology (17) 139-140
Beach replenishment serves the dual purpose of maintaining a source of tourism and recreation while protecting life and property. For New Jersey, sources for beach sand supply are increasingly found offshore. To meet present and future needs, geologic and geophysical techniques can be used to improve the identification, volume estimation,...
Biochemical and molecular typing of Streptococcus iniae isolated from fish and human cases
S.V. Dodson, J.J. Maurer, E.B. Shotts
1999, Journal of Fish Diseases (22) 331-336
Streptococcus iniae is an important bacterial pathogen of fish, causing up to 50% mortality in stocks, which has recently been associated with human infections. To determine whether S. iniae isolates from humans and fish are similar, the present authors examined the biochemical profiles and genetic relatedness of these...
Induction of triploidy and tetraploidy in Nile tilapia, Oreochromis niloticus (L.)
A.-R.A. El Gamal, K. B. Davis, J.A. Jenkins, Torrans E. Les
1999, Journal of the World Aquaculture Society (30) 269-275
Induction of triploidy and tetraploidy in Nile tilapia, Oreochromis niloticus, was investigated by heat shock, cold shock, hydrostatic pressure, and/or chemicals (cytochalasin A, B, and D). Additionally, efficacy of combined protocols was determined. Heat shock 10 min after fertilization induced triploidy when incubation temperature was 24 C but not when incubation...
Attenuation and source properties at the Coso Geothermal area, California
S. E. Hough, J.M. Lees, F. Monastero
1999, Bulletin of the Seismological Society of America (89) 1606-1619
We use a multiple-empirical Green's function method to determine source properties of small (M −0.4 to 1.3) earthquakes and P- and S-wave attenuation at the Coso Geothermal Field, California. Source properties of a previously identified set of clustered events from the Coso geothermal region are first...
Alaska resource data file: Big Delta quadrangle
Cameron Rombach
1999, Open-File Report 99-354
No abstract available....
At-sea distribution of Spectacled Eiders: A 120-year-old mystery resolved
Margaret R. Petersen, William W. Larned, David C. Douglas
1999, The Auk (116) 1009-1020
The at-sea distribution of the threatened Spectacled Eider (Somateria fischeri) has remained largely undocumented. We identified migration corridors, staging and molting areas, and wintering areas of adult Spectacled Eiders using implanted satellite-transmitters in birds from each of the three extant breeding grounds (North Slope and Yukon-Kuskokwim Delta in Alaska and...
Cutaneous mastocytomas in the neotenic caudate amphibians Ambystoma mexicanum (axolotl) and Ambystoma tigrinum (tiger salamander)
J.C. Harshbarger, S.C. Chang, L.E. DeLanney, F.L. Rose, D. E. Green
1999, Journal of Cancer Research and Clinical Oncology (125) 187-192
Spontaneous mastocytomas studied in 18 axolotls (Ambystoma mexicanum) and six tiger salamanders (Ambystoma tigrinum) were gray-white, uni- to multilobular cutaneous protrusions from 2 mm to 2 cm in diameter. Tumors were moderately cellular unencapsulated masses that usually infiltrated the dermis and hypodermis with the destruction of intervening tissues. Some tumors were invading...
