The effect of mining and related activities on the sediment trace element geochemistry of the Spokane River Basin, Washington, USA
C.A. Grosbois, A. J. Horowitz, J.J. Smith, K. A. Elrick
2002, Geochemistry: Exploration, Environment, Analysis (2) 131-142
Surface sediments in the Spokane River Basin are enriched in Pb, Zn, As, Cd, Sb, and Hg relative to local background levels. Maximum enrichment occurs in the Upper Spokane River in close proximity to Lake Coeur d'Alene. On average, enrichment decreases downstream. Subsurface sediments also are enriched in Pb, Zn,...
Leaf δ13C variability with elevation, slope aspect, and precipitation in the southwest United States
Peter K. Van De Water, Steven W. Leavitt, Julio L. Betancourt
2002, Oecologia (132) 332-343
Leaves from several desert and woodland species, including gymnosperms and angiosperms with both C3 and C4 physiology, were analyzed to detect trends in δ13Cleaf with elevation and slope aspect along two transects in southeastern Utah and south-central New Mexico, USA. The main difference between the two transects is the...
Thermotolerance generated by plant/fungal symbiosis
Regina S. Redman, Kathy B. Sheehan, Richard G. Stout, Russell J. Rodriguez, Joan M. Henson
2002, Science (298) 1581
No abstract available....
Evaluation of longitudinal dispersivity estimates from forced-gradient tracer tests in heterogeneous aquifers
C. R. Tiedeman, P. A. Hsieh
2002, Acta Universitatis Carolinae, Geologica (46) 131-134
Converging radial-flow and two-well tracer tests are simulated in two-dimensional aquifers to investigate the effects of heterogeneity and forced-gradient test configuration on longitudinal dispersivity (??L) estimates, and to compare ??L estimates from forced-gradient tests with ??L values that characterize solute spreading under natural-gradient flow. Results indicate that in mildly heterogeneous...
An application of queuing theory to waterfowl migration
Richard S. Sojda, John E. Cornely, Leigh H. Fredrickson
A.E. Rizzoli, A.J. Jakeman, editor(s)
2002, Book chapter, Integrated assessment and decision support: Proceedings of the first biennial meeting of the International Environmental Modelling and Software Society
There has always been great interest in the migration of waterfowl and other birds. We have applied queuing theory to modelling waterfowl migration, beginning with a prototype system for the Rocky Mountain Population of trumpeter swans (Cygnus buccinator) in Western North America. The queuing model can be classified as a...
Diversion of meltwater from Kautz Glacier initiates small debris flows near Van Trump Park, Mount Rainier, Washington
James W. Vallance, Carolyn L. Driedger, William E. Scott
2002, Washington Geology (30) 17-19
No abstract available....
Responses of Florida panthers to recreational deer and hog hunting
Michael W. Janis, Joseph D. Clark
2002, Journal of Wildlife Management (66) 839-848
Big Cypress National Preserve constitutes approximately one-third of the range of the endangered Florida panther (Puma concolor coryi). Because recreational hunting is allowed in Big Cypress National Preserve, we examined 8 response variables (activity rates, movement rates, predation success, home-range size, home-range shifts, proximity to off-road vehicle trails, use of...
Potential preservation of native American petroglyphs at Steamboat Butte, Montana, using ethyl silicate solution treatments
D.A. Grisafe
2002, Plains Anthropologist (47) 77-84
Samples of the Tongue River Sandstone, collected from the top of Steamboat Butte in central Montana, were treated with an ethyl silicate solution. The samples showed a large increase in compressive strength and freeze-thaw resistance, relative to untreated samples, and indicates the treatment(s) significantly consolidate(s) the stone, thus providing a...
Reproductive success of the interior least tern (Sterna antillarum) in relation to hydrology on the Lower Mississippi River
Katie M. Dugger, Mark R. Ryan, David L. Galat, Rochelle B. Renken, John W Smith
2002, River Research and Applications (18) 97-105
The annual hydrograph of large rivers, including flood pulses and low-flow periods, is believed to play a primary role in the productivity of biota associated with these ecosystems. We investigated the relationship between river hydrology and Interior least tern (Sterna antillarum) reproductive success on the Lower Mississippi River from April...
Assessment of metal loads in watersheds affected by acid mine drainage by using tracer injection and synoptic sampling: Cement Creek, Colorado, USA
B. A. Kimball, R.L. Runkel, K. Walton-Day, K.E. Bencala
2002, Applied Geochemistry (17) 1183-1207
Watersheds in mineralized zones may contain many mines, each of which can contribute to acidity and the metal load of a stream. In this study the authors delineate hydrogeologic characteristics determining the transport of metals from the watershed to the stream in the watershed...
The structure of Yb3+ aquo ion and chloro complexes in aqueous solutions at up to 500 °C and 270 MPa
Robert A. Mayanovic, Sumedha Jayanetti, Alan J. Anderson, William A. Bassett, I.-M. Chou
2002, Journal of Physical Chemistry A (106) 6591-6599
We report here on X-ray absorption fine structure (XAFS) measurements used to determine the structure of the Yb3+ ion in aqueous solutions over a range of temperatures from 25 to 500 °C and pressures up to 270 MPa. Fluorescence Yb L3-edge spectra were collected separately from nitrate (0.006m Yb/0.16m HNO3) and chloride (0.006 m YbCl3/0.017 m HCl) aqueous...
A test of "Annual resolution" in stalagmites using tree rings
J.L. Betancourt, H. D. Grissino-Mayer, M.W. Salzer, T.W. Swetnam
2002, Quaternary Research (58) 197-199
So-called annual banding has been identified in a number of speleothems in which the number of bands approximates the time interval between successive U-series dates. The apparent annual resolution of speleothem records, however, remains largely untested. Here we statistically compare variations in band thickness from a late Holocene stalagmite in...
Increased incidence of red imported fire ant (Hymenoptera: Formicidae) presence in loggerhead sea turtle (Testudines: Cheloniidae) nests and observations of hatchling mortality
L.B. Parris, M.M. Lamont, R.R. Carthy
2002, Florida Entomologist (85) 514-517
No abstract available....
Activity patterns and monitoring numbers of Horned Puffins and Parakeet Auklets
Scott A. Hatch
2002, Waterbirds (25) 348-357
Nearshore counts of birds on the water and time-lapse photography were used to monitor seasonal activity patterns and interannual variation in numbers of Horned Puffins (Fratercula corniculata) and Parakeet Auklets (Aethia psittacula) at the Semidi Islands, Alaska. The best period for over-water counts was mid egg-laying through hatching in auklets...
Predation by Oregon spotted frogs (Rana pretiosa) on Western toads (Bufo boreas) in Oregon, USA
Christopher A. Pearl, M.P. Hayes
2002, American Midland Naturalist (147) 145-152
Toads of the genus Bufo co-occur with true frogs (family Ranidae) throughout their North American ranges. Yet, Bufo are rarely reported as prey for ranid frogs, perhaps due to dermal toxins that afford them protection from some predators. We report field observations from four different localities demonstrating that Oregon spotted...
Seed chemistry of Sophora chrysophylla (mamane) in relation to diet of specialist avian seed predator Loxioides bailleui (palila) in Hawaii
P.C. Banko, M.L. Cipollini, G.W. Breton, E. Paulk, M. Wink, Ido Izhaki
2002, Journal of Chemical Ecology (28) 1393-1410
This study describes the chemical ecology of a tritrophic interaction among species endemic to the island of Hawaii, USA: a tree (Sophora chrysophylla: mamane), an endangered bird (Loxioides bailleui; palila), and moth larvae (Cydia spp.). Palila and Cydia both specialize on the seed embryos of mamane but avoid eating the...
The use of U.S. Geological Survey CD-ROM-based petroleum assessments in undergraduate geology laboratories
R. L. Eves, L. E. Davis, T. S. Dyman, K. I. Takahashi
2002, Journal of Geoscience Education (50) 312-321
Domestic oil production is declining and United States reliance on imported oil is increasing. America will be faced with difficult decisions that address the strategic, economic, and political consequences of its energy resources shortage. The geologically literate undergraduate student needs to be aware of current and future United States energy...
Geoindicators for river and river-valley monitoring in the humid tropics
W. R. Osterkamp
2002, Environmental Geology (42) 725-735
Geoindicators for rivers and river valleys in the humid tropics are suggested to indicate environmental change during periods of up to a century. Geoindicators suggested for upland areas of supply are rainfall-runoff relations, rates of soil movement and slope failure, and analyses of drainage density. Data applicable to sediment storage...
The influence of microclimates and fog on stable isotope signatures used in interpretation of regional hydrology: East Maui, Hawaii
M. A. Scholl, S. B. Gingerich, G.W. Tribble
2002, Journal of Hydrology (264) 170-184
Stable isotopes of precipitation, ground water and surface water measured on the windward side of East Maui from 0 to 3055 m altitude were used to determine recharge sources for stream flow and ground water. Correct interpretation of the hydrology using rainfall ??18O gradients with altitude required consideration of the...
Inter-annual, seasonal and spatial variability in nutrient limitation of phytoplankton production in a river impoundment
P.A. Bukaveckas, A.S. Crain
2002, Hydrobiologia (481) 19-31
We characterize seasonal and spatial patterns in phytoplankton abundance, production and nutrient limitation in a mesotrophic river impoundment located in the southeastern United States to assess variation arising from inter-annual differences in watershed inputs. Short-term (48 h) in situ nutrient addition experiments were conducted between May and October at three...
A new population of Aleutian shield fern (Polystichum aleuticum C. Christens.) on Adak Island, Alaska
Sandra L. Talbot, Stephen S. Talbot
2002, American Fern Journal (92) 288-293
We report and describe a new population of the endangered Aleutian shield fern (Polystichum aleuticum C. Christens.) discovered on Mount Reed, Adak Island, Alaska. The new population is located at a lower elevation than the other known populations, placing the species' known elevational range between 338 m and 525 m....
The impact of climatic and seismic events on the short-term evolution of seacliffs based on 3-D mapping: Northern Monterey Bay, California
C. Hapke, B. Richmond
2002, Marine Geology (187) 259-278
Coastal cliff retreat along the central California coast is episodic, occurring in response to single large storms or seismic events. Traditional approaches to the study of long-term seacliff retreat utilize historical aerial photography and maps to delineate the landward migration of the top edge of the cliff over periods of...
Using chemical, hydrologic, and age dating analysis to delineate redox processes and flow paths in the riparian zone of a glacial outwash aquifer‐stream system
Larry J. Puckett, Timothy K. Cowdery, Peter B. McMahon, Lan H. Tornes, Jeffrey D. Stoner
2002, Water Resources Research (38) 9-1-9-20
A combination of chemical and dissolved gas analyses, chlorofluorocarbon age dating, and hydrologic measurements were used to determine the degree to which biogeochemical processes in a riparian wetland were responsible for removing NO3−from groundwaters discharging to the Otter Tail River in west central Minnesota. An analysis of river chemistry and...
Sea-cliff erosion as a function of beach changes and extreme wave runup during the 1997-1998 El Nino
A. H. Sallenger Jr., W. Krabill, J. Brock, R. Swift, S. Manizade, H. Stockdon
2002, Marine Geology (187) 279-297
Over time scales of hundreds to thousands of years, the net longshore sand transport direction along the central California coast has been driven to the south by North Pacific winter swell. In contrast, during the El Nin??o winter of 1997-1998, comparisons of before and after airborne lidar surveys showed sand...
Effects of nutrient enrichment on channel catfish growth and consumption in Mount Storm Lake, West Virginia
T.J. Blanc, F.J. Margraf
2002, Lakes and Reservoirs: Research and Management (7) 109-123
With the objective of augmenting fish production in Mount Storm Lake, Virginia Electric and Power Company initiated a programme of phosphorus addition to increase primary production, and ultimately, channel catfish (Ictaturus punctatus) growth in the 486 ha cooling reservoir. We simulated channel catfish growth dynamics using two bioenergetics modelling scenarios:...
