Soluble trace elements and total mercury in Arctic Alaskan snow
E. Snyder-Conn, John R. Garbarino, Gerald L. Hoffman, A. Oelkers
1997, Arctic (50) 201-215
Ultraclean field and laboratory procedures were used to examine trace element concentrations in northern Alaskan snow. Sixteen soluble trace elements and total mercury were determined in snow core samples representing the annual snowfall deposited during the 1993-94 season at two sites in the Prudhoe Bay oil field and nine sites...
Imperiled mammalian fauna of aquatic ecosystems in the Southeast: A management perspective
J. D. Clark, M. J. Harvey
G.W. Benz, D.E. Collins, editor(s)
1997, Book chapter, Aquatic fauna in peril: The southeastern perspective (Southeast Aquatic Research Institute special publication, 1)
Management of imperiled mammals associated with aquatic ecosystems in the southeastern United States ranges from almost no management for some species to intensive, high-profile programs for others. Aquatic mammals are notoriously difficult to census because they are often secretive, trap-wary, relatively rare, or have extensive movement patterns. As a result,...
Final report of the California spotted owl Federal Advisory Committee
W. Philpot C, N.L. Christensen, N.L. Colegrove, L.N. Decker, T.P. Duane, J.F. Franklin, R. Graham, R. J. Gutierrez, N.H. Pilsbury, A.R. Stage, J. W. van Wagtendonk
1997, Report
No abstract available at this time...
Macrophage aggregates: biomarker for immune function in fishes?
V. S. Blazer, J.W. Fournie, B. A. Weeks-Perkins
F.J. Dwyer, T.R. Doane, M.L. Hinman, editor(s)
1997, Book chapter, Environmental Toxicology and Risk Assessment: Modeling and Risk Assessment; Volume 6
No abstract available at this time...
Status of aquatic mollusks in the southeastern United States: a downward spiral of diversity
R. J. Neves, A.E. Bogan, J.D. Williams, S.A. Ahlstedt, P.D. Hartfield
G.W. Benz, D.E. Collins, editor(s)
1997, Book chapter, Aquatic Fauna in Peril: The Southeastern Perspective. Special Publication 1. Southeast Aquatic Research Institute.
Abstract not supplied at this time...
Disturbance of biological soil crusts: Impacts on potential wind erodibility of sandy desert soils in southeastern Utah
J. Belnap, Dale A. Gillette
1997, Land Degradation and Development (8) 355-362
Friction threshold velocities (FTVs) were determined for biological soil crusts in different stages of recovery. Particles on the surface of crusts that had been relatively undisturbed for at least 20 years were found to have significantly higher FTVs than those that had been disturbed 5, 10 or 1 years previously...
Long time-series of turbid coastal water using AVHRR: An example from Florida Bay, USA
R. P. Stumpf, M.L. Frayer
1997, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The AVHRR can provide information on the reflectance of turbid case II water, permitting examination of large estuaries and plumes from major rivers. The AVHRR has been onboard several NOAA satellites, with afternoon overpasses since 1981, offering a long time-series to examine changes in coastal water. We are using AVHRR...
Spatial analysis of temperature (BHT/DST) data and consequences for heat-flow determination in sedimentary basins
A. Forster, D. F. Merriam, J.C. Davis
1997, Conference Paper, International Journal of Earth Sciences
Large numbers of bottom-hole temperatures (BHTs) and temperatures measured during drill-stem tests (DSTs) are available in areas explored for hydrocarbons, but their usefulness for estimating geothermal gradients and heat-flow density is limited. We investigated a large data set of BHT and DST measurements taken in boreholes in the American Midcontinent,...
Potential for the Kentucky Dam tailwater of the Tennessee River to serve as a mussel refuge from invading zebra mussels
J. B. Sickel, J.J. Herod, H.N. Blalock
K.S. Cummings, A. C. Buchanan, C. A. Mayer, T.J. Naimo, editor(s)
1997, Conference Paper, Conservation and management of freshwater mussels II : Initiatives for the future
No abstract available....
Landsat-7 Enhanced Thematic Mapper plus radiometric calibration
B. L. Markham, Wayne C. Boncyk, D. L. Helder, J. L. Barker
1997, Canadian Journal of Remote Sensing (23) 318-332
Landsat-7 is currently being built and tested for launch in 1998. The Enhanced Thematic Mapper Plus (ETM+) sensor for Landsat-7, a derivative of the highly successful Thematic Mapper (TM) sensors on Landsats 4 and 5, and the Landsat-7 ground system are being built to provide enhanced radiometric calibration performance. In...
Effects of road management on movement and survival of Roosevelt elk
Eric K. Cole, Michael D. Pope, Robert G. Anthony
1997, Journal of Wildlife Management (61) 1115-1126
Road closures frequently are used to manage for Rocky Mountain elk (Cervus elaphus nelsoni), but no studies have evaluated the effects of limited vehicle access on movements and survival of Roosevelt elk (C. elaphus roosevelti). We studied movements and survival of female Roosevelt elk before Road Management Areas (RMA) were...
A comparison of larval development in the zebra mussels, Dreissena polymorpha, (Bivalvia: Dreissenidae) up to the free-swimming trochophore stage in Tennessee and Ohio River water
D. P. Reed, J.J. Herod, J. B. Sickel
A.F. Scott, S. W. Hamilton, E. W. Chester, D. S. White, editor(s)
1997, Conference Paper, Proceedings of the seventh symposium on the natural history of Lower Tennessee and Cumberland River Valleys
No abstract available....
Estimating millet production for famine early warning: An application of crop simulation modelling using satellite and ground-based data in Burkina Faso
P. K. Thornton, W. T. Bowen, A. C. Ravelo, P. W. Wilkens, G. Farmer, J. Brock, J. E. Brink
1997, Agricultural and Forest Meteorology (83) 95-112
Early warning of impending poor crop harvests in highly variable environments can allow policy makers the time they need to take appropriate action to ameliorate the effects of regional food shortages on vulnerable rural and urban populations. Crop production estimates for the current season can be obtained using crop simulation...
Landsat TM memory effect characterization and correction
D. Helder, W. Boncyk, R. Morfitt
1997, Canadian Journal of Remote Sensing (23) 299-308
Before radiometric calibration of Landsat Thematic Mapper (TM) data can be done accurately, it is necessary to minimize the effects of artifacts present in the data that originate in the instrument's signal processing path. These artifacts have been observed in downlinked image data since shortly after launch of Landsat 4...
Climate change and the detection of trends in annual runoff
G. J. McCabe Jr., D.M. Wolock
1997, Climate Research (8) 129-134
This study examines the statistical likelihood of detecting a trend in annual runoff given an assumed change in mean annual runoff, the underlying year-to-year variability in runoff, and serial correlation of annual runoff. Means, standard deviations, and lag-1 serial correlations of annual runoff were computed for 585 stream gages in...
Sea Otter Enhydra lutris
James L. Bodkin, Brenda E. Ballachey
1997, Report
The sea otter, Enhydra lutris, is the largest member of the Mustelidae family and is the only one which lives entirely in marine waters. Sea otters are unique among marine mammals because, unlike whales, dolphins and seals, they do not have a layer of fat or blubber to keep them...
Modelling root reinforcement in shallow forest soils
Arne E. Skaugset
1997, Thesis
A hypothesis used to explain the relationship between timber harvesting and landslides is that tree roots add mechanical support to soil, thus increasing soil strength. Upon harvest, the tree roots decay which reduces soil strength and increases the risk of management -induced landslides. The technical literature does not adequately support...
Hydrochemical evolution of sodium-sulfate and sodium-chloride groundwater beneath the Northern Chihuahuan Desert, Trans-Pecos, Texas, USA
R.S. Fisher, W. F. Mullican III
1997, Hydrogeology Journal (5) 4-16
Groundwater beneath the northern Chihuahuan Desert, Trans-Pecos, Texas, USA, occurs in both carbonate and siliciclastic aquifers beneath a thick unsaturated zone in shallow Rio Grande alluvium. Groundwater hydrochemical evolution was investigated by analyzing soils, soils leachates, bolson-fill sediments, water from the unsaturated zone, and groundwater from...
A research problem analysis in support of the Cooperative Forest Ecosystem Research (CFER) Program
Jeff P. Smith, Robert E. Gresswell, John P. Hayes
1997, Report
No abstract available....
Polychlorinated biphenyls as probes of biogeochemical processes in rivers
S.A. Fitzgerald, J. J. Steuer
1997, ACS Symposium Series (671) 382-397
A field study was conducted to investigate the use of PCB (polychlorinated biphenyl) congener and homolog assemblages as tracers of biogeochemical processes in the Milwaukee and Manitowoc Rivers in southeastern Wisconsin from 1993 to 1995. PCB congeners in the dissolved and suspended particle phases, along with various algal indicators (algal...
Efficacy of a vacuum benthos sampler for collecting demersal fish eggs from gravel substratum
Carl R. Ruetz III, Cecil A. Jennings
1997, Ecology of Freshwater Fish (6) 241-244
We used two densities of eggs (low=900 eggs/m2; high=5100 eggs/m2) in laboratory experiments to estimate the recovery efficiency of the Brown benthos sampler for collecting fish eggs from gravel substrate and to determine if differences (e. g., 5-fold) in egg density in the substratum could be detected with the sampler....
Tectonic evolution of the central Brooks Range mountain front: Evidence from the Atigun Gorge region
C. G. Mull, R.K. Glenn, K.E. Adams
1997, Journal of Geophysical Research B: Solid Earth (102) 20749-20772
Atigun Gorge, at the northern front of the eastern Endicott Mountains, contains well-exposed rocks of the upper part of the Endicott Mountains allochthon and rocks of the structurally higher Picnic Creek or Ipnavik River allochthon. These allochthons contain rocks as young as Early Cretaceous (Valanginian) and are separated by a...
Land subsidence caused by the East Mesa geothermal field, California, observed using SAR interferometry
D. Massonnet, T. Holzer, H. Vadon
1997, Geophysical Research Letters (24) 901-904
Interferometric combination of pairs of synthetic aperture radar (SAR) images acquired by the ERS-1 satellite maps the deformation field associated with the activity of the East Mesa geothermal plant, located in southern California. SAR interferometry is applied to this flat area without the need of a...
A GIS model to predict black bear habitat use
F.T. Van Manen, M.R. Pelton
1997, Journal of Forestry (95) 6-12
No abstract available....
[Book review] Wild otters, Predation and populations, by Hans Kruuk
J. A. Estes
1997, Journal of Wildlife Management (61) 984-986
Review of: Wild Otters, Predation and Populations. By Hans Kruuk. Oxford University Press, New York, N.Y., USA. 1995. xi + 290pp., 10 chapters, references, index. $55.00 IBSN 0-19-854070-1 (cloth)....
