Photosynthesis of green algal soil crust lichens from arid lands in southern Utah, USA: Role of water content on light and temperature responses of CO2 exchange
Otto L. Lange, Jayne Belnap, Angelika Meyer
1997, Flora (192) 1-15
Biotic soil crusts are a worldwide phenomenon in arid and semi-arid landscapes. Metabolic activity of the poikilohydric organisms found in these crusts is dominated by quick and drastic changes in moisture availability and long periods of drought. Under controlled conditions, we studied the role of water content on photosynthetic...
Migration by radio-tagged pacific golden-plovers from hawaii to Alaska, and their subsequent survival
O.W. Johnson, N. Warnock, M.A. Bishop, A.J. Bennett, P.M. Johnson, R.J. Kienholz
1997, The Auk (114) 521-524
Many Pacific Golden-Plovers (Pluvialis fulva) and other shorebirds winter in the Hawaiian Islands. This is the first landfall for mid-Pacific migrants after overwater flights of 4,000 km or more from Alaska (Johnson et al. 1989, Johnson and Connors 1996). Previous findings (sightings of marked birds and wing-length measurements) showed Alaska...
Upper Snake River white sturgeon biological risk assessment
R. Carmichael, L. Lestelle, L. Mobrand, D. Statler, R. Carter, N. Hoefs, D. Bennet, J. Chandler, K. Lepla, T. Cochnauer, J. Devore, T. Rien, R. McMullin, M.J. Parsley, A. Seamans
1997, Report
No abstract available...
Littoral hydrovolcanic explosions: A case study of lava-seawater interaction at Kilauea Volcano
T. N. Mattox, M. T. Mangan
1997, Journal of Volcanology and Geothermal Research (75) 1-17
A variety of hydrovolcanic explosions may occur as basaltic lava flows into the ocean. Observations and measurements were made during a two-year span of unusually explosive littoral activity as tube-fed pahoehoe from Kilauea Volcano inundated the southeast coastline of the island of Hawai'i. Our observations suggest that explosive interactions require...
Use of a neural network to integrate geoscience information in the classification of mineral deposits and occurrences
Donald A. Singer, Ryoichi Kouda
1997, Conference Paper, Proceedings of Exploration 97: Fourth Decennial International Conference on Mineral Exploration
No abstract available....
Physiological considerations in applying laboratory-determined buoyant densities to predictions of bacterial and protozoan transport in groundwater: Results of in-situ and laboratory tests
R.W. Harvey, D.W. Metge, N. Kinner, N. Mayberry
1997, Environmental Science & Technology (31) 289-295
Buoyant densities were determined for groundwater bacteria and microflagellates (protozoa) from a sandy aquifer (Cape Cod, MA) using two methods: (1) density-gradient centrifugation (DGC) and (2) Stoke's law approximations using sedimentation rates observed during natural-gradient injection and recovery tests. The dwarf (average cell size, 0.3 μm), unattached...
Effects of the landscape on shorebird movements at spring migration stopovers
A.H. Farmer, A.H. Parent
1997, Condor (99) 698-707
We monitored the inter-wetland movements of 115 radio-tagged Pectoral Sandpipers (Calidris melanotos) at three migration stopovers in the Great Plains of North America during April and May from 1992 to 1995. While resident at a stopover, individuals were very localized in their movements. Over 40% of the birds made no...
Evidence for retrovirus infections in green turtles Chelonia mydas from the Hawaiian islands
R.N. Casey, S.L. Quackenbush, Thierry M. Work, G.H. Balazs, P.R. Bowser, J.W. Casey
1997, Diseases of Aquatic Organisms (31) 1-7
Apparently normal Hawaiian green turtles Chelonia mydas and those displaying fibropapillomas were analyzed for infection by retroviruses. Strikingly, all samples were positive for polymerase enhanced reverse transcriptase (PERT) with levels high enough to quantitate by the conventional reverse transcriptase (RT) assay. However, samples of skin, even from asymptomatic turtles, were...
Bryozoa of the Murdock Mountain formation (Wordian, Permian), Leach Mountains, northeastern Nevada
E.H. Gilmour, M.E. McColloch, B. R. Wardlaw
1997, Journal of Paleontology (71) 214-236
A thin limestone tongue in the upper part of the Murdock Mountain Formation of northeastern Nevada contains abundant bryozoans of earliest Wordian age. This bryozoan fauna is close to the Kungurian-Kazanian boundary in Russia. These bryozoans are younger than those found in the Kaibab Formation of southern...
Forecasting drought risks for a water supply storage system using bootstrap position analysis
Gary Tasker, Paul Dunne
1997, Conference Paper, Proceedings, Congress of the International Association of Hydraulic Research, IAHR
Forecasting the likelihood of drought conditions is an integral part of managing a water supply storage and delivery system. Position analysis uses a large number of possible flow sequences as inputs to a simulation of a water supply storage and delivery system. For a given set of operating rules and...
SEA96 - A new predictive relation for earthquake ground motions in extensional tectonic regimes
P. Spudich, Joe B. Fletcher, M. Hellweg, J. Boatwright, C. Sullivan, W. B. Joyner, Thomas C. Hanks, D.M. Boore, Art McGarr, L.M. Baker, A.G. Lindh
1997, Seismological Research Letters (68) 190-198
No abstract available....
Upper campanian (upper cretaceous) ammonites from the Marshalltown Formation-Mount laurel boundary beds in Delaware
W. J. Kennedy, W. A. Cobban
1997, Journal of Paleontology (71) 62-73
New collections from the Marshalltown Formation and basal Mount Laurel Sand along the Chesapeake and Delaware Canal in Delaware clarify the ammonite dating of the interval. The Marshalltown Formation yields Pachydiscus (Pachydiscus) sp., Menuites portlocki (Sharpe, 1855) complexus (Hall and Meek, 1856), a subspecies restricted to the Baculites gregoryensis and <span...
Geochemical characteristics and K-Ar ages of rare-metal bearing pegmatites from the Birimian of southeastern Ghana
C.I. Chalokwu, M.A. Ghazi, E.E. Foord
1997, Journal of African Earth Sciences (24) 1-9
The pegmatite-aplite rocks at Mankwadzi (Ejisimanku Hills) in southeastern Ghana are part of the pegmatite district that extends from Cape Coast to Winneba along the Atlantic coastline. The pegmatites are associated with the Cape Coast granite complex and were intruded during the waning phase of the...
Effect of day length on germination of seeds collected in Alaska
R.V. Densmore
1997, American Journal of Botany (84) 274-278
Day length control can effectively limit seed germination to favorable seasons, but this phenomenon has been studied in relatively few wild plants. I tested species from interior Alaska for day length control of germination under controlled conditions, and I also monitored germination phenology in natural habitats. Unstratified and cold-stratified seeds...
The microbial plankton of Lake Fryxell, southern Victoria Land, Antarctica during the summers of 1992 and 1994
J. Laybourn-Parry, M.R. James, Diane M. McKnight, J. Priscu, S. A. Spaulding, R. Shiel
1997, Polar Biology (17) 54-61
Samples collected from Lake Fryxell, southern Victoria Land, Antarctica in January 1992 and 1994 were analysed for the abundance of bacterioplankton and the diversity and abundance of protistan plankton. At the times of sampling, 14 ciliate species and 10 species of autotrophic flagellate were recorded. The samples contained two species...
Sediment transport pathway in the back of a nearly semienclosed subembayment of San Francisco Bay, California
John C. Warner, David H. Schoellhamer, Jon R. Burau
Forrest M. Holly Jr., Adnan Alsaffar, editor(s)
1997, Conference Paper, Water for a chancing global community: Proceedings of the the 27th Congress of the International Association for Hydraulic Research
Time series measurements of current velocity, depth and suspended-solids concentration (SSC) were used to obtain suspended-solids fluxes (SSF) during the fall at central Honker Bay and Spoonbill Creek. A wind-induced shear stress increases SSF out of Honker Bay through Spoonbill Creek by combining two effects: (1) wind-wave resuspension of bed...
Unusual carbon and oxygen isotropic ratios of ostracodal calcite from last interglacial (Sangamon episode) lacustrine sediment in Raymond Basin, Illinois, USA
B. Brandon Curry, T.F. Anderson, K.C. Lohmann
1997, Journal of Paleolimnology (17) 421-435
The stable isotopic records of ostracode valves deposited during the last interglaciation in Raymond Basin, Illinois, have ??13C and ??18O values as high as +16.5??? and +9.2??? respectively, the highest values yet reported from continental ostracodal calcite. Located in south-central Illinois, Raymond, Pittsburgh, Bald Knob, and Hopwood Farm basins collectively...
Combined-sewer overflow data and methods of sample collection for selected sites, Detroit, Michigan
M.J. Sweat, J.R. Wolf
1997, Open-File Report 96-646
The discharge of untreated sewage is illegal in Michigan unless permitted under Act 245 due to public health concerns. In October, 1992, the Michigan Department of Natural Resources (MDNR, now the Michigan Department of Environmental Quality) issued a discharge permit to Detroit authorizing discharge from the City's 78 combined-sewer overflows...
Shaded-relief map of the San Francisco Bay region, California
Scott E. Graham, Richard J. Pike
1997, Open-File Report 97-745-B
No abstract available....
The influence of seine capture efficiency on fish abundance estimates in the upper Mississippi River
L. E. Holland Bartels, M. R. Dewey
1997, Journal of Freshwater Ecology (12) 101-111
The effects of season, presence of vegetation, and time of day on seine capture efficiency for fish were evaluated using test enclosures in the upper Mississippi River. Overall capture efficiency of the seine haul was 49% (53% during the day and 43% at night). During daytime tests, the efficiency ranged...
Assessment of United States gas hydrate resources
T. S. Collett
1997, ACS Division of Fuel Chemistry, Preprints (42) 457-461
[No abstract available]...
A revised annotated checklist of the Chironomidae (Insecta: Diptera) of the southeastern United States
Broughton A. Caldwell, Patrick L. Hudson, David R. Lenat, David Smith
1997, Transactions of the American Entomological Society (123) 1-53
A revised annotated checklist for the chironomid midges (Diptera: Chironomidae) of the southeastern United States is presented that includes the states of Alabama, Florida, Georgia, North Carolina, South Carolina, and Tennessee. Much of the information concerns occurrence and habitat preference records based upon the authors' data, as well as published...
Contaminant concentrations and biomarker response in great blue heron eggs from 10 colonies on the upper Mississippi River, USA
T. W. Custer, R. K. Hines, M. J. Melancon, D. J. Hoffman, J.K. Wickliffe, J. W. Bickham, J.W. Martin, D.S. Henshel
1997, Environmental Toxicology and Chemistry (16) 260-271
In 1993, great blue heron (Ardea herodias; GBH) eggs were collected from 10 colonies on the upper Mississippi River (UMR). They were then artificially incubated until pipping and analyzed for mercury, selenium, and organochlorines. Livers of embryos were analyzed for hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity and four measures of oxidative...
The use and misuse of the fH2 sensors: A discussion of the paper by Dachs (1994)
I.-M. Chou
1997, Contributions to Mineralogy and Petrology (128) 302-305
No abstract available....
Aerial Photographs and Satellite Images
Water Resources Division, U.S. Geological Survey
1997, Report
Photographs and other images of the Earth taken from the air and from space show a great deal about the planet's landforms, vegetation, and resources. Aerial and satellite images, known as remotely sensed images, permit accurate mapping of land cover and make landscape features understandable on regional, continental, and even...
