Effect of humic substance photodegradation on bacterial growth and respiration in lake water
A.M. Anesio, W. Graneli, G. R. Aiken, D.J. Kieber, K. Mopper
2005, Applied and Environmental Microbiology (71) 6267-6275
This study addresses how humic substance (HS) chemical composition and photoreactivity affect bacterial growth, respiration, and growth efficiency (BGE) in lake water. Aqueous solutions of HSs from diverse aquatic environments representing different dissolved organic matter sources (autochthonous and allochthonous) were exposed to artificial solar UV radiation. These solutions were added...
Identifying calcium sources at an acid deposition-impacted spruce forest: A strontium isotope, alkaline earth element multi-tracer approach
T.D. Bullen, S.W. Bailey
2005, Biogeochemistry (74) 63-99
Depletion of calcium from forest soils has important implications for forest productivity and health. Ca is available to fine feeder roots from a number of soil organic and mineral sources, but identifying the primary source or changes of sources in response to environmental change is problematic. We used strontium...
Transport and fate of nitrate and pesticides: Hydrogeology and riparian zone processes
L.J. Puckett, W.B. Hughes
2005, Journal of Environmental Quality (34) 2278-2292
There is continuing concern over potential impacts of widespread application of nutrients and pesticides on ground- and surface-water quality. Transport and fate of nitrate and pesticides were investigated in a shallow aquifer and adjacent stream, Cow Castle Creek, in Orangeburg County, South Carolina. Pesticide and pesticide degradate concentrations were detected...
Radiated energy and the physics of earthquake faulting
Art McGarr, R.E. Abercrombie, H. Kanamori
2005, Conference Paper, Eos
[No abstract available]...
An integrated view of the chemistry and mineralogy of martian soils
A. S. Yen, Ralf Gellert, C. Schroder, R.V. Morris, J.F. Bell III, A.T. Knudson, B.C. Clark, D. W. Ming, J.A. Crisp, R. E. Arvidson, D. Blaney, J. Bruckner, P. R. Christensen, D.J. DesMarais, P.A. De Souza Jr., T.E. Economou, A. Ghosh, B.C. Hahn, Kenneth E. Herkenhoff, L.A. Haskin, J.A. Hurowitz, B.L. Joliff, J. R. Johnson, G. Klingelhofer, M.B. Madsen, S. M. McLennan, H.Y. McSween, L. Richter, R. Rieder, D. Rodionov, Laurence A. Soderblom, S. W. Squyres, N.J. Tosca, A. Wang, M. Wyatt, J. Zipfel
2005, Nature (436) 49-54
The mineralogical and elemental compositions of the martian soil are indicators of chemical and physical weathering processes. Using data from the Mars Exploration Rovers, we show that bright dust deposits on opposite sides of the planet are part of a global unit and not dominated by the composition of local...
A new method to compute standard-weight equations that reduces length-related bias
K.G. Gerow, R. C. Anderson-Sprecher, W.A. Hubert
2005, North American Journal of Fisheries Management (25) 1288-1300
We propose a new method for developing standard-weight (Ws) equations for use in the computation of relative weight (Wr) because the regression line-percentile (RLP) method often leads to length-related biases in Ws equations. We studied the structural properties of W s equations developed by the RLP method through simulations, identified...
Comparison of sediment grain size characteristics on nourished and un-nourished estuarine beaches and impacts on horseshoe crab habitat, Delaware Bay, New Jersey
N.L. Jackson, D. R. Smith, K.F. Nordstrom
2005, Zeitschrift fur Geomorphologie, Supplementband (141) 31-45
This study was undertaken to determine whether nourished and un-nourished estuarine beaches have conspicuous differences in sediment size and sorting that could affect their value as habitat for horseshoe crabs. Comparisons are made of beach profiles and sediment samples gathered at 0.15 m and 0.30 m depths on the backshore,...
Large-volume, low-δ18O rhyolites of the central Snake River Plain, Idaho, USA
Scott Boroughs, John Wolff, Bill Bonnichsen, Martha Godchaux, Peter Larson
2005, Geology (33) 821-824
The Miocene Bruneau-Jarbidge and adjacent volcanic fields of the central Snake River Plain, southwest Idaho, are dominated by high-temperature rhyolitic tuffs and lavas having an aggregate volume estimated as 7000 km3. Samples from units representing at least 50% of this volume are strongly depleted in 18O, with magmatic feldspar δ18OVSMOW (Vienna standard...
Geology based planning and the aggregate industry -Perspectives from opposite sides of the globe
A.W. Stephens, W. H. Langer
2005, Conference Paper, 2005 SME Annual Meeting: Got Mining - Preprints
In Australia and America, encroachment by conflicting land uses, zoning restrictions, and the "not in my backyard" syndrome make it increasingly difficult to access high-quality aggregate resources located near the market areas. Attempts by government agencies in America to protect aggregate resources for future development have met with varying degrees...
Evolving force balance at Columbia Glacier, Alaska, during its rapid retreat
Shad O’Neel, W.T. Pfeffer, R. Krimmel, M. Meier
2005, Journal of Geophysical Research F: Earth Surface (110)
Changes in driving and resistive stresses play an essential role in governing the buoyancy forces that are important controls on the speed and irreversibility of tidewater glacier retreats. We describe changes in geometry, velocity, and strain rate and present a top-down force balance analysis performed over the lower reach of...
Mineralization, watershed geochemistry, and metals in fish from a Subarctic River, Alaska
L. P. Gough, B. Wang, J.G. Crock, R.R. Seal, P. Weber-Scannell
2005, Conference Paper, World Water Congress 2005: Impacts of Global Climate Change - Proceedings of the 2005 World Water and Environmental Resources Congress
We report on the levels of trace metals and metalloids in Arctic grayling (Thymallus arcticus), an important freshwater sport and subsistence fish in the Fortymile River, east-central Alaska. Functional biogeochemical baseline values and (or) ranges are presented for 38 major- and trace-elements in the muscle (fillet) and liver of 34...
Effects of urbanization on benthic macroinvertebrate assemblages in contrasting environmental settings: Boston, Massachusetts; Birmingham, Alabama; and Salt Lake City, Utah
T. F. Cuffney, H. Zappia, E.M.P. Giddings, J.F. Coles
2005, American Fisheries Society Symposium (2005) 361-407
Responses of invertebrate assemblages along gradients of urban intensity were examined in three metropolitan areas with contrasting climates and topography (Boston, Massachusetts; Birmingham, Alabama; Salt Lake City, Utah). Urban gradients were defined using an urban intensity index (UII) derived from basin-scale population, infrastructure, land-use, land-cover, and socioeconomic characteristics. Responses based...
DUCKS: Low cost thermal monitoring units for near-vent deployment
A. Harris, D. Pirie, K. Horton, H. Garbeil, E. Pilger, H. Ramm, R. Hoblitt, C. Thornber, M. Ripepe, E. Marchetti, P. Poggi
2005, Journal of Volcanology and Geothermal Research (143) 335-360
During 1999 we designed and tested a thermal monitoring system to provide a cheap, robust, modular, real-time system capable of surviving the hostile conditions encountered proximal to active volcanic vents. In November 2000 the first system was deployed at Pu'u...
Factors affecting settling, survival, and viability of black bears reintroduced to Felsenthal National Wildlife Refuge, Arkansas
B.J. Wear, R. Eastridge, J. D. Clark
2005, Wildlife Society Bulletin (33) 1363-1374
We used radiotelemetry and population modeling techniques to examine factors related to population establishment of black bears (Ursus americanus) reintroduced to Felsenthal National Wildlife Refuge (NWR), Arkansas. Our objectives were to determine whether settling (i.e., establishment of a home range at or near the release site), survival, recruitment, and population...
Viscoelasticity, postseismic slip, fault interactions, and the recurrence of large earthquakes
A.J. Michael
2005, Bulletin of the Seismological Society of America (95) 1594-1603
The Brownian Passage Time (BPT) model for earthquake recurrence is modified to include transient deformation due to either viscoelasticity or deep post seismic slip. Both of these processes act to increase the rate of loading on the seismogenic fault for some time after a large event. To approximate these effects,...
Distribution and abundance of nonnative fishes in streams of the western United States
C.B. Schade, Scott A. Bonar
2005, North American Journal of Fisheries Management (25) 1386-1394
This report presents data from one of the largest standardized stream surveys conducted in he western United States, which shows that one of every four individual fish in streams of 12 western states are nonnative. The states surveyed included Arizona, California, Colorado, Idaho, Montana, Nevada, North Dakota, Oregon, South Dakota,...
Overview of recent DNA vaccine development for fish
Gael Kurath
Midtlyng P.J.M., editor(s)
2005, Conference Paper, Developments in Biologicals
Since the first description of DNA vaccines for fish in 1996, numerous studies of genetic immunisation against the rhabdovirus pathogens infectious haematopoietic necrosis virus (IHNV) and viral haemorrhagic septicaemia virus (VHSV) have established their potential as both highly efficacious biologicals and useful basic research tools. Single small doses of rhabdovirus...
An individual-based modeling approach to spawning-potential per-recruit models: An application to blue crab (Callinectes sapidus) in Chesapeake Bay
D.B. Bunnell, T.J. Miller
2005, Canadian Journal of Fisheries and Aquatic Sciences (62) 2560-2572
An individual-based modeling approach to estimate biological reference points for blue crabs (Callinectes sapidus) in Chesapeake Bay offered several advantages over conventional models: (i) known individual variation in size and growth rate could be incorporated, (ii) the underlying discontinuous growth pattern could be simulated, and (iii) the complexity of the...
Effective discharge analysis of ecological processes in streams
Martin W. Doyle, Emily H. Stanley, David L. Strayer, Robert B. Jacobson, John C. Schmidt
2005, Water Resources Research (41)
Discharge is a master variable that controls many processes in stream ecosystems. However, there is uncertainty of which discharges are most important for driving particular ecological processes and thus how flow regime may influence entire stream ecosystems. Here the analytical method of effective discharge from fluvial geomorphology is used to...
Development of a solenoid pumped in situ zinc analyzer for environmental monitoring
T.P. Chapin, R. B. Wanty
2005, Analytica Chimica Acta (543) 199-208
A battery powered submersible chemical analyzer, the Zn-DigiScan (Zn Digital Submersible Chemical Analyzer), has been developed for near real-time, in situ monitoring of zinc in aquatic systems. Microprocessor controlled solenoid pumps propel sample and carrier through an anion exchange column to separate zinc from interferences, add colorimetric reagents, and propel...
Evolution of large body size in abalones (Haliotis): Patterns and implications
J. A. Estes, D. R. Lindberg, C. Wray
2005, Paleobiology (31) 591-606
Kelps and other fleshy macroalgae - dominant reef-inhabiting organisms in cool - seasmay have radiated extensively following late Cenozoic polar cooling, thus triggering a chain of evolutionary change in the trophic ecology of nearshore temperate ecosystems. We explore this hypothesis through an analysis of body size in the abalones (Gastropoda;...
Comparison of shelf currents off central California prior to and during the 1997-1998 El Nino
H. F. Ryan, M.A. Noble
2005, Continental Shelf Research (25) 1787-1804
Moored current, temperature, salinity, and pressure data were collected at three sites that transect the narrow continental shelf offshore of Davenport, CA, starting in August 1996 and continuing to the spring of 1998. This data set allowed a comparison of oceanographic conditions prior to (8/96-3/97) and during (8/97-3/98) the last...
Development of a subunit vaccine for infectious pancreatic necrosis virus using a baculovirus insect/larvae system
R.B. Shivappa, P. E. McAllister, G.H. Edwards, N. Santi, O. Evensen, V.N. Vakharia
Midtlyng P.J.M., editor(s)
2005, Conference Paper, Developments in Biologicals
Various attempts to develop a vaccine against infectious pancreatic necrosis virus (IPNV) have not yielded consistent results. Thus, at present, no commercial vaccine is available that can be used with confidence to immunize fry of salmon and trout. We generated a cDNA clone of the large genome segment A of...
Eco-informatics for decision makers advancing a research agenda
J.B. Cushing, T. Wilson, L. Brandt, V. Gregg, S. Spengler, A. Borning, L. Delcambre, G. Bowker, Mike Frame, J. Fulop, C. Hert, E. Hovy, J. Jones, E. Landis, J.L. Schnase, C. Schweik, W. Sonntag
Ludascher B.Raschid L., editor(s)
2005, Conference Paper, Lecture Notes in Bioinformatics (Subseries of Lecture Notes in Computer Science)
Resource managers often face significant information technology (IT) problems when integrating ecological or environmental information to make decisions. At a workshop sponsored by the NSF and USGS in December 2004, university researchers, natural resource managers, and information managers met to articulate IT problems facing ecology and environmental decision makers. Decision...
North American Commission on stratigraphic nomenclature
R. M. Easton, J.O. Jones, A.C. Lenz, Ismael Ferrusquia-Villafranca, E. A. Mancini, Bruce R. Wardlaw, Lucy E. Edwards, B.R. Pratt
2005, American Association of Petroleum Geologists Bulletin (89) 1459-1464
No abstract available....
