Precipitation zones of west-central Nevada
Thomas J. Lopes, Rose L. Medina
2007, Journal of the Nevada Water Resources Association (4) 1-18
Whether Nevada can sustain its fast rate of growth depends in part on accurately quantifying the amount of water that is available, including precipitation. The Precipitation-Zone Method (PZM) is a way of estimating mean annual precipitation at any point. The PZM was developed using data from west-central Nevada and northeastern...
Differential expression of gill Na+,K+-ATPaseα - and β-subunits, Na+,K+,2Cl- cotransporter and CFTR anion channel in juvenile anadromous and landlocked Atlantic salmon Salmo salar
Tom O. Nilsen, Lars O.E. Ebbesson, Steffen S. Madsen, Stephen D. McCormick, Eva Andersson, Bjorn Thrandur Bjornsson, Patrick Prunet, Sigurd O. Stefansson
2007, Journal of Experimental Biology (210) 2885-2896
This study examines changes in gill Na+,K+-ATPase (NKA) α- and β-subunit isoforms, Na+,K+,2Cl- cotransporter (NKCC) and cystic fibrosis transmembrane conductance regulator (CFTR I and II) in anadromous and landlocked strains of Atlantic salmon during parr-smolt transformation, and after seawater (SW) transfer in May/June. Gill NKA activity increased from February through April,...
Bacteriological water quality in and around Lake Pontchartrain following Hurricanes Katrina and Rita
Dennis K. Demcheck, Donald M. Stoeckel, Rebecca N. Bushon, David S. Blehert, Daniel J. Hippe
2007, Circular 1306-7H
Following the Louisiana landfalls of Katrina on August 29 and Rita on September 24, 2005, the local population and the American public were concerned about the effects the hurricanes might have on water quality in Lake Pontchartrain. The lake is a major recreational resource for the region and an important...
Three new percid fishes (Percidae: Percina) from the Mobile Basin drainage of Alabama, Georgia, and Tennessee
J.D. Williams, D.A. Neely, S. J. Walsh, N.M. Burkhead
2007, Zootaxa 1-28
Three new species of Percina are described from upland drainages of the Mobile Basin. Two of the three species are narrowly distributed: P. kusha, the Bridled Darter, is currently known only from the Conasauga River drainage in Georgia and Tennessee and Etowah River drainage in Georgia, both tributaries of the...
Controls on the variability of net infiltration to desert sandstone
Victor M. Heilweil, Tim S. McKinney, Michael S. Zhdanov, Dennis E. Watt
2007, Water Resources Research (43)
As populations grow in arid climates and desert bedrock aquifers are increasingly targeted for future development, understanding and quantifying the spatial variability of net infiltration becomes critically important for accurately inventorying water resources and mapping contamination vulnerability. This paper presents a conceptual model of net infiltration to desert sandstone and...
Detection of viral hemorrhagic septicemia in round gobies in New York State (USA) waters of Lake Ontario and the St. Lawrence River
G.H. Groocock, R.G. Getchell, G.A. Wooster, K.L. Britt, W.N. Batts, J. R. Winton, R.N. Casey, J.W. Casey, P.R. Bowser
2007, Diseases of Aquatic Organisms (76) 187-192
In May 2006 a large mortality of several thousand round gobies Neogobius melanostomus (Pallas, 1814) occurred in New York waters of the St. Lawrence River and Lake Ontario. Necropsies of sampled fish from these areas showed pallor of the liver and gills, and hemorrhagic areas in many organs. Histopathologic examination...
Heterogeneity of soil nutrients and subsurface biota in a dryland ecosystem
D.C. Housman, C.M. Yeager, B.J. Darby, R.L. Sanford Jr., C.R. Kuske, D.A. Neher, J. Belnap
2007, Soil Biology and Biochemistry (39) 2138-2149
Dryland ecosystems have long been considered to have a highly heterogeneous distribution of nutrients and soil biota, with greater concentrations of both in soils under plants relative to interspace soils. We examined the distribution of soil resources in two plant communities (dominated by either the shrub Coleogyne ramosissima or the...
Emoia atrocostata (Littoral skink)
R.N. Reed, G.H. Rodda, T.J. Hinkle
2007, Herpetological Review (38) 100-100
No abstract available....
Potential consequences of saltwater intrusion associated with Hurricanes Katrina and Rita
Gregory D. Steyer, Brian C. Perez, Sarai C. Piazza, Glenn Suir
2007, Circular 1306-6C
Hurricanes Katrina and Rita pushed salt water from the Gulf of Mexico well inland into freshwater marsh communities in coastal Louisiana. This paper describes the spatial extent of saltwater intrusion and provides an initial assessment of impacts (salt stress) to coastal marsh vegetation communities....
Data access and dissemination for emergency response and long-term recovery efforts related to Hurricanes Katrina and Rita
Scott Wilson, Chris Cretini
2007, Circular 1306-4B
The U.S. Geological Survey's (USGS) National Wetlands Research Center (NWRC) responded to Hurricanes Katrina and Rita by providing geospatial support to Federal, State, and local partners. The NWRC used its data and information management systems to deliver aerial photography and maps to emergency responders in a time of critical need....
GIS for the Gulf: A reference database for hurricane-affected areas
Dave Greenlee
2007, Circular 1306-4C
A week after Hurricane Katrina made landfall in Louisiana, a collaboration among multiple organizations began building a database called the Geographic Information System for the Gulf, shortened to "GIS for the Gulf," to support the geospatial data needs of people in the hurricane-affected area. Data were gathered from diverse sources...
Source mechanics for monochromatic icequakes produced during iceberg calving at Columbia Glacier, AK
Shad O’Neel, W.T. Pfeffer
2007, Geophysical Research Letters (34)
Seismograms recorded during iceberg calving contain information pertaining to source processes during calving events. However, locally variable material properties may cause signal distortions, known as site and path effects, which must be eliminated prior to commenting on source mechanics. We applied the technique of horizontal/vertical spectral ratios to passive seismic...
In vivo effects of bisphenol A in laboratory rodent studies
Cathy A. Richter, Linda S. Birnbaum, Francesca Farabollini, Retha R. Newbold, Beverly S. Rubin, Chris E. Talsness, John G. Vandenbergh, Debby R. Walser-Kuntz, Frederick S. vom Saal
2007, Reproductive Toxicology (24) 199-224
Concern is mounting regarding the human health and environmental effects of bisphenol A (BPA), a high-production-volume chemical used in synthesis of plastics. We have reviewed the growing literature on effects of low doses of BPA, below 50 mg/(kg day), in laboratory exposures with mammalian model organisms. Many, but not all, effects of...
Seabirds as indicators of marine food supplies: Cairns revisited
John F. Piatt, Ann Harding, Michael T. Shultz, Suzann G. Speckman, Thomas I. van Pelt, Gary S. Drew, Arthur B. Kettle
2007, Marine Ecology Progress Series (352) 221-234
In his seminal paper about using seabirds as indicators of marine food supplies, Cairns (1987, Biol Oceanogr 5:261–271) predicted that (1) parameters of seabird biology and behavior would vary in curvilinear fashion with changes in food supply, (2) the threshold of prey density over which birds responded would be different...
Birds of the Rio Grande and other riparian habitats of Western Webb County, Texas
Marc C. Woodin, Mary Kay Skoruppa, Gene W. Blacklock, Graham C. Hickman
2007, Bulletin of the Texas Ornithological Society (40) 67-80
We conducted 164 diurnal morning point counts in 1997 and 89 nocturnal point counts in 1998 along the Rio Grande and at other riparian habitats on remote ranchland in northwestern Webb County. We subsequently conducted 94 diurnal morning and 37 nocturnal point counts in 1999 on public lands along the...
Spatial and temporal structure of macroinvertebrate assemblages, San Francisco Bay salt ponds
A.K. Miles, S.E. Spring, M.A. Ricca, J.T. Takekawa, N.D. Athearn, D. H. Schoellhamer
2007, Conference Paper, Society of Wetland Scientists International Conference
No abstract available....
Restoring resilience to the Gulf of Mexico coast
Gregory J. Smith
2007, Circular 1306-1A
Hurricane Katrina and its destructive aftermath in 2005 were unprecedented. Hurricanes Dennis, Rita, and Wilma were also powerful hurricanes affecting the Gulf of Mexico that year. These storms highlighted the need to integrate science that supports restoration of natural landscapes with intelligent coastal planning. The following essay describes both the...
Mercury in sediments, Alviso and Eden Landing salt ponds, south San Francisco Bay, California
A.K. Miles, M.A. Ricca, S.E. Spring, C. Morris, C. Wilcox, T. Maurer
2007, Conference Paper, Proceedings, Society of Wetland Scientists International Conference
No abstract available....
Potential ecotoxicological significance of elevated concentrations of strontium in eggshells of passerine birds
Miguel A. Mora, Robert J. Taylor, Bryan L. Brattin
2007, Condor (109) 199-205
We investigated the occurrence and potential ecotoxicological significance of elevated concentrations of strontium (Sr) in eggshells of nine passerine birds from four regions in Arizona. Concentrations of Sr in eggshells ranged from 70 to 1360 µg g−1 dry weight (overall mean = 684 ± 345 SD µg g−1 dw) for the four...
A multiple-approach radiometric age estimate for the Rotoiti and Earthquake Flat eruptions, New Zealand, with implications for the MIS 4/3 boundary
C. J. N. Wilson, D.A. Rhoades, M. A. Lanphere, A.T. Calvert, Bruce F. Houghton, S.D. Weaver, J. W. Cole
2007, Quaternary Science Reviews (26) 1861-1870
Pyroclastic fall deposits of the paired Rotoiti and Earthquake Flat eruptions from the Taupo Volcanic Zone (New Zealand) combine to form a widespread isochronous horizon over much of northern New Zealand and the southwest Pacific. This horizon is important for correlating climatic and...
Sea level fluctuations in central California at subtidal to decadal and longer time scales with implications for San Francisco Bay, California
H. F. Ryan, M.A. Noble
2007, Estuarine, Coastal and Shelf Science (73) 538-550
Sea level elevations from near the mouth of San Francisco Bay are used to describe the low-frequency variability of forcing of the coastal ocean on the Bay at a variety of temporal scales. About 90% of subtidal fluctuations in sea level...
Three distinct clades of cultured heterocystous cyanobacteria constitute the dominant N2-fixing members of biological soil crusts of the Colorado Plateau, USA
C.M. Yeager, J. L. Kornosky, R.E. Morgan, E.C. Cain, F. Garcia-Pichel, D.C. Housman, J. Belnap, C.R. Kuske
2007, FEMS Microbiology Ecology (60) 85-97
The identity of the numerically dominant N2-fixing bacteria in biological soil crusts of the Colorado Plateau region and two outlying areas was determined using multiple approaches, to link the environmental diversity of nifH gene sequences to cultured bacterial isolates from the regions. Of the nifH sequence-types detected in soil crusts...
Nitrate retention in riparian ground water at natural and elevated nitrate levels in North Central Minnesota
J.H. Duff, A. P. Jackman, F.J. Triska, R.W. Sheibley, R.J. Avanzino
2007, Journal of Environmental Quality (36) 343-353
The relationship between local ground water flows and NO3− transport to the channel was examined in three well transects from a natural, wooded riparian zone adjacent to the Shingobee River, MN. The hillslope ground water originated as recharge from intermittently grazed pasture up slope of the site. In the hillslope...
Determining metal assimilation efficiency in aquatic invertebrates using enriched stable metal isotope tracers
Marie Noele Croteau, Samuel N. Luoma, B. Pellet
2007, Aquatic Toxicology (83) 116-125
We employ a novel approach that combines pulse-chase feeding and multi-labelled stable isotopes to determine gut passage time (GPT), gut retention time (GRT), food ingestion rate (IR) and assimilation efficiency (AE) of three trace elements for a freshwater gastropod. Lettuce isotopically enriched in 53Cr, 65Cu and 106Cd was fed for 2 h to Lymnaea stagnalis....
Authigenic carbonate formation at hydrocarbon seeps in continental margin sediments: A comparative study
T.H. Naehr, P. Eichhubl, V.J. Orphan, M. Hovland, C. K. Paull, W. Ussler III, T.D. Lorenson, H. Gary Greene
2007, Deep-Sea Research Part II: Topical Studies in Oceanography (54) 1268-1291
Authigenic carbonates from five continental margin locations, the Eel River Basin, Monterey Bay, Santa Barbara Basin, the Sea of Okhotsk, and the North Sea, exhibit a wide range of mineralogical and stable isotopic compositions. These precipitates include aragonite, low- and high-Mg calcite, and dolomite. The carbon isotopic composition of carbonates...
