An exploratory investigation of the landscape-lake interface: Land cover controls over consumer N and C isotopic composition in Lake Michigan rivermouths
James H. Larson, William B. Richardson, Jonathan M. Vallazza, J. C. Nelson
2012, Journal of Great Lakes Research (38) 610-619
Rivermouth ecosystems are areas where tributary waters mix with lentic near-shore waters and provide habitat for many Laurentian Great Lakes fish and wildlife species. Rivermouths are the interface between terrestrial activities that influence rivers and the ecologically important nearshore. Stable isotopes of nitrogen (N) and carbon (C) in consumers were...
The native Florida Green Watersnak, Nerodia floridana (Goff 1936) , preying upon the nonindigenous African Jewelfish, Hemichromis letourneuxi Sauvage 1880, in Florida.
Kenneth L. Krysko, Stephen J. Walsh, Robert H. Robins
2012, IRCF Reptiles & Amphibians (19) 161-162
No abstract available...
Using hydrogeology to identify the source of groundwater to Montezuma Well, a natural spring in central Arizona: part 1
Raymond H. Johnson, Ed H. DeWitt, L. Rick Arnold
2012, Environmental Earth Sciences (67) 1821-1835
Montezuma Well is a natural spring located within a “sinkhole” in the desert environment of the Verde Valley in Central Arizona. It is managed by the National Park Service as part of Montezuma Castle National Monument. Because of increasing development of groundwater in the area, this research was undertaken to...
Measuring the orthogonality error of coil systems
B. Heilig, A. Csontos, K. Pajunpaa, Tim White, B. St. Louis, D. Calp
2012, Proceedings of the XVth IAGA Workshop on Geomagnetic Observatory Instruments 42-45
Recently, a simple method was proposed for the determination of pitch angle between two coil axes by means of a total field magnetometer. The method is applicable when the homogeneous volume in the centre of the coil system is large enough to accommodate the total field sensor. Orthogonality of calibration...
Sulfur, carbon, hydrogen, and oxygen isotope geochemistry of the Idaho cobalt belt
Craig A. Johnson, Arthur A. Bookstrom, John F. Slack
2012, Economic Geology (107) 1207-1221
Cobalt-copper ± gold deposits of the Idaho cobalt belt, including the deposits of the Blackbird district, have been analyzed for their sulfur, carbon, hydrogen, and oxygen isotope compositions to improve the understanding of ore formation. Previous genetic hypotheses have ranged widely, linking the ores to the sedimentary or diagenetic history...
Changing climate, changing forests: the impacts of climate change on forests of the northeastern United States and eastern Canada
Lindsey Rustad, John Campbell, Jeffrey S. Dukes, Thomas Huntington, Kathy Fallon Lambert, Jacqueline Mohan, Nicholas Rodenhouse
2012, General Technical Report NRS-99
Decades of study on climatic change and its direct and indirect effects on forest ecosystems provide important insights for forest science, management, and policy. A synthesis of recent research from the northeastern United States and eastern Canada shows that the climate of the region has become warmer and wetter over...
Sources and sinks of nitrogen and phosphorus to a deep, oligotrophic lake, Lake Crescent, Olympic National Park, Washington
P.W. Moran, S.E. Cox, S.S. Embrey, R.L. Huffman, T. D. Olsen, S.C. Fradkin
2012, Scientific Investigations Report 2012-5107
Lake Crescent, in Olympic National Park in the northwest corner of Washington State is a deep-water lake renowned for its pristine water quality and oligotrophic nature. To examine the major sources and sinks of nutrients (as total nitrogen, total phosphorus, and dissolved nitrate), a study was conducted in the Lake...
Pacific salmon (Oncorhynchus spp.) runs and consumer fitness: growth and energy storage in stream-dwelling salmonids increase with salmon spawner density
Daniel J. Rinella, Mark S. Wipfli, Craig A. Stricker, Ron A. Heintz, Matthew J. Rinella
2012, Canadian Journal of Fisheries and Aquatic Sciences (69) 73-84
We examined how marine-derived nutrients (MDN), in the form of spawning Pacific salmon, influenced the nutritional status and δ15N of stream-dwelling fishes. We sampled juvenile coho salmon (Oncorhynchus kisutch) and Dolly Varden (Salvelinus malma) during spring and fall from 11 south-central Alaskan streams that ranged widely in spawning salmon biomass...
Reducing fungal infections and testing tag loss in juvenile Pacific lampreys implanted with passive integrated transponders.
H.E. Christiansen, L.P. Gee, M.G. Mesa
2012, Report
Pacific lamprey Entosphenus tridentatus are facing severe population declines, yet little is known about juvenile lamprey passage, life history, or adult return rates because until now, these small fish could not be tagged for unique identification of live individuals. Previously, we developed a simple and effective method for tagging juvenile...
Mississippi Sound
Lawrence R. Handley, Kathryn A. Spear, Ali Leggett, Cindy A. Thatcher
2012, Report, Emergent wetlands status and trends in the northern Gulf of Mexico: 1950-2010
The Mississippi Sound is the primary body of water off the Mississippi Coast, extending from Lake Borgne, La. in the west to Mobile Bay, Ala. in the east and bordered by the barrier islands--Cat, Ship, Horn, Petit Bois, and Dauphin Islands--of Gulf Islands National Seashore to the south (Figure 1)....
Intercalibration of radioisotopic and astrochronologic time scales for the Cenomanian-Turonian boundary interval, western interior Basin, USA
S.R. Meyers, S.E. Siewert, B. S. Singer, B.B. Sageman, D.J. Condon, J. D. Obradovich, B.R. Jicha, David A. Sawyer
2012, Geology (40) 7-10
We develop an intercalibrated astrochronologic and radioisotopic time scale for the Cenomanian-Turonian boundary (CTB) interval near the Global Stratotype Section and Point in Colorado, USA, where orbitally influenced rhythmic strata host bentonites that contain sanidine and zircon suitable for 40Ar/39Ar and U-Pb dating. Paired 40Ar/39Ar and U-Pb ages are determined from four...
Hydrogen isotope investigation of amphibole and biotite phenocrysts in silicic magmas erupted at Lassen Volcanic Center, California
S.J. Underwood, T.C. Feeley, M.A. Clynne
2012, Journal of Volcanology and Geothermal Research (227-228) 32-49
Hydrogen isotope ratio, water content and Fe3 +/Fe2 + in coexisting amphibole and biotite phenocrysts in volcanic rocks can provide insight into shallow pre- and syn-eruptive magmatic processes such as vesiculation, and lava drainback with mixing into less devolatilized magma that erupts later in a volcanic sequence. We studied four...
Assessment of urbanization patterns and trends in the Gulf of Mexico region of the southeast United States with Landsat and nighttime lights imagery
George Z. Xian, Collin G. Homer
2012, Book chapter, Advances in mapping from remote sensor imagery
No abstract available....
Sex difference in polybrominated diphenyl ether concentrations of walleyes
Charles P. Madenjian, Autumn W. Trombka, Richard R. Rediske, David J. Jude, James P. O'Keefe
2012, Journal of Great Lakes Research (38) 167-175
Polybrominated diphenyl ether (PBDE) concentrations were determined for mature male and mature female walleyes (Sander vitreus) sampled from the Saginaw Bay population during 2007. PBDE concentrations in prey fish caught in the Saginaw River, the primary tributary to Saginaw Bay, and in Saginaw Bay during 2005 and 2007 also were...
Preliminary physical stratigraphy, biostratigraphy, and geophysical data of the USGS South Dover Bridge Core, Talbot County, Maryland
Wilma B. Aleman Gonzalez, David S. Powars, Ellen Seefelt, Lucy E. Edwards, Jean M. Self-Trail, Colleen T. Durand, Arthur P. Schultz, Peter P. McLaughlin
2012, Open-File Report 2012-1218
The South Dover Bridge (SDB) corehole was drilled in October 2007 in Talbot County, Maryland. The main purpose for drilling this corehole was to characterize the Upper Cretaceous and Paleogene lithostratigraphy and biostratigraphy of the aquifers and confining units of this region. The data obtained from this core also will...
The population structure of Escherichia coli isolated from subtropical and temperate soils
Muruleedhara N. Byappanahalli, Tao Yan, Matthew J. Hamilton, Satoshi Ishii, Roger S. Fujioka, Richard L. Whitman, Michael J. Sadowsky
2012, Science of the Total Environment (417-418) 273-279
While genotypically-distinct naturalized Escherichia coli strains have been shown to occur in riparian soils of Lake Michigan and Lake Superior watersheds, comparative analyses of E. coli populations in diverse soils across a range of geographic and climatic conditions have not been investigated. The main objectives of this study were to:...
Methods
Jonathan Bart, Victoria Johnston, Paul A. Smith, Ann Manning, Jennie Rausch, Stephen Brown
Jonathan Bart, Victoria Johnston, editor(s)
2012, Book chapter, Arctic shorebirds in North America: A decade of monitoring
Detecting declines in population size is one of the highest priorities of the shorebird initiatives in Canada and the United States. The quantitative goal is 80% power to detect a 50% decline, occurring during no more than 20 years, with a significance level of 0.15, using a two-tailed test, and...
Land-cover change detection
Xuexia Chen, Chandra Giri, James Vogelmann
2012, Book chapter, Remote Sensing of Land Use and Land Cover
Land cover is the biophysical material on the surface of the earth. Land-cover types include grass, shrubs, trees, barren, water, and man-made features. Land cover changes continuously. The rate of change can be either dramatic and abrupt, such as the changes caused by logging, hurricanes and fire, or subtle and...
Shorebird surveys in western Alaska
Brian J. McCaffery, Jonathan Bart, Catherine Wightman, David J. Krueper
2012, Book chapter, Arctic shorebirds in North America: A decade of monitoring
Surveys for breeding shorebirds were conducted during 2001-2002 in four National Wildlife Refuges (NWRs) in western Alaska - Alaska Maritime, Alaska Peninsula, Yukon Delta and Selawik. The sizes of our study areas on and adjacent to these four refuges were 9,243 km2, 24,493 km2, 853 km2, and 15,170 km2, respectively....
Associations between forest fragmentation patterns and geneticstructure in Pfrimer’s Parakeet (Pyrrhura pfrimeri), an endangered endemic to central Brazil’s dry forests
Susan M. Haig, Leonard F. Miller, Carlos Bianchi, Thomas D. Mullins
2012, Conservation Genetics (13)
When habitat becomes fragmented, populations of species may become increasingly isolated. In the absence of habitat corridors, genetic structure may develop and populations risk reductions in genetic diversity from increased genetic drift and inbreeding. Deforestation of the Cerrado biome of Brazil, particularly of the dry forests within the Parana˜ River...
A comparison of selected parametric and imputation methods for estimating snag density and snag quality attributes
Bianca Eskelson, Joan Hagar, Hailemariam Temesgen
2012, Forest Ecology and Management 26-34
Snags (standing dead trees) are an essential structural component of forests. Because wildlife use of snags depends on size and decay stage, snag density estimation without any information about snag quality attributes is of little value for wildlife management decision makers. Little work has been done to develop models that...
Physiological ecology of desert biocrust moss following 10 years exposure to elevated CO2: Evidence for enhanced photosynthetic thermotolerance
Kirsten K. Coe, Jayne Belnap, Edmund E. Grote, Jed P. Sparks
2012, Physiologia Plantarum (144) 346-356
In arid regions, biomes particularly responsive to climate change, mosses play an important biogeochemical role as key components of biocrusts. Using the biocrust moss Syntrichia caninervis collected from the Nevada Desert Free Air CO2 Enrichment Facility, we examined the physiological effects of 10 years of exposure to elevated CO2, and...
Net trophic transfer efficiencies of polychlorinated biphenyl congeners to lake trout (Salvelinus namaycush) from its prey
Charles P. Madenjian, Solomon R. David, Richard R. Rediske, James P. O’Keefe
2012, Environmental Toxicology and Chemistry (31) 2821-2827
Lake trout (Salvelinus namaycush) were fed bloater (Coregonus hoyi) in eight laboratory tanks over a 135-d experiment. At the start of the experiment, four to nine fish in each tank were sacrificed, and the concentrations of 75 polychlorinated biphenyl (PCB) congeners within these fish were determined. Polychlorinated biphenyl congener concentrations...
In-ground disposal of human sewage can contaminate nearshore waters and reefs with bacteria and viruses
Erin K. Lipp, Dale W. Griffin, J.C. Futch
2012, Book chapter, Tropical connections: south Florida's marine environment
No abstract available....
Over 100 years of environmental change recorded by foraminifers and sediments in a large Gulf of Mexico estuary, Mobile Bay, AL, USA
Lisa E. Osterman, Christopher G. Smith
2012, Estuarine and Continental Shelf Science (115) 345-358
The marine microfauna of Mobile Bay has been profoundly influenced by the development and expansion of the primary shipping channel over the last ∼100 years. Foraminifers and sediments from seven box cores with excess lead-210 chronology document that channel <a...
