Petroleum prospectivity of the Canada Basin, Arctic Ocean
Arthur Grantz, Patrick E. Hart
2012, Marine and Petroleum Geology (30) 126-143
Reconnaissance seismic reflection data indicate that Canada Basin is a >700,000 sq. km. remnant of the Amerasia Basin of the Arctic Ocean that lies south of the Alpha-Mendeleev Large Igneous Province, which was constructed across the northern part of the Amerasia Basin between about 127 and 89–83.5 Ma. Canada Basin...
Presence of avian influenza viruses in waterfowl and wetlands during summer 2010 in California: Are resident birds a potential reservoir?
V. Henaux, M.D. Samuel, Robert J. Dusek, J. P. Fleskes, Hon S. Ip
2012, PLoS ONE (7)
Although wild waterfowl are the main reservoir for low pathogenic avian influenza viruses (LPAIv), the environment plays a critical role for the circulation and persistence of AIv. LPAIv may persist for extended periods in cold environments, suggesting that waterfowl breeding areas in the northern hemisphere may be an important reservoir...
Hydrological effects of the increased CO2 and climate change in the Upper Mississippi River Basin using a modified SWAT
Y. Wu, S. Liu, O. I. Abdul-Aziz
2012, Climatic Change (110) 977-1003
Increased atmospheric CO2 concentration and climate change may significantly impact the hydrological and meteorological processes of a watershed system. Quantifying and understanding hydrological responses to elevated ambient CO2 and climate change is, therefore, critical for formulating adaptive strategies for an appropriate management of water resources. In this study, the Soil...
Migration of Sakhalin taimen (Parahucho perryi): Evidence of freshwater resident life history types
Christian E. Zimmerman, P.S. Rand, M. Fukushima, S.F. Zolotukhin
2012, Environmental Biology of Fishes (93) 223-232
Sakhalin taimen (Parahucho perryi) range from the Russian Far East mainland along the Sea of Japan coast, and Sakhalin, Kuril, and Hokkaido Islands and are considered to primarily be an anadromous species. We used otolith strontium-to-calcium ratios (Sr/Ca) to determine the chronology of migration between freshwater and saltwater and identify...
Isotopically modified nanoparticles for enhanced detection in bioaccumulation studies
S.K. Misra, A. Dybowska, D. Berhanu, Marie Noele Croteau, Samuel N. Luoma, A.R. Boccaccini, E. Valsami-Jones
2012, Environmental Science & Technology (46) 1216-1222
This work presents results on synthesis of isotopically enriched (99% 65Cu) copper oxide nanoparticles and its application in ecotoxicological studies. 65CuO nanoparticles were synthesized as spheres (7 nm) and rods (7 × 40 nm). Significant differences were observed between the reactivity and dissolution of spherical and rod shaped nanoparticles. The extreme sensitivity...
The impact of biotic/abiotic interfaces in mineral nutrient cycling: A study of soils of the Santa Cruz chronosequence, California
A. F. White, M. S. Schulz, D.V. Vivit, T.D. Bullen, J. Fitzpatrick
2012, Geochimica et Cosmochimica Acta (77) 62-85
Biotic/abiotic interactions between soil mineral nutrients and annual grassland vegetation are characterized for five soils in a marine terrace chronosequence near Santa Cruz, California. A Mediterranean climate, with wet winters and dry summers, controls the annual cycle of plant growth and litter decomposition, resulting in net above-ground productivities of...
Ecological controls on the shell geochemistry of pink and white Globigerinoides ruber in the northern Gulf of Mexico: implications for paleoceanographic reconstruction
Julie N. Richey, Richard Z. Poore, Benjamin P. Flower, David J. Hollander
2012, Marine Micropaleontology (82-83) 28-37
We evaluate the relationship between foraminiferal test size and shell geochemistry (δ13C, δ18O, and Mg/Ca) for two of the most commonly used planktonic foraminifers for paleoceanographic reconstruction in the subtropical Atlantic Ocean: the pink and white varieties of Globigerinoides ruber. Geochemical analyses were performed on foraminifera from modern core-top samples...
Community-level response of fishes and aquatic macroinvertebrates to stream restoration in a third-order tributary of the Potomac River, USA
S.M. Selego, C.L. Rose, G.T. Merovich Jr., Stuart A. Welsh, James T. Anderson
2012, International Journal of Ecology (2012)
Natural stream channel design principles and riparian restoration practices were applied during spring 2010 to an agriculturally impaired reach of the Cacapon River, a tributary of the Potomac River which flows into the Chesapeake Bay. Aquatic macroinvertebrates and fishes were sampled from the restoration reach, two degraded control, and two...
Selection indicates preference in diverse habitats: A Ground-Nesting bird (charadrius melodus) using reservoir shoreline
M.J. Anteau, M. H. Sherfy, M.T. Wiltermuth
2012, PLoS ONE (7)
Animals use proximate cues to select resources that maximize individual fitness. When animals have a diverse array of available habitats, those selected could give insights into true habitat preferences. Since the construction of the Garrison Dam on the Missouri River in North Dakota, Lake Sakakawea (SAK) has become an important...
Mapping carbon flux uncertainty and selecting optimal locations for future flux towers in the Great Plains
Yingxin Gu, Daniel M. Howard, Bruce K. Wylie, Li Zhang
2012, Landscape Ecology (27) 319-326
Flux tower networks (e. g., AmeriFlux, Agriflux) provide continuous observations of ecosystem exchanges of carbon (e. g., net ecosystem exchange), water vapor (e. g., evapotranspiration), and energy between terrestrial ecosystems and the atmosphere. The long-term time series of flux tower data are essential for studying and understanding terrestrial carbon cycles,...
Spatial patterns of soil nitrification and nitrate export from forested headwaters in the northeastern United States
D.S. Ross, J. B. Shanley, J.L. Campbell, G.B. Lawrence, S.W. Bailey, G.E. Likens, B.C. Wemple, G. Fredriksen, A.E. Jamison
2012, Journal of Geophysical Research G: Biogeosciences (117)
Nitrogen export from small forested watersheds is known to be affected by N deposition but with high regional variability. We studied 10 headwater catchments in the northeastern United States across a gradient of N deposition (5.4 - 9.4 kg ha -1 yr -1) to determine if soil nitrification...
Wildfire impacts on soil-water retention in the Colorado Front Range, United States
Brian A. Ebel
2012, Water Resources Research (48) 1-12
This work examined the plot-scale differences in soil-water retention caused by wildfire in the area of the 2010 Fourmile Canyon Fire in the Colorado Front Range, United States. We measured soil-water retention curves on intact cores and repacked samples, soil particle-size distributions, and organic matter content. Estimates were also made...
Habitat and prey availability attributes associated with juvenile and early adult pallid sturgeon occurrence in the Missouri River, USA
Bryan D. Spindler, Steven R. Chipps, Robert A. Klumb, Brian D. S. Graeb, Michael C. Wimberly
2012, Endangered Species Research (16) 225-234
The pallid sturgeon Scaphirhynchus albus is a federally endangered species native to the Missouri and lower Mississippi Rivers, USA. As part of recovery efforts, over 360000 pallid sturgeon have been stocked into the Missouri River since 1994, and a standardized, long-term monitoring program was initiated in 2003. Understanding the distribution...
Relationships between Δ14C and the molecular quality of dissolved organic carbon in rivers draining to the coast from the conterminous United States
David Butman, Peter A. Raymond, Kenna D. Butler, George R. Aiken
2012, Global Biogeochemical Cycles (26)
Dissolved organic carbon (DOC) in natural waters possesses chemical and molecular qualities indicative of its source and age. The apportionment of DOC by age into millennial and decadal pools is necessary to understand the temporal connection between terrestrial and aquatic ecosystems in the global carbon cycle. We measured Δ14C-DOC and...
Recent changes in successional state of the deep-water fish communities of Lakes Michigan, Huron, and Ontario and management implications
Randy L. Eshenroder, Brian F. Lantry
William W. Taylor, Abigail J. Lynch, Nancy J. Leonard, editor(s)
2012, Book chapter, Great Lakes fisheries policy and management: A binational perspective
No abstract available....
Prevalence, environmental loading, and molecular characterization of Cryptosporidium and Giardia
Stori C Oates, Melissa A. Miller, Dane Hardin, Patricia A. Conrad, Ann Melli, David A. Jessup, Clare Dominik, Annette Roug, M. Tim Tinker, Woutrina A. Miller
2012, Applied and Environmental Microbiology (78) 8762-8772
The risk of disease transmission from waterborne protozoa is often dependent on the origin (e.g., domestic animals versus wildlife), overall parasite load in contaminated waterways, and parasite genotype, with infections being linked to runoff or direct deposition of domestic animal and wildlife feces. Fecal samples collected from domestic animals and...
An application and extension of the constraints–effects–mitigation model to Minnesota waterfowl hunting
Susan A. Schroeder, David C. Fulton, Jeffrey S. Lawrence, Steven D. Cordts
2012, Human Dimensions of Wildlife (17) 174-192
This study extends modeling work on the leisure constraint negotiation process from physically active leisure and celebrity fandom to hunting. We test a model derived from the constraints–effects–mitigation model of leisure participation. The model is examined in the context of continued Minnesota waterfowl hunting among a sample of Minnesota residents...
Copper(II) binding by dissolved organic matter: Importance of the copper-to-dissolved organic matter ratio and implications for the Biotic Ligand Model
Alison M. Craven, George R. Aiken, Joseph N. Ryan
2012, Environmental Science & Technology (46) 9948-9955
The ratio of copper to dissolved organic matter (DOM) is known to affect the strength of copper binding by DOM, but previous methods to determine the Cu2+–DOM binding strength have generally not measured binding constants over the same Cu:DOM ratios. In this study, we used a competitive ligand exchange–solid-phase extraction...
Assessing freshwater habitat of adult anadromous alewives using multiple approaches
Martha E. Mather, Holly J. Frank, Joseph M. Smith, Roxann D. Cormier, Robert M. Muth, John T. Finn
2012, Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science (4) 188-200
After centuries of disturbance, environmental professionals now recognize the need to restore coastal watersheds for native fish and protect the larger ecosystems on which fish and other aquatic biota depend. Anadromous fish species are an important component of coastal ecosystems that are often adversely affected by human activities. Restoring native...
Comparison of electrical conductivity calculation methods for natural waters
R. Blaine McCleskey, D. Kirk Nordstrom, Joseph N. Ryan
2012, Limnology and Oceanography: Methods (10) 952-967
The capability of eleven methods to calculate the electrical conductivity of a wide range of natural waters from their chemical composition was investigated. A brief summary of each method is presented including equations to calculate the conductivities of individual ions, the ions incorporated, and the method's limitations. The ability of...
Using rocks to reveal the inner workings of magma chambers below volcanoes in Alaska’s National Parks
Michelle L. Coombs, Charles R. Bacon
2012, Alaska Park Science (11) 26-33
Alaska is one of the most vigorously volcanic regions on the planet, and Alaska’s national parks are home to many of the state’s most active volcanoes. These pose both local and more distant hazards in the form of lava and pyroclastic flows, lahars (mudflows), ash clouds, and ash fall. Alaska’s...
Tritium plume dynamics in the shallow unsaturated zone adjacent to an arid waste-disposal facility, Amargosa Desert Research Site, Nevada
S.R. Maples
2012, Thesis
No abstract available....
VS2DI: Model use, calibration, and validation
Richard W. Healy, Hedeff I. Essaid
2012, Transactions of the ASABE (55) 1249-1260
VS2DI is a software package for simulating water, solute, and heat transport through soils or other porous media under conditions of variable saturation. The package contains a graphical preprocessor for constructing simulations, a postprocessor for displaying simulation results, and numerical models that solve for flow and solute transport (VS2DT) and...
Correlation of early Paleogene global diversity patterns of large benthic foraminifera with Paleocene-Eocene hyperthermal events
Katherine J. Whidden, Robert J. Jones
2012, Palaios (27) 235-251
Large benthic foraminifera (LBF) were major contributors to many Paleogene carbonate platforms around the world. These photosymbiotic foraminifera lived in warm, oligotrophic, shallow waters within the photic zone. Such Paleogene families as the nummulitids, alveolinids, and orthophragminids rose to prominence in the late Paleocene, thrived in the early and middle...
Humic acid facilitates the transport of ARS-labeled hydroxyapatite nanoparticles in iron oxyhydroxide-coated sand
Dengjun Wang, Scott A. Bradford, Ronald W. Harvey, Bin Gao, Long Cang, Dongmei Zhou
2012, Environmental Science & Technology (46) 2738-2745
Hydroxyapatite nanoparticles (nHAP) have been widely used to remediate soil and wastewater contaminated with metals and radionuclides. However, our understanding of nHAP transport and fate is limited in natural environments that exhibit significant variability in solid and solution chemistry. The transport and retention kinetics of Alizarin red S (ARS)-labeled nHAP...
