Potential strategies for recovery of lake whitefish and lake herring stocks in eastern Lake Erie
K. Oldenburg, M.A. Stapanian, P.A. Ryan, E. Holm
2007, Journal of Great Lakes Research (33) 46-58
Lake Erie sustained large populations of ciscoes (Salmonidae: Coregoninae) 120 years ago. By the end of the 19th century, abundance of lake whitefish (Coregonus clupeaformis) had declined drastically. By 1925, the lake herring (a cisco) population (Coregonus artedii) had collapsed, although a limited lake herring fishery persisted in the eastern basin until...
Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA
P.C. Palmer, M. W. Gannett, S.R. Hinkle
2007, Journal of Hydrology (336) 17-29
Stable isotope (??D and ??18O) signatures of three principal groundwater recharge areas in the 21,000-km2 upper Klamath Basin are used to infer recharge sources for aquifers in the interior parts of the basin. Two of the principal recharge areas, the Cascade Range on the western and southern margin of the...
Waterfowl distribution and abundance during spring migration in Southern Oregon and Northeastern California
Joseph P. Fleskes, J.L. Yee
2007, Western North American Naturalist (67) 409-428
We used aerial surveys to study abundance and distribution of waterfowl (ducks, geese, swans, and coots) during spring in southern Oregon and northeastern California (SONEC). Total waterfowl-use days in SONEC during the 119-day, 5 January-3 May, spring period was similar during 2002 (127,977,700) and 2003 (128,076,200) and averaged 1,075,900 birds...
A new comprehensive approach to characterizing carbonaceous aerosol with an application to wintertime Fresno, California PM2.5
P. Herckes, Jerry A. Leenheer, J.L. Collett Jr.
2007, Atmospheric Chemistry and Physics Discussions (7) 8423-8453
Fine particulate matter (PM2.5) samples were collected during a three week winter period in Fresno (CA). A composite sample was characterized by isolating several distinct fractions and characterizing them by infrared and nuclear magnetic resonance (NMR) spectroscopy. More than 80% of the organic matter in the aerosol samples was recovered...
Detection of viral hemorrhagic septicemia in round gobies in New York State (USA) waters of Lake Ontario and the St. Lawrence River
Geoffrey H. Groocock, Rodman G. Getchell, G.A. Wooster, K.L. Britt, William N. Batts, James 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...
Quantifying foodweb interactions with simultaneous linear equations: Stable isotope models of the Truckee River, USA
L. Saito, C. Redd, S. Chandra, L. Atwell, C.H. Fritsen, Michael R. Rosen
2007, Journal of the North American Benthological Society (26) 642-662
Aquatic foodweb models for 2 seasons (relatively high- [March] and low-flow [August] conditions) were constructed for 4 reaches on the Truckee River using ??13C and ??15N data from periphyton, macroinvertebrate, and fish samples collected in 2003 and 2004. The models were constructed with isotope values that included measured periphyton signatures...
Monitoring and source tracking of tetracycline resistance genes in lagoons and groundwater adjacent to swine production facilities over a 3-year period
S. Koike, I.G. Krapac, H.D. Oliver, A.C. Yannarell, J. C. Chee-Sanford, R.I. Aminov, R.I. Mackie
2007, Applied and Environmental Microbiology (73) 4813-4823
To monitor the dissemination of resistance genes into the environment, we determined the occurrence of tetracycline resistance (Tcr) genes in groundwater underlying two swine confinement operations. Monitoring well networks (16 wells at site A and 6 wells at site C) were established around the lagoons at each facility. Groundwater (n...
Comparative velocity structure of active Hawaiian volcanoes from 3-D onshore-offshore seismic tomography
J. W. Park, J.K. Morgan, C.A. Zelt, Paul G. Okubo, L. E. Peters, N. Benesh
2007, Earth and Planetary Science Letters (259) 500-516
We present a 3-D P-wave velocity model of the combined subaerial and submarine portions of the southeastern part of the Island of Hawaii, based on first-arrival seismic tomography of marine airgun shots recorded by the onland seismic network. Our model shows that high-velocity materials (6.5-7.0??km/s) lie beneath Kilauea's summit, Koae...
Seasonal variations in modern speleothem calcite growth in Central Texas, U.S.A
J.L. Banner, Amber L. Guilfoyle, E.W. James, L.A. Stern, M. Musgrove
2007, Journal of Sedimentary Research (77) 615-622
Variations in growth rates of speleothem calcite have been hypothesized to reflect changes in a range of paleoenvironmental variables, including atmospheric temperature and precipitation, drip-water composition, and the rate of soil CO2 delivery to the subsurface. To test these hypotheses, we quantified growth rates of modern speleothem calcite on artificial...
Efficiency of conventional drinking-water-treatment processes in removal of pharmaceuticals and other organic compounds
Paul E. Stackelberg, Jacob Gibs, Edward Furlong, Michael Frederick Meyer, Steven D. Zaugg, R.L. Lippincott
2007, Science of the Total Environment (377) 255-272
Samples of water and sediment from a conventional drinking-water-treatment (DWT) plant were analyzed for 113 organic compounds (OCs) that included pharmaceuticals, detergent degradates, flame retardants and plasticizers, polycyclic aromatic hydrocarbons (PAHs), fragrances and flavorants, pesticides and an insect repellent, and plant and animal steroids. 45 of these compounds were detected...
Young cumulate complex beneath Veniaminof caldera, Aleutian arc, dated by zircon in erupted plutonic blocks
Charles R. Bacon, T.W. Sison, F.K. Mazdab
2007, Geology (35) 491-494
Mount Veniaminof volcano, Alaska Peninsula, provides an opportunity to relate Quaternary volcanic rocks to a coeval intrusive complex. Veniaminof erupted tholeiitic basalt through dacite in the past ∼260 k.y. Gabbro, diorite, and miarolitic granodiorite blocks, ejected 3700 14C yr B.P. in the most recent...
Errors in acoustic doppler profiler velocity measurements caused by flow disturbance
D. S. Mueller, J.D. Abad, C.M. Garcia, J. W. Gartner, M.H. Garcia, K. A. Oberg
2007, Journal of Hydraulic Engineering (133) 1411-1420
Acoustic Doppler current profilers (ADCPs) are commonly used to measure streamflow and water velocities in rivers and streams. This paper presents laboratory, field, and numerical model evidence of errors in ADCP measurements caused by flow disturbance. A state-of-the-art three-dimensional computational fluid dynamic model is validated with and used to complement...
A classification of U.S. estuaries based on physical and hydrologic attributes
V.D. Engle, J.C. Kurtz, L.M. Smith, C. Chancy, P. E. Bourgeois
2007, Environmental Monitoring and Assessment (129) 397-412
A classification of U.S. estuaries is presented based on estuarine characteristics that have been identified as important for quantifying stressor-response relationships in coastal systems. Estuaries within a class have similar physical and hydrologic characteristics and would be expected to demonstrate similar biological responses to stressor loads from the adjacent watersheds....
Monitoring engineered remediation with borehole radar
John W. Lane, Frederick D. Day-Lewis, Peter K. Joesten
2007, The Leading Edge (26) 1032-1035
The success of engineered remediation is predicated on correct emplacement of either amendments (e.g., vegetable-oil emulsion, lactate, molasses, etc.) or permeable reactive barriers (e.g., vegetable oil, zero-valent iron, etc.) to enhance microbial or geochemical breakdown of contaminants and treat contaminants. Currently, site managers have limited tools to provide information about...
Clean coal initiatives in Indiana
B.H. Bowen, M.W. Irwin, F.T. Sparrow, Maria D. Mastalerz, Z. Yu, R.A. Kramer
2007, International Journal of Energy Sector Management (1) 96-108
Purpose - Indiana is listed among the top ten coal states in the USA and annually mines about 35 million short tons (million tons) of coal from the vast reserves of the US Midwest Illinois Coal Basin. The implementation and commercialization of clean coal technologies is important to the economy...
Landscape heterogeneity shapes predation in a newly restored predator-prey system
M. J. Kauffman, N. Varley, D.W. Smith, D.R. Stahler, D.R. MacNulty, M.S. Boyce
2007, Ecology Letters (10) 690-700
Because some native ungulates have lived without top predators for generations, it has been uncertain whether runaway predation would occur when predators are newly restored to these systems. We show that landscape features and vegetation, which influence predator detection and capture of prey, shape large-scale patterns of predation in a...
Regional magnetic anomalies, crustal strength, and the location of the northern Cordilleran fold-and-thrust belt
R.W. Saltus, T.L. Hudson
2007, Geology (35) 567-570
The northern Cordilleran fold-and-thrust belt in Canada and Alaska is at the boundary between the broad continental margin mobile belt and the stable North American craton. The fold-and-thrust belt is marked by several significant changes in geometry: cratonward extensions in the central Yukon Territory and northeastern Alaska are separated by...
Diel periodicity of drift of larval fishes in tributaries of Lake Ontario
J. Micheal Johnson, J.E. McKenna Jr.
2007, Journal of Freshwater Ecology (22) 347-350
Diel patterns of downstream drift were examined during mid-June in three tributaries of Lake Ontario. Larval fishes were collected in drift nets that were set in each stream for 72 consecutive hours and emptied at 4-h intervals. Fantail darter (Ethostoma flabellare) and blacknose dace (Rhinichthys atractulus) were the two most...
Stream ecosystem response to limestone treatment in acid impacted watersheds of the allegheny plateau
S.E. McClurg, J.T. Petty, P. M. Mazik, J.L. Clayton
2007, Ecological Applications (17) 1087-1104
Restoration programs are expanding worldwide, but assessments of restoration effectiveness are rare. The objectives of our study were to assess current acid-precipitation remediation programs in streams of the Allegheny Plateau ecoregion of West Virginia (USA), identify specific attributes that could and could not be fully restored, and quantify temporal trends...
Daily foraging patterns of adult Double-crested Cormorants during the breeding season
J.T.H. Coleman, M. E. Richmond
2007, Waterbirds (30) 189-198
We recorded the daily presence of Double-crested Cormorants (Phalacrocorax auritus) at the nesting island on Oneida Lake, New York, by monitoring the activities of 15 radio-tagged adults from July through September, 2000, using an automated data-logging receiver. A total of 24,464 acceptable detections was obtained for adult cormorants actively attempting...
Statistical analysis of water-quality data containing multiple detection limits II: S-language software for nonparametric distribution modeling and hypothesis testing
L. Lee, D. Helsel
2007, Computers & Geosciences (33) 696-704
Analysis of low concentrations of trace contaminants in environmental media often results in left-censored data that are below some limit of analytical precision. Interpretation of values becomes complicated when there are multiple detection limits in the data-perhaps as a result of changing analytical precision over time. Parametric and semi-parametric methods,...
Monitoring mangrove forest dynamics of the Sundarbans in Bangladesh and India using multi-temporal satellite data from 1973 to 2000
S. Giri, Bruce Pengra, Z. Zhu, A. K. Singh, L.L. Tieszen
2007, Estuarine, Coastal and Shelf Science (73) 91-100
Mangrove forests in many parts of the world are declining at an alarming rate—possibly even more rapidly than inland tropical forests. The rate and causes of such changes are not known. The forests themselves are dynamic in nature and are undergoing constant changes due to both natural and anthropogenic forces....
Comparative toxicity of chlorpyrifos, diazinon, malathion and their oxon derivatives to larval Rana boylii
D. W. Sparling, G. M. Fellers
2007, Environmental Pollution (147) 535-539
Organophosphorus pesticides (OPs) are ubiquitous in the environment and are highly toxic to amphibians. They deactivate cholinesterase, resulting in neurological dysfunction. Most chemicals in this group require oxidative desulfuration to achieve their greatest cholinesterase-inhibiting potencies. Oxon derivatives are formed within liver cells but also by bacterial decay of parental pesticides....
Estimating the bankfull velocity and discharge for rivers using remotely sensed river morphology information
David M. Bjerklie
2007, Journal of Hydrology (341) 144-155
A method to estimate the bankfull velocity and discharge in rivers that uses the morphological variables of the river channel, including bankfull width, channel slope, and meander length was developed and tested. Because these variables can be measured remotely from topographic and river alignment information derived from aerial photos and...
Frequency of sublethal injury in a deepwater ophiuroid, Ophiacantha bidentata, an important component of western Atlantic Lophelia reef communities
Brooks R. Allen, Martha S. Nizinski, Steve W. Ross, Kenneth J. Sulak
2007, Marine Biology (152) 307-314
The occurrence and relative abundance of tissue (arm) regeneration in the ophiuroid, Ophiacantha bidentata (Retzius), was examined in individuals collected primarily among colonies of the deep-water coral Lophelia pertusa off the southeastern United States. Seven deep-water coral sites (384-756 m), located between Cape Lookout, NC, and Cape Canaveral, FL, were...
