Assessing the risk of Loveland Dam operations to the arroyo toad (Bufo californicus) in the Sweetwater River Channel, San Diego County, California
M. C. Madden-Smith, A.J. Atkinson, Robert N. Fisher, W.R. Danskin, Gregory O. Mendez
2004, Report
No abstract available....
New method for quantification of vuggy porosity from digital optical borehole images as applied to the karstic Pleistocene limestone of the Biscayne aquifer, southeastern Florida
K.J. Cunningham, J.I. Carlson, N.F. Hurley
2004, Journal of Applied Geophysics (55) 77-90
Vuggy porosity is gas- or fluid-filled openings in rock matrix that are large enough to be seen with the unaided eye. Well-connected vugs can form major conduits for flow of ground water, especially in carbonate rocks. This paper presents a new method for quantification of vuggy porosity calculated from digital...
Upper Cretaceous sequences and sea-level history, New Jersey Coastal Plain
K.G. Miller, P. J. Sugarman, J.V. Browning, M.A. Kominz, R.K. Olsson, M.D. Feigenson, J.C. Hernandez
2004, Geological Society of America Bulletin (116) 368-393
We developed a Late Cretaceous sealevel estimate from Upper Cretaceous sequences at Bass River and Ancora, New Jersey (ODP [Ocean Drilling Program] Leg 174AX). We dated 11-14 sequences by integrating Sr isotope and biostratigraphy (age resolution ??0.5 m.y.) and then estimated paleoenvironmental changes within the sequences from lithofacies and biofacies...
Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike-slip faults
J. Lin, R.S. Stein
2004, Journal of Geophysical Research B: Solid Earth (109)
We argue that key features of thrust earthquake triggering, inhibition, and clustering can be explained by Coulomb stress changes, which we illustrate by a suite of representative models and by detailed examples. Whereas slip on surface-cutting thrust faults drops the stress in most of the adjacent crust, slip on blind...
Dietary uptake of polychlorinated biphenyls (PCBs) by rainbow trout
Robert F. Carline, Patrick M. Barry, H. George Ketola
2004, North American Journal of Aquaculture (66) 91-99
The presence of detectable levels of polychlorinated biphenyls (PCBs) in commercially produced fish feed has raised a concern about the degree of biomagnification of these contaminants in hatchery-reared trout. Our objectives were to (1) define the relationship between concentrations of PCBs in fish feed and in fish tissue and (2)...
Organochlorine compounds in Lake Superior: Chiral polychlorinated biphenyls and biotransformation in the aquatic food web
Charles S. Wong, Scott A. Mabury, D. Michael Whittle, Sean M. Backus, Camilla Teixeira, David S. DeVault, Charles R. Bronte, Derek C.G. Muir
2004, Environmental Science & Technology (38) 84-92
The enantiomeric composition of seven chiral PCB congeners was measured in the Lake Superior aquatic food web sampled in 1998, to determine the extent of enantioselective biotransformation in aquatic biota. All chiral PCB congeners studied (CBs 91, 95, 136, 149, 174, 176, and 183) biomagnified in the Lake Superior aquatic...
Invertebrate egg banks of restored, natural, and drained wetlands in the Prairie Pothole Region of the United States
R.A. Gleason, N.H. Euliss Jr., D.E. Hubbard, W.G. Duffy
2004, Wetlands (24) 562-572
Analogous to ‘seed banks,’ ‘egg banks’ are important for seasonal succession and maintenance of invertebrate species diversity throughout wet and dry cycles in the prairie pothole region. Further, recruitment of invertebrates from relic egg banks in the sediments and dispersal of eggs into wetlands is believed to be important for...
A Holocene history of dune-mediated landscape change along the southeastern shore of Lake Superior
Walter L. Loope, Timothy G. Fisher, Harry M. Jol, John B. Anderton, William L. Blewett
2004, Geomorphology (61) 303-322
Causal links that connect Holocene high stands of Lake Superior with dune building, stream damming and diversion and reservoir impoundment and infilling are inferred from a multidisciplinary investigation of a small watershed along the SE shore of Lake Superior. Radiocarbon ages of wood fragments from in-place stumps and soil O...
Habitat selection by two species of burrowing mayfly nymphs in the Les Cheneaux Islands region of northern Lake Huron
Marc A. Blouin, Patrick Hudson, Margret Chriscinske
2004, Journal of Freshwater Ecology (19) 507-514
This study focused primarily on the habitat preferences of Hexagenia limbata andEphemera simulans, two species prevalent in northern Lake Huron, to gain a better understanding of the key components that determined their distribution and abundance. Both species preferred habitats based upon depth and sediment type. In addition, the burrowing activity of H. limbata was...
Microbial precipitation of dolomite in methanogenic groundwater
Jennifer A. Roberts, Philip C. Bennett, Luis A. Gonzalez, G.L. Macpherson, Kitty L. Milliken
2004, Geology (32) 277-280
We report low-temperature microbial precipitation of dolomite in dilute natural waters from both field and laboratory experiments. In a freshwater aquifer, microorganisms colonize basalt and nucleate nonstoichiometric dolomite on cell walls. In the laboratory, ordered dolomite formed at near-equilibrium conditions from groundwater with molar Mg:Ca ratios of <1; dolomite was...
Status of the shortjaw cisco (Coregonus zenithicus) in Lake Superior
Michael H. Hoff, Thomas N. Todd
2004, Annales Zoologici Fennici (41) 147-154
The shortjaw cisco (Coregonus zenithicus) was historically found in Lakes Huron, Michigan, and Superior, but has been extirpated in Lakes Huron and Michigan apparently as the result of commercial overharvest. During 1999-2001, we conducted an assessment of shortjaw cisco abundance in five areas, spanning the U.S. waters of Lake Superior,...
Time-dependent lethal body residues for the toxicity of pentachlorobenzene to Hyalella azteca
Peter F. Landrum, Jeffery A. Steevens, Duane C. Gossiaux, Michael McElroy, Sander Robinson, Linda Begnoche, Sergei Chernyak, James Hickey
2004, Environmental Toxicology and Chemistry (23) 1335-1343
The study examined the temporal response of Hyalella azteca to pentachlorobenzene (PCBZ) in water-only exposures. Toxicity was evaluated by calculating the body residue of PCBZ associated with survival. The concentration of PCBZ in the tissues of H. azteca associated with 50% mortality decreased from 3 to 0.5 μmol/g over the temporal range of 1...
Wilderness experience in Rocky Mountain National Park 2002: Report to RMNP
Elke Schuster, S. Shea Johnson, Jonathan G. Taylor
2004, Open-File Report 2003-445
Approximately 250,000 acres of backcountry in Rocky Mountain National Park (RMNP or the Park) may be designated as wilderness use areas in the coming years. Currently, over 3 million people visit RMNP each year; many drive through the park on Trail Ridge Road, camp in designated campgrounds, or hike in...
Genetic variability among lake whitefish from Isle Royale and the Upper Great Lakes
Wendylee Stott, Thomas N. Todd, Larry Kallemeyn
2004, Annales Zoologici Fennici (41) 51-59
The coregonine fishes from Isle Royale National Park represent a unique group that has escaped the successional changes observed elsewhere in North America. Analysis of microsatellite DNA loci revealed significant genetic differences among samples of lake whitefish (Coregonus clupeaformis) from Isle Royale, Lake Superior, and Lake Huron. The amount of...
Rapid assessment indicator of wetland integrity as an unintended predictor of avian diversity
Martin A. Stapanian, Thomas A. Waite, Gregory Krzys, John J. Mack, Mick Micacchion
2004, Hydrobiologia (520) 119-126
Rapid assessment of aquatic ecosystems has been widely implemented, sometimes without thorough evaluation of the robustness of rapid assessment metrics as indicators of ecological integrity. Here, we evaluate whether the Ohio Rapid Assessment Method (ORAM) for Wetlands Version 5.0 is a useful indicator of ecological integrity beyond its intended purpose....
Implications of hydrologic variability on the succession of plants in Great Lakes wetlands
Douglas A. Wilcox
2004, Aquatic Ecosystem Health & Management (7) 223-231
Primary succession of plant communities directed toward a climax is not a typical occurrence in wetlands because these ecological systems are inherently dependent on hydrology, and temporal hydrologic variability often causes reversals or setbacks in succession. Wetlands of the Great Lakes provide good examples for demonstrating the implications of hydrology...
Occurrence of Ergasilus megaceros Wilson, 1916, in the sea lamprey and other fishes from North America
Patrick M. Muzzall, Patrick L. Hudson
2004, Journal of Parasitology (90) 184-185
Ergasilus megaceros (Copepoda: Ergasilidae) was recovered from the nasal fossae (lamellae) of the olfactory sac in 1 (1.8%) of 56 sea lampreys, Petromyzon marinus Linne, 1758, collected in May 2002 from the Cheboygan River, Michigan. Although the sea lamprey is a new host record for E. megaceros, this fish species may not be a...
Overwinter survival of juvenile lake herring in relation to body size, physiological condition, energy stores, and food ration
Kevin L. Pangle, Trent M. Sutton, Ronald E. Kinnunen, Michael H. Hoff
2004, Transactions of the American Fisheries Society (133) 1235-1246
Populations of lake herring Coregonus artedi in Lake Superior have exhibited high recruitment variability over the past three decades. To improve our understanding of the mechanisms which influence year-class strength, we conducted a 225-d laboratory experiment to evaluate the effects of body size, physiological condition, energy stores, and food ration on the...
Evaluation of a chinook salmon (Oncorhynchus tshawytscha) bioenergetics model
Charles P. Madenjian, Daniel V. O’Connor, Sergei M. Chernyak, Richard R. Rediske, James P. O'Keefe
2004, Canadian Journal of Fisheries and Aquatic Sciences (61) 627-635
We evaluated the Wisconsin bioenergetics model for chinook salmon (Oncorhynchus tshawytscha) in both the laboratory and the field. Chinook salmon in laboratory tanks were fed alewife (Alosa pseudoharengus), the predominant food of chinook salmon in Lake Michigan. Food consumption and growth by chinook salmon during the experiment were measured. To...
Modeling the suppression of sea lamprey populations by the release of sterile males or sterile females
Waldemar Klassen, Jean V. Adams, Michael B. Twohey
2004, Journal of Great Lakes Research (30) 463-473
The suppressive effects of trapping adult sea lampreys, Petromyzon marinus Linnaeus, and releasing sterile males (SMRT) or females (SFRT) into a closed system were expressed in deterministic models. Suppression was modeled as a function of the proportion of the population removed by trapping, the number of sterile animals released, the...
Effect of stock size, climate, predation, and trophic status on recruitment of alewives in Lake Ontario, 1978-2000
Robert O’Gorman, Brian F. Lantry, Clifford P. Schneider
2004, Transactions of the American Fisheries Society (133) 855-867
The population of alewives Alosa pseudoharengus in Lake Ontario is of great concern to fishery managers because alewives are the principal prey of introduced salmonines and because alewives negatively influence many endemic fishes. We used spring bottom trawl catches of alewives to investigate the roles of stock size, climate, predation, and lake...
The status of Limnocalanus macrurus (Copepoda: Calanoida: Centropagidae) in Lake Erie
Douglas D. Kane, John E. Gannon, David A. Culver
2004, Journal of Great Lakes Research (30) 22-30
The calanoid copepod Limnocalanus macrurus showed large declines in abundance and a narrowing of spatial distribution with the onset of cultural eutrophication and increases in rainbow smelt (Osmerus mordax) abundances in Lake Erie in the mid 20th century. Since 1995, however, Limnocalanus macrurus appears to have repopulated in western Lake Erie to levels of...
Trophic transfer efficiency of DDT to lake trout (Salvelinus namaycush) from their prey
C.P. Madenjian, D.V. O’Connor
2004, Bulletin of Environmental Contamination and Toxicology (72) 1219-1225
The objective of our study was to determine the efficiency with which lake trout retain DDT from their natural food. Our estimate of DDT assimilation efficiency would represent the most realistic estimate, to date, for use in risk assessment models....
Contamination of groundwater under cultivated fields in an arid environment, central Arava Valley, Israel
O. Oren, Y. Yechieli, J.K. Böhlke, A. Dody
2004, Journal of Hydrology (290) 312-328
The purpose of this study is to obtain a better understanding of groundwater contamination processes in an arid environment (precipitation of 50 mm/year) due to cultivation. Additional aims were to study the fate of N, K, and other ions along the whole hydrological system including the soil and vadose...
Colonization, population growth, and nesting success of Black Oystercatchers following a seismic uplift
V.A. Gill, Scott A. Hatch, Richard B. Lanctot
2004, Condor (106) 791-800
We present data on the colonization of Middleton Island, Alaska, by Black Oystercatchers (Haematopus bachmani) following the creation of an extensive rocky intertidal zone after the Alaskan earthquake of 1964. The first pair of oystercatchers was detected in 1976, and it was another 5 years before the population increased to...
