Guidance for evaluating and recommending temperature regimes to protect fish
Carl L. Armour
1991, Report, Instream Flow Information Paper 28
Procedures are presented for evaluating temperature regimes for fish. Although examples pertain to spring chinook salmon (Oncorhynchus tshawytscha), the principles apply to other species. Basic temperature tolerance relationships for fish are explained and three options are described for comparing alternative temperature regimes. The options are to base...
Assessing the direct effects of streamflow on recreation: a literature review
Thomas C. Brown, Jonathan G. Taylor, Bo Shelby
1991, Journal of the American Water Resources Association (27) 979-989
A variety of methods have been used to learn about the relation between streamflow and recreation quality. Regardless of method, nearly all studies found a similar nonlinear relation of recreation to flow, with quality increasing with flow to a point, and then decreasing for further increases in flow. Points of...
Comment and Reply on "Origin of deep crustal reflections: Implications of coincident seismic refraction and reflection data in Nevada"
R.D. Hyndman, T. J. Lewis, G. Marquis, W. Steven Holbrook, Rufus D. Catchings, Craig M. Jarchow
1991, Geology (19) 1234-1244
No abstract available....
Assessment of smolt condition for travel time analysis. Annual report 1990
J.W. Beeman, D.W. Rondorf, J.C. Faler, P.V. Haner, S.T. Sauter, D.A. Venditti
1991, Report
No abstract available...
Pulses of middle Eocene to earliest Oligocene climatic deterioration in Southern California and the Gulf Coast
Norman O. Frederiksen
1991, Palaios (6) 564-571
No abstract available. ...
Standing crops and ecology of aquatic invertebrates in agricultural drainwater ponds in California
N.H. Euliss Jr., R. L. Jarvis, D.S. Gilmer
1991, Wetlands (11) 179-190
We examined standing crops and ecology of aquatic invertebrates in agricultural drainwater evaporation ponds in California from October 1982 to March 1983 and September 1983 to March 1984. Evaporation ponds supported low diversities but high standing crops of aquatic invertebrates. A water boatman (Trichocorixa reticulata) and a midge (Tanypus grodhausi)...
Rapid dewatering of the crust deduced from ages of mesothermal gold deposits
R.J. Goldfarb, L.W. Snee, L.D. Miller, R.J. Newberry
1991, Nature (354) 296-298
The large-scale migration of fluids through the continental crust has been well documented, but there is no consensus regarding the timing of fluid migration relative to orogenic episodes, or rates of crustal dewatering1. Here we present40Ar/39Ar dates for muscovites from quartz veins along a major shear zone in southeast Alaska,...
Late Devonian history of Michigan basin
R.C. Gutschick, Charles Sandberg
1991, Special Paper of the Geological Society of America (256) 181-202
The Upper Devonian sequence in the Michigan Basin is a westward extension of coeval cyclical facies of the Catskill deltaic complex in the Appalachian basin. Both basins and the intervening Findlay arch express the tectonic and sedimentational effects of foreland compression and isostatic compensation produced by the Acadian orogeny. The...
Continental crustal evolution observations
Walter D. Mooney, R. Meissner
1991, Eos, Earth and Space Science News (72) 537-541
How has the continental crust evolved? What are the primary processes responsible for its composition, structure, and mode of deformation? What role do fluids play in deep crustal processes? In the last dozen years, geophysicists have obtained images of the deep continental crust that can be used...
Upper Devonian biostratigraphy of Michigan Basin
R.C. Gutschick, Charles Sandberg
1991, GSA Special Papers (256) 179
The Late Devonian Michigan Basin was floored by the Middle and Upper Devonian Squaw Bay Limestone, which was deposited during the downwarping that produced the basin within a former Middle Devonian carbonate platform. The Squaw Bay comprises three beds, each having a different conodont fauna. The two upper beds, deposited...
Comment and reply on "Delle Phosphatic Member: An anomalous phosphatic interval in the Mississippian (Osagean-Meramecian) shelf sequence of central Utah"
Charles Sandberg, R.C. Gutschick, Morris S. Petersen, Forrest G. Poole, Willi Ziegler
1991, Geology (19) 410-412
No abstract available....
Strain accumulation along the Denali Fault at the Nenana River and Delta River Crossings, Alaska
James C. Savage, Michael Lisowski
1991, Journal of Geophysical Research B: Solid Earth (96) 14481-14892
Surveys of trilateration networks across the Denali fault at the Nenana River in 1982, 1984, and 1988 and at the Delta River in 1975, 1979, 1982, and 1984 indicate a minor (0.10±0.04 μstrain/yr) northeastward uniaxial extension. The component of right‐lateral shear‐strain accumulation across the fault is not significant at the...
Seismic imaging of extended crust with emphasis on the western United States: Discussion and reply
Christopher J. Potter, Jill McCarthy, George A. Thompson
1991, Geological Society of America Bulletin (103) 1537-1542
No abstract available....
Sampling methods for amphibians in streams in the Pacific Northwest
R. Bruce Bury, Paul Stephen Corn
1991, Report
Methods describing how to sample aquatic and semiaquatic amphibians in small streams and headwater habitats in the Pacific Northwest are presented. We developed a technique that samples 10-meter stretches of selected streams, which was adequate to detect presence or absence of amphibian species and provided sample sizes statistically sufficient...
Ground water impacts from irrigated ridge tillage
H. W. Anderson Jr., R.H. Dowdy, G. N. Delin
1991, Conference Paper, Irrigation and Drainage---1991 National Conference, Honolulu, Hawaii, July 22-26, 1991, Proceedings
No abstract available....
Nutrient limitation of clutch size in waterfowl: Is there a universal hypothesis?
R.D. Drobney
1991, Condor (93) 1026-1028
Lead toxicosis in tundra swans near a mining and smelting complex in northern Idaho
Lawrence J. Blus, Charles J. Henny, David J. Hoffman, Robert A. Grove
1991, Archives of Environmental Contamination and Toxicology (21) 549-555
Die-offs of waterfowl have occurred in the Coeur d'Alene River system in northern Idaho since at least the early 1900's. We investigated causes of mortality and lead and cadmium contamination of 46 tundra swans (Cygnus columbianus) from 1987 to 1989; an additional 22 swans found dead in 1990 were not...
Role of exposure mode in the bioavailability of triphenyl phosphate to aquatic organisms
James N. Huckins, James F. Fairchild, Terence P. Boyle
1991, Archives of Environmental Contamination and Toxicology (21) 481-485
A laboratory study was conducted to investigate the role of the route of triphenyl phosphate (TPP) entry on its aquatic bioavailability and acute biological effects. Three TPP treatments were used for exposures of fish and invertebrates. These consisted of TPP dosed directly into water with and without clean sediment and...
A modeling assessment of the thermal regime for an urban sport fishery
John M. Bartholow
1991, Environmental Management (15) 833-845
Water temperature is almost certainly a limiting factor in the maintenance of a self-sustaining rainbow trout (Oncorhynchus mykiss, formerly Salmo gairdneri) and brown trout (Salmo trutta) fishery in the lower reaches of the Cache la Poudre River near Fort Collins, Colorado, USA. Irrigation diversions dewater portions of the river, but...
Geographic and temporal variation in the diet of Yellow-headed Blackbirds
Daniel J. Twedt, William J. Bleier, George M. Linz
1991, The Condor (93) 975-986
Yellow-headed Blackbirds (Xanthocephalus xanthocephalus) are presumed predators of sunflower (Helianthus annuus) in the northern Great Plains. Their esophageal contents varied temporally and among three provinces and three states in relation to regional agricultural bases but males contained more sunflower and small grains than females whereas females contained more weed seeds...
Geographic distribution of Molossops neglectus Williams and Genoways (Chiroptera: Molossidae)
Cesar F. Ascorra, Don E. Wilson, Charles O. Handley Jr.
1991, Journal of Mammalogy (72) 828-830
No abstract available....
Calcareous nannofossils and forarninifers from Paleocene and Eocene strata in Maryland and Virginia
L.M. Bybell, T. G. Gibson
1991, Book chapter, Paleocene-Eocene boundary sedimentation in the Potomac River valley, Virginia and Maryland
No abstract available ...
Potomac River Paleocene and Eocene
L.M. Bybell
1991, Book chapter, Paleocene Eocene boundary sedimentation in the Potomac River valley, Virginia and Maryland
No abstract available ...
U and Sr Isotopes in ground water and calcite, Yucca Mountain, Nevada: Evidence against upwelling water
J. S. Stuckless, Z. E. Peterman, D.R. Muhs
1991, Science (254) 551-554
Hydrogenic calcite and opaline silica deposits in fault zones at Yucca Mountain, Nevada, have created considerable public and scientific controversy because of the possible development of a high-level nuclear waste repository at this location. Strontium and uranium isotopic compositions of hydrogenic materials were used to test whether the veins could...
Rapid formation of Ontong Java Plateau by Aptian mantle plume volcanism
J.A. Tarduno, W.V. Sliter, L. Kroenke, M. Leckie, H. Mayer, J.J. Mahoney, R. Musgrave, M. Storey, E.L. Winterer
1991, Science (254) 399-403
The timing of flood basalt volcanism associated with formation of the Ontong Java Plateau (OJP) is estimated from paleomagnetic and paleontologic data. Much of OJP formed rapidly in less than 3 million years during the early Aptian, at the beginning of the Cretaceous Normal Polarity Superchron. Crustal emplacement rates are...
