Cobalt in ferromanganese crusts as a monitor of hydrothermal discharge on the Pacific sea floor
F.T. Manheim, C.M. Lane-Bostwick
1988, Nature (335) 59-62
Ferromanganese oxide crusts, which accumulate on unsedimented surfaces in the open ocean1–6, derive most of their metal content from dissolved and particulate matter in ambient bottom water7,8, in proportions modified by the variable scavenging efficiency of the oxide phase for susceptible ions9. They differ in this respect from abyssal nodules,...
The design and use of a hydraulic potentiomanometer for direct measurement of differences in hydraulic head between groundwater and surface water
Thomas C. Winter, James W. LaBaugh, Donald O. Rosenberry
1988, Limnology and Oceanography (33) 1209-1214
The hydraulic potentiomanometer described herein consists of a potentiometer connected to a manometer by a flexible tube. The device is used to directly measure the direction of seepage as well as the hydraulic-head difference between groundwater and surface water. The device works most effectively in sandy materials. For accurate measurements...
Effects of spatial orientation of multiple plate artificial substrates on invertebrate colonization
K. V. Slack, R. F. Ferreira, R.C. Averert, S.S. Kennelly
1988, Journal of the American Water Resources Association (24) 781-789
Jumbo multiple plate samplers were suspended in a river at 0.3 and 1 m depth in one of three orientations: interplate spaces closed to downwelling light and open to flow, open to light and flow, or open to light and closed to flow. Mean numbers of colonizing taxa and individuals...
Assessment of sampling stability in ecological applications of discriminant analysis
Byron K. Williams, Kimberly Titus
1988, Ecology (69) 1275-1285
A simulation study was undertaken to assess the sampling stability of the variable loadings in linear discriminant function analysis. A factorial design was used for the factors of multivariate dimensionality, dispersion structure, configuration of group means, and sample size. A total of 32 400 discriminant analyses were conducted, based on...
A broad-band, wide-dynamic range, strong-motion array near Parkheld, California, USA for measurement of acceleration and volumetric strain
Roger D. Borcherdt, Malcolm J. S. Johnston, Thomas Noce, Gary Glassmoyer, Douglas Myren
1988, Conference Paper, Proceedings of the ninth World Conference on Earthquake Engineering Tokyo-Kyoto, Japan, 1988
No abstract available....
User's guide to the wetland creation/restoration data base
J. Muhlenbruck, K.M. Manci, K. Schneller-McDonald
1988, Report
No abstract available....
Agonistic asymmetries and the foraging ecology of Bald Eagles
Richard L. Knight, Susan Knight Skagen
1988, Ecology (69) 1188-1194
We investigated the effects of both asymmetries and differing food levels on contest outcomes of wintering Bald Eagles (Haliaeetus leucocephalus) feeding on chum salmon (Oncorhynchus keta) carcasses. Large eagles, regardless of age, were more successful in pirating than smaller eagles. Small pirating eagles were usually unsuccessful unless they were adults...
Comment and reply on "Sediment-yield history of a small basin in southern Utah, 1937-1976: Implications for land management and geomorphology"
E.B. Nuhfer, Richard Hereford
1988, Geology (16) 759-760
No abstract available....
Use of the instream flow incremental methodology to evaluate influences of microhabitat variability on trout populations in four Colorado Streams
Ken D. Bovee
1988, Book, Western Proceedings: 68th Annual Conference of the Western Association of Fish and Wildlife Agencies
No abstract available....
Selenium teratogenesis in natural populations of aquatic birds in central California
David J. Hoffman, Harry M. Ohlendorf, Thomas W. Aldrich
1988, Archives of Environmental Contamination and Toxicology (17) 519-525
The frequency and types of malformations are described that were encountered during the spring of 1983 in a natural population of aquatic birds exposed to agricultural drainwater ponds and food items containing high concentrations of selenium in central California. A total of 347 nests of aquatic birds containing 1,681 eggs...
Mortality patterns and population sinks for Yellowstone grizzly bears, 1973-1985
R.R. Knight, B.M. Blanchard, L.L. Eberhardt
1988, Wildlife Society Bulletin (16) 121-125
No abstract available....
An exploration geochemical technique for the determination of preconcentrated organometallic halides by ICP-AES
J. M. Motooka
1988, Applied Spectroscopy (42) 1293-1296
An atomic absorption extraction technique which is widely used in geochemical exploration for the determination of Ag, As, Au, Bi, Cd, Cu, Mo, Pb, Sb, and Zn has been modified and adapted to a simultaneous inductively coupled plasma-atomic emission instrument. The experimental and operating parameters are described for the preconcentration...
Status of dugongs in waters around Palau
Galen B. Rathbun, Robert L. Brownell Jr., Katherine Ralls, John Engbring
1988, Marine Mammal Science (4) 265-270
The dugong, Dugong dugon, is widely distributed throughout the Indo-Pacific region in shallow tropical and subtropical waters (Nishiwaki and Marsh 1985).The International Union for Conservation of Nature and Natural Resources lists the species as vulnerable (Thornback and Jenkins 1982), as it is severely depleted or extinct in many parts of...
Duck nest success in the prairie pothole region
Albert T. Klett, Terry L. Shaffer, Douglas H. Johnson
1988, Journal of Wildlife Management (52) 431-440
We estimated nest success of mallard (Anas platyrhynchos), gadwall (A. strepera), blue-winged teal (A. discors), northern shoveler (A. clypeata), and northern pintail (A. acuta) for 5 regions in North Dakota, South Dakota, and Minnesota, for 1-3 periods between 1966 and 1984, and for 8 habitat classes. We obtained composite estimates...
Summer production of coho salmon stocked in Mount St. Helens streams 3-6 years after the 1980 eruption
P.A. Bisson, J.L. Nielsen, J.W. Ward
1988, Transactions of the American Fisheries Society (117) 322-335
We monitored habitat use and summer production of stocked underyearling coho salmon Oncorhynchus kisutch from 1983 to 1986 in three streams affected by the 1980 eruption of Mount St. Helens, Washington. Two streams were in the blast area and one was on a volcanic mudflow terrace, Midsummer water temperatures frequently exceeded presumed...
A new Lower Carboniferous tetrapod locality in Iowa
J.R. Bolt, R.M. McKay, B.J. Witzke, M.P. McAdams
1988, Nature (333) 768-770
The earliest tetrapods known are from two or three Upper Devonian1–3 and some 20 Lower Carboniferous localities in Scotland4 and North America5–8. Most sites yield few and fragmentary specimens; well-preserved and even partially articulated material is exceedingly rare. This report discusses a middle Lower Carboniferous site rich in amphibian and fish...
Problems with surface water models from a user's perspective
K. Thornton, Clair B. Stalnaker, K. Baun
1988, Book, Proceedings of the international symposium on water quality modeling of agricultural non-point sources
No abstract available....
Sublethal landrin toxicity: Behavioral and physiological effects on captive vultures
D.L. Forthman-Quick, E. F. Hill
1988, Journal of Wildlife Management (52) 233-237
Use of conditioned taste aversion (CTA) has been proposed to reduce consumption of California condor (Gymnogyps californianus) eggs by ravens (Corvus corax). Although landrin has induced aversions in ravens and other birds, no data were available on behavioral and physiological effects of landrin on condors, non-target birds that might consume...
Empirical estimates of body drag of large waterfowl and raptors
C.J. Pennycuick, H.H. Obrecht III, M.R. Fuller
1988, Journal of Experimental Biology (135) 253-264
Measurements of the body frontal area of some large living waterfowl (Anatidae) and raptors (Falconiformes) were found to vary with the two-thirds power of the body mass, with no distinction between the two groups. Wind tunnel measurements on frozen bodies gave drag coefficients ranging from 0·25 to 0·39, in the...
Wind tunnel experiments to assess the effect of back-mounted radio transmitters on bird body drag
H.H. Obrecht III, C.J. Pennycuick, M.R. Fuller
1988, Journal of Experimental Biology (135) 265-273
The aerodynamic drag of bird bodies was measured in a wind tunnel, with and without back-mounted dummy radio transmitters. Flight performance estimates indicate that the drag of a large transmitter can cause a substantial reduction of a migrant’s range, that is, the distance it can cover in non-stop flight. The...
The use of Landsat MSS data to map eelgrass in Izembek Lagoon, Alaska
Carl Markon
1988, Conference Paper, Proceedings, resource technology 88: International Symposium on Advanced Technology in Natural Resource Management
No abstract available....
The dissolution of quartz in dilute aqueous solutions of organic acids at 25°C
P.C. Bennett, M.E. Melcer, D. I. Siegel, J.P. Hassett
1988, Geochimica et Cosmochimica Acta (52) 1521-1530
The dissolution of quartz in dilute aqueous solutions of organic acids at 25° and standard pressure was investigated by the batch dissolution method. The bulk dissolution rate of quartz in 20 mmole/Kg citrate solutions at pH 7 was 8 to 10 times faster than that in pure water. After 1750...
Air pollution and wildlife toxicology: An overlooked problem
J.R. Newman, R. K. Schreiber
1988, Environmental Toxicology and Chemistry (7) 381-390
Since the 1880s, there have been repeated reports worldwide of toxic effects to wildlife from air pollution. Incidents in North America were recorded as early as the 1920s and as recently as last year. The effects have ranged from death and injury to increased incidence of infectious diseases, and they are...
Water resources data for Pennsylvania, water year 1987. Volume 2: Susquehanna and Potomac River basins
W.C. Loper, T.E. Behrendt, W.P. Schaffstall
1988, Water Data Report PA-87-2
No abstract available....
Linear solvation energy relationships for toxicity of selected organic chemicals to Daphnia pulex and Daphnia magna
Dora R. M. Passino, James P. Hickey, Anthony M. Frank
1988, Book, Proceedings of the QSAR: third international workshop on quantitative structure-activity relationships in environmental toxicology
In the Laurentian Great Lakes, more than 300 contaminants have been identified in fish, other biota, water, and sediment. Current hazard assessment of these chemicals by the National Fisheries Research Center-Great Lakes is based on their toxicity, occurrence in the environment, and source. Although scientists at the Center have tested...
