Stratigraphy, lithologies, and sedimentary structures of Owens Lake core OL-92
George I. Smith
George I. Smith, James L. Bischoff, editor(s)
1997, Book chapter, An 800,000-year paleoclimatic record from core OL-92, Owens Lake, Southeast California
Owens Lake, a now-dry lake in southeastern California immediately east of the southern Sierra Nevada, was the site of a coring project designed to obtain a long paleoclimatic record. During the ensuing study, lacustrine deposits were recovered by the 323 m long core designated “OL-92.” The presence of the Bishop...
Geochemical modeling of water-rock interactions in mining environments
Charles N. Alpers, D. Kirk Nordstrom
Geoffrey S. Plumlee, M.J. Logsdon, L.F. Filipek, editor(s)
1997, Book chapter, The environmental geochemistry of mineral deposits: Part A: Processes, techniques, and health issues part B: Case studies and research topics
Geochemical modeling is a powerful tool for evaluating geochemical processes in mining environments. Properly constrained and judiciously applied, modeling can provide valuable insights into processes controlling the release, transport, and fate of contaminants in mine drainage. This chapter contains 1) an overview of geochemical modeling, 2) discussion of the types...
Mass balance approach to selenium cycling through the San Joaquin Valley, sources to river to bay
Theresa S. Presser, David Z. Piper
R. A. Engberg, editor(s)
1997, Book chapter, Environmental chemistry of selenium
Surface and ground waters of the Central Valley of California (e.g., rivers, dams, off-stream storage reservoirs, pumping facilities, irrigation and drinking water supply canals, agricultural drainage canals) are part of a hydrologic system that makes up a complex ecosystem extending from the riparian wetlands of the Sacramento and San Joaquin...
Level II scour analysis for Bridge 19 (SHEFTH00440019) on Town Highway 44, crossing Trout Brook, Sheffield, Vermont
Emily C. Wild, Laura Medalie
1997, Open-File Report 97-817
This report provides the results of a detailed Level II analysis of scour potential at structure SHEFTH00440019 on Town Highway 44 crossing Trout Brook, Sheffield, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour (U.S....
Level II scour analysis for Bridge 8 (ATHETH00090008) on Town Highway 9, crossing Bull Creek, Athens, Vermont
Erick M. Boehmler, Ronda L. Burns
1997, Open-File Report 97-818
This report provides the results of a detailed Level II analysis of scour potential at structure ATHETH00090008 on Town Highway 9 crossing Bull Creek in Athens, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour...
Level II scour analysis for Bridge 16, (NEWBTH00500016) on Town Highway 50, crossing Halls Brook, Newbury, Vermont
Ronda L. Burns, James R. Degnan
1997, Open-File Report 97-814
This report provides the results of a detailed Level II analysis of scour potential at structure NEWBTH00500016 on Town Highway 50 crossing Halls Brook, Newbury, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour (U.S....
Level II scour analysis for Bridge 8, (MANCTH00060008) on Town Highway 6, crossing Bourn Brook, Manchester, Vermont
Ronda L. Burns, Robert E. Hammond
1997, Open-File Report 97-813
This report provides the results of a detailed Level II analysis of scour potential at structure MANCTH00060008 on Town Highway 6 crossing Bourn Brook, Manchester, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour (U.S....
Level II scour analysis for Bridge 81 (MARSUS00020081) on U.S. Highway 2, crossing the Winooski River, Marshfield, Vermont
Michael A. Ivanoff
1997, Open-File Report 97-809
This report provides the results of a detailed Level II analysis of scour potential at structure MARSUS00020081 on U.S. Highway 2 crossing the Winooski River, Marshfield, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour...
Level II scour analysis for Bridge 30, (HUNTTH00220030), on Town Highway 22, crossing Brush Brook, Huntington, Vermont
Ronda L. Burns
1997, Open-File Report 97-816
This report provides the results of a detailed Level II analysis of scour potential at structure HUNTTH00220030 on Town Highway 22 crossing Brush Brook, Huntington, Vermont (figures 1–8). A Level II study is a basic engineering analysis of the site, including a quantitative analysis of stream stability and scour (U.S....
Validation of behave fire behavior predictions in oak savannas
Keith W. Grabner, John Dwyer, Bruce E. Cutter
1997, General Technical Report NC-188
Prescribed fire is a valuable tool in the restoration and management of oak savannas. BEHAVE, a fire behavior prediction system developed by the United States Forest Service, can be a useful tool when managing oak savannas with prescribed fire. BEHAVE predictions of fire rate-of-spread and flame length were validated using...
An empirical comparison of stock identification techniques applied to striped bass
John R. Waldman, R. Anne Richards, W. Bane Schill, Isaac Wirgin, Mary C. Fabrizio
1997, Transactions of the American Fisheries Society (126) 369-385
Managers of migratory striped bass stocks that mix along the Atlantic coast of the USA require periodic estimates of the relative contributions of the individual stocks to coastal mixed- stock fisheries; however, to date, a standard approach has not been adopted. We compared the performances of alternative stock identification...
Prevention of fin erosion rainbow trout, Onchorynchus mykiss, by dietary modification
F.T. Barrows, W.A. Lellis
1997, Bozeman Information Leaflet 86
No abstract available at this time...
Toxicity to Daphnia pulex and QSAR predictions for polycyclic hydrocarbons representative of Great Lakes contaminants
D.R. Passino-Reader, J.P. Hickey, L.M. Ogilvie
1997, Bulletin of Environmental Contamination and Toxicology (59) 834-840
The objectives of this study were (1) to determine the toxicity of several types of polycyclic hydrocarbons characteristic of Great Lakes samples to Daphnia pulex, a Great Lakes zooplankter, (2) to investigate the influence of different structural characteristics on toxicity, and (3) to determine the linear solvation energy relationship (LSER)...
Distribution of black-tailed jackrabbit habitat determined by GIS in southwestern Idaho
Steven T. Knick, D.L. Dyer
1997, Journal of Wildlife Management (61) 75-85
We developed a multivariate description of black-tailed jackrabbit (Lepus californicus) habitat associations from Geographical Information Systems (GIS) signatures surrounding known jackrabbit locations in the Snake River Birds of Prey National Conservation Area (NCA), in southwestern Idaho. Habitat associations were determined for characteristics within a 1-km radius (approx home range size)...
Interactive effects of prey and weather on golden eagle reproduction
Karen Steenhof, Michael N. Kochert, T. L. McDonald
1997, Journal of Animal Ecology (66) 350-362
1. The reproduction of the golden eagle Aquila chrysaetos was studied in southwestern Idaho for 23 years, and the relationship between eagle reproduction and jackrabbit Lepus californicus abundance, weather factors, and their interactions, was modelled using general linear models. Backward elimination procedures were used to arrive at parsimonious models.2. The...
Methods for evaluating crown area profiles of forest stands
Michael E. Dubrasich, D.W. Hann, J. C. Tappeiner II
1997, Canadian Journal of Forest Research (27) 385-392
Canopy architectures of five structurally complex forest stands and three structurally simple forest stands in southwest Oregon and the Willamette Valley, Oregon, were evaluated and quantified through crown area profiles. Mixed conifer and mixed conifer hardwood stands across a range of sites were sampled for crown widths and heights. Crown...
An energy-circuit population model for great egrets (Ardea alba) at Lake Okeechobee, Florida, U.S.A
Jeff P. Smith
1997, Ecological Modelling (97) 1-21
I simulated the annual population cycles of Great Egrets (Ardea alba) at Lake Okeechobee, Florida, to provide a framework for evaluating the local population dynamics of nesting and foraging wading birds. The external forcing functions were solar energy, minimum air temperature, water depth, surface-water drying rate, and season. Solar input...
Holocene vegetation and historic grazing impacts at Capitol Reef National Park reconstructed using packrat middens
K.L. Cole, N. Henderson, D.S. Shafer
1997, Great Basin Naturalist (57) 315-326
Mid- to late-Holocene vegetation change from a remote high-desert site was reconstructed using plant macrofossils and pollen from 9 packrat middens ranging from 0 to 5400 yr in age. Presettlement middens consistently contained abundant macrofossils of plant species palatable to large herbivores that are now absent or reduced, such as...
Factors controlling threshold friction velocity in semiarid and arid areas of the United States
Beatrice Marticorena, G. Bergametti, Jayne Belnap
1997, Journal of Geophysical Research (102) 23,277-23,287
A physical model was developed to explain threshold friction velocities u*t for particles of the size 60a??120 I?m lying on a rough surface in loose soils for semiarid and arid parts of the United States. The model corrected for the effect of momentum absorption by the nonerodible roughness. For loose...
Using mark-recapture methods to estimate fish abundance in small mountain lakes
Robert E. Gresswell, W.J. Liss, G.A. Lomnicky, E. Deimling, Robert L. Hoffman, T. Tyler
1997, Northwest Science (71) 39-44
The majority of lacustrine fish populations in the western USA are located far from the nearest road. Although mark-recapture techniques are widely accepted for estimating population abundance, these techniques have been broadly ignored for fisheries surveys in remote mountain lakes because of restricted access and associated logistical constraints. In this study, mark recapture...
Reforestation of bottomland hardwoods and the issue of woody species diversity
J. A. Allen
1997, Restoration Ecology (5) 125-134
Bottomland hardwood forests in the southcentral United States have been cleared extensively for agriculture, and many of the remaining forests are fragmented and degraded. During the last decade, however, approximately 75,000 ha of land-mainly agricultural fields-have been replanted or contracted for replanting, with many more acres likely to be reforested...
The loss of hyperosmoregulatory ability in migrating juvenile American shad, Alosa sapidissima
Joseph D. Zydlewski, S. D. McCormick
1997, Canadian Journal of Fisheries and Aquatic Sciences (54) 2377-2387
Investigations on juvenile American shad (Alosa sapidissima) revealed several physiological changes associated with downstream migration. Plasma chloride decreased 20% in wild juvenile shad during the autumn migration. Migrants had lower condition factor and hematocrit than non-migrant shad captured by beach seining. Gill Na + ,K + -ATPase activity of migrant...
A GIS model to predict black bear habitat use
F.T. Van Manen, M.R. Pelton
1997, Journal of Forestry (95) 6-12
No abstract available....
Prey patchiness and larval fish growth and survival: inferences from an individual-based model
Benjamin H. Letcher, James A. Rice
1997, Ecological Modelling (95) 29-43
We used an individual-based simulation model to evaluate how prey patchiness and fish swimming behavior affect larval fish survival and mortality source (predation or starvation). Simulations revealed that cohort survival increased linearly with greater average patch residence times and that patch residence times for individual fish with different fates (survived,...
Modeling gas transfer in a spray tower oxygen absorber
Brian J. Vinci, Barnaby J. Watten, Michael Timmons
1997, Aquacultural Engineering (16) 91-105
A computer model characterizing the performance of a spray tower oxygen absorption system was developed based on finite difference mass transfer calculations. Performance was assessed in terms of oxygen utilization, transfer efficiency, and economy. Pilot scale tests verified model assumptions and performance predictions. Simulation runs indicated spray tower head and...
