Acute exposure to gas-supersaturated water does not affect reproductive success of female adult chinook salmon late in maturation
William L. Gale, A.G. Maule, A. Postera, M.H. Peters
2004, River Research and Applications (20) 565-576
At times, total dissolved gas concentrations in the Columbia and Snake rivers have been elevated due to involuntary spill from high spring runoff and voluntary spill used as a method to pass juvenile salmonids over dams. The goal of this project was to determine if acute exposure to total dissolved...
Habitat use and spatial structure of a barking frog (Eleutherodactylus augusti) population in southeastern Arizona
C.S. Goldberg, C.R. Schwalbe
2004, Journal of Herpetology (38) 305-312
Barking Frogs (Eleutherodactylus augusti) are the northernmost ranging member of the large tropical family Leptodactylidae. We investigated the ecology of this saxicolous species at the northern edge of its range in a canyon in southern Arizona. We captured 54 frogs on discontinuous rock outcrops; eight of nine females and 39...
Biochemical, histological and behavioural aspects of visual function during early development of rainbow trout
Paulo S. M. Carvalho, Douglas B. Noltie, D. E. Tillitt
2004, Journal of Fish Biology (64) 833-850
Retinal structure and concentration of retinoids involved in phototransduction changed during early development of rainbow trout Oncorhynchus mykiss, correlating with improvements in visual function. A test chamber was used to evaluate the presence of optokinetic or optomotor responses and to assess the functionality of the integrated cellular, physiological and biochemical...
Foraging distance and home range of Cassin's Auklets nesting at two colonies in the California Channel Islands
Josh Adams, John Y. Takekawa, Harry R. Carter
2004, Condor (106) 618-637
We radio-marked 99 Cassin's Auklets (Ptychoramphus aleuticus) nesting at two colonies, Prince Island and Scorpion Rock, separated by 90 km in the California Channel Islands to quantify foraging distance, individual home-range area, and colony-based foraging areas during three consecutive breeding seasons. Auklets generally foraged < 30 km from each colony...
Seasonal movement and home range of the Mariana Common Moorhen
L.L. Takano, S. M. Haig
2004, Condor (106) 652-663
Adult Mariana Common Moorhens (Gallinula chloropus guami) were radio-marked on Guam (n = 25) and Saipan (n = 18) to determine home range, inter- and intraseasonal space use, and movement patterns among the Mariana Islands of Guam, Saipan, Tinian, and Rota. Birds were tracked throughout the dry and wet seasons...
Reaction rim growth on olivine in silicic melts: Implications for magma mixing
Michelle L. Coombs, James E. Gardner
2004, American Mineralogist (89) 748-759
Finely crystalline amphibole or pyroxene rims that form during reaction between silicic host melt and cognate olivine xenocrysts, newly introduced during magma mixing events, can provide information about the timing between mixing and volcanic eruptions. We investigated rim growth experimentally by placing forsteritic olivine in rhyolitic and rhyodacitic melts for...
Gasoline-related organics in Lake Tahoe before and after prohibition of carbureted two-stroke engines
M.S. Lico
2004, Lake and Reservoir Management (20) 164-174
On June 1, 1999, carbureted two-stroke engines were banned on waters within the Lake Tahoe Basin of California and Nevada. The main gasoline components MTBE (methyl tert-butyl ether) and BTEX (benzene, toluene, ethylbenzene, and xylenes) were present at detectable concentrations in all samples taken from Lake Tahoe during 1997–98 prior to...
US Rockies gas focus points up need for access, risk takers, infrastructure
M.R. Thomasson, P.E. Belanger, L. Cook
2004, Oil & Gas Journal (102)
The last 20 yr of the Rocky Mountains oil and gas exploration and production business have been turbulent. Most of the major companies have left; they have been replaced with, independents and small to larger private and public companies. Natural gas become the primary focus of exploration. A discussion covers...
Nesting biology of three grassland passerines in the northern tallgrass prairie
Maiken Winter, Douglas H. Johnson, Jill A. Shaffer, W. Daniel Svedarsky
2004, The Wilson Bulletin (116) 211-223
Basic nesting information on grassland passerines is needed for improving grassland bird management. Among the information needs are (1) the suitability of nesting habitat, (2) periods during the breeding season in which birds are most vulnerable to disturbances, and (3) how to fit grasslands into a prioritization scheme for conservation....
Natural hybrids of the madtoms, Noturus flavus and Noturus insignis, from the Monongahela River drainage, West Virginia
S.A. Welsh, Dan A. Cincotta
2004, Northeastern Naturalist (11) 399-406
Natural hybridization is rare in the family Ictaluridae. Putative hybrids of the madtoms Noturus flavus and N. insignis were collected from Blackwater River, Monongahela River drainage, WV. Noturus flavus is native to the Monongahela River drainage, whereas N. insignis is nonnative. We quantified morphological differences among N. flavus, N. insignis,...
Improving biodiversity knowledge with dataset synergy: A case study of non-native plants in Colorado
C.S. Crosier, T.J. Stohlgren
2004, Weed Technology (18) 1441-1444
Species lists are important tools for managing biodiversity, including controlling nonnative species, but they are either incomplete or lacking for many areas. Our objective was to illustrate how the synergy of disparate data sets can increase knowledge of species distributions while minimizing further field expenditures. We compared five different data...
Subspecific relationships and genetic structure in the spotted owl
Susan M. Haig, E.D. Forsman, Thomas D. Mullins
2004, Conservation Genetics (5) 683-705
Hierarchical genetic structure was examined in the three geographically-defined subspecies of spotted owl (Strix occidentalis) to define relationships among subspecies and quantify variation within and among regional and local populations. Sequences (522 bp) from domains I and II of the mitochondrial control region were analyzed for 213 individuals from 30 local breeding...
From the Field: Efficacy of visual barriers in reducing black-tailed prairie dog colony expansion
J.W. Merriman, P.J. Zwank, C. W. Boal, T.L. Bashore
2004, Conference Paper, Wildlife Society Bulletin
[No abstract available]...
Lake Powell management alternatives and values: CVM estimates of recreation benefits
A. J. Douglas, D.A. Harpman
2004, Water International (29) 375-383
This paper presents data analyses based on information gathered from a recreation survey distributed during the spring of 1997 at Lake Powell. Recreation-linked management issues are the foci of the survey and this discussion. Survey responses to contingent valuation method (CVM) queries included in the questionnaire quantify visitor recreation values....
Fishes and habitat characteristics of the Keya Paha River, South Dakota-Nebraska
B. Harland, C. R. Berry Jr.
2004, Journal of Freshwater Ecology (19) 169-177
Fishes were collected in four mainstem reaches and eight tributary reaches in the Keya Paha River basin during May and June 2002. Most reaches were characteristically run habitats with sand substrates and riparian pastures. Data were combined with historical records to construct a basin-wide ichthyofaunal list which comprised 38 species...
Triggered deformation and seismic activity under Mammoth Mountain in Long Valley caldera by the 3 November 2002 Mw 7.9 Denali fault earthquake
M.J.S. Johnston, S. G. Prejean, D.P. Hill
2004, Bulletin of the Seismological Society of America (94) S360-S369
The 3 November 2002 Mw 7.9 Denali fault earthquake triggered deformational offsets and microseismicity under Mammoth Mountain (MM) on the rim of Long Valley caldera, California, some 3460 km from the earthquake. Such strain offsets and microseismicity were not recorded at other borehole strain sites along the San Andreas fault...
Postfire management in forested public lands of the western USA
R. L. Beschta, J.J. Rhodes, J.B. Kauffman, Robert E. Gresswell, G.W. Minshall, C.A. Frissell, D.A. Perry, R. Hauer
2004, Conservation Biology (18) 957-967
Forest ecosystems in the western United States evolved over many millennia in response to disturbances such as wildfires. Land use and management practices have altered these ecosystems, however, including fire regimes in some areas. Forest ecosystems are especially vulnerable to postfire management practices because such practices may influence forest dynamics...
Optical characteristics of natural waters protect amphibians from UV-B in the U.S. Pacific Northwest: Reply
Wendy J. Palen, Daniel E. Schindler, M. J. Adams, Christopher A. Pearl, R. Bruce Bury, S. A. Diamond
2004, Ecology (85) 1754-1759
Few ecologists would dispute that exposure to high levels of ultraviolet-B radiation (UV-B) is detrimental to organisms. It is well established that UV-B has been a critical factor shaping the physiology (Blum et al. 1949, Hansson 2000), behavior (Pennington and Emlet 1986, van de Mortel and Buttemer 1998), and distribution (Williamson et...
Using an ecoregion framework to analyze land-cover and land-use dynamics.
Alisa L. Gallant, Thomas R. Loveland, Terry L. Sohl, D.E. Napton
2004, Environmental Management (34) S89-S110
The United States has a highly varied landscape because of wide-ranging differences in combinations of climatic, geologic, edaphic, hydrologic, vegetative, and human management (land use) factors. Land uses are dynamic, with the types and rates of change dependent on a host of variables, including land accessibility, economic considerations, and the...
Lattice-Boltzmann simulation of coalescence-driven island coarsening
H. Basagaoglu, C.T. Green, P. Meakin, B.J. McCoy
2004, Journal of Chemical Physics (121) 7987-7995
The first-order phase separation in a thin fluid film was simulated using a two-dimensional lattice-Boltzman model (LBM) with fluid-fluid interactions. The effects of the domain size on the intermediate asymptotic island size distribution were also discussed. It was observed that the overall process is dominated by coalescence which is independent...
Analytical error in the identification of fibrous and asbestiform amphiboles: Implications for the analytical and regulatory communities
G.P. Meeker, H.A. Lowers
2004, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
Phytosociological study of the dwarf shrub heath of Simeonof Wilderness, Shumagin Islands, Southwestern Alaska
Fred J.A. Daniels, Stephen S. Talbot, Sandra L. Talbot, Wilfred B. Schofield
2004, Phytocoenologia (34) 465-489
The maritime dwarf shrub heath vegetation of the Northern Pacific, Simeonof Island, Shumagin Islands, Southwestern Alaska, was studied according to the Braun-Blanquet approach. Based on 30 releve??s of 16 m2 that include vascular plants, bryophytes, and lichens, two new associations could be described belonging to the class Loiseleurio-Vaccinietea (order Rhododendro-Vaccinietalia):...
Colorado Canyons National Conservation Area 2003 visitor use survey: Completion report
Phadrea Ponds, Shana C. Gillette, Lynne Koontz
2004, Open-File Report 2004-1281
This report represents the analysis of research conducted by the U.S. Geological Survey (USGS) for the Bureau of Land Management (BLM). The purpose is to provide socio-economic and recreational use information that can be used in the development of a Resource Management Plan (RMP) for the Colorado Canyons National Conservation...
Stratton Sagebrush Hydrology Study Area: An annotated bibliography of research conducted 1968-1990
Leah M. Burgess, Kathryn A. Schoenecker
2004, Open-File Report 2004-1291
This annotated bibliography provides an overview of research projects conducted on the Stratton Sagebrush Hydrology Study Area (Stratton) since its designation as such in 1967. Sources include the Rocky Mountain Forest and Range Experiment Station records storage room, Laramie, Wyoming, the USGS and USFS online reference libraries, and scientific journal...
Quality assurance report - Loch Vale watershed, 1999-2002
Jorin A. Botte, Jill Baron
2004, Open-File Report 2004-1306
The National Park Service initiated the Loch Vale Watershed (LVWS) project in 1980 with funding from the Aquatic Effects Research Program of the National Acid Precipitation Assessment Program. Long-term ecological research and monitoring address watershed-scale ecosystem processes, particularly as they respond to atmospheric deposition and climate variability. Monitoring of meteorological,...
