High-resolution climatic evolution of coastal northern California during the past 16,000 years
J.A. Barron, L. Heusser, T. Herbert, M. Lyle
2003, Paleoceanography (18) 20-1-20-19
Holocene and latest Pleistocene oceanographic conditions and the coastal climate of northern California have varied greatly, based upon high-resolution studies (ca. every 100 years) of diatoms, alkenones, pollen, CaCO3%, and total organic carbon at Ocean Drilling Program (ODP) Site 1019 (41.682°N, 124.930°W, 980 m water depth). Marine climate proxies (alkenone...
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2002: Revised for corrected spill annual report
S.D. Evans, L.S Wright, R.E. Wardell, N.S. Adams, D.W. Rondorf
2003, Report
Abstract not available...
Post-release attributes and survival of hatchery and natural fall Chinook salmon in the Snake River. Annual report 2000-2001
K.F. Tiffan, D.W. Rondorf, W.P. Connor
2003, Report
Abstract not available ...
Information on status, demographics, and life history of five populations of tui chub in the Cow Head Lake Slough Basin
G.G. Scoppettone, P.H. Rissler
2003, Report
Abstract not available ...
Behavior and migratory delay of radio-tagged juvenile spring Chinook salmon and steelhead through Lower Granite Dam and reservoir during a drought year. 2001
J.M. Plumb, M.S. Novick, A.C. Braatz, J.N. Lucchesi, J.M. Sprando, N.S. Adams, D.W. Rondorf
2003, Report
Abstract not available ...
Historical changes in the Columbia River estuary based on sediment cores: feasibility studies
J.H. Petersen, R. Reisenbichler, G.R. Gelfenbaum, C. Peterson, D. Baker, P.R. Leavitt, C.A. Simenstad, F.G. Prahl
2003, Report
The importance of the Columbia River estuary to salmon, other fishes, migratory birds, and other species is fairly well established. Relatively little is known, however, about long-term, historic variations in biological processes and conditions within the estuary. For example, have conditions varied greatly with climatic regime shifts and how has...
Turbine survival and migration behavior of subyearling Chinook salmon at McNary Dam, 2003
R.W. Perry, S.D. Fielding, A.D. Cochran, J.L. Schei, J.M. Sprando, G.T. George, N.S. Adams, D.W. Rondorf
2003, Report
Abstract not available ...
Behavior and survival of radio-tagged juvenile Chinook salmon and steelhead relative to the performance of a removable spillway weir at Lower Granite Dam, Washington, 2003
J.M. Plumb, A.C. Braatz, J.N. Lucchesi, S.D. Fielding, A.D. Cochran, T.K. Nation, J.M. Sprando, J.L. Schei, R.W. Perry, N.S. Adams, D.W. Rondorf
2003, Report
Abstract not available ...
Wilderness experience in Rocky Mountain National Park 2002; report to respondents
Elke Schuster, S. Shea Johnson, Jonathan G. Taylor
2003, Open-File Report 2003-444
A substantial amount of backcountry (about 250,000 acres) in Rocky Mountain National Park [RMNP of the Park] may be designated as wilderness areas in the coming years. Currently, over 3 million visitors drives through the park on Trail Ridge Road, camp in designated campgrounds, day hike, etc. each year. Many...
Small-mammal density estimation: A field comparison of grid-based vs. web-based density estimators
R.R. Parmenter, Terry L. Yates, David R. Anderson, K.P. Burnham, J.L. Dunnum, A.B. Franklin, M.T. Friggens, B. C. Lubow, Michael Miller, G.S. Olson, Cheryl A. Parmenter, J. Pollard, E. Rexstad, T.M. Shenk, T.R. Stanley, Gary C. White
2003, Ecological Monographs (73) 1-26
Statistical models for estimating absolute densities of field populations of animals have been widely used over the last century in both scientific studies and wildlife management programs. To date, two general classes of density estimation models have been developed: models that use data sets from capture–recapture or removal sampling techniques...
Effects of ultraviolet radiation on toad early life stages
E. E. Little, R.D. Calfee, D. L. Fabacher, C. Carey, V. S. Blazer, E.M. Middleton
2003, Environmental Science and Pollution Research (10) 167-172
BackgroundExposure to harmful levels of ultraviolet-B radiation (UVB), a component of solar radiation, has been suggested as a potential cause of amphibian declines.MethodsWe measured solar radiation (UVB, ultraviolet-A, and visible) wavebands in breeding ponds of Bufo boreas (boreal toad, a montane species that has undergone severe population declines)...
Environmental characteristics and benthic invertebrate assemblages in Colorado mountain lakes
B. M. LaFrancois, D.M. Carlisle, K. R. Nydick, B. M. Johnson, Jill Baron
2003, Western North American Naturalist (63) 137-154
Twenty-two high-elevation lakes (>3000 m) in Rocky Mountain National Park and Indian Peaks Wilderness Area, Colorado, were surveyed during summer 1998 to explore relationships among benthic invertebrates, water chemistry (particularly nitrate concentrations), and other environmental variables. Water samples were collected from the deepest portion of each lake and analyzed for...
The high-elevation population of Mountain Plovers in Colorado
Michael B. Wunder, F.L. Knopf, C.A. Pague
2003, The Condor (105) 654-662
We surveyed a discrete population of Mountain Plovers (Charadrius montanus) in South Park, Park County, Colorado, to determine the size and relative contribution of this geographically isolated area to the global population of plovers. First, we mapped potential plover habitat within South Park based on landform and vegetation descriptors. Second,...
A conservation plan for native fishes of the Lower Colorado River
W.L. Minckley, P.C. Marsh, J.E. Deacon, T.E. Dowling, P.W. Hedrick, W.J. Matthews, G. Mueller
2003, BioScience (53) 219-234
The native fish fauna of the lower Colorado River, in the western United States, includes four “big-river” fishes that are federally listed as endangered. Existing recovery implementation plans are inadequate for these critically imperiled species. We describe a realistic, proactive management program founded on demographic and genetic principles and crafted...
A radio transmitter belt for small ranid frogs
E. Muths
2003, Herpetological Review (34) 345-348
Radio telemetry is a useful technique for gathering information about amphibians when associated caveats are applied (Bartelt and Peterson 2000). A number of designs for transmitter attachment are available for larger anurans including a harness-type attachment (van Nuland and Claus 1981) and various belt designs (Bartelt and Peterson 2000; Rathbun...
Protocols for long-term monitoring of seabird ecology in the Gulf of Alaska
John F. Piatt, G. Vernon Byrd, Ann Harding, Arthur B. Kettle, Sasha Kitaysky, Michael A. Litzow, David G. Roseneau, Michael T. Shultz, Thomas I. van Pelt
2003, Report
Seabird populations will need to be monitored for many years to assess both recovery and ecological conditions affecting recovery. Detailed studies of individual seabird colonies and marine ecosystems in the Gulf of Alaska have been conducted by the U.S. Geological Survey and U.S. Fish and Wildlife Service under the...
Recent ecological and biogeochemical changes in alpine lakes of Rocky Mountain National Park (Colorado, USA): A response to anthropogenic nitrogen deposition
A.P. Wolfe, A.C. Van Gorp, Jill Baron
2003, Geobiology (1) 153-168
Dated sediment cores from five alpine lakes (>3200 m asl) in Rocky Mountain National Park (Colorado Front Range, USA) record near-synchronous stratigraphic changes that are believed to reflect ecological and biogeochemical responses to enhanced nitrogen deposition from anthropogenic sources. Changes in sediment proxies include progressive increases in the frequencies of mesotrophic...
Habitat heterogeneity on a forest-savanna ecotone in Noel Kempff Mercado National Park (Santa Cruz, Bolivia)—implications for the long-term conservation of biodiversity in a changing climate
T.J. Killeen, T.M. Siles, T. Grimwood, L.L. Tieszen, M.K. Steininger, C.J. Tucker, S. Panfil
G.A. Bradshaw, P.A. Marquet, K.L. Ronnenberg, editor(s)
2003, Book chapter, How landscapes change— Human disturbance and ecosystem fragmentation in the Americas
No abstract available....
Zebra mussels (Dreissena polymorpha) limit food for larval fish (Pimephales promelas) in turbulent systems: a bioenergetics analysis
L.A. Bartsch, W. B. Richardson, M.B. Sandheinrich
2003, Hydrobiologia (495) 59-72
We conducted a factorial experiment, in outdoor mesocosms, on the effects of zebra mussels and water column mixing (i.e., turbulence) on the diet, growth, and survival of larval fathead minnows (Pimephales promelas). Significant (P < 0.05) larval mortality occurred by the end of the experiment with the highest mortality (90%)...
Shifts in the diets of slimy sculpin (Cottus cognatus) and lake whitefish (Coregonus clupeaformis) in Lake Ontario following the collapse of the burrowing amphipod Diporeia
Randall W. Owens, Dawn E. Dittman
2003, Aquatic Ecosystem Health & Management (6) 311-323
In Lake Ontario, the diets of slimy sculpin Cottus cognatus and lake whitefish Coregonus clupeaformis shifted from a diet dominated by the burrowing amphipod, Diporeia, and to a lesser extent, Mysis, to a more diverse diet, after Diporeia collapsed, to one dominated by Mysis and prey that were formerly less...
Large woody debris and flow resistance in step-pool channels, Cascade Range, Washington
Janet H. Curran, Ellen E. Wohl
2003, Geomorphology (51) 141-157
Total flow resistance, measured as Darcy-Weisbach f, in 20 step-pool channels with large woody debris (LWD) in Washington, ranged from 5 to 380 during summer low flows. Step risers in the study streams consist of either (1) large and relatively immobile woody debris, bedrock, or roots that form fixed, or...
Estimating lake-wide abundance of spawning-phase sea lampreys (Petromyzon marinus) in the Great Lakes: extrapolating from sampled streams using regression models
Katherine M. Mullett, John W. Heinrich, Jean V. Adams, Robert J. Young, Mary P. Henson, Rodney B. McDonald, Michael F. Fodale
2003, Journal of Great Lakes Research (29) 240-252
Lake-wide abundance of spawning-phase sea lampreys (Petromyzon marinus) can be used as one means to evaluate sea lamprey control efforts in the Great Lakes. Lake-wide abundance in each Great Lake was the sum of estimates for all streams thought to contribute substantial numbers of sea lampreys. A subset of these...
Compensatory mechanisms in Great Lakes sea lamprey populations: implications for alternative control strategies
Michael L. Jones, R.A. Bergstedt, Michael B. Twohey, Michael F. Fodale, Douglas W. Cuddy, Jeffrey W. Slade
2003, Journal of Great Lakes Research (29) 113-129
Compensatory mechanisms are demographic processes that tend to increase population growth rates at lower population density. These processes will tend to reduce the effectiveness of actions that use controls on reproductive success to suppress sea lamprey (Petromyzon marinus), an economically important pest in the Great Lakes. Historical evidence for compensatory...
Montioring Giant Garter Snakes at Colusa National Wildlife Refuge: 2002 Progress Report
Glenn D. Wylie, Michael L. Casazza, Lisa L. Martin
2003, Report
No abstract available at this time...
Responses of small terrestrial vertebrates to roads in a coastal sage scrub ecosystem
C.S. Brehme
2003, Thesis
No abstract available at this time...
