Movement, home range, and site fidelity of bluegills in a Great Plains Lake
C.P. Paukert, D.W. Willis, M.A. Bouchard
2004, North American Journal of Fisheries Management (24) 154-161
Little is known about the distribution, movement, and home ranges of bluegills Lepomis macrochirus in lentic environments. Therefore, the objectives of this study were to evaluate the seasonal and diel differences in movement rates, site fidelity, and home range of bluegills in a shallow, natural Great Plains lake. A total...
National Wildlife Health Center Quarterly Mortality Report
K. A. Converse, R. Sohn, Kimberli J.G. Miller, G. McLaughlin
2004, Supplement to the Journal of Wildlife Diseases (40)
Monitoring suspended sediment and associated trace element and nutrient fluxes in large river basins in the USA
A. J. Horowitz
2004, Conference Paper, IAHS-AISH Publication
In 1996, the US Geological Survey converted its occurrence and distribution-based National Stream Quality Accounting Network (NASQAN) to a national, flux-based water-quality monitoring programme. The main objective of the revised programme is to characterize large USA river basins by measuring the fluxes of selected constituents at critical nodes in various...
Subsurface fate of spilled petroleum hydrocarbons in continuous permafrost
K. McCarthy, L. Walker, L. Vigoren
2004, Cold Regions Science and Technology (38) 43-54
Accidental releases of approximately 2000 m3 of fuel have resulted in subsurface contamination adjacent to Imikpuk Lake, a drinking-water source near Barrow, AK. This paper presents a conceptual model of the distribution and transport of subsurface free-phase hydrocarbons at this site. The mean annual temperature in Barrow is -13 ??C,...
Effects of dissolved carbonate on arsenate adsorption and surface speciation at the hematite-water interface
Y. Arai, D.L. Sparks, J.A. Davis
2004, Environmental Science & Technology (38) 817-824
Effects of dissolved carbonate on arsenate [As(V)] reactivity and surface speciation at the hematite−water interface were studied as a function of pH and two different partial pressures of carbon dioxide gas [PCO2 = 10-3.5 atm and ∼0; CO2-free argon (Ar)] using adsorption kinetics, pseudo-equilibrium adsorption/titration experiments, extended X-ray absorption...
ArcCN-Runoff: An ArcGIS tool for generating curve number and runoff maps
X. Zhan, M.-L. Huang
2004, Environmental Modelling and Software (19) 875-879
The development and the application of ArcCN-Runoff tool, an extension of ESRI@ ArcGIS software, are reported. This tool can be applied to determine curve numbers and to calculate runoff or infiltration for a rainfall event in a watershed. Implementation of GIS techniques such as dissolving, intersecting, and a curve-number reference...
Spawning ecology of finespotted Snake River cutthroat trout in spring streams of the Salt River valley, Wyoming
M. P. Joyce, W.A. Hubert
2004, Western North American Naturalist (64) 78-85
We studied spawning ecology of cutthroat trout (Oncorhynchus clarki) in streams that originate as springs along the Salt River, a Snake River tributary in western Wyoming. We assessed (1) relative numbers of upstream-migrant and resident adults present during the spawning period in spring streams, (2) influence of habitat modification on...
Emissions pathways, climate change, and impacts on California
K. Hayhoe, D. Cayan, C.B. Field, P.C. Frumhoff, E.P. Maurer, N.L. Miller, S.C. Moser, S.H. Schneider, K.N. Cahill, E.E. Cleland, L. Dale, R. Drapek, R.M. Hanemann, L.S. Kalkstein, J. Lenihan, C.K. Lunch, R.P. Neilson, S.C. Sheridan, J.H. Verville
2004, Proceedings of the National Academy of Sciences of the United States of America (101) 12422-12427
The magnitude of future climate change depends substantially on the greenhouse gas emission pathways we choose. Here we explore the implications of the highest and lowest Intergovernmental Panel on Climate Change emissions pathways for climate change and associated impacts in California. Based on climate projections from two state-of-the-art climate models...
Holocene fault scarps near Tacoma, Washington, USA
B.L. Sherrod, T.M. Brocher, C.S. Weaver, R.C. Bucknam, R.J. Blakely, H.M. Kelsey, A.R. Nelson, R. Haugerud
2004, Geology (32) 9-12
Airborne laser mapping confirms that Holocene active faults traverse the Puget Sound metropolitan area, northwestern continental United States. The mapping, which detects forest-floor relief of as little as 15 cm, reveals scarps along geophysical lineaments that separate areas of Holocene uplift and subsidence. Along one such line of scarps, we...
Use of an electromagnetic seepage meter to investigate temporal variability in lake seepage
D.O. Rosenberry, R. H. Morin
2004, Ground Water (42) 68-77
A commercially available electromagnetic flowmeter is attached to a seepage cylinder to create an electromagnetic seepage meter (ESM) for automating measurement of fluxes across the sediment/water interface between ground water and surface water. The ESM is evaluated through its application at two lakes in New England, one where water seeps...
Pocomoke Sound Sedimentary and Ecosystem History
Thomas M. Cronin
2004, Open-File Report 2004-1350
Summary of Results: Pocomoke Sound Sediment and Sediment Processes Transport of sediment from coastal marshes. Analyses of pollen and foraminifera from surface sediments in Pocomoke Sound suggest that neither the upstream forested wetlands nor coastal marshes bordering the sound have contributed appreciably to particulate matter in the 10- to 1000-micron size...
Are the circular, dark features on Comet Borrelly's surface albedo variations or pits?
R.M. Nelson, L.A. Soderblom, B.W. Hapke
2004, Icarus (167) 37-44
The highest resolution images of Comet 19P/Borrelly show many dark features which, upon casual inspection, appear to be low albedo markings, but which may also be shadows or other photometric variations caused by a depression in the local topography. In order to distinguish between these two possible interpretations we conducted...
Recommendations for the use of mist nets for inventory and monitoring of bird populations
C. John Ralph, Erica H. Dunn, Will J. Peach, Colleen M. Handel
C. John Ralph, Erica H. Dunn, editor(s)
2004, Book chapter, Monitoring bird populations using mist nets (Studies in Avian Biology no. 29)
We provide recommendations on the best practices for mist netting for the purposes of monitoring population parameters such as abundance and demography. Studies should be carefully thought out before nets are set up, to ensure that sampling design and estimated sample size will allow study objectives to be met. Station...
The Evolving Landscape of the Columbia River Gorge: Lewis and Clark and Cataclysms on the Columbia
James E. O’Connor
2004, Oregon Historical Society Quarterly (105) 390-321
Travelers reacting Lewis and Clark's journey to the Pacific over the past two hundred years have witnessed tremendous change to the Columbia River Gorge and its primary feature, the Columbia River. Dams, reservoirs, timer harvest, altered fisheries, transportation infrastructure, and growth and shrinkage of communities have transformed the river and...
Atlas of depth-duration frequency of precipitation annual maxima for Texas
William H. Asquith, Meghan C. Roussel
2004, Texas Department of Transportation Project Summary Report 5–1301–01–S
The objective of this Texas Department of Transportation (TxDOT) and U.S. Geological Survey (USGS) cooperatively funded project was to develop a simple-to-use atlas of precipitation depths in Texas for selected storm durations and frequencies on the basis of the research results and unpublished digital archives of Asquith (1998). The selected...
Late Quaternary stratigraphy and geochronology of the western Killpecker Dunes, Wyoming, USA
J. H. Mayer, S. A. Mahan
2004, Quaternary Research (61) 72-84
New stratigraphic and geochronologic data from the Killpecker Dunes in southwestern Wyoming facilitate a more precise understanding of the dune field's history. Prior investigations suggested that evidence for late Pleistocene eolian activity in the dune field was lacking. However, luminescence ages from eolian sand of ???15,000 yr, as well as...
A walk through the hydroclimate network in Yosemite National Park: River chemistry
Dave Peterson, Richard Smith, Stephen Hager
2004, Sierra Nature Notes (4) 1-16
Visitors to Yosemite National Park (YNP) are fully aware of the weather, snowmelt, waterfalls (Photo 1), and river discharge and river and lake water temperature. They are not, however, thinking about river chemistry because you can’t see, hear, or feel it. So a river chemistry article in Nature Notes needs...
Air temperature and snowmelt discharge characteristics, Merced River at Happy Isles, Yosemite National Park, Central Sierra Nevada
D. Peterson, R. Smith, S. Hager, D. Cayan, M. Dettinger
2004, Conference Paper, Proceedings of the Twentieth Annual Pacific Climate Workshop
No abstract available....
Fort Collins Science Center: Ecosystem Dynamics
Zack Bowen
2004, Fact Sheet 2004-3147
Many challenging natural resource management issues require consideration of a web of interactions among ecosystem components. The spatial and temporal complexity of these ecosystem problems demands an interdisciplinary approach integrating biotic and abiotic processes. The goals of the Ecosystem Dynamics Branch are to provide sound science to aid federal resource...
Collared peccary range expansion in northwestern New Mexico
S. Albert, C.A. Ramotnik, C.G. Schmitt
2004, Southwestern Naturalist (49) 524-528
We report new records of collared peccary (Pecari tajacu) in New Mexico that document its continued northward expansion in the United States, in general, and in northwestern New Mexico, in particular. These records might represent the northernmost extent of its range in the Southwest. Collared peccaries in New Mexico typically...
Sensitivity to acidification of subalpine ponds and lakes in north-western Colorado
K. Campbell, E. Muths, J.T. Turk, P.S. Corn
2004, Hydrological Processes (18) 2817-2834
Although acidifying deposition in western North America is lower than in many parts of the world, many high-elevation ecosystems there are extremely sensitive to acidification. Previous studies determined that the Mount Zirkel Wilderness Area (MZWA) has the most acidic snowpack and aquatic ecosystems that are among the most sensitive in...
Sustaining healthy freshwater ecosystems
Jill Baron, N.L. Poff
2004, Water Resources Update (127) 52-58
Functionally intact and biologically complex freshwater ecosystems provide many economically valuable commodities and services to society. The services supplied by freshwater ecosystems include flood control, transportation, recreation, purification of human and industrial wastes, habitat for plants and animals, and production of fish and other foods and marketable goods. These human...
The travel cost method and the economic value of leisure time
Aaron J. Douglas, Richard L. Johnson
2004, International Journal of Tourism Research (6) 365-374
Recent estimates of high values for tourist related recreation USA amenity values indicate that allocation of basic water and terrestrial resources to recreation activities should be given precedence over conventional market oriented activities that often degrade or even extirpate the resource. We discuss at length the travel cost method (TCM),...
Effect of temporal resolution on the accuracy of ADCP measurements
J. A. Gonzalez-Castro, K. Oberg, James J. Duncker
2004, Conference Paper, Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
The application of acoustic Doppler current profilers (ADCP's) in river flow measurements is promoting a great deal of progress in hydrometry. ADCP's not only require shorter times to collect data than traditional current meters, but also allow streamflow measurements at sites where the use of conventional meters is either very...
Predicting the thermal effects of dam removal on the Klamath River
J.M. Bartholow, S.G. Campbell, M. Flug
2004, Environmental Management (34) 856-874
The Klamath River once supported large runs of anadromous salmonids. Water temperature associated with multiple mainstem hydropower facilities might be one of many factors responsible for depressing Klamath salmon stocks. We combined a water quantity model and a water quality model to predict how removing the series of dams below...
