Publications
FORT scientists have produced more than 2000 peer reviewed publications that are registered in the USGS Publications Warehouse, along with many others prior to their work at the USGS or in conjunction with other government agencies.
Filter Total Items: 2437
Ecosystem responses to nitrogen deposition in the Colorado Front Range Ecosystem responses to nitrogen deposition in the Colorado Front Range
We asked whether 3–5 kg N y−1 atmospheric N deposition was sufficient to have influenced natural, otherwise undisturbed, terrestrial and aquatic ecosystems of the Colorado Front Range by comparing ecosystem processes and properties east and west of the Continental Divide. The eastern side receives elevated N deposition from urban, agricultural, and industrial sources, compared with 1–2...
Authors
Jill Baron, H.M. Rueth, A.M. Wolfe, K. R. Nydick, E.J. Allstott, J.T. Minear, B. Moraska
Stream chemistry modeling of two watersheds in the Front Range, Colorado Stream chemistry modeling of two watersheds in the Front Range, Colorado
We investigated the hydrologic, geochemical, and biogeochemical controls on stream chemical composition on the Green Lakes Valley and Andrews Creek watersheds using the alpine hydrochemical model (AHM). Both sites had comparable data sets from 1994 and 1996, including high‐resolution spatial data and high‐frequency time series of hydrology, geochemistry, and meteorology. The model of...
Authors
Thomas Meixner, Roger C. Bales, Mark W. Williams, Donald H. Campbell, Jill S. Baron
The role of vegetation in cowbird parasitism of yellow warblers The role of vegetation in cowbird parasitism of yellow warblers
No abstract available.
Authors
W.H. Howe, F.L. Knopf
Investigation of nitrogen transformations in a southern California constructed wastewater treatment wetland Investigation of nitrogen transformations in a southern California constructed wastewater treatment wetland
A 9.9-ha combined habitat and wastewater treatment demonstration wetland was constructed and planted in the summer of 1994, at Eastern Municipal Water District’s (EMWD) Hemet/San Jacinto Regional Water Reclamation Facility (RWRF) in southern California. From January 1996 through September 1997, the marsh–pond–marsh wetland system was operated to polish an average of 3785 m3 d−1 (1×106...
Authors
J.J. Sartoris, J.S. Thullen, L. B. Barber, D.E. Salas
Comparison of one and two-dimensional open channel flow models for a small habitat stream Comparison of one and two-dimensional open channel flow models for a small habitat stream
No abstract available.
Authors
T.J. Waddle, P. Steffler, A. Ghanem, C. Katopodis, A. Locke
Elk, beaver, and the persistence of willows in national parks: Response to Keigley (1999) Elk, beaver, and the persistence of willows in national parks: Response to Keigley (1999)
No abstract available.
Authors
F. J. Singer, L. C. Zeigenfuss, R.G. Cates, D.T. Barnett
Distribution, movements, and habitat use of razorback sucker (Xyrauchen texanus) in a lower Colorado River Reservoir, Arizona-Nevada Distribution, movements, and habitat use of razorback sucker (Xyrauchen texanus) in a lower Colorado River Reservoir, Arizona-Nevada
Distribution, movements, and habitat use of 10 wild adult razorback suckers (Xyrauchen texanus) were examined in Lake Mohave, Arizona-Nevada, from November 1994 through July 1997. Movement rates (0.00-17.35 km d⁻¹) and ranges (x̄ = 39 km) were similar to those for riverine populations. All study fish returned to spawning sites used in previous years, but they also visited other spawning...
Authors
G.A. Mueller, P.C. Marsh, G. Knowles, T. Wolters
Population growth, fecundity, and survivorship in recovering populations of bighorn sheep Population growth, fecundity, and survivorship in recovering populations of bighorn sheep
The single greatest obstacle to the restoration of large, healthy, populations of bighorn sheep (Ovis canadensis) in the western United States is epizootic outbreaks of bronchopneumonia that may kill 20–100% of the animals in populations. Although the species is capable of rapid initial growth rates following restoration into new habitat (λ = 1.23–1.30 have been observed), these rates of...
Authors
F. J. Singer, E. Williams, M.W. Miller, L. C. Zeigenfuss
Correlates to colonizations of new patches by translocated populations of bighorn sheep Correlates to colonizations of new patches by translocated populations of bighorn sheep
By 1950, bighorn sheep were extirpated from large areas of their range. Most extant populations of bighorn sheep (Ovis canadensis) in the Intermountain West consist of
Authors
F. J. Singer, M.E. Moses, S. Bellew, W. Sloan
Multicriteria decision analysis applied to Glen Canyon Dam Multicriteria decision analysis applied to Glen Canyon Dam
Conflicts in water resources exist because river-reservoir systems are managed to optimize traditional benefits (e.g., hydropower and flood control), which are historically quantified in economic terms, whereas natural and environmental resources, including in-stream and riparian resources, are more difficult or impossible to quantify in economic terms. Multicriteria decision analysis...
Authors
M. Flug, H.L.H. Seitz, J.F. Scott
Using multi-scale sampling and spatial cross-correlation to investigate patterns of plant species richness Using multi-scale sampling and spatial cross-correlation to investigate patterns of plant species richness
Land managers need better techniques to assess exoticplant invasions. We used the cross-correlationstatistic, IYZ, to test for the presence ofspatial cross-correlation between pair-wisecombinations of soil characteristics, topographicvariables, plant species richness, and cover ofvascular plants in a 754 ha study site in RockyMountain National Park, Colorado, U.S.A. Using 25 largeplots...
Authors
M. A. Kalkhan, T.J. Stohlgren
An approach for assessment of water quality using semipermeable membrane devices (SPMDs) and bioindicator tests An approach for assessment of water quality using semipermeable membrane devices (SPMDs) and bioindicator tests
As an integral part of our continued development of water quality assessment approaches, we combined integrative sampling, instrumental analysis of widely occurring anthropogenic contaminants, and the application of a suite of bioindicator tests as a specific part of a broader survey of ecological conditions, species diversity, and habitat quality in the Santa Cruz River in Arizona, USA...
Authors
J. D. Petty, S.B. Jones, J.N. Huckins, W.L. Cranor, J.T. Parris, T.B. McTague, T.P. Boyle