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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: 2395

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January 1, 2000

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

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

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

Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Fort Collins Science Center

January 1, 2000

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

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

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

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

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

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

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

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Paradise confounded: the status of Alaska's instream flow program. Review of "Annual Summary of Instream Flow Reservations and Protection in Alaska" by Christopher E. Estes Paradise confounded: the status of Alaska's instream flow program. Review of "Annual Summary of Instream Flow Reservations and Protection in Alaska" by Christopher E. Estes

No abstract available.

Authors

Nina Burkardt

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Estimating cumulative effects of clearcutting on stream temperatures Estimating cumulative effects of clearcutting on stream temperatures

The Stream Segment Temperature Model was used to estimate cumulative effects of large-scale timber harvest on stream temperature. Literature values were used to create parameters for the model for two hypothetical situations, one forested and the other extensively clearcut. Results compared favorably with field studies of extensive forest canopy removal. The model provided insight into...

Authors

J.M. Bartholow

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Application of the new keystone-species concept to prairie dogs: How well does it work? Application of the new keystone-species concept to prairie dogs: How well does it work?

It has been suggested that the keystone-species concept should be dropped from ecology and conservation, primarily because the concept is poorly defined. This prompted Power et al. (1996) to refine the definition: keystone species have large effects on community structure or ecosystem function (i.e., high overall importance), and this effect should be large relative to abundance (i.e...

Authors

N.B. Kotliar

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Amphibian declines: Review of some current hypotheses Amphibian declines: Review of some current hypotheses

No abstract available.

Authors

P.S. Corn

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Willow Flycatcher (Empidonax traillii) Willow Flycatcher (Empidonax traillii)

No abstract available.

Authors

J.A. Sedgwick

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2000

Potential effects of climate change on surface-water quality in North America Potential effects of climate change on surface-water quality in North America

Data from long-term ecosystem monitoring and research stations in North America and results of simulations made with interpretive models indicate that changes in climate (precipitation and temperature) can have a significant effect on the quality of surface waters. Changes in water quality during storms, snowmelt, and periods of elevated air temperature or drought can cause conditions...

Authors

Peter S. Murdoch, Jill Baron, T. L. Miller

Ecosystems Mission Area, Fort Collins Science Center