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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: 2437

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January 1, 2002

Instream flows for riverine resource stewardship Instream flows for riverine resource stewardship

No abstract available.

Authors

T. Annear, I. Chisholm, H. Beecher, A. Locke, P. Aarrestad, N. Burkardt, C. Coomer, C. Estes, J. Hunt, R. Jacobson, G. Jobsis, J. Kauffman, J. Marshall, K. Mayes, C. Stalnaker, R. Wentworth

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Visitor reponse to demonstration fees at National Wildlife Refuges Visitor reponse to demonstration fees at National Wildlife Refuges

In response to a request from the United States Fish and Wildlife Service, we examined the likelihood of visitors changing their plans for future visits to National Wildlife Refuges (NWR) because of changes in entrance or use fees. We obtained data for this study from 3,173 respondents from 14 NWRs between 1998 and 2000. Overall, only 8% of all respondents reported potential displacement...

Authors

J. G. Taylor, J.J. Vaske, L.B. Shelby, M.P. Donnelly, Cassandra M. Browne

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

USFWS demonstration fees USFWS demonstration fees

This study examined National Wildlife Refuge (NWR) visitors' reactions to changes in fees implemented as part of the fee demonstration program. Visitors' evaluations of the fees paid were examined in addition to their beliefs about fees and the fee demonstration program, and the impact of fees paid on their intention to return. All results were analyzed relative to socio-demographic

Authors

Jonathan Taylor, Jerry Vaske, Maureen Donnelly, Lori Shelby

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

The influence of sylvatic plague on North American wildlife at the landscape level, with special emphasis on black-footed ferret and prairie dog conservation The influence of sylvatic plague on North American wildlife at the landscape level, with special emphasis on black-footed ferret and prairie dog conservation

No abstract available.

Authors

M.F. Antolin, P. Gober, Bob Luce, D. E. Biggins, W.E. van Pelt, D.B. Seery, M. Lockhart, M. Ball

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Public attitudes and knowledge of the black-tailed prairie dog: A common and controversial species Public attitudes and knowledge of the black-tailed prairie dog: A common and controversial species

No abstract available.

Authors

D. Lybecker, B. L. Lamb, P.D. Ponds

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Evaluation of a habitat suitability index model Evaluation of a habitat suitability index model

We assisted with development of a model for maternity habitat of the Indiana bat (Myotis soda/is), for use in conducting assessments of projects potentially impacting this endangered species. We started with an existing model, modified that model in a workshop, and evaluated the revised model, using data previously collected by others. Our analyses showed that higher indices of habitat...

Authors

A.H. Farmer, B.S. Cade, D.F. Stauffer

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Phylogeography and history of giant Galápagos tortoises Phylogeography and history of giant Galápagos tortoises

We examined the phylogeography and history of giant Galápagos tortoise populations based on mitochondrial DNA sequence data from 161 individuals from 21 sampling sites representing the 11 currently recognized extant taxa. Molecular clock and geological considerations indicate a founding of the monophyletic Galápagos lineage around 2–3 million years ago, which would allow for all the

Authors

A. Caccone, G. Gentile, J.P. Gibbs, T. H. Fritts, H.L. Snell, J. Betts, J.R. Powell

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Razorback sucker movements and habitat use in the San Juan River inflow, Lake Powell, Utah, 1995-1997 Razorback sucker movements and habitat use in the San Juan River inflow, Lake Powell, Utah, 1995-1997

Seventeen subadult, hatchery-reared razorback suckers (Xyrauchen texanus; (x̄ = 456 mm total length) were implanted with sonic transmitters and tracked for 23 months in the lower 89.6 km of the San Juan River (San Juan arm of Lake Powell, Utah). Fish were released at 2 sites, and 9 made extensive up-and downstream movements (x = 47.8 km; contact was lost with 4, and 4 others presumably...

Authors

C.A. Karp, G. Mueller

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002

Assessing vulnerability to invasion by nonnative plant species at multiple spatial scales Assessing vulnerability to invasion by nonnative plant species at multiple spatial scales

Basic information on where nonnative plant species have successfully invaded is lacking. We assessed the vulnerability of 22 vegetation types (25 sets of four plots in nine study areas) to nonnative plant invasions in the north–central United States. In general, habitats with high native species richness were more heavily invaded than species-poor habitats, low-elevation areas were more...

Authors

T.J. Stohlgren, G.W. Chong, L. D. Schell, K.A. Rimar, Yuka Otsuki, M. Lee, M. A. Kalkhan, C.A. Villa

Ecosystems Mission Area, Fort Collins Science Center

January 1, 2002