Publications
Filter Total Items: 2085
Using resampling to assess reliability of audio-visual survey strategies for marbled murrelets at inland forest sites Using resampling to assess reliability of audio-visual survey strategies for marbled murrelets at inland forest sites
Marbled Murrelets (Brachyramphus marmoratus) are threatened seabirds that nest in coastal old-growth coniferous forests throughout much of their breeding range. Currently, observer-based audio-visual surveys are conducted at inland forest sites during the breeding season primarily to determine nesting distribution and breeding status and are being used to estimate temporal or spatial...
Authors
Patrick G.R. Jodice, S.L. Garman, Michael W. Collopy
Fall migration routes, timing, and wintering sites of North American ospreys as determined by satellite telemetry Fall migration routes, timing, and wintering sites of North American ospreys as determined by satellite telemetry
Satellite telemetry was used to determine fall migratory movements of Ospreys (Pandion haliaetus) breeding in the United States. Study areas were established along the lower Columbia River between Oregon and Washington; in north-central Minnesota; on Shelter Island, New York; and in southern New Jersey. Seventy-four adults (25 males, 49 females) were tracked from 1995 through 1999...
Authors
M.S. Martell, Charles J. Henny, P. Nye, Matthew J. Solensky
[Book Review] Diseases of Wild Waterfowl, by Gary A. Wobeser [Book Review] Diseases of Wild Waterfowl, by Gary A. Wobeser
Review of: Diseases of Wild Waterfowl. Gary A. Wobeser. 2nd Edition, illustrated. Springer, 1997. ISBN: 0306455900. 324 p.
Authors
Charles van Riper
Breeding bird response to juniper woodland expansion Breeding bird response to juniper woodland expansion
In recent times, pinyon (Pinus spp.)-juniper (Juniperus spp.) woodlands have expanded into large portions of the Southwest historically occupied by grassland vegetation. From 1997-1998, we studied responses of breeding birds to one-seed juniper (J. monosperma) woodland expansion at 2 grassland study areas in northern Arizona. We sampled breeding birds in 3 successional stages along a...
Authors
Steven S. Rosenstock, Charles van Riper
Planned flooding and Colorado River riparian trade-offs downstream from Glen Canyon Dam, Arizona Planned flooding and Colorado River riparian trade-offs downstream from Glen Canyon Dam, Arizona
Regulated river restoration through planned flooding involves trade-offs between aquatic and terrestrial components, between relict pre-dam and novel post-dam resources and processes, and between management of individual resources and ecosystem characteristics. We review the terrestrial (wetland and riparian) impacts of a 1274 m3/s test flood conducted by the U.S. Bureau of Reclamation...
Authors
Lawrence E. Stevens, T.J. Ayers, J.B. Bennett, K. Christensen, M.J.C. Kearsley, V.J. Meretsky, A. M. Phillips, R.A. Parnell, J. Spence, M. K. Sogge, Abraham E. Springer, D.L. Wegner
A targeted mist-net capture technique for the willow flycatcher A targeted mist-net capture technique for the willow flycatcher
No abstract available.
Authors
Mark K. Sogge, J.C. Owen, Eben H. Paxton, S.M. Langridge
Ploidy race distributions since the Last Glacial Maximum in the North American desert shrub, Larrea tridentata Ploidy race distributions since the Last Glacial Maximum in the North American desert shrub, Larrea tridentata
A classic biogeographic pattern is the alignment of diploid, tetraploid and hexaploid races of creosote bush (Larrea tridentata) across the Chihuahuan, Sonoran and Mohave Deserts of western North America. We used statistically robust differences in guard cell size of modern plants and fossil leaves from packrat middens to map current and past distributions of these ploidy races since the...
Authors
Kimberly L. Hunter, Julio L. Betancourt, Brett R. Riddle, Thomas R. Van Devender, K.L. Cole, W. G. Spaulding
Field soil aggregate stability kit for soil quality and rangeland health evaluations Field soil aggregate stability kit for soil quality and rangeland health evaluations
Soil aggregate stability is widely recognized as a key indicator of soil quality and rangeland health. However, few standard methods exist for quantifying soil stability in the field. A stability kit is described which can be inexpensively and easily assembled with minimal tools. It permits up to 18 samples to be evaluated in less than 10 min and eliminates the need for transportation...
Authors
J. E. Herrick, W. G. Whitford, A. G. de Soyza, J. W. Van Zee, K. M. Havstad, C. A. Seybold, M. Walton
Clutch sizes and nests of tailed frogs from the Olympic Peninsula, Washington Clutch sizes and nests of tailed frogs from the Olympic Peninsula, Washington
In the summers 1995-1998, we sampled 168 streams (1,714 in of randomly selected 1-m bands) to determine distribution and abundance of stream amphibians in Olympic National Park, Washington. We found six nests (two in one stream) of the tailed frog, compared to only two nests with clutch sizes reported earlier for coastal regions. This represents only one nest per 286 in searched and one...
Authors
R. Bruce Bury, P. Loafman, D. Rofkar, K. Mike
Salmonberry and salal annual aerial stem production: The maintenance of shrub cover in forest stands Salmonberry and salal annual aerial stem production: The maintenance of shrub cover in forest stands
Annual sprouting of aerial stems and ramets enables populations of salmonberry (Rubus spectabilis Pursh), salal (Gaultheria shallon Pursh), and probably other forest shrubs to maintain dense covers (>20 000 stems/ha). We studied annual stem production of salmonberry on cut (all stems cut within 15 cm of the ground) and uncut (stems were not treated) plots for 8 years and salal for 5...
Authors
J. C. Tappeiner, J. Zasada, D. Huffman, L. Ganio
Patterns of plant invasions: A case example in native species hotspots and rare habitats Patterns of plant invasions: A case example in native species hotspots and rare habitats
Land managers require landscape-scale information on where exotic plant species have successfully established, to better guide research, control, and restoration efforts. We evaluated the vulnerability of various habitats to invasion by exotic plant species in a 100,000 ha area in the southeast corner of Grand Staircase-Escalante National Monument, Utah. For the 97 0.1-ha plots in 11...
Authors
T.J. Stohlgren, Yuka Otsuki, C.A. Villa, M. Lee, J. Belnap
Myrmecophagy by Yellowstone grizzly bears Myrmecophagy by Yellowstone grizzly bears
I used data collected during a study of radio-marked grizzly bears (Ursus arctos horribilis) in the Yellowstone region from 1977 to 1992 to investigate myrmecophagy by this population. Although generally not an important source of energy for the bears (averaging
Authors
David J. Mattson