Publications
Filter Total Items: 1971
Terrestrial and stream amphibians across clearcut-forest interfaces in the Siskiyou Mountains, Oregon
Timber harvest in the Pacific Northwest has resulted in a highly fragmented landscape. but there is no information on responses of amphibians to forest edges for this region. We investigated abundance of terrestrial and stream-dwelling amphibians on the interface of recent clearcuts and mature forest in the Siskiyou Mountains, Oregon, in summer and fall of 1998. We assessed relative abundance of t
Authors
Roman Biek, L. Scott Mills, R. Bruce Bury
Growth of Usnea longissima across a variety of habitats in the Oregon Coast Range
No abstract available.
Authors
D. Keon, P.S. Muir
Comparison of soil bacterial communities in rhizospheres of three plant species and the interspaces in an arid grassland
Soil bacteria are important contributors to primary productivity and nutrient cycling in arid land ecosystems, and their populations may be greatly affected by changes in environmental conditions. In parallel studies, the composition of the total bacterial community and of members of the Acidobacterium division were assessed in arid grassland soils using terminal restriction fragment length polymo
Authors
Cheryl R. Kuske, Lawrence O. Ticknor, Mark E. Miller, John M. Dunbar, Jody A. Davis, Susan M. Barns, Jayne Belnap
Geology and natural history of the San Francisco Bay area: A field-trip guidebook
A National Association of Geoscience Teachers Far Western Section (NAGT-FWS) field conference is an ideal forum for learning about the geology and natural history of the San Francisco Bay area. We visit classic field sites, renew old friendships, and make new ones. This collection of papers includes field guides and road logs for all of the Bay-area trips held during the NAGT-FWS 2001 Fall Field C
Southwestern willow flycatchers recaptured at wintering sites in Costa Rica
An adult Southwestern Willow Flycatcher banded in summer 1998 at Ash Meadows National Wildlife Refuge, Nevada, was recaptured the following winter in Santa Cruz, Costa Rica, then relocated at Ash Meadows during the 1999 breeding season. Another Southwestern Willow Flycatcher banded in 1999 as a nestling at Roosevelt Lake, Arizona, was recaptured in January 2000 on its wintering grounds in Bolsen,
Authors
Thomas J. Koronkiewicz, Mark K. Sogge
Soil biota in an ungrazed grassland: Response to annual grass (Bromus tectorum) invasion
Bromus tectorum is an exotic annual grass that currently dominates many western U.S. semi-arid ecosystems, and the effects of this grass on ecosystems in general, and soil biota specifically, are unknown. Bromus recently invaded two ungrazed and unburned perennial bunchgrass communities in southeastern Utah. This study compared the soil food-web structure of the two native grassland associations (
Authors
Jayne Belnap, Susan L. Phillips
Effective population size and genetic structure of a Piute ground squirrel (Spermophilus mollis) population
Piute ground squirrels (Spermophilus mollis) are distributed continuously in habitat dominated by native shrubs and perennial grasses in the Snake River Birds of Prey National Conservation Area in Idaho, U.S.A. This habitat is being fragmented and replaced by exotic annual plants, changing it to a wildfire-dominated system that provides poor habitat for ground squirrels. To assess potential effect
Authors
Michael F. Antolin, Beatrice Van Horne, Michael D. Berger
A model for nematode locomotion in soil
Locomotion of nematodes in soil is important for both practical and theoretical reasons. We constructed a model for rate of locomotion. The first model component is a simple simulation of nematode movement among finite cells by both random and directed behaviours. Optimisation procedures were used to fit the simulation output to data from published experiments on movement along columns of soil or
Authors
H. William Hunt, Diana H. Wall, Nicole DeCrappeo, John S. Brenner
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
Whitebark pine, grizzly bears, and red squirrels
Appropriately enough, much of this book is devoted to discussing management challenges and techniques. However, the impetus for action—the desire to save whitebark pine (Pinus albicaulis) - necessarily arises from the extent to which we cherish it for its beauty and its connections with other things that we value. Whitebark pine is at the hub of a fascinating web of relationships. It is the stuff
Authors
David J. Mattson, Katherine C. Kendall, Daniel P. Reinhart
Effects of color bands on Semipalmated Sandpipers banded at hatch
Effects of color bands on adult birds have been investigated in many studies, but much less is known about the effects of bands on birds banded at hatch. We captured Semipalmated Sandpiper (Calidris pusilla) chicks at hatch on the Alaskan North Slope and attached 0–3 bands to them. The chicks were resighted and reweighed during the subsequent two weeks. The number of chicks banded varied from 18 t
Authors
Jonathan Bart, Daniel S. Battaglia, Nathan R. Senner