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184617 results.

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Page 2438, results 60926 - 60950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Temporal, spatial, and environmental influences on the demographics of grizzly bears in the Greater Yellowstone Ecosystem
Charles C. Schwartz, Mark A. Haroldson, Gary C. White, Richard B. Harris, Steve Cherry, Kim A. Keating, Dave Moody, Christopher Servheen
2006, Book
During the past 2 decades, the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem (GYE) has increased in numbers and expanded in range. Understanding temporal, environmental, and spatial variables responsible for this change is useful in evaluating what likely influenced grizzly bear demographics in the GYE and where...
Estimating Potential Effects of Hypothetical Oil Spills on Polar Bears
Steven C. Amstrup, George M. Durner, T. L. McDonald, W.R. Johnson
2006, Report
Much is known about the transport and fate of oil spilled into the sea and its toxicity to exposed wildlife. Previously, however, there has been no way to quantify the probability that wildlife dispersed over the seascape would be exposed to spilled oil. Polar bears, the apical predator of the...
Fire ecology of the Sierra Nevada
J. W. van Wagtendonk
George Wuerthner, editor(s)
2006, Book chapter, Fire - Restoring fire to the land - Fire ecology and forest health
No abstract available....
Attitudes and perceptions about prairie dogs
Berton Lee Lamb, Richard P. Reading, William F. Andelt
John L. Hoogland, editor(s)
2006, Book chapter, Conservation of the black-tailed prairie dog: Saving North America's western grasslands
We sometimes get the impression that all ranchers and farmers of the western United States hate prairie dogs, and that people everywhere else love them. This generality contains elements of truth, but better documentation of attitudes and perceptions is paramount for good conservation. In this chapter we examine attitudes and...
Terrapene carolina. Eastern Box Turtle
T.G. Farrell, C.K. Dodd Jr., P.G. May
Peter A. Meylan, editor(s)
2006, Book chapter, Chelonian Research Monographs 3. Biology and Conservation of Florida's Turtles
Abstract not supplied at this time...
Balancing predation and egg harvest in a colonial seabird: A simulation model
Stephani Zador, John F. Piatt, A. E. Punt
2006, Ecological Modelling (195) 318-326
We developed an individual-based model to study the effects of different regimes of harvesting eggs and natural predation on reproductive success in a colony of the glaucous-winged gull (Larus glaucescens) in Glacier Bay National Park, Alaska. The model incorporates the sequence of egg laying, relaying, and incubation to hatching for...
The role of biological uptake in iron and manganese cycling in Lake Baikal
L.Z. Granina, E. Callender
2006, Conference Paper, Hydrobiologia
The role of biological uptake in the internal cycling of Fe and Mn in Lake Baikal was quantified. Biological uptake, sedimentation consisting of the biogenic and lithogenic fluxes, and remineralization have been evaluated. The results of calculations show that about 5-10% of Fe and Mn accumulated in the lake are...
Evolution of plant adaptations
Jon E. Keeley
J. Fites-Kaufman, N. Sugihari, J. van Wangtendonk, editor(s)
2006, Book chapter, Fire Ecology of California Ecosystems.
No abstract available at this time...
Population momentum across vertebrate life histories
D. N. Koons, J.B. Grand, J.M. Arnold
2006, Ecological Modelling (197) 418-430
Population abundance is critically important in conservation, management, and demographic theory. Thus, to better understand how perturbations to the life history affect long-term population size, we examined population momentum for four vertebrate classes with different life history strategies. In a series of demographic experiments we show that population momentum generally...
High REE and Y concentrations in Co-Cu-Au ores of the Blackbird district, Idaho
J. F. Slack
2006, Economic Geology (101) 275-280
Analysis of 11 samples of strata-bound Co-Cu-Au ore from the Blackbird district in Idaho shows previously unknown high concentrations of rare earth elements (REE) and Y, averaging 0.53 wt percent ???REE + Y oxides. Scanning electron microscopy indicates REE and Y residence in monazite, xenotime, and allanite that form complex...
Altitude and configuration of the potentiometric surface in the Lower White Clay Creek and Upper Christina River Basins including portions of Franklin, London Britain, New Garden, and New London Townships, Chester County, Pennsylvania, June through September 2005
Lindsay B. Hale
2006, Scientific Investigations Map 2939
Since 1984, the U.S. Geological Survey (USGS) has been mapping the altitude and configuration of the potentiometric surface in Chester County as part of an ongoing cooperative program to measure and describe the water resources of the county.  Areas where the potentiometric surface has been mapped are shown on figure...
Peak discharge of a Pleistocene lava-dam outburst flood in Grand Canyon, Arizona, USA
C.R. Fenton, R. H. Webb, T.E. Cerling
2006, Quaternary Research (65) 324-335
The failure of a lava dam 165,000 yr ago produced the largest known flood on the Colorado River in Grand Canyon. The Hyaloclastite Dam was up to 366 m high, and geochemical evidence linked this structure to outburst-flood deposits that occurred for 32 km downstream. Using the Hyaloclastite outburst-flood deposits...