Publications
Below is a list of available NOROCK peer reviewed and published science. If you are in search of a specific publication and cannot find it below or through a search, please contact twojtowicz@usgs.gov.
Filter Total Items: 1211
Fire and aquatic ecosystems in forested biomes of North America
No abstract available.
Authors
R. E. Gresswell
Exotic plant species invade hot spots of native plant diversity
Some theories and experimental studies suggest that areas of low plant species richness may be invaded more easily than areas of high plant species richness. We gathered nested-scale vegetation data on plant species richness, foliar cover, and frequency from 200 1-m2 subplots (20 1000-m2 modified-Whittaker plots) in the Colorado Rockies (USA), and 160 1-m2 subplots (16 1000-m2 plots) in the Centra
Authors
T.J. Stohlgren, Dan Binkley, G.W. Chong, M. A. Kalkhan, L. D. Schell, K.A. Bull, Yuka Otsuki, G. Newman, Michael A. Bashkin, Y. Son
Conservation endocrinology: A noninvasive tool to understand relationships between carnivore colonization and ecological carrying capacity
Reproductive technology, especially the diagnosis of pregnancy by radioimmunoassay of fecal steroid metabolites, is an important component of captive propagation, but its role in our understanding of ecological interactions and in situ biological restoration has been more limited. Where large herbivores have been 'released' from predation by the extirpation of carnivores, controversy often exists
Authors
J. Berger, J.W. Testa, T. Roffe, S.L. Monfort
Estimating the effectiveness of further sampling inspecies inventories
Estimators of the number of additional species expected in the next Δn samples offer a potentially important tool for improving cost-effectiveness of species inventories but are largely untested. We used Monte Carlo methods to compare 11 such estimators, across a range of community structures and sampling regimes, and validated our results, where possible, using empirical data from vascular plant
Authors
Kim A. Keating, James F. Quinn, M.A. Ivie, L.L. Ivie
Assessing simulated ecosystem processes for climate variability research at Glacier National Park, USA
Glacier National Park served as a test site for ecosystem analyses that involved a suite of integrated models embedded within a geographic information system. The goal of the exercise was to provide managers with maps that could illustrate probable shifts in vegetation, net primary production (NPP), and hydrologic responses associated with two selected climatic scenarios. The climatic scenarios we
Authors
Joseph D. White, Steven W. Running, Peter E. Thornton, Robert E. Keane, Kevin C. Ryan, Daniel B. Fagre, Carl H. Key
Species repatriation: Red wolf
No abstract available.
Authors
C. F. Lucash, B. A. Crawford, J. D. Clark
Management of a large carnivore: Black bear
No abstract available.
Authors
Joseph D. Clark, Michael R. Pelton
A female black bear denning habitat model using a geographic information system
We used the Mahalanobis distance statistic and a raster geographic information system (GIS) to model potential black bear (Ursus americanus) denning habitat in the Ouachita Mountains of Arkansas. The Mahalanobis distance statistic was used to represent the standard squared distance between sample variates in the GIS database (forest cover type, elevation, slope, aspect, distance to streams, distan
Authors
J. D. Clark, S.G. Hayes, J.M. Pledger
Estimating the effectiveness of further sampling in species inventories
No abstract available.
Authors
K.A. Keating, J.F. Quinn, M.A. Ivie, L.L. Ivie
Estimating species richness: the Michaelis-Menten model revisited
No abstract available.
Authors
K.A. Keating, J.F. Quinn
Browse Evaluation by Analysis of Growth Form
Abstract has not been submitted
Authors
R.B. Keigley, M.R. Frisina