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Patterns Of Big Sagebrush Plant Community Composition And Stand Structure In The Western United States Cvictoria E Pennington John B Bradford Kyle A Palmquist Rachel R Renne And William K Lauenroth
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Book Synopsis Patterns of Big Sagebrush Plant Community Composition and Stand Structure in the Western United States /cVictoria E. Pennington, John B. Bradford, Kyle A. Palmquist, Rachel R. Renne, and William K Lauenroth by : Victoria E. Pennington
Download or read book Patterns of Big Sagebrush Plant Community Composition and Stand Structure in the Western United States /cVictoria E. Pennington, John B. Bradford, Kyle A. Palmquist, Rachel R. Renne, and William K Lauenroth written by Victoria E. Pennington and published by . This book was released on 2019 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Big sagebrush (Artemisia tridentata Nutt.) plant communities are found in western North America and comprise a mix of shrubs, forbs, and grasses. Climate, topography, and soil water availability are important factors that shape big sagebrush stand structure and plant community composition; however, most studies have focused on understanding these relationships at sites in a small portion of the big sagebrush region. Our goal was to characterize detailed stand structure and plant composition patterns and identify environmental variables related to those patterns by sampling 15 sites distributed across the western United States. In each site, we characterized stand structure at the individual shrub level and at the site level. We quantified size distributions and assessed relationships among canopy volume, age, and height. We also characterized functional type cover and species composition and related those to climatic, topographic, and edaphic variables. Mean big sagebrush age ranged from 21 (±8) to 57 (±22) yr at individual sites, mean height ranged from 0.23 (±0.12) to 0.67 (±0.23) m, and mean canopy volume ranged from 0.03 (±0.04) to 0.62 (±0.51) m3. Bare ground and litter contributed the most cover (mean = 64%), followed by big sagebrush (mean = 39% of vascular plant cover). There was a negative relationship between big sagebrush cover and grass and forb cover. Species composition was related to both climate and elevation, likely because these variables influence water availability. Although our study was limited to 15 field sites, our detailed descriptions of widely distributed sites provide insight into the magnitude of variability in big sagebrush plant community structure.
Book Synopsis The Leading Edge of the Big Sagebrush Distribution by : Trace E. Martyn
Download or read book The Leading Edge of the Big Sagebrush Distribution written by Trace E. Martyn and published by . This book was released on 2015 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Big sagebrush (Artemisia tridentata) is endemic to semiarid western North America. Big sagebrush plant communities are important for recreating and grazing but are also essential habitat for many plant and animal species including the greater sage-grouse ( Centrocercus urophasianus). Recent predictions suggest that climatic suitability for big sagebrush under future climate change will increase along the northeastern edge of the existing big sagebrush distribution or the predicted leading edge. The main objective of my research was to characterize big sagebrush plant communities adjacent to the leading edge of the distribution using both field and modeling studies. I used a field study to characterize the established plant community and the seed bank in plant communities adjacent to the leading edge. I quantified the plant community composition, soil texture, and cover as well as the seed bank for 3 sites in northeastern Montana, USA. I also used a paired soil water and individual plant model (STEPWAT) to assess big sagebrush plant community response to climate change. I ran simulations under current and future climate conditions for mid and late-century predictions using 10 Global Circulation Models (GCMs) for 10 sites adjacent to the predicted leading edge of the big sagebrush distribution. In big sagebrush plant communities adjacent to the leading edge, there was less than 30% similarity in the relative abundance of species between the established plant community and the seed bank. This difference was primarily driven by an overrepresentation of annual forbs and an underrepresentation of big sagebrush in the seed bank compared to the established plant community. Simulations of big sagebrush plant communities adjacent to the leading edge showed no substantial change in plant community functional type composition under future climate for mid and late-century time periods. Sagebrush and total biomass decreased in the future but, depending on the scenario and GCM, there was a wide range of potential biomass values for all functional groups varying in direction of change and amplitude. These results support future predictions of no change in climatic suitability for big sagebrush plant communities adjacent to the leading edge. Current big sagebrush plant communities adjacent to the leading edge appear to be able to respond well to climate change. These communities could support big sagebrush range expansion into the leading edge given the availability of seeds. My work will help inform the management of these communities under future climate change.
Book Synopsis Big Sagebrush by : Bruce Leigh Welch
Download or read book Big Sagebrush written by Bruce Leigh Welch and published by . This book was released on 2005 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pioneers traveling along the Oregon Trail from western Nebraska, through Wyoming and southern Idaho and into eastern Oregon, referred to their travel as an 800 mile journey through a sea of sagebrush, mainly big sagebrush ( Artemisia tridentata). Today approximately 50 percent of the sagebrush sea has given way to agriculture, cities and towns, and other human developments. What remains is further fragmented by range management practices, creeping expansion of woodlands, alien weed species, and the historic view that big sagebrush is a worthless plant. Two ideas are promoted in this report: (1) big sagebrush is a nursing mother to a host of organisms that range from microscopic fungi to large mammals, and (2) many range management practices applied to big sagebrush ecosystems are not science based.
Book Synopsis Big Sagebrush by : Bruce Leigh Welch
Download or read book Big Sagebrush written by Bruce Leigh Welch and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climate Change in Wildlands by : Andrew J Hansen
Download or read book Climate Change in Wildlands written by Andrew J Hansen and published by Island Press. This book was released on 2016-06-07 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists have been warning for years that human activity is heating up the planet and climate change is under way. We are only just beginning to acknowledge the serious effects this will have on all life on Earth. The federal government is crafting broad-scale strategies to protect wildland ecosystems from the worst effects of climate change. One of the greatest challenges is to get the latest science into the hands of resource managers entrusted with vulnerable wildland ecosystems. This book examines climate and land-use changes in montane environments, assesses the vulnerability of species and ecosystems to these changes, and provides resource managers with collaborative management approaches to mitigate expected impacts. Climate Change in Wildlands proposes a new kind of collaboration between scientists and managers--a science-derived framework and common-sense approaches for keeping parks and protected areas healthy on a rapidly changing planet.
Book Synopsis Environment, Health, and Safety by : Lari A. Bishop
Download or read book Environment, Health, and Safety written by Lari A. Bishop and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hallelujah Trombone! by : Paul E. Bierley
Download or read book Hallelujah Trombone! written by Paul E. Bierley and published by Grupo Editorial Norma. This book was released on 2003 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
