Download or read book Seed Germination and Establishment Ecology of Big Sagebrush and Rubber Rabbitbrush and Its Relationship to Artificial Seeding Success written by Stephen B. Monsen and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report INT written by and published by . This book was released on 1984 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings ecology and Management of Annual Rangelands written by Stephen B. Monsen and published by . This book was released on 1994 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual weeds continue to expand throughout the West eliminating many desirable species and plant communities. Wildfires are now common on lands infested with annual weeds, causing a loss of wildlife habitat and other natural resources. Measures can be used to reduce burning and restore native plant communities, but restoration is difficult and costly.
Download or read book Proceedings Symposium on Shrub Ecophysiology and Biotechnology Logan Utah June 30 July 2 1987 written by and published by . This book was released on 1989 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Symposium on Cheatgrass Invasion Shrub Die off and Other Aspects of Shrub Biology and Management written by and published by . This book was released on 1990 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1994 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Big Sagebrush Artemisia Tridentata in a Shifting Climate Context written by Martha M. Brabec and published by . This book was released on 2014 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The loss of big sagebrush (Artemisia tridentata) throughout the Great Basin Desert has motivated efforts to restore it because of fire and other disturbance effects on sagebrush-dependent wildlife and ecosystem function. Initial establishment is the first challenge to restoration, and appropriateness of seeds, climate, and weather variability are factors that may explain success or difficulties in big sagebrush restoration efforts. This project provided several ways of assessing climate responses of big sagebrush seedlings during the critical establishment phase post-fire. We evaluated eleven different seed sources of big sagebrush from all three subspecies, dissimilar climates-of-origin, and different ploidy levels to assess how subspecies, cytotype, and climate-of-origin affect initial establishment of sagebrush in a common garden study. We assessed ecophysiological-climate adaptation as it relates to seedling performance using a suite of dependent variables, including: survival, growth, water balance, photosynthesis, and threshold freezing responses. Results indicate the importance of minimum temperatures to seedling establishment, and reveal a gradient of physiological responses to freezing that inform big sagebrush adaptation and functional diversity. We then used in-situ experimental warming to isolate minimum temperatures, and test the effects of warming on seedling physiological performance for the three dominant subspecies of big sagebrush: A.t. tridentata, A.t. vaseyana, and A.t. wyomingensis. Experimental warming further supported our minimum temperature hypothesis, indicating that warming may alter seedling freezing response thereby affect growth and survival. In a third experiment, we evaluated how initial establishment of big sagebrush is influenced by management treatments on the herb layer, as post-fire rehabilitation frequently involves alterations of the plant community and soil. Results suggest that drill seeding combined with land management treatments that cause disturbance of the herb layer and soil surface may negatively affect sagebrush during the establishment phase. Also, seedlings from local seed or faster-growing populations had greater survival than seedlings from climates that differed from the experimental site. In summary, we provide experimental evidence for the importance of minimum temperatures and seed sources to big sagebrush ecology and management of sagebrush systems. As the climate warms, selection for population-specific freezing resistance mechanisms may alter subspecies distributions. Our data indicated that warming could increase relative abundance of A.t. tridentata compared to A.t. wyomingensis at our Birds of Prey National Conservation Areas study site on the lower Snake River plain. The underlying mechanism for this is greater stress overcome by changes in resource allocation from freezing protection to growth, as well as an extraction of deeper soil water resources in A.t. tridentata. Mortality of A.t. vaseyana appeared to relate to drought stress and greater vulnerability to minimum temperature exposure. Understanding differences in big sagebrush populations' ability to compete with different types and abundances of herbs as well as variation in freezing resistance mechanisms will contribute to appropriate seed selection for particular restoration sites. The implication is that selection of seed is critical for big sagebrush restoration success.."--Boise State University ScholarWorks.
Download or read book Proceedings Land Classifications Based on Vegetation written by and published by . This book was released on 1989 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book The Douglas fir ninebark Habitat Type in Central Idaho written by Robert Wilbur Steele and published by . This book was released on 1989 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emerging Seed Enhancements to Reduce the Risk of Sagebrush Post fire Seeding Failure written by Ryan Scott Call and published by . This book was released on 2018 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sagebrush (Artemisia spp.) steppe is undergoing rapid ecological change. The degradation of sagebrush steppe rangelands has resulted in the listing of more than 350 animals and plants as species of conservation concern. In addition, there has been a decrease in recreational values, reduced forage production, degraded water resources, and an increase in fire frequency. In the sagebrush steppe, success rates for seeding sagebrush after wildfire are notoriously low. Not only are sagebrush seeds hard to sow due to their small size and associated flower parts, but seedlings are exposed to numerous stresses that lowers their survivability. To improve sowing efficiency and reduce the associated stresses to seedling development we use seed enhancement technologies. In Chapter 1, we explain how a rotary seed coater can be used to agglomerate and apply enhancements to Wyoming big sagebrush (Artemisia tridentata spp. wyomingensis) seed. Using a mix of compost and clay we used a rotary seed coater to create small uniform agglomerates that allowed for enhancements to be applied to the seed. Our study demonstrated that agglomerates have no negative effects on seed germination and increased the overall flow of seed. In Chapter 2, we analyzed the addition of the plant hormone abscisic acid (ABA) in seed coatings. This hormone may delay seed germination and allow seedlings to avoid mortality due to over-winter freezing. We determined effects of different concentrations of ABA on total germination and timing of germination. Using a wet-thermal accumulation model, we estimated germination timing of seeds using soil temperature and water potential data for six different sites in the Great Basin. These models illustrate the variation in germination timing across the Great Basin. From our results we proposed the idea of using ABA to create a bet- hedging strategy in seed mixes to increase the probability that some seeds would germinate when conditions are favorable for seedling success.
Download or read book Proceedings of the Fourth Utah Shrub Ecology Workshop written by Kendall L. Johnson and published by . This book was released on 1987 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Plant Growth Regulators to Expand the Period of Sagebrush Seed Germination and Reduce the Risk of Restoration Failure written by Chelsea Elizabeth Keefer and published by . This book was released on 2019 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seed germination during unhospitable environmental conditions can be a major barrier to direct seeding efforts in dryland systems. In the sagebrush steppe, Artemisia tridentata Nutt. ssp. Wyomingensis and Artemisia arbuscula are important shrub species that are being used in restoration, but seeding success is highly sporadic due to inter-annual and intra-seasonal weather variability. Altering and expanding the period of germination, as a form of bet-hedging, may improve plant establishment. Our objective was to determine if we could expand the period of germination using plant growth regulators (PGRs) applied in a conglomerated seed coating treatment. In a laboratory study, the seed was either left untreated, conglomerated separately with two concentrations of a germination inhibitor, abscisic acid (ABA), or with two different germination promoters, gibberellic acid (GA3) and 1-Aminocyclopropane carboxylic acid (ACC), a precursor to ethylene. Seeds were incubated in a loam soil at five constant temperatures (5-25 °C) for approximately three months. Results indicate that seed treatments with PGRs can delay or speed germination. The greatest response to the seed treatments was observed at 5 °C. For example, at this temperature PGRs delayed the time for 25% of the seeds to germinate by a maximum of 35 and 21 d and decreased this time by 5 and 25 d for A. t. ssp. Wyomingensis and A. arbuscula, respectively. Field studies are needed to determine if the bet-hedging strategy developed in this study will increase the likelihood that some seeds will germinate during periods that are more favorable for plant establishment.
Download or read book The Challenge of Producing Native Plants for the Intermountain Area written by Intermountain Nurseryman's Association. Meeting and published by . This book was released on 1984 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Countering Misinformation Concerning Big Sagebrush written by Bruce Leigh Welch and published by . This book was released on 2003 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper examines the scientific merits of eight axioms of range or vegetative management pertaining to big sagebrush. These axioms are: (1) Wyoming big sagebrush (Artemisia tridentata ssp.wyomingensis) does not naturally exceed 10 percent canopy cover and mountain big sagebrush (A.t.ssp.vaseyana) does not naturally exceed 20 percent canopy cover; (2) As big sagebrush canopy cover increases over 12 to15 percent, bare ground increases and perennial grass cover decreases; (3) Removing, controlling, or killing big sagebrush will results in a two or three or more fold increase in perennial grass production; (4) Nothing eats it; (5) Biodiversity increases with removing, controlling, thinning, or killing of big sagebrush; (6) Mountain big sagebrush evolved in an environment with a mean fire interval of 20 to 30 years; (7) Big sagebrush is an agent of allelopathy; and (8) Big sagebrush is a highly competitive, dominating, suppressive plant species.
Download or read book Gordon Creek a Superior Tested Germplasm of Wyoming Big Sagebrush written by and published by . This book was released on 1992 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advancing Nursery Production of Big Sagebrush Seedlings written by Emily Carey Overton and published by . This book was released on 2012 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
