Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Bromus tectorum"”.
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Interactions between Bromus tectorum, grasshoppers, and native plants in sagebrush steppe communities
Invasion by the exotic grass Bromus tectorum L. (cheatgrass) has produced widespread, persistent changes in the Intermountain West. As a result of this and other disturbances, sagebrush shrubland is among North America's most imperiled ecosystems. Restoration of B. tectorum-infested areas has often …
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Investigations of Bromus tectorum: restoration strategies and interactions with arbuscular mycorrhizal fungi
Bromus tectorum (L) (cheatgrass, downy brome), one of the most pervasive weeds in the United States, reduces native species diversity and transforms habitats. I conducted four experiments designed to better understand B. tectorum ecology and evaluate control and restoration strategies. I measured …
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Insights in plant ecology from Bromus tectorum invasion in the Great Basin, USA
… native ecosystems. This dissertation examines Bromus tectorum invasion in the Great Basin to increase scientific understanding of invasion dynamics and to provide rigorous information to enhance land management. First, a conceptual model of invasion, the Triangle Model for Evaluating Species …
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A Hydrothermal After-ripening Time Model of Seed Dormancy Loss in Bromus tectorum
… field studies were conducted using seeds of <em>Bromus tectorum</em>. These studies identified four important ranges of water potential that influence the rate of dormancy loss. The ranges are identified as follows: seeds experiencing soil water potentials seeds experiencing soil water potentials …
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Epidemiology of Ustilago bullata Berk. on Bromus tectorum L. and Implication for Biological Control
… biological control agent for cheatgrass (Bromus tectorum L.). The effects of temperature and nutrients on pathogen teliospore germination behavior and the effects of temperature on host seed germination were examined. The effects of temperature on sporidial proliferation, host infection in …
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Restoring semi-arid lands with superabsorbent polymers under reduced precipitation and threat of Bromus tectorum invasion
… invasion. The invasive winter annual grass, Bromus tectorum (B. tectorum), is particularly competitive in disturbed semi-arid areas, has invaded tens of millions of hectares throughout the western US, and its range is projected to expand under predicted climate scenarios. Increasing soil …
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Investigations of physiological and competitive relationships of Elymus species related to establishment in the Great Basin, USA.
… of native perennial bunchgrasses and shrubs. Bromus tectorum (cheatgrass) is the most widespread and problematic of the annual grass invaders in the Great Basin. Restoration in the Great Basin has had limited success. Restoration success could be related to physiology of native plants in …
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A Mechanistic and Landscape Scale Approach Quantifying Habitat Suitability of Cheatgrass (Bromus tectorum) Engineered Habitats for Great Basin Reptiles
… a highly successful plant species, cheatgrass (Bromus tectorum). The result has been the alteration of landscape structure and ecosystem function. This novel habitat has been implicated in biodiversity losses for multiple wildlife taxa in the Great Basin. Yet, an understanding of the mechanisms …
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Cheatgrass (Bromus tectorum L.) management and native plant community recovery on sites selectively treated with Imazapic in Rocky Mountain National Park
Cheatgrass, a winter annual grass introduced to North America from Eurasia, has invaded much of the Western United States over the last century. Recently, cheatgrass has become a threat to the montane and subalpine plant communities and ecosystems of Rocky Mountain National Park (RMNP). Cheatgrass …
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Cheatgrass (Bromus tectorum L.) interactions with arbuscular mycorrhizal fungi in the North American steppe: prevalence and diversity of associations, and divergence from native vegetation
To view the abstract, please see the full text of the document.
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Ecosystem Consequences of Post-Fire Invasive Species in the Great Basin Desert
… function. Non-native plants, such as cheatgrass (Bromus tectorum L.), have aggressively invaded the Western United States. Promoted by overgrazing and fire, this invasion is rapidly converting large expanses of native sagebrush to post-fire invasive communities. The objective of this research was …
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Post-Wildfire Vegetation Response on Diverse Rangelands in Northeast California: Does Livestock Grazing Management Matter?
… recovery after fire. We examined responses of Bromus tectorum, annual graminoids, perennial graminoids, and species diversity to grazing management strategies (rested from livestock grazing one or two growing seasons after fire vs. grazing the growing season after fire) from 1-16 years after …
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Two Post-Glacial Sagebrush Steppe Fire Records at the Wildland-Urban Interface, Eastern Cascades, Washington
… billion annually. In addition, cheatgrass (<em>Bromus tectorum</em>) invasion and anthropogenic-caused warming shorten fire return intervals while lengthening fire seasons. These climatic, ecological, economic, and social factors combine with fuel accumulation resulting from historic fire …
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Ecological Investigations of Chukars in Western Utah
… to be unfounded with no evidence of cheatgrass (Bromus tectorum) dispersal despite widespread utilization. Furthermore, guzzlers designed to benefit Chukar populations were heavily utilized by native species and only slightly (two species at three sites) by other exotics. These three manuscripts …
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Effects of Cheatgrass Control on Wyoming Big Sagebrush in Southeastern Utah
… Young] Welsh) have developed dense cheatgrass (Bromus tectorum L.) understories. These communities are currently characterized by predominately mature to decadent stands of sagebrush with few perennial grasses and forbs. Sagebrush seedlings and perennial grasses compete for limited resources …
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Effects of pretreatment tree dominance and conifer removal treatments on plant succession in sagebrush communities
… by invasive species such as cheatgrass (Bromus tectorum L). By 6 years after treatment, tall grass and cheatgrass cover both increased on prescribed fire and cut treatments, especially at higher pretreatment TDI. However, ratios of cheatgrass to tall grass cover were much lower on cut …
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Investigating population status, habitat, and ecological interactions for the Sand Mountain blue butterfly, one of North America's most geographically restricted butterflies
… of new plants including nonnative and invasive Bromus tectorum. Insects in the order Hymenoptera were found to be carrying the most E. nummulare pollen, and within that order the family Crabronidae was associated with the highest densities of pollen. We use these results to assess the …
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Using patchy plant invasions to understand how diffuse interactions modify facilitation and competition
… exotic plants, <i>Centaurea stoebe</i> and <i>Bromus tectorum</i>, to explore conditionality in plant interactions and the implications of this conditionality for community invasibility. Additionally, I expanded this research to investigate how these two invaders interact with each other as …
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