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 89 for “"Invasive Plant"”.
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SEX AND DIVERSITY IN THE INVASIVE PLANT HIERACIUM AURANTIACUM
… when colonizing a new range (Baker’s law), as in plant invasions. This study investigated the population structure of the invasive plant Hieracium aurantiacum. H. aurantiacum is an apomict – producing much of its seed asexually – and has become a common invasive in North America and New Zealand. …
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SEX AND DIVERSITY IN THE INVASIVE PLANT HIERACIUM AURANTIACUM
… when colonizing a new range (Baker’s law), as in plant invasions. This study investigated the population structure of the invasive plant Hieracium aurantiacum. H. aurantiacum is an apomict – producing much of its seed asexually – and has become a common invasive in North America and New Zealand. …
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Population ecology and management of the invasive plant, Lespedeza cuneata
Lespedeza cuneata is one of the worst invasive plants across much of the North American Great Plains. In this dissertation, I describe the combination of field experimentation, statistical modeling and spatially explicit computer simulations that I used to investigate the persistence and spread of …
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Quantifying Environmental Maternal Effects in the Invasive Plant, Silene Latifolia
… goal of my thesis was to quantify EME using a plant species, Silene latifolia, which is native to Europe and invasive in North America. I did this by experimentally comparing the amount of variation in life history traits between two generations: Natural (Parent) and Uniform (Offspring). The …
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Solarization as a means to eliminate invasive plant species and target the seedbank
… What was once a thriving population of native plant species has become an environment dominated almost completely by aggressive exotic invasive species. The goal of this project was to remove the nonnative plant habitat by the most cost effective and least labor intensive means. The study area …
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Distribution of Invasive Plant Species on Debris Cones at Mount Rainier National Park
<p>Invasive plant populations within Mount Rainier National Park are a biological and ecological threat to the unique mountain landscape. A better understanding of their distribution and transport within the landscape is needed to improve invasive species monitoring for National Park Service …
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Consequences of interaction between the native ant community and an invasive plant (Euphorbia esula)
… of mutualism during their lifetime (e.g., many plants rely on pollinators and seed dispersers). My research addressed these limitations in mutualism research by investigating (1) the outcomes of interaction between an invasive plant (Euphorbia esula L., Euphorbiaceae) and the native ant …
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A reevalution of Tennessee’s invasive plant species using SERNEC and Maximum Entropy species distribution models
The detection and monitoring of invasive plant species present tremendous challenges to land managers. To reduce the economic and environmental costs associated with developing management plans for invasive plants, organizations such as the National Invasive Plant Council work to rank invasive …
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An Investigation of the Factors that Facilitate and Inhibit the Range Expansion of an Invasive Plant
… respond to global change, and particularly for invasive species, many of which are expected to benefit from global change. Here, I sought to investigate the mechanisms that enable, as well as limit, the range expansion of the globally invasive plant Sorghum halepense (L.) Pers. (Johnsongrass). I …
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Influence of fire and habitat on the removal of invasive plant seeds by granivores in longleaf pine savannas
… of fire-dependent ecosystems by exotic woody plant species can disrupt fire cycles and alter successional trajectories. Prescribed fire is an important tool for managing such ecosystems, yet the role of top-down processes in mediating fire effects on invasion remain poorly understood. Fire may …
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Ethnobotanical survey of problem weeds, alien invasive plant species and their roles in Nzhelele, Makhado Local Municipality, Limpopo Province, South Africa
Background: Problem plants and alien invasive weed species are part of today‟s ecological transformation. Ethnobotanical literature on ecological prominence and ethical values of problem alien weeds is scant and should be documented to avoid loss of valuable species. Aim: The study was aimed at …
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The Relative Roles of Herbivore- and Pollinator-mediated Selection on the Evolution of Floral Display in the Invasive Plant, Lythrum salicaria
Studies assessing the evolution of plant traits frequently focus on pollinators as the primary drivers of floral trait evolution. However, herbivores can also play a role, and, under some circumstances, may even impose stronger selection on floral display than pollinators. This is especially true …
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Quantifying the Expansion of an Invasive Plant Species, Dog-strangling Vine (Vincetoxicum rossicum), in Environmental and Geographic Space Over the Past 130 Years
Invasive plant species are an increasing global threat to native biodiversity. Effective management depends on accurate predictions of their spread. However, modelling the geographic distribution of invasive species, particularly with methods like correlative species distribution models (SDMs), is …
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Disturbance impacts on non-native plant colonization in black spruce forests of interior Alaska
… have historically been relatively free from invasive plants, there have been recent increases in the diversity and range of invasive plants in Alaska. It is critical that we understand how disturbances influence invasibility in northern boreal forests, to avoid the economic damage other …
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Toward a More Integrative Approach to Quantifying the Ecological Impacts of Invasive Plants
Invasive species are reported as one of the top current and future concerns for the health and functioning of native ecosystems. In response, identification of invasive plant impacts are one of the top most studied aspects of plant invasions. Yet we still know very little about invasive plant …
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Changes in avian diversity and potential invasive seed dispersal post-wildfire in a Southeastern deciduous forest; Flipper Bend Woods, Signal Mountain, Tennessee
… major wildfire thought to have been worsened by invasive plants. In order to examine post-fire recovery and invasive plant recolonization, researchers observed the diversity of avian species in a burned and unburned site. Using mist-nets, line-transects, and vegetation analysis, this study found …
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Predicting invadedness of forested protected areas in relation to natural and anthropogenic disturbances
… risk reduction and climate regulation. However, invasive plants threaten these benefits of protected areas by negatively impacting native plants and animals and altering ecosystem structure and function. Natural and anthropogenic disturbances create conditions that may favor establishment and …
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Changes in Wetland Conditions and Wetland Plant Communities in the Prairie Pothole Region After 50 Years
… to assess changes in wetland conditions and plant communities within wetland zones in the Prairie Pothole Region. In 1961-1966, Robert E. Stewart and Harold A. Kantrud conducted a study to investigate the relationship of wetland plant communities to variations of water permanence and …
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