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 16 of 16 for “"Invasion biology"”.
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Towards bioengineered ecosystems: Three studies in invasion biology
… is their invasibility, i.e. their resistance to invasion by nonnative organisms. Invasion is a driver of change at scales as small as a bioreactor and as large as the scale of biogeography. Invasion can be either a desired outcome, for example in the use of probiotics to replace healthful gut …
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Development and utilization of molecular tools to understand invasion biology in Centaurea maculosa (spotted knapweed)
… was to better understand spotted knapweed invasion biology by utilizing molecular tools. I believe this approach was successful in that it led to a variety of interesting results. However, more research is required to fully link these molecular findings with ecological and physiological …
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A Hitchhiker’s Guide to Invasion Biology: Describing the Ecological Mechanisms Underlying the Range Expansions of Two Ixodid Tick Species
… establishment resulted in different patterns of invasion. Understanding how and where these ticks establish is useful in understanding the public health risks associated with areas being invaded.</p> <p>The second objective of this research was to determine the ancestry of the northern …
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A Community's Natural Resistance to Invasion by Cheatgrass and the Effects of Associational Herbivory
Linking theories of invasion biology with that of associational herbivory, I found that (1) cheatgrass was a highly utilized food source for generalist grasshoppers, (2) among native plant species, the amount of herbivory corresponded with their total percent nitrogen and other plant traits, and …
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The eco-evolutionary consequences of multiple introductions for colonizing individuals
… but critical goal in fields as diverse as invasion biology, biological control, climate change-induced species range shifts, and reintroductions of rare species. Propagule pressure, which comprises the number of introduction events (propagule number) and the number of individuals per …
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Factors affecting the dispersal of the invasive ladybirds Coccinella septempunctata and Harmonia axyridis
Biological invasions can have deleterious impacts on native ecosystems, but also offer opportunities for studying evolution. A fundamental question in invasion biology is: what factors are important determining invasion success? Dispersal is essential to the establishment and persistence of …
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Non-structural Deterrents and Opportunistic Dispersal in an Invasive Fish: The Role of Among-Individual Variation on Common Carp Movement
… is rarely considered in aquatic conservation and invasion control. To address this challenge, my thesis applied concepts of behavioural ecology to invasion biology. Using an invasive fish, Common Carp (Cyprinus carpio), as my study species, I examined the influence of among-individual behavioural …
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The legacy of macroevolution: understanding and predicting evolutionary responses to novel environments
… "model clades" for studying urban tolerance and invasion biology. We identified evidence for evolutionary contingencies in the two clades with opposite patterns of trait evolution for each clade. We then used phylogenetic information, species traits, climate, and geographic data to predict …
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Exploring Chemically Mediated Interactions Between Spotted Lanternfly, Lycorma delicatula, and Its Host Plants in the Mid-Atlantic Region of the United States
… mechanisms with management. Chapter I reviews invasion biology, crop risk, and host phytochemistry-based hypotheses. Chapter II evaluates plant-derived semiochemicals as repellents: vineyard assays showed lavender essential oil repelled adults in early fall, with efficacy contingent on …
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Predicting rates and patterns of alien plant spread
The invasion of alien plants into natural ecosystems is a widespread phenomenon that impacts negatively on ecosystem structure and functioning. The invasion and subsequent spread of an alien plant population is equivalent to the processes of colonisation and migration. This implies that the …
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The role of sound and sociability in the success of invasive lionfish (Pterois spp.)
Animals use sensory information to guide a range of behaviours such as foraging, navigating, avoiding predators, and interacting with conspecifics. When invasive species are introduced into novel environments, however, they may face “information landscapes” different to those experienced in their …
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Spread of Red Imported Fire Ant, Solenopsis invicta, in Virginia and effects of sub-lethal exposure to agrochemicals on its behavior
… Virginia. In this study, we explored the invasion ecology of S. invicta through two main objectives. First, we established a comprehensive distribution map of S. invicta in Virginia through multiple survey techniques. We then compared our findings with published models quantifying the …
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Fish invasions in the Mid-Atlantic region of the United States
… patterns and assessed determinants of fish invasions in the Mid-Atlantic region of the United States. Data on nonnative fish distributions were obtained from the United States Geological Survey's Nonindigenous Aquatic Species Database (NASD). Nonnative fishes are introduced by a variety of …
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The effects of Japanese hop (Humulus japonicus) invasion and its interactions with co-occurring plants under variable environmental conditions
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Population genetics of the cichlid, Cynotilapia afra (Günther 1894), in its native and introduced ranges in Lake Malawi
… in evolution of cichlid fishes and in invasion biology when predicting the evolution of invasiveness.In summary, the thesis shows that hybridisation, as well as the introduction of multiple genetically differentiated source populations has increased the genetic diversity of introduced …
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A Cryptic Invasion of the Non-Native Siberian Elm (Ulmus Pumila) to Southwest Missouri
Non-native species invasions are of high ecological importance due to their ability to transform native ecosystems. One such species, Siberian elm, has been shown to have been invading native landscapes across the central and eastern United States since the late 1800s. The natives, American elm and …