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 26 for “"Invasion success"”.
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Biotic and abiotic factors influencing the invasion success and ecological impacts of the Pacific oyster, Crassostrea gigas
… Ecological impacts associated with C. gigas invasions have been both positive and negative depending upon the context. However, invasions onto beds of the native blue mussel, Mytilus edulis, have seen shifts in dominance from mussels to oysters. Although invasions of C. gigas have been …
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Role of Hybridization in a Biological Invasion: An Experimental Study with Silene Latifolia
Biological invasions are now the second leading cause of loss of biodiversity. Recently, hybridization has been hypothesized as a mechanism for invasion success. The combination of individuals from different gene pools may create novel genotypes having increased invisibility. The goal of my …
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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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The Influence of Metacommunity Connectivity and Invasive Species on Diversity and Ecosystem Properties: Invasion, Predation by Native Species, and Genetic Diversity of Propagules
… of this, billions of dollars are spent toward invasion prevention and control efforts annually. Once invaders have become established in a novel environment, however, eradication efforts are often not only extremely costly, but also wholly impractical. Thus, preventing the initial establishment …
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Temporal trends in stream-fish distributions, and species traits as invasiveness drivers in New River (USA) tributaries
Biological invasions represent both an urgent conservation problem and an opportunity to advance ecological theory. Development of pertinent research questions and proactive management strategies require knowledge of which introduced species are present and of spatiotemporal trends in the …
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Invasion genomics, adaptive evolution, and transcriptional plasticity of Anopheles stephensi in Ethiopia and Yemen : implications for malaria transmission and control.
… plasticity, and genomic adaptation shape the invasion success of this emerging vector and influence malaria control efforts. Multi-locus analyses reveal genetic interactions between An. stephensi and Plasmodium falciparum, highlighting evolutionary feedbacks within the transmission system. …
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Functional traits and resource-use strategies of native and invasive plants in Eastern North American forests
… investigate the role of resource limitation on invasion success in the field. I manipulated understory light environments (overstory tree removal) and N availabilities (ammonium-nitrate fertilization) to create a resource gradient across plots each containing 3 invasive and 6 native woody …
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Range expansion in the invasive Round goby (Neogobius melanostomus): behavioural and gene transcriptional components of a successful invader
… gene transcription can also be influential in invasion success, promoting acclimation to novel environments. My study species, the round goby (Neogobius melanostomus), is an invasive fish continuously expanding its range in the Laurentian Great Lakes and its tributaries. This thesis aims to …
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An experimental test of intra- and inter-specific competition between invasive western mosquitofish (Gambusia affinis) and native plains topminnow (Fundulus Sciadicus)
… might not always be the key mechanism of invasion, even for one of the most successful aquatic invasive species widely known for their aggressive behavior. In mosquitofish, other ecological traits such as fast reproductive cycle and tolerance to a wide range of environmental conditions …
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The effects of an invasive species on the structure of native ecosystems
… factors that may play a role in determining the invasion success of A. modestus in Ireland and also at sites in Scotland and Portugal, which represent the northern and southern limits of this species in Europe. Long-term monitoring of the colonisation of space by A. modestus and native barnacle …
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Mathematical Modelling of Emergent Survival in Microbial Communities
… networks that determine community stability, invasion success, and resilience to external perturbations. The concept of emergence – where community-level behaviours and properties arise from interactions among individual member species – has proven essential for understanding microbial …
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Assessing environmental factors structuring populations and movement dynamics of the invasive snail Tarebia granifera in a subtropical Austral reservoir
… worldwide, but environmental drivers of invasion dynamics lack assessment. Understanding alien species ability to self-disperse via locomotion following arrival to new environments is also critical for prediction of invasion success. The study assessed: (i) the distribution and abundance …
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SEX AND DIVERSITY IN THE INVASIVE PLANT HIERACIUM AURANTIACUM
… 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. The …
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SEX AND DIVERSITY IN THE INVASIVE PLANT HIERACIUM AURANTIACUM
… 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. The …
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Biogeographical Approaches for Studying Species Invasion
Many of the most notorious biological invasions occur at continent-wide or global scales but studies investigating mechanisms enhancing species invasions are often conducted at small spatial scales. Moreover, the contribution of mechanisms facilitating invasion might also vary across a geographical …
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Assessing risk to native ecosystems: using exotic ants as a model
… understanding the processes that facilitate invasion success, and the potential mechanisms and magnitude of impact, are critical for effective biosecurity management. Predicting risk associated with exotic species, so that management actions can be justified, is a major challenge faced by …
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Prey preference for Asian carp and soft plastic lure ingestion by largemouth bass
… to predation may explain the greater invasion success of silver carp. Similar or higher vulnerability to predation of Asian carp compared to common native prey suggests that they may serve as viable prey for native predators mitigating the potential negative impacts on the native prey …
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