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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 51 for “"biological invasions"”.
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Biological invasions in brackish waters
… high abundance of NNS, studies on biological invasion in brackish waters has received considerably less attention than truly freshwater and marine systems. In this thesis, I investigate the discovery, ecological impacts, and management of NNS in brackish waters. I begin by …
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Ecological impacts of biological invasions on native birds in Africa
The impacts of biological invasions on native avian diversity have been the subject of many studies in Africa. However, a holistic synthesis of available information from different taxa and their impacts on native birds is lacking. From published information, I analysed the negative and positive …
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Scientific and educational strategies a sustainable port activity against biological invasions
Una gran parte de la población mundial habita hoy en día en el entorno costero debido a la amplia variedad de recursos ecosistémicos que este ofrece. Los ecosistemas marinos pueden ser empleados como fuente de alimentos o energía, y suponen un recurso económico importante. El crecimiento de la …
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Use of genetic methods for determining patterns and processes during marine biological invasions
… genetic methods to the study of marine bioinvasions in the last two decades. This work aims to build on and extend current advances in the use of molecular techniques for understanding marine bioinvasions, and in particular invasive ascidians. Part One (Chapters Two and Three) contains …
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Preparing plant collections for biological invasions: a study of the effects of emerald ash borer (Agrilus planipennis Fairmaire) through case study analysis
… environmental and economic destruction that biological invasions like chestnut blight and Dutch elm disease have caused. In more recent years the exotic, Asian-introduced emerald ash borer (EAB; Agrilus planipennis Fairmaire) has decimated North American ash populations. If public …
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The Role of Evolutionary Processes in a Biological Invasion: An Experimental Study with <em>Silene latifolia</em>
<p>Biological invasions are one of the greatest threats to biodiversity. The cost of these introduced species is staggering - damages associated with introduced species cost the United States around $138 billion annually. Despite the growing appreciation of the importance of biological invasions, …
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The Wandering Mussels: Analyzing the Ecological Impact of Dreissenid Mollusks Across Spatial and Temporal Scales in Eastern Ontario Using Environmental DNA
Biological invasions profoundly disrupt aquatic ecosystems, yet predicting their long-term trajectories remains challenging. To address this, I propose the Alien Succession Hypothesis (ASH), a novel theoretical framework conceptualizing biological invasions as a form of ecological succession …
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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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COEXISTENCE, RESILIENCE AND RESISTANCE OF MARINE INVERTEBRATE COMMUNITIES ACROSS A LATITUDINAL GRADIENT
… across oceans serving as vectors for marine biological invasions. Among my three aims I was able to: (1) examine how the complementarity of ecological niches varies from the tropics to subarctic among recruiting taxa, and how the differentiation of these recruitment pulses through time help …
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Modelling and empirical approaches for predicting the invasiveness of alien species.
Biological invasions are a pervasive aspect of global change that result from the release of alien species into novel environments. Where an introduced alien establishes a sustainable population, disperses and impacts native species then it is considered as invasive. Predicting the outcomes of …
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Le piante aliene nel Mediterraneo: comparazione tra Sardegna, Corsica e isole circumsarde.
… of the most vulnerable habitats at risk of biological invasion. The first part of the work has been focused on the comparison of the exotic flora of Sardinia with that of another insular system, Corsica, in order to acquire the information necessary to define new strategies, guidelines and …
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A Human-Centered Approach to Designing an Invasive Species Eradication Program
The increasing scope and speed of biological invasions around the world is a major concern of the modern environmental conservation movement. Although many ecological impacts of biological invasions are still not well understood, there is a general consensus that exotic, invasive species are a …
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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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Efeitos de resíduos foliares de Prosopis juliflora na germinação e crescimento inicial de espécies cultivadas.
… countries of the world can be evidenced cases of biological invasions, either as a natural phenomenon or as a result of human action. A very common example of biological invasion is the case of mesquite (Prosopis juliflora SW), which was introduced in the Brazilian Northeast in the 40's due to …
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Ecotypic Variation in Johnsongrass in Its Invaded U.S. Range
Biological invasions have been observed throughout the world for centuries, often with major consequences to biodiversity and food security. Tying invasion to species identity and associated traits has led to numerous hypotheses on why, and where, some species are invasive. In recent decades, …
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Spatiotemporal population genomics of marine species : invasion, expansion, and connectivity
… with an emphasis on invasive marine species. Biological invasions are often characterized by a range expansion, during which strong genetic drift is hypothesized to result in decreased genetic diversity with increased distance from the center of the historic range, or the point of invasion. In …
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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
… understanding of the drivers of successful biological invasions in freshwater systems.
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Pattern and process of plant invasion in an African savanna ecosystem, with emphasis on multiple spatial and temporal scales
Biological invasions are a significant ecological and economic global crisis. Protected areas also suffer from the increased burden that invasions place on their resources and the impacts placed on the ecosystem. However, management requires an ecological foundation which can inform best practice …
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Spationtemporal population genomics of marine species : invasion, expansion, and connectivity
… with an emphasis on invasive marine species. Biological invasions are often characterized by a range expansion, during which strong genetic drift is hypothesized to result in decreased genetic diversity with increased distance from the center of the historic range, or the point of invasion. In …
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