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 24 for “"biological invasion"”.
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Making biosecurity, making Mexico : an ethnography of biological invasion
… projects establish the ways that a shared biological substantiality connects the nation and how human and non-human life forms are incorporated into political identities. Through these projects scientists produce knowledge about Mexican biology (including who or what is included or excluded …
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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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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 use of ecological studies, genetic tools, and citizen science to asses the biological invasion status of green seaweed Codium fragile (Suringar) Hariot 1890 in the southern area of the Bay of Biscay (Cantabrian Sea)
Codium fragile subsp. fragile Suringar (Hariot) 1890 está catalogado como uno de los 100 peores invasores de Europa. Cinco especies de Codium se registran en la fauna intermareal marina a lo largo de la costa cantábrica, como nativas (C. tomentosum, C. decorticatum, C. vermilara y C. adhaerens) y …
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Adaptation and hybridization in Helicoverpa crop pests
… food security and biodiversity. The process of biological invasion often results in secondary contact between closely related taxa, producing ‘experiments in evolution’. Evolutionary genetics can be used to study invasive species and inform their management. In this thesis I focus on noctuid …
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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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Bioeconomics Of Invasive Species: The Gypsy Moth
… I would like to integrate economic analysis and biological analysis in this dissertation to provide a framework for bioeconomic research. I also want to study the spatial nature of the biological invasion process and design spatial policies to target invasive species. Computational methods are …
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Out of Africa & into the Sunshine State : tracking an exotic invader
… to understand how they got here, how their invasion is wreaking havoc on native ecosystems, and most of all, how to eliminate them for good. The challenges he's faced along the way echo the wider concerns of fighting invasive species, which represent one of the greatest threats to global …
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Exotic Species Invasion and Biodiversity in Bangladesh Forest Ecosystems
Both, biological invasion by exotic plant species and biodiversity including spatial patterns and drivers are two major issues in tropical forest ecosystems. This dissertation deals with these two issues in a tropical forest ecosystem in Bangladesh. Considering the first issue, it comprises two …
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Avaliação da germinação e crescimento inicial de oleaginosas cultivadas com a aplicação de produtos foliares de algaroba
… are plants traditionally grown in this region. Biological invasion is a phenomenon that causes changes in the dynamics of natural ecosystems invaded by the establishment of exotic plants. The mesquite (Prosopis juliflora (SW) DC.) is an invasive plant that causes changes in the composition of …
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Caracterização biométrica de frutos, emergência e vigor de sementes de Cryptostegia madagascariensis bojer ex decne., espécie invasora no bioma caatinga
Biological invasion is the process in which an organism exotic to adapt is competing with advantages with native species, causing serious impacts. Introduced in Brazil with landscaping purpose, Cryptostegia madagascariensis, has been revealed as invasive species. Populations arise naturally and …
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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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Causes and consequences of color polymorphism in Rambur’s forktail (Ischnura ramburii)
… My thesis draws upon the unique context of a biological invasion to elucidate factors that promote and maintain this variation in female color. Empirical work in my dissertation is focused upon Rambur’s Forktail (Ischnura ramburii), a species native to the Americas that invaded Hawaii in the …
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Ecosystem Functional Consequences of Top Predator Mortality Due to the Invasive Shrub, Lonicera maackii
… overall picture of the possible consequences of biological invasion. </p>
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Biological invasions in brackish waters
… waters are transitional areas subject to invasion by taxa that may subsequently spread into adjacent freshwater and marine systems. The tendency for ports to be situated in brackish estuaries makes them particularly susceptible to ship-borne introductions of NNS. Despite being reported as …
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Population ecology and management of the invasive plant, Lespedeza cuneata
… the persistence and spread of an L. cuneata invasion in a native prairie site. Management treatments reduced local infestations, but failing to treat led to large increases of L. cuneata. Density-based models with even simple spatial information were more predictive than presence/absence …
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Leaf Traits, Neighbors, and Abiotic Factors: Ways That Context Can Mediate the Impact of Invasive Species on Nitrogen Cycling
<p>Species invasions are more prevalent than ever before. While the addition of a species can dramatically change critical ecosystem processes, factors that mediate the direction and magnitude of those impacts have received less attention. A better understanding of the factors that mediate invasion …
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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 evolution of caste-specific morphology and colony structure in ants
… behaviorally, and morphologically, but biological functions may conflict with each other and therefore constrain their evolution. Eusocial organisms live in colonies that possess morphologically distinct castes that divide biological roles among individuals. Males and reproductive …
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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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