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Dissertations / Theses on the topic 'Invasion spread'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Parnell, Stephen Robert. "The invasion and spread of fungicide resistance." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613759.

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2

Nati, Julie Jeanne Helene. "Invasion physiology : do physiological characteristics facilitate the spread of invasive fish species?" Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/8104/.

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A considerable number of abiotic (e.g. temperature) and biotic factors (e.g. intra-interspecific interactions) contribute in shaping species’ distribution and invasiveness but knowledge is still lacking regarding the importance of physiological and behavioural traits in determining the distributions of ectotherms and especially the invasion success of non-native species into novel habitats. With rising temperatures, distribution shifts in many of fish species have been observed. Additionally, changing thermal conditions are facilitating the colonisation of invasive species. It is crucial that

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3

Hilker, Frank Mathias. "Spatiotemporal patterns in models of biological invasion and epidemic spread." Berlin Logos-Verl, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2695659&prov=M&dok_var=1&dok_ext=htm.

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4

Ramakrishnan, Alisa Paulsen. "Genetic patterns of dispersal and colonization during initial invasion and spread of an invasive grass, Brachypodium sylvaticum." PDXScholar, 2010. https://pdxscholar.library.pdx.edu/open_access_etds/355.

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Evolution of genotypes during range expansion is driven in part by colonization dynamics. I investigated genetic patterns of colonization and dispersal during initial expansion of an invasive bunchgrass, Brachypodium sylvaticum, into Oregon. Using microsatellite markers, I sampled plants at two different scales: at regular intervals along three parallel roads spanning about 30km, and in populations identified throughout Oregon. I also collected field-generated progeny from a subset of populations and used molecular identification of outcrossing events to estimate selfing rates in both central

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5

Hari, Krishnan Ramesh Kannan. "Invasion of Lantana into India: analyzing introduction, spread, human adaptations and management." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001756.

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Objectives and Research Questions 1. To reconstruct the history of invasion of Lantana in India from where, by who, and when was Lantana species introduced into India?, given its long history in the country, is it still spreading or has it become more or less stable? 2. To study the human adaptation to Lantana invasion: socioeconomic causes and consequences of the use of Lantana as an alternative source of livelihood for forest dependent communities in southern India; how have local communities adapted to the invasion?; what are the key determinants that may have driven communities to use Lant

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6

Croskey, Audra. "Evaluating the Costs of the Emerald Ash Borer Invasion in Ohio." University of Toledo / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1257893435.

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7

Taylor, Laura Alayna. "Propagule Pressure and Disturbance Drive the Spread of an Invasive Grass, Brachypodium sylvaticum." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/41.

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The invasibility, or susceptibility of an ecosystem to biological invasion is influenced by changes in biotic and abiotic resistance often due to shifts in disturbance regime. The magnitude of invasive propagule pressure interacts with an ecosystem's invasibility to determine the extent of a biological invasion. I examined how propagule pressure, forest community structure and disturbance interact to influence the invasibility of temperate Pacific Northwest forests by the newly-invasive grass, Brachypodium sylvaticum. My goal was to identify which of these factors is most instrumental in enabl

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8

Vliet, Andrew J. "Ecology of a biological invasion : the spread of the European starling in the United States." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.256705.

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9

Hammann, Mareike [Verfasser]. "Invasion ecology of marine macroalgae : the relevance of stress resistance for the invasion success of Gracilaria vermiculophylla and consequences of its spread / Mareike Hammann." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1153768542/34.

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10

Olsson, Aaryn D. "Ecosystem Transformation by Buffelgrass: Climatology of Invasion, Effects on Arizona Upland Diversity, and Remote Sensing Tools for Managers." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/145715.

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Invasive species drive ecosystem changes throughout the world. Introduced grasses in dryland ecosystems have driven a grass-fire cycle that transforms ecosystems into homogenized grasslands (Brooks et al. 2004; D'Antonio & Vitousek 1992). Little is known about the spread rates of these grasses, effects on native ecosystems or how climate modulates spread, yet these uncertainties may be the difference between success and failure. Equally important is a quantitative assessment of the current states of invasion, yet mapping efforts have been lacking and remote sensing assessments have been inadeq

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11

Pelon, Floriane. "Fibroblastic heterogeneity and metastatic spread in breast cancers Fibroblast heterogeneity drives metastatic spread in breast cancer through distinct mechanisms." Thesis, Sorbonne Paris Cité, 2018. https://wo.app.u-paris.fr/cgi-bin/WebObjects/TheseWeb.woa/wa/show?t=2392&f=17330.

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Les cancers du sein, premiers cancers féminins et causes aujourd’hui encore de nombreux décès, sont classés en 3 sous-types moléculaires : luminaux –les plus répandus, HER2 et triple-négatifs (TN) –les plus agressifs. Lors du diagnostic, l’envahissement des ganglions lymphatiques axillaires par les cellules tumorales est établi. Il s’agit, en plus de la classification moléculaire, d’un marqueur pronostique utilisé en clinique pour stratifier les patientes, car il informe sur le risque de développement ultérieur de métastases, cause majeure des décès à l’heure actuelle. Les tumeurs solides, et

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12

Jordan, Scott G. "Modeling the Spread of Alfalfa Stem Nematodes: Insights into their Dynamics and Control." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7055.

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Alfalfa is a major cash crop in the western United States, where fields that are infested with the alfalfa stem nematode (Ditylenchus dipsaci) can be found. With no nematicides available to control alfalfa stem nematode spread, growers can use nematode resistant varieties of alfalfa to manage nematode populations in a field. A deterministic, discrete-time, host-parasite model is presented that describes the spread of alfalfa stem nematodes on resistant hosts that was fit to experimental data obtained in Weber County, Utah. Numerical results obtained from simulations with the model are used to

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13

Ferreira, Mariana de Campos Quirino dos Santos. "Landscape composition and climatic parameters significant in the spread of an invasive species (Pine wood Nematode)." Master's thesis, Faculdade de Ciências e Tecnologia, 2014. http://hdl.handle.net/10362/12610.

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Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente<br>Studies show that the number of biological invasions has increased. The spread of species from their native range to other places is directly related to the increase in transport and movement of people and their goods. The Pine Wood Nematode (Bursaphelenchus xylophilus) (PWN), the causal agent of the pine wilt disease, is an example of this problem, originated from North America, has become a serious pest on Eurasia. This dissertation aims to understand if environmental factors are determining tree mortality in an area

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Dal, Ben Giorgia <1995&gt. "The silent invasion of mobile payments: the different spread, impact and importance of digital payments in China and Italy." Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/18199.

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This work aims at analysing the different spread, impact and importance that digital payments have in two specific areas: China and Italy. Starting from an overview of the historical evolution of money and the description of payment systems, the first chapter underlines how digital payments are playing a crucial role in the countries’ economic and financial environments. Nevertheless, they are developed and perceived by countries in different ways. In the second chapter, after an explanation of the evolution of the Chinese financial sector, I will investigate the development of electronic paym

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Thorlacius, Magnus. "Round goby invasion of the Baltic Sea : the role of phenotypic variation." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-111910.

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Biological invasions are a major threat to biodiversity world wide with annual economic costs up to 1.4 trillion dollars. The round goby (Neogobius melanostomus) is a particularly fierce invader that threatens ecological function of the Baltic Sea. Individual variation in behavioral traits that remain constant through time and context have been identified as crucial factors for explaining different parts of the invasion process. For example, asocial behavior facilitates dispersal from high density populations and comes with fitness benefits in low conspecific density. The latter is especially

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Shouman, Sabrina. "Invasive spread of sycamore [maple] (Acer pseudoplatanus L.) in temperate forest ecosystems : a cross-continental ecophysiological approach." Thesis, Amiens, 2017. http://www.theses.fr/2017AMIE0001.

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Les espèces végétales invasives représentent une menace sérieuse pour l'homme dans la mesure où elles modifient et endommagent les écosystèmes du monde entier. La détermination des caractéristiques qui permettent aux espèces invasives de s'installer et de se développer avec succès dans les communautés résidentes est d'importance majeure. Comparer les performances des espèces invasives dans leur région d'indigénat et dans les régions exotiques envahies, d'une part, et mettre en relation ces performances avec celles des espèces indigènes co-occurrentes est une approche possible pour identifier c

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17

Taylor, Caroline Mary. "Modeling the spread and control of Spartina alterniflora in a Pacific estuary : the consequences of an Allee effect in a plant invasion /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.

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18

Haran, Julien. "Dispersion des espèces impliquées dans une association phorétique vecteur - pathogène nouvellement formée : le cas de Monochamus galloprovincialis, vecteur natif d’un nématode invasif en Europe (Bursaphelenchus xylophilus)." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2046/document.

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Les invasions biologiques se sont intensifiées au cours des dernières décennies en raison d’une accélération des échanges commerciaux. Ces invasions représentent une menace pour les écosystèmes et de nombreuses activités anthropiques, il est donc crucial de comprendre les mécanismes qui les sous-tendent afin de mieux prévoir et limiter leurs impacts. Dans cette thèse, j’aborde la question du potentiel dispersif d’espèces natives et non natives impliquées dans une association phorétique nouvellement formée. En particulier, je me focalise sur le cas de l’association entre un nématode invasif rav

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Briody, Ashleigh. "Retrospective Evaluation of Diffusion Weighted MRI Imaging of Head and Neck Cancers and the Correlation with Histopathology." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu150296320276419.

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20

Valantinaitė, Audronė. "Sosnovskio barščio (Heracleum sosnowskyi Manden) ir uosialapio klevo (Acer negundo L.) plitimo ypatumai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20110601_105446-01828.

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Sosnovskio barščio ir uosialapio klevo plitimo tyrimai buvo atliekami Pasvalio ir Kauno rajonuose. Tyrimo metu buvo nustatoma šių augalų plitimo ypatumai, efektyviausios kontrolės priemonės, invazijos agresyvumo lygmenys. Gauti tyrimai parodė, kad vanduo daro didesnę įtaką uosialapio klevo išplitimo atstumams nei vėjas, nes jų buvo aptinkama visame 10 km tirtos upės pakrantės ruože, o toliausiai vėjo pagalba atsiradę savaiminukai buvo aptikti iki 100 metrų nuo motininio medžio. Šie augalai dera gausiai, vidutiniškai vienas uosialapio klevo medis subrandina 70 tūkst. Sėklų. Sosnovskio barščio 1

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Gatehouse, Hazel A. W. "Ecology of the naturalisation and geographic distribution of the non-indigenous seed plant species of New Zealand." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/1009.

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The naturalisation and subsequent spread of non-indigenous plant species (NIPS) is a major problem for most regions of the world. Managing plant invasions requires greater understanding of factors that determine initial naturalisation and distribution of wild NIPS. By the year 2000, 2252 NIPS were recorded as wild (1773 fully naturalised and 479 casual) in New Zealand. From published literature and electronic herbaria records, I recorded year of discovery of wild populations, and regional distribution of these wild NIPS. I also recorded species related attributes hypothesised to affect natural

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22

Brobäck, David. "Preventing the spread of the invasive plant Lupinus polyphyllus." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-272024.

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Invasive species are an increasing problem worldwide, threatening indigenous communities and species. Many human-made environments promote introductions of alien species and one such habitat is road verges. The invasive plant Lupinus polyphyllus is benefiting from these habitats and is today widespread along road verges in many parts of Sweden. However, it has been shown to be a problematic species, as it supresses native plants. Many of these plants originate from semi-natural grasslands, but have found a refuge in road verges. The Swedish Transport Administration has tried to control L. poly

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23

Favaro, Riccardo. "Invasive Wood Borers: Detection, Establishment and Spread." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424701.

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The increasing international trade occurred in the last decades has raised the risk of introduction of invasive species. These are organisms introduced in new environments located out of their native area. Plants and insects represent the most common invasive species. Concerning insects, wood borers are the most important for forest ecosystems. Introductions of invasive alien species have strong ecological and economic effects on native fauna and their interception and eradication are prior goals. In the present work, the Asian longhorned beetle, Anoplophora glabripennis (Motschulsky), recent

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24

Parker, Ingrid Marie. "Ecological factors affecting rates of spread in Cytisus scoparius, an invasive exotic shrub /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/5218.

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Pitt, Joel Peter William. "Modelling the spread of invasive species across heterogeneous landscapes." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/912.

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Invasive species are well known to cause millions of dollars of economic as well as ecological damage around the world. New Zealand, as an island nation, is fortunate because it has the opportunity to regulate and monitor travel and trade to prevent the establishment of new species. Nevertheless foreign species continue to arrive at the borders and continue to cross them, thus requiring some form of management. The control and management of a new incursion of an invasive species would clearly benefit from predictive tools that might indicate where and how quickly the species is likely to sprea

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26

Kelly, Ruth. "Freshwater invasive plants in Ireland : distribution, impacts and spread." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.643430.

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27

Soley, Nathan. "Reproductive Biology of the invasive plant Elaeagnus umbellata: breeding system, pollinators, and implications for invasive spread." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1164.

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Reproductive studies in invasive plants are necessary for an understanding of their potential to establish and spread in foreign environments. Elaeagnus umbellata Thunb. (autumn olive) is an invasive woody shrub that flowers early in the spring and is often noted for its abundant fruit set. This study examined the reproductive biology of E. umbellata in Illinois, where it is highly invasive. Hand-pollination experiments were performed to determine the breeding system of E. umbellata, and floral visitors were collected to determine its pollinators. Experiments showed that E. umbellata is a pred

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Redwood, Mame S. "The Effect of Silviculture Management on the Spread of Three Invasive Species." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1337273012.

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Ulman, Aylin. "Recreational boating as a major vector of spread of nonindigenous species around the Mediterranean." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS222.

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Les écosystèmes marins sont bouleversés par de nombreux phénomènes tels que la surpêche, la pollution, le changement climatique et les espèces invasives, dont les impacts conjugués affectent négativement leurs structures et fonctionnements. Il est urgent d’évaluer le rôle de la navigation de plaisance comme facilitateur des invasions biologiques, et particulièrement pour la mer Méditerranée qui accueille deux tiers du trafic mondial de bateaux affrétés, et constitue le point chaud de la problématique des espèces non indigènes. Cette thèse se propose de combler ce besoin en accomplissant la pre

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Christen, Douglas C. "Distinguishing the habitat, corridor and conduit functions of roads in the spread of invasive plants." Ohio : Ohio University, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125611713.

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Reilly, Stephanie A. "Forecasting the Spread and Invasive Potential of Apple Snails (Pomacea spp.) in Florida." NSUWorks, 2017. http://nsuworks.nova.edu/occ_stuetd/460.

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Forecasting the potential range of invasive species is a critical component for risk assessment, monitoring, and management. However, many of these invasive species are not yet at equilibrium which can be problematic for many modelling approaches. Using the climate matching method, MaxEnt, a series of species distribution models (SDMs) and risk analysis maps were created for select apple snail species in Florida: Pomacea canaliculata, P. diffusa, and P. maculata. Apple snails, freshwater gastropods in the family Ampullariidae, are native to South America and were introduced to the United State

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Clarke, Murray Cathryn Lynne. "The role of recreational boating in the introduction and spread of marine invasive species." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42090.

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Introduction and spread of non-indigenous species is a significant threat to the preservation of global biodiversity. Human-mediated vectors are responsible for transporting potentially invasive species to new habitats throughout the world. This research investigates the role of recreational boating movements as a vector for introduction and spread of invasive species. A baseline survey of subtidal fouling communities was conducted using artificial substrates in marinas of the southern Strait of Georgia, British Columbia. There was both a high presence of non-indigenous species and high n

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Sezen, U. Uzay, Jacob N. Barney, Daniel Z. Atwater, et al. "Multi-Phase US Spread and Habitat Switching of a Post-Columbian Invasive, Sorghum halepense." PUBLIC LIBRARY SCIENCE, 2016. http://hdl.handle.net/10150/622119.

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Johnsongrass (Sorghum halepense) is a striking example of a post-Columbian founder event. This natural experiment within ecological time-scales provides a unique opportunity for understanding patterns of continent-wide genetic diversity following range expansion. Microsatellite markers were used for population genetic analyses including leaf-optimized Neighbor-Joining tree, pairwise FST, mismatch analysis, principle coordinate analysis, Tajima's D, Fu's F and Bayesian clusterings of population structure. Evidence indicates two geographically distant introductions of divergent genotypes, which

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Hebebrand, Kristen Marie. "Potential Spread of Hydrilla verticillata in the Great Lakes Basin." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1546710742578768.

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Damery-Weston, Jaron. "Buffelgrass Expansion Rate and Dispersal Type on Recently Invaded Barry M. Goldwater Range of Southwestern Arizona." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/613386.

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Land managers have struggled to develop successful control strategies to address buffelgrass invasion in the Sonoran Desert. Two important variables for control strategies are dispersal type and patch expansion rate (i.e. satellite or invasion front). We investigated these variables along a highway invaded within the last 10 years located south of Gila Bend, Arizona, USA. Dispersal type was calculated by documenting the location of each buffelgrass individual along a 16 km stretch of highway and using an average nearest neighbor analysis in ArcMap 10.2.2. Thirty-six patches were monitored for

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Morandi, Marc Joseph. "Assessing the Influence of Different Inland Lake Management Strategies on Human-Mediated Invasive Species Spread." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365116997.

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Christen, Douglas. "Distinguishing the Habitat, Corridor and Conduit Functions of Roads in the Spread of Invasive Plants." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1125420469.

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Robinson, Elizabeth Sophie MacLeod. "The spread and impacts of invasive non-native plants in a human-dominated landscape : the case of Japanese knotweed." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/24557.

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The increased movement of plants around the world is a serious and impactful environmental consequence of increased human dominance globally. Some of these plants will become established in new areas, some will proliferate, and some will become invasive causing environmental and socio-economic damage. Environmental processes contribute to plants becoming introduced, established and invasive. However, humans have an increasingly important role in all stages of the invasion process. In particular, the social processes that shape decision making, such as knowledge, risk perceptions, values and at

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Banks, Christopher Mark. "New Zealand Calanoid Copepod Invasions: Has Artificial Lake Construction Facilitated Invasions, and are our Coastal Waters Uninvaded?" The University of Waikato, 2007. http://hdl.handle.net/10289/2269.

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Non-indigenous species have become a global issue of increasing importance in recent years, with many causing significant environmental and economic damage. Identifying locations vulnerable to invasion allows for focus of management efforts towards prevention of invasions at those locations. In order to determine whether constructed water bodies, such as reservoirs, ornamental lakes or retired mines, are more easily invaded environments than natural water bodies, owing to decreased biotic resistance, the distributions of native and non-indigenous freshwater calanoid copepod species in the Nort

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Blom, Linda. "Invasiva främmande arter : En undersökning i Värmlands län." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104860.

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Invasiva främmande arter är ett av de största hoten mot biologisk mångfald samt att de medför stora ekonomiska kostnader. Kommunerna spelar en viktig roll gällande tillsyn och bekämpning av invasiva främmande arter då de ofta är fastighetsägare och ansvarar för stora arealer. Med ett varmare klimat kan många arter som varit ett problem i varmare länder och i södra delarna av Sverige bli ett problem även på nordligare breddgrader. Det kan därför vara viktigt att kommunerna har ett väl fungerande arbete med etablerade arter och en beredskapsplan mot de arter som kan komma att bli ett problem i f

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Kvistad, Jake T. "Modeling Ballast Water Management Strategies for Slowing the Secondary Spread of Aquatic Invasive Species on the Laurentian Great Lakes." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1533328303491667.

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Banks, Natalie C. "The tangled web we weave: Human-mediated spread of invasive species via trade networks using nematodes as model organisms." Thesis, Banks, Natalie C. (2017) The tangled web we weave: Human-mediated spread of invasive species via trade networks using nematodes as model organisms. PhD thesis, Murdoch University, 2017. https://researchrepository.murdoch.edu.au/id/eprint/36500/.

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Human trade networks play a major role in the unintended introduction of invasive species to new environments. Network Science has shown that the structural properties of networks influence the movement of goods as well as their associated organisms. This thesis examines how the properties of one type of network, the plant produce trade network, aid the movement of one group of potentially invasive organisms, nematodes. The presence, diversity, abundance and dispersal of nematodes via these networks and points critical to the flow of goods as well as nematodes, were also examined. A survey

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Brown, Peter M. J. "The spread of the harlequin ladybird Harmonia axyridis (Coleoptera: coccinellidae) in Europe and its effects on native ladybirds." Thesis, Anglia Ruskin University, 2010. http://arro.anglia.ac.uk/268912/.

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Native to Asia, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is an invasive non-native ladybird in Europe and North America, where it was widely introduced as a biological control agent of aphids and coccids. There were three main objectives of this study: firstly, to investigate the spread and distribution of H. axyridis in Europe from the start of the invasion process; secondly, to study its ecology in Great Britain; and thirdly, to examine its effects on native ladybirds in Britain. In Europe, collaborations with a network of scientists allowed the collation of H. axyridis occurre

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Brown, Peter M. J. "The spread of the harlequin ladybird Harmonia axyridis (Coleoptera: coccinellidae) in Europe and its effects on native ladybirds." Thesis, Anglia Ruskin University, 2010. https://arro.anglia.ac.uk/id/eprint/268912/6/Brown_2010.pdf.

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Native to Asia, Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae) is an invasive non-native ladybird in Europe and North America, where it was widely introduced as a biological control agent of aphids and coccids. There were three main objectives of this study: firstly, to investigate the spread and distribution of H. axyridis in Europe from the start of the invasion process; secondly, to study its ecology in Great Britain; and thirdly, to examine its effects on native ladybirds in Britain. In Europe, collaborations with a network of scientists allowed the collation of H. axyridis occu

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Timar, Levente. "Modeling the Anthropogenic Spread of an Aquatic Invasive Species: The Case of Zebra Mussels and Transient Recreational Boating in Wisconsin." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-07112008-122212/.

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Transient recreational boating is the principal overland vector of dispersal for several freshwater invasive species. Traditional models of human-mediated aquatic invasions use aggregate data on boating patterns, and are unable to incorporate changes in boater behavior. This limits their practicality because most control policies, by targeting the human vector, are expected to have behavioral consequences, and a complete policy assessment needs to consider the resultant shift in invasion pressure. In this dissertation, I develop a framework that utilizes site choice probabilities from a travel

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Sieracki, Jennifer L. "Spatial Modeling as a Decision-making Tool for Invasive Species Management in the Great Lakes." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1408630726.

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Sevillano, Garcia Mayeya Lucero. "The Effects of Biological Control Agents on Population Growth and Spread of Melaleuca quinquenervia." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/406.

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The main goal of this study was to evaluate the effectiveness of two biological control agents in reducing population growth and spread of the invasive tree Melaleuca quinquenervia, a subtropical tree native to Australia, and invasive in Florida, Puerto Rico, and the Bahamas. While in Florida two insects Oxyops vitiosa (weevil), and Boreioglycaspis melaleucae (psyllid) have been established as biocontrol agents, in Puerto Rico only psyllids are present, and in the Bahamas no biocontrol agents are present. This study combined demographic data, experiments and mathematical models to investigate

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Churchill, Christopher J. "Population Dynamics of Zebra Mussels (Dreissena Polymorpha) in a North Texas Reservoir: Implications for Invasions in the Southern United States." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc407755/.

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This dissertation has two main objectives: first, quantify the effects of environmental conditions on spatio-temporal spawning and larval dynamics of zebra mussels (Dreissena polymorpha [Pallas 1771]) in Lake Texoma, and second, quantify the effects of environmental conditions on survival, growth, and reproduction of young of the year (YOY) juvenile zebra mussels. These biological responses directly influence population establishment success and invasive spread dynamics. Reproductive output of the zebra mussel population in Lake Texoma was significantly related to water temperature and lake el

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Buru, Joshua Comrade. "Comparative biology of two forms of an invasive vine, Dolichandra unguis-cati (L.) Lohmann (Bignoniaceae): implications for weed spread and biocontrol." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/102084/1/Joshua%20Comrade_Buru_Thesis.pdf.

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This thesis is a comparative study of two distinct forms ('long pod' and 'short pod') of an invasive vine, cat’s claw creeper. The two forms have differing prevalence rates in Australia. The thesis examines important plant traits that could explain this variation in prevalence between the forms. The thesis covers seed biology, anatomical and growth traits, together with physiological traits in response to two levels of light, water and nutrients resources. In addition, the study assesses preferences of two bio-agents (insects) against the two forms of cat’s claw creeper to ascertain bio-contro

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Gravuer, Kelly. "Determinants of the introduction, naturalisation, and spread of Trifolium species in New Zealand." Master's thesis, Lincoln University. Bio-Protection and Ecology Division, 2004. http://theses.lincoln.ac.nz/public/adt-NZLIU20071015.060329/.

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Two conceptual approaches which offer promise for improved understanding of biological invasions are conceptualizing the invasion process as a series of distinct stages and explicitly incorporating human actions into analyses. This study explores the utility of these approaches for understanding the invasion of Trifolium (true clover) species in New Zealand. From the published literature, I collected a range of Trifolium species attributes, including aspects of global transport and use by humans, opportunistic association with humans in New Zealand, native range attributes, habitat character

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