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Dissertations / Theses on the topic 'Invasive Alien Species'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

CHINCHIO, ELEONORA. "DISEASE RISK ASSESSMENT OF INVASIVE ALIEN SPECIES." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/821735.

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Increased global trade and travel have led to a rise in the number of invasive alien species (IAS), i.e. species introduced by humans in geographic areas where are not naturally found, worldwide. Despite the recognized role of wildlife, as well as of wildlife translocations, in the emergence and re-emergence of infections of public health significance, IAS remain mainly studied for their environmental impacts, and their disease risk towards humans and animals is still largely neglected by health professionals. The main aim of this thesis is therefore to cover this gap by setting the ground

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2

Theile, H. Lenore. "Invasion of contrasting ecosystems by alien plant species /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18380.pdf.

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CHATZIDIMITRIOU, EVANGELIA. "Alien Invasive Species in Europe: Three Case Studies." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3427137.

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The incidental introduction of alien phytophagous insects and mites has become quite a common event in the world owing to intensive commercial exchanges of plants and goods and ever-increasing tourist traffic. There is evidence that this phenomenon is increasing, in spite of the control measures of the EU phytosanitary system in order to minimize unintentional introductions. The introduction of an alien species in a new ecosystem and the interaction between an alien species and the autochthonous species usually has many disadvantages. The alien species can dominate the invaded ecosystems and

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4

Dutrieux, Mariane. "Spatio-temporal species distribution modeling: Application to invasive alien species’ monitoring." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-224319.

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The developments of species distribution modeling techniques have brought new opportunities in the field of biological invasion management. In particular, statistical niche modeling for spatio-temporal predictions of species’ distribution is a widely spread tool that has proved its efficiency. The main purpose of this Master thesis is to study applicability of species distribution modeling to invasive alien species, with the aim of supporting efficient decision-making for their prevention. Some research questions are: how useful can species distribution modeling be for invasives’ prevention? I

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Smith, Ross L. "Invasive alien plant species of The Bahamas and biodiversity management." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1275062320.

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FALASCHI, MATTIA. "INTERACTIVE EFFECTS OF HABITAT MODIFICATION AND INVASIVE ALIEN SPECIES ON AMPHIBIAN BIODIVERSITY." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/822579.

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The biodiversity of our planet is facing a severe crisis. Habitat alteration, climate change, the spread of alien species, and overexploitation are major drivers of biodiversity loss. These global change drivers often act jointly or even synergistically on population declines. To identify priorities for conservation, it is thus essential to compare the relative impact of different threats on biodiversity. Amphibians are the vertebrates showing both the largest proportion of threatened species and the highest rate of decline. Out of the ~6,800 amphibian species assessed by the IUCN, more than 4

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Smith, Owen Peter. "Allelopathic potential of the invasive alien Himalayan balsam (Impatiens glandulifera Royle)." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/1592.

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Investigations were carried out into the allelopathic potential of the invasive alien annual Himalayan Balsam (Impatiens glandulifera Royle) using a series of bioassays, including ones developed or adapted for this study. They were evaluated for their suitability to detect three of the four main modes of allelochemical release, namely leaching, exudation and decomposition. Assays which involved the measurement of lettuce radicles and hypocotyls gave reliable results and allowed a range of different Impatiens material, both living and dead, to be assessed and ranked according to the allelopathi

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Phillips, Ben Lee. "Evolution and impact of invasive species : cane toads and snakes in Australia." University of Sydney. School of Biological Sciences, 2004. http://hdl.handle.net/2123/611.

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Evolution can occur rapidly, along timescales that are traditionally regarded as 'ecological'. Despite growing acceptance among biologists of rapid evolution, a strong paradigm of contemporary evolution is still absent in many sub-disciplines. Here I apply a contemporary evolution viewpoint to conservation biology. Specifically, I examine the impact of cane toads (Bufo marinus) on Australian snakes. Toads were introduced into Australia in 1935, have spread rapidly and represent a novel, extremely toxic prey item to na�ve Australian predators (including snakes). Based on dietary preference

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Riley, Sophie Law Faculty of Law UNSW. "Invasive alien species and the protection of biodiversity: the role of quarantine laws in resolving inadequacies in the international legal regime." Publisher:University of New South Wales. Law, 2008. http://handle.unsw.edu.au/1959.4/41301.

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The problem of invasive alien species (IAS) is recognized as the second most serious threat to loss of biodiversity after habitat destruction. It is a problem largely created by humans as they transport and introduce species, deliberately and accidentally, from one part of the globe to another. The pressures exerted on biodiversity by international trade are one of the most serious aspects of the IAS problem. Although states are under obligations in international environmental law to prevent the entry of, and control, those alien species that threaten biodiversity, to date state practice has o

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10

Jurk, Clova. "Fouled yachts : a vector for marine invasive alien species to South African shores?" Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11045.

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Biofouling on recreational yachts is an important vector for marine invasive alien species (MIAS) in many countries. There are various characteristics of a vessel that make it more susceptible to hull fouling. Yachts in three Western Cape marinas were surveyed to assess extent of fouling, hull maintenance patterns, travel history and yacht-owner awareness of MIAS issues.

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Yapi, Thozamile Steve. "An assessment of the impacts of invasive Australian wattle species on grazing provision and livestock production in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/95455.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: I investigated the impacts of the invasive wattle species (Acacia mearnsii, A. dealbata, A. decurrens), on the ecological function and productivity of rangelands in South Africa and their ability to sustain livestock production. More specifically, this study set out to: (1) assess grazing areas at a national scale; (2) identify evidence of progressive impacts of these species on livestock production across a selection of magisterial districts; (3) determine the effects of A. mearnsii density on growth form dominance of indigenou

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Holmes, P. M. "A comparative study of the seed bank dynamics of two congeneric alien invasive species." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/17724.

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Includes bibliographies.<br>The unique vegetation in the lowlands of the fynbos biome is threatened by alien Acacia encroachment. The seed bank dynamics of the two most widespread invaders in the region, Acacia saligma and A. cyclops, was studied to elucidate those factors contributing most to their invasive success. This information was then used to assist in developing optimal control methods. On the basis of information available prior to this study, it was predicted that both species would have large, persistent seed banks in the so.il, and that seed bank processes would provide the - key

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Ramaswiela, Tshililo. "The spatial distribution of alien and invasive vascular plant species on sub-Antarctic Marion Island." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/5471.

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Thesis (MSc )--Stellenbosch University, 2010.<br>ENGLISH ABSTRACT: The patterns of spread of non-indigenous species and the factors influencing their distribution have been studied infrequently on Southern Ocean Islands, where the prevention and control of biological invasions is a priority for conservation management. Owing to its remoteness and relatively small size, sub-Antarctic Marion Island provides an ideal opportunity to investigate the patterns of spread of invasive species and the factors likely influencing the distribution of alien species. Therefore, this study provides a spat

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PETRUZZELLIS, FRANCESCO. "Functional traits as a tool to predict invasive potential of alien species in native communities." Doctoral thesis, Università degli Studi di Trieste, 2019. http://hdl.handle.net/11368/2962384.

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Le specie aliene invasive (IAS) si stanno diffondendo a velocità sempre più elevata, con effetti molto negative a livello degli ecosistemi. Infatti, le IAS sono considerate una della maggiori cause della perdita di biodiversità e semplificazione degli habitat a livello globale. Di conseguenza, uno dei più grandi obiettivi in campo ecologico è quello di evidenziare le caratteristiche che ne favoriscono la diffusione. Quest’ ultime sono generalmente descritte dai ‘tratti funzionali’, definiti come caratteristiche morfologiche, fisiologiche o fenologiche, misurabili in un individuo dal livello ce

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15

Pattison, Zarah. "Effects of invasive alien plants on riparian vegetation and their response to environmental factors." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/25404.

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Biological invasions are reportedly one of the major contributory factors to biodiversity loss worldwide. The impacts of invasive alien plant (IAP) species on native communities are widely documented in the scientific literature, however, there is still a lack of detailed information on their impacts within the most vulnerable habitats. Riparian habitats are highly dynamic systems and naturally disturbed, making them particularly vulnerable to invasion. Climate change, directly or indirectly, is also predicted to adversely impact river systems, which may subsequently alter invasion rates and t

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Richards, Jeannine Hyde. "From 'useful and interesting' to 'evil invaders': evolving perceptions of non-native species in the United States." Thesis, Boston University, 2002. https://hdl.handle.net/2144/27749.

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Boston University. University Professors Program Senior theses.<br>PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>2031-01-02

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Phiri, E. E. "Species occupancy, distribution and abundance : indigenous and alien invasive vascular plants on sub-Antarctic Marion Island." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/47001.

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Thesis (MSc)--Stellenbosch University, 2008.<br>ENGLISH ABSTRACT: Macroecological relationships have rarely been studied at wide spatial scales and across geographic ranges of species in the field in the sub-Antarctic. In this thesis I examined the occupancy, distribution and abundance, and the relationships thereof, of indigenous plants and alien species at broad (island-wide) and fine scales across sub-Antarctic Marion Island. The impacts of alien species and their interactions with indigenous plants were also investigated. I examined the nature of the abundance structure of a cushion-formi

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18

Richards, Michael Bruce. "Host specificity in the Rhizobium symbioses of two Aspalathus species and an invasive alien legume, Acacia saligna." Bachelor's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/25788.

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The symbiotic specificity of Aspalathus capensis and A. carnosa in relation to their geographical distribution, was investigated by growing plants in soil and in tubes containing soil solutions plus nitrogen-free nutrient solutions. Soila were collected from three sites within their distribution and two from 90km outside. Both species formed nodules in all three soils from within their distribution and A. capensis in one from outside. A. carnosa did not survive in tube culture. The possible role of hostspecificity in the distribution of A. capensis and A. carnosa is discussed. A wide

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Ewald, Michael [Verfasser], and S. [Akademischer Betreuer] Schmidtlein. "Remote Sensing of the Ecosystem Impact of Invasive Alien Plant Species / Michael Wolfgang Ewald ; Betreuer: S. Schmidtlein." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1206646918/34.

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Ewald, Michael Wolfgang [Verfasser], and S. [Akademischer Betreuer] Schmidtlein. "Remote Sensing of the Ecosystem Impact of Invasive Alien Plant Species / Michael Wolfgang Ewald ; Betreuer: S. Schmidtlein." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1206646918/34.

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21

Forsyth, Aurelia Therese. "Identifying and mapping invasive alien plant individuals and stands from aerial photography and satellite images in the central Hawequa conservation area." University of the Western Cape, 2012. http://hdl.handle.net/11394/5118.

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>Magister Scientiae - MSc<br>The Cape Floristic Region, situated at the southern tip of Africa, is one of the world’s most botanically diverse regions. The biodiversity of this region faces various types of threats, which can be divided into three main categories, namely increasing urbanisation, agriculture expansion, and the spread of invasive alien vegetation. It has been shown that botanically diverse areas are more prone to invasion by invasive alien plant (IAP) species. The Hawequa conservation area, in the south-western Cape, is particularly botanically diverse, such that it is very pron

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Selge, Sebastian. "Public and scientific discourses on biological invasions : social representations of invasive non-native species in Scotland." Thesis, University of Aberdeen, 2011. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=183833.

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Invasive non-native species are believed to be one of the biggest threats to biodiversity. Until now biological invasions have been mainly studied from a biological perspective and much research has been undertaken to investigate species’ ecology and potential options for management. Comparatively little attention has been devoted to questions regarding the social construction of the issue. This is despite invasion biologists increasingly acknowledging the fundamental importance of human perceptions, beliefs, attitudes and values inherent in debates about invasive non-native species. This thes

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Ahimbisibwe, Beine Peter. "A socio-economic assessment of the impacts of invasive alien plant species on forestry production the case of Senna spectabilis in Budongo forest reserve, Uganda /." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-11302009-210738/.

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Smith, Jennifer E. "Factors influencing algal blooms on tropical reefs with an emphasis on herbivory, nutrients and invasive species." Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=765084721&SrchMode=1&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233266647&clientId=23440.

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Naicker, Isayvani. "The role of science in issue advocacy : invasive alien plant species in the fynbos vegetation of South Africa." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610726.

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Piccoli, Stefano <1995&gt. "Spatial patterns and drivers of three invasive alien plant species in coastal dunes of the North Adriatic coast." Master's Degree Thesis, Università Ca' Foscari Venezia, 2019. http://hdl.handle.net/10579/16110.

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L’invasione di specie aliene è considerata una delle cause più importanti di perdita della biodiversità. Le specie aliene vengono trasportate accidentalmente dall'uomo verso nuovi habitat, dove si insediano e si riproducono adattandosi alle nuove condizioni ambientali. Questo studio mira ad analizzare i principali fattori che influenzano la distribuzione spaziale di tre specie aliene, utilizzando transetti lineari paralleli alla costa e perpendicolari ai sentieri di accesso alla spiaggia. Sono stati inclusi fattori biotici (specie native), abiotici (morfologia dell’area) e antropici (vicinanza

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Svensson, Elin, and Karin Wetterberg. "En ny däggdjursart i Sveriges fauna : Etablering av stenmård (Martes foina) i nordöstra Skåne." Thesis, Högskolan Kristianstad, Fakulteten för naturvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-22586.

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Skogsmård (Martes martes) har länge varit Sveriges enda mårdart men 2018 gjordes det första fyndet av en annan art, stenmård (Martes foina), i nordöstra Skåne. Efter att detta fynd uppmärksammats fick Invasiva Arter på Svenska Jägareförbundet in uppgifter om ytterligare tre fynd från området. Syftet med studien var således att undersöka om stenmård är en etablerad art i nordöstra Skåne samt att undersöka om det finns släktskap mellan de funna individerna. Utifrån tidigare fyra fynd utfördes en fältstudie för att försöka samla in ytterligare fynd av stenmård i nordöstra Skåne, med hjälp av fäll

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Lemke, Dawn. "Alien plants and their invasion of the forested landscape of the southeastern United States." Thesis, University of Canterbury. Department of Mathematics and Statistics, 2012. http://hdl.handle.net/10092/7107.

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In this thesis, I have assessed and modelled invasion of alien plant species in the forest of the southeastern United States. There are over 380 recognized invasive plants in southeastern forests and grasslands with 53 ranked as high-to-medium risk to natural communities. I have focused on ten of these: Chinese lespedeza, tall fescue, Japanese honeysuckle, Chinese privet, autumn olive, princesstree, silktree, chinaberry, tree of heaven, tallowtree. Assessing them at differing scales, locally (Chapter 2 and 3), eco-regionally (Chapter 4 and 5) and regionally (Chapters 6 and 7), using field base

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Dixon, Gemma Michelle. "Allelopathic potential of the alien invader weed Campuloclinium macrocephalum(Less) D.C." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-10052009-111802/.

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Lewis, Glennis M. "Protecting Canada's natural ecosystems from invasive alien plant species: Is sub-national weed control legislation up to the task?" Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27388.

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Invasive alien plant species pose a serious threat to Canada's natural ecosystems. It is the thesis of this paper that sub-national laws are important tools in combatting such species that are naturalized and spreading within provincial and territorial boundaries. Weed control acts in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, Nova Scotia, and Prince Edward Island and the plant health protection acts in New Brunswick, and Newfoundland and Labrador are a strong basis to combat invasive alien plant species. However, since these laws were enacted for weeds in agro-ecosyst

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Engledow, Henry Riley. "The effect of four invasive alien species on various soil factors and immediate post-fire vegetation - in mountain fynbos." Thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/26100.

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Johansson, Oskar. "Invasiva främmande arter: försiktighetsprincipen som förutsättning för effektiva åtgärder." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74632.

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Biological diversity is an essential prerequisite for life on earth and for the function of its ecosystems. Without biological diversity the ecosystems will eventually collapse, and it is thus necessary to maintain a healthy level of variation at ecological-, species- and genetic- level. Invasive alien species (IAS) are now recognized as the second highest threat to biological diversity. As a result, new legislation aiming to counteract the increasing issues with IAS are introduced e.g. in the EU. The purpose of this essay is to evaluate the function and importance of the precautionary princip

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Hansen, Simone. "How flower visitation of remnant grassland patches is affected by commercial timber plantations and an invasive alien species (Rubus cuneifolius)." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/98051.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Our planet is in the midst of a biodiversity crisis, with factors such as land transformation, climate change, anthropomorphic disturbance and invasive species acting together to threaten biodiversity. In South Africa, with minimal natural wood resources, commercial forestry is one of the most abundant forms of landscape transformation. However, a third of the land inside many plantations has been set aside for conservation as unplanted remnant grassland patches (RGPs). These areas are subjected to an additional negative im

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Viljoen, Morné. "A critical review of the South African freshwater angling legislative framework / Morné Viljoen." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4235.

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Prior to 1993, freshwater angling in South Africa had been governed by the respective nature conservation legislation of the four South African provinces, the four “independent homelands" and the six so-called Bantustans. In 1993 a South Africa with nine provinces was created, of which only Limpopo and Mpumalanga promulgated its own laws governing freshwater angling. From 2008 angling for listed threatened and protected freshwater fish species has been regulated by the National Environmental Management: Biodiversity Act, supplemented by the Threatened or Protected Species Regulations. In addit

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Atsame-Edd, Angeline. "Regeneration dynamics of natural forest species within a stand of the invasive alien Acacia mearnsii along the Buffeljagsrivier, Swellendam, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86642.

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Thesis (MScFor)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Several studies have shown that stands of invasive alien plants in the natural forest environment can facilitate the rehabilitation and recovery of such forests and challenged the general and global perception that such invasive species threaten the biodiversity and functioning of natural vegetation systems. The aim of this study was to develop an understanding of the dynamics of the spread and establishment of natural forest species in a large stand of the invasive alien plant species Acacia mearnsii (Black wattle) alon

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Mtengwana, Bhongolethu. "Spatial modelling of invasive species distribution in water-limited environments using remotely sensed data and climatic scenarios in the Heuningnes catchment, South Africa." University of Western Cape, 2020. http://hdl.handle.net/11394/7395.

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>Magister Scientiae - MSc<br>The occurrence and spread of Invasive Alien Plants (IAPs) is a threat to global water resources and natural ecosystems due to high water use rates. With the current climate change projections and their ability to survive extreme environmental conditions, these species pose a huge threat to grazing resources, water availability and ecosystems in general. Routine monitoring and understanding their distribution and potential vulnerable areas is fundamental as it provides the requisite baseline information to guide clearing efforts and other related management and reha

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Pereira, Daniel Gomes. "Densidade, genética e saúde populacional como ferramentas para propor um plano de controle e erradicação de invasão biológica: o caso de Callithrix aurita (Primates) no Parque Nacional da Serra dos Órgãos, RJ, Brasil." Universidade do Estado do Rio de Janeiro, 2010. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=2381.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A introdução de espécies em locais fora de sua distribuição natural é uma preocupação importante na conservação da biodiversidade. A espécie Callithrix aurita é endêmica das regiões de floresta de altitude da Mata Atlântica do Sudeste do Brasil. Os critérios mais relevantes que a enquadram como espécie ameaçada de extinção são: destruição do habitat, incapacidade de adaptação a florestas secundárias degradadas, declínio populacional, distribuição restrita e introdução de espécies exóticas invasoras. Estes critérios, aliados à evide

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Bereng, Mosiuoa Walter. "Understanding environmental factors influencing invasion of Lilium formosanum in Mpumalanga Province and models of its potential distribution in South Africa." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/79711.

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Alien invasive plants are of concern in the world because of their potential to spread into the natural environment. Invasion patterns observed in plant species can be attributed among other things to favourable environmental conditions. Understanding invasion dynamics of alien invasive plants can help in timely intervention initiatives. In Mpumalanga, Lilium formosanum (Liliaceae) appears to be an emerging plant invader and is spreading in the natural environment. The study investigated the invasion extent and predictor variables which could explain abundance patterns of L. formosanum in the

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Comont, Richard Francis. "Modelling the impact of an alien invasion : Harmonia axyridis in Britain." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:08de972b-1c12-4862-bb7d-95d614a9e011.

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Harmonia axyridis is a ladybird native to Asia, but introduced widely as a biocontrol agent. It is invasive and detrimental to native species in North America, which meant its arrival in Britain was met with concern. Establishment was seen as an opportunity to track the spread of an invasive alien species (IAS) whilst also monitoring impacts on native species. The aims of this thesis were to examine the responses of native British ladybirds to the arrival of H. axyridis, to establish the effect of the IAS on native ladybirds when compared to other drivers, and to investigate the possible facil

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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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Nghidinwa, Kirsti C. "Why are some species invasive? : determining the importance of species traits across three invasion stages and enemy release of southern African native plants in New Zealand." Lincoln University, 2009. http://hdl.handle.net/10182/1438.

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There are many factors that have been proposed to contribute to plant invasiveness in nonnative ecosystems. Traits of invading species are one of them. It has been proposed that successful species at a certain invasion stage share particular traits, which could be used to predict the behaviour of potentially invasive plants at the respective stage. Three main stages of invasion are distinguished: introduction, naturalization, and invasion. I conducted a stageand trait-based analysis of available data for the invasion of New Zealand by the flora of southern Africa. Using 3076 southern African n

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Marire, Juniours. "Institutional change, institutional isolation and biodiversity governance in South Africa: a case study of the trout industry in alien and invasive species regulatory reforms." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/639.

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The world, in recent decades, has witnessed an incalculable surge in global “wicked” policy problems that have long-term, and most often irreversible, impacts, not least terrorism, climate change, biodiversity losses and desertification. Wicked problems are wicked because there is no single epistemological system that can adequately coordinate policy action for addressing them. Literature abounds with international case studies of opposition to national institutions that are designed to put into effect global and regional policies for resolving wicked problems. This raises questions about what

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Richards, Michael Bruce. "Seed biology of a recently introduced species, Myoporum laetum in comparison to a successful invasive alien, Acacia cyclops, in the southwestern Cape, South Africa." Bachelor's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/26134.

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The invasive potential of Myoporum laetum, a tree recently introduced into the southwestern Cape, South Africa, was evaluated, by comparing various aspects of its seed biology with those of another bird-dispersed alien, Acacia cyclops which is a successful invader in this region. M. laetum has higher annual seed production, but lower soil-stored seed banks than A. cyclops. Both experience high seed predation, especially under parent canopies. M. laetum has a more persistant seed store and is able to germinate and establish in shade. Germination of untreated A. cyclops seeds was 23.3% and this

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Crous, Casparus Johannes. "Vulnerability of selected native and invasive woody species to streamflow variability in Western Cape fynbos riparian ecotones." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4203.

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Thesis (MScConsEcol (Conservation Ecology and Entomology))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Riparian ecosystems of the Mediterranean south-western Cape region are projected to experience significant decreases in streamflow due to climate change and increased demands for water associated with human demographic trends and increasing living standards. Aggravating this problem are woody invasive alien plants, such as Acacia mearnsii, whose impacts, including those on catchment water yields, have justified extensive eradication programmes such as Working for Water (WfW).

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Ruwanza, Sheunesu. "Opportunities and contraints in the restoration of riparian ecosystems invaded by alien trees : insights from the Western Cape, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71755.

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Thesis (PhD)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Invasive alien species are widely considered to be the second most significant threat to biodiversity globally following direct habitat destruction. The invasion of riparian systems worldwide by alien plants has contributed to profound changes in biodiversity and ecosystem functioning. In South Africa, river banks and river beds are amongst the most severely invaded landscapes, with the most damaging invaders, especially in the Fynbos Biome, being trees and shrubs of the Australian genera Acacia and Eucalyptus. Although large-sc

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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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Melo, Jessica Ramos. "Comércio de répteis exóticos: as suas implicações para a conservação da natureza." Master's thesis, Universidade de Évora, 2016. http://hdl.handle.net/10174/18610.

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O comércio de espécies selvagens tem crescido bastante ao longo das últimas décadas. Atualmente é considerado o quarto maior tráfico ilegal no mundo, logo seguido da transação de drogas, de armas e de humanos. Estima-se que o comércio de espécies selvagens pode ultrapassar os 12 milhões de euros por ano na UE. Abrange tanto as plantas como os animais vivos; mas, nestes últimos, incluem-se também os seus derivados, tais como sejam as peles, os ossos, alimento, entre outros. O uso das espécies selvagens é bastante vastos, as espécies são utilizadas para alimentação, uso medicinal, investigação c

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Van, Der Colff Dewidine. "Plant stress and the prevalence of pests and pathogens associated with a native and an invasive alien legume tree in the Cape Floristic Region, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86322.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Invasive alien plant species have devastating effects on the environments that they invade. Australian Acacias, a group of plants that has been planted globally for a range of uses, but has escape plantation areas and became invasive in many countries, are particularly problematic. Acacia mearnsii is one of these invasive alien plant species and in South Africa it is also an important forestry species. It is currently the fifth most widespread invasive alien plant in South Africa, only restricted by the very arid Karoo, thus it

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Niklasson, Kajsa. "Parkslide : - från främmande invasiv växt till samhällelig resurs?" Thesis, Högskolan i Gävle, Avdelningen för industriell ekonomi, industridesign och maskinteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36358.

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Parkslide är en främmande invasiv växt som ohämmat sprider sig på bekostnad av närliggande vegetation och den biologiska mångfalden. Genom att undersöka möjligheten att ta vara på Parkslides egenskaper och skapa någonting användbart för vårt samhälle, utan negativ påverkan på människa, djur och framtid, så kan det i sin tur skapa en möjlighet för en hållbar utveckling. Ett annat sätt att se på befintligt råmaterial, som en del i en cirkulär ekonomi. Rapporten diskuterar resurs och värde med intention att minska användandet av nya material och byta ut dessa till mer

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Boldo, Elton Leonardo. "Avaliação de técnicas de sensoriamento remoto no mapeamento da distribuição da espécie arbórea invasora ligustrum lucidum wt aiton no sul do bioma Mata Atlântica." Universidade do Vale do Rio dos Sinos, 2015. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4953.

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Submitted by Silvana Teresinha Dornelles Studzinski (sstudzinski) on 2015-11-23T17:44:03Z No. of bitstreams: 1 Elton Leonardo Boldo_.pdf: 23727744 bytes, checksum: b76b1c83d919f5fca18fe260c647abcb (MD5)<br>Made available in DSpace on 2015-11-23T17:44:03Z (GMT). No. of bitstreams: 1 Elton Leonardo Boldo_.pdf: 23727744 bytes, checksum: b76b1c83d919f5fca18fe260c647abcb (MD5) Previous issue date: 2015-07-30<br>Nenhuma<br>Definir técnicas com acurácia para mapear a ocorrência de espécies invasoras facilita a compreensão de sua ocorrência, dominância e habitats preferenciais. Produzir mapas de

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