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Dissertations / Theses on the topic 'Weed invasion'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

Gosper, Carl R. "Consequences of weed invasion and control on plant-bird interactions and bird communities." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20050221.155953/index.html.

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2

Siderov, Kris, and kris siderov@rmit edu au. "An investigation of the invasion dynamics of Asparagus asparagoides at the habitat level using spatial analytical techniques." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061010.095929.

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This thesis reports on research that examines the early stage invasion process of Asparagus asparagoides (L.) W. Wight (bridal creeper), primarily a bird-dispersed weed, in a remnant vegetation patch. The study site is on Phillip Island, approximately 100 kilometres south east of Melbourne, Victoria. Asparagus asparagoides invasion of the remnant vegetation reserve is a relatively recent phenomenon. Landscape elements that affect bird dispersal and vegetation types that affect seedling establishment may be important factors that limit or enhance the spread of A. asparagoides. A s

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3

Carruthers, Sandy. "The effects of weed invasion on native plants communities : a case study of the creekbank vegetation communities of Morialta Conservation Park /." Title page, contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09AR/09arc319.pdf.

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4

Rounsaville, Todd J. "INVASION DYNAMICS OF THE EXOTIC LIANA EUONYMUS FORTUNEI (TURCZ.) HAND.-MAZZ. (WINTERCREEPER)." UKnowledge, 2017. http://uknowledge.uky.edu/biology_etds/40.

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Elevated atmospheric CO2 has been implicated as a driver of increased liana abundance worldwide. Known as disturbance creators and beneficiaries, lianas possess the potential to significantly influence forest ecosystems. I investigated the early-invasion dynamics of Euonymus fortunei (wintercreeper), an evergreen liana that is invading forests in eastern North America, disrupting native plant communities and ecosystem functions. Wintercreeper is widely cultivated as an ornamental groundcover, frequently invading natural areas via asexual stem growth. Invasion of remote natural areas is depende

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5

Dunlop, Elizabeth A. "Mapping and modelling the invasion dynamics of Senna obtusifolia at different levels of scale in Australia." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16490/1/Elizabeth_Dunlop_Thesis.pdf.

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The invasion of natural environments by alien species is a significant threat to the ecological integrity of these systems. Senna obtusifolia is an aggressive invasive weed recently introduced to Australia that is having significant impacts on grassland ecosystems on the Cape York Peninsula. Currently the species is inadequately managed and so range expansion continues. The invasion potential of S. obtusifolia in Australia remains unknown, as does much about its behaviour and management in natural systems. This project undertakes extensive mapping and modelling of the current and future distri

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6

Dunlop, Elizabeth A. "Mapping and modelling the invasion dynamics of Senna obtusifolia at different levels of scale in Australia." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16490/.

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The invasion of natural environments by alien species is a significant threat to the ecological integrity of these systems. Senna obtusifolia is an aggressive invasive weed recently introduced to Australia that is having significant impacts on grassland ecosystems on the Cape York Peninsula. Currently the species is inadequately managed and so range expansion continues. The invasion potential of S. obtusifolia in Australia remains unknown, as does much about its behaviour and management in natural systems. This project undertakes extensive mapping and modelling of the current and future distri

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7

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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8

Liutkus, Dainius. "Ilgalaikio skirtingo intensyvumo žemės dirbimo poveikis miežių agrocenozei taikant intensyvias technologijas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130621_111609-10533.

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Agronomijos studijų programos magistro baigiamasis darbas 40 puslapių, 10 paveikslų, 2 lentelės, lietuvių kalba. Tyrimo objektas: paprastojo miežio (Hordeum vulgare L.) vasarinės veislės ,,Simba'' agrocenozė. Tyrimo tikslas: Įvertinti ilgalaikio skirtingo intensyvumo žemės dirbimo poveikį miežių agrocenozei, taikant intensyvias technologijas. Tyrimo uždaviniai: 1. Apžvelgti mokslinę literatūrą ir atlikti sisteminę analizę tiriamuoju klausimu. 2. Aprašyti atlikto eksperimento vykdymo sąlygas ir metodus. 3. Tyrimais nustatyti ir įvertinti ilgalaikio skirtingo intensyvumo žemės dirbimo poveikį

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9

Babin, Courtney H. "Size-dependent patterns of reproductive investment in the North American invasive plant species Triadica sebifera (L.) Small (Euphorbiaceae)." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2295.

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Knowledge of sex allocation trade-offs with tree growth in insect-pollinated woody plants is limited, particularly in invasive plants. This study examined patterns of growth and reproductive investment in a North American invasive plant species, Triadica sebifera, I hypothesized that the energy limitations of smaller trees may result in the production of more male reproductive structures that are energetically less costly. Diameter at breast height was a significant predictor of seed and catkin mass and regression can describe these relationships across sites. Seed and catkin mass were positiv

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10

Lucero, Jacob Elias. "Cheatgrass (Bromus tectorum), Native Grasses, and Small Mammals in the Great Basin: a Test of the Apparent Competition Hypothesis Facilitated by a Novel Method of Decanting Seeds from a Flotation Solution." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3405.

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The effect of shared enemies between invasive and native species has been argued to facilitate biological invasions (i.e., the apparent competition hypothesis or ACH). This study investigated a previously untested possibility: whether granivorous small mammals facilitate cheatgrass (Bromus tectorum) invasion by driving food-mediated apparent competition between cheatgrass and native grasses. Specifically, we tested three predictions that must be true if such apparent competition occurs. First, cheatgrass invasion augments total seeds available to granivorous small mammals. Second, density of g

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11

Crider, Kimberly Kay. "BIOLOGICAL CONTROL: EFFECTS OF TYRIA JACOBAEAE ON THE POPULATION DYNAMICS OF SENECIO JACOBAEA IN NORTHWEST MONTANA." The University of Montana, 2010. http://etd.lib.umt.edu/theses/available/etd-03092010-140634/.

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<p>Biological control, using introduced, specialist insects is a common strategy for controlling plant invasions. However, the efficacy of biological control agents in controlling their host plants is rarely quantified population level. I quantified the impact of a specialist biological control agent, the cinnabar moth <i>(Tyria jacobaeae)</i> on its host plant, tansy ragwort <i>(Senecio jacobaea)</i> in northwest Montana. Cinnabar moth damage and its effects on important plant vital rates were tested with and without specialist herbivores. The presence of moth larvae corresponded to a reducti

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12

Norton, Eric. "Camelthorn: A Homeowners Guide." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/144799.

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2 pp.<br>Camelthorn is an invasive weed classified as a noxious weed in Arizona. The weed has the potential to cause serious damage for private landowners and their property. This fact sheet provides the means for landowners to identify and take steps to control and eliminate this weed.

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13

Mastalerz, Allison. "The role of ornamental gardening in forest plant invasions across an urban-rural gradient in Southwestern Ohio." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1377866412.

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14

Howery, Larry D., Ed Northam, Walt Meyer, Jennifer Arnold, Emilio Carrillo, Kristen Egen, and Mary Hershdorfer. "Non-Native Invasive Plants of Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 2016. http://hdl.handle.net/10150/625545.

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84 pp. / First Edition Published 2001<br>The noxious weed problem in the western United States has been described as, a biological forest fire racing beyond control because no one wants to be fire boss. Indeed, when small weed infestations are left unchecked, they can grow exponentially and spread across the land much like a slow-moving biological wildfire. However, land consumed by fire usually recovers and is often more productive than before the fire occurred. On the other hand, land consumed by noxious weeds may be irreversibly changed and never again reach its full biological potential.

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15

Hansen, Steen Ole. "Interactions between the invasive weed Heracleum mantegazzianum and associated insects /." [S.l.] : [s.n.], 2005. http://www.zb.unibe.ch/download/eldiss/05hansen_so.pdf.

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16

Christensen, Stephanie. "Establishing Weed Prevention Areas and evaluating Their Impact." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/851.

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The spread of invasive weeds continues to be a serious economic and environmental threat. Weed prevention has the potential to stop weeds before they become well established in an area conserving time, energy, and resources. Unfortunately, weed prevention is often overlooked. Weed Prevention Areas (WPAs) are a relatively new tool developed to help improve the application of weed prevention. They are cooperatively managed areas that focus on implementing prevention and early detection strategies at a community level. The purpose of this research was to establish baseline data that will be

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17

Davis, Philip Browning. "The invasion potential and competitive ability of Camelina sativa (L.) Crantz (camelina) in rangeland ecosystems." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/davis/DavisP0510.pdf.

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Camelina sativa (L.) Crantz (large-seeded false-flax) is a recently introduced oilseed crop in Montana and has potential for large scale production for the biofuel market. However, due to weedy characteristics, the invasive potential of this species is of concern. A need exists to create a pre-entry protocol to accurately assess risk to minimize uncertainty inherent in qualitative weed risk assessment approaches. We assessed the probability of C. sativa to invade rangeland ecosystems of southwest Montana to address this concern. The objectives of this study were to 1) quantitatively assess the

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18

Bell, Graeme Douglas Milton. "Regulation of gene expression in invasive and non-invasive Compositae weeds." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/26226.

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Gene expression divergence between populations has been linked to adaptive morphological evolution and is thought to be a factor in the invasive success of certain weedy plants. Understanding the genetic basis of these regulatory changes can identify genes that have been under selection during adaptation to a new environment or new species interactions. A high-throughput sequencing approach was used to study the regulatory basis (cis and/or trans) of gene expression differences between native and invasive populations of Cirsium arvense (Canada thistle) by exploring patterns of differential g

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19

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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20

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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21

Brock, Marcus T. "Invasion of high alpine ecocystems by the exotic dandelion Taraxacum officinale (Asteraceae) /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3115529.

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22

Meffin, Ross. "Invasion success and impacts of Hieracium lepidulum in a New Zealand tussock grassland and montane forest." Lincoln University, 2010. http://hdl.handle.net/10182/1808.

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Invasive species represent a major concern; they can result in serious ecological and economic losses and are recognised as one of the most serious threats to global species diversity. Plant invasions are of particular concern in New Zealand, which has high proportions of both naturalised and endemic plant species. In this thesis I focussed on the invasive plant Hieracium lepidulum, an exotic weed introduced from Europe to New Zealand prior to 1941. It is invasive in a variety of habitats in the South Island, where it has steadily increased in distribution and abundance over the last 50 years

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23

McReynolds, Kim, and Cori Dolan. "Invasive Plants on Small Acreage Properties in Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 2017. http://hdl.handle.net/10150/625562.

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3 pp. / Originally published 01/2010.<br>Invasive plants are plants that have been accidentally or intentionally introduced to an area outside their original range and become problematic in their new environment by interfering with native or desirable species. Landowners can help prevent the spread and assist in controlling these invasive plants. Revised 11/2016. Originally published 01/2010.

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24

Repath, Charles Fitts. "Evaluating and monitoring invasive plant processes." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/repath/RepathC0505.pdf.

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25

Oppermann, Alison. "Introduced plant invasion in small remnants of native vegetation /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09ENV/09envo62.pdf.

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26

Weede, Oliver [Verfasser]. "Wissensbasierte Planung für die minimal-invasive Chirurgie / Oliver Weede." Karlsruhe : KIT Scientific Publishing, 2013. http://www.ksp.kit.edu.

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27

Lopez, Anthony J. "PREDICTING INVASIVE RANGE OF Eucalyptus globulus IN CALIFORNIA." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1517.

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Eucalyptus globulus is the subject of intense debate in California. Its invasive potential, aggressive growth, reproductive biology, and association with fire make the prediction of spread important in California. Two modeling simulations, Climex and Maxent, will illustrate the distribution and potential growth range of E. globulus in California based on climate and presence. Modeling the potential range of growth will predict invasive spread. The anticipated result is the continued spread of E. globulus in coastal regions with adequate moisture and suitable climate. Predicting the range of E.

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28

Boersma, Nicholas Neal. "Natural weed controls potential of the invasive shrub Rhamnus cathartica and improvement of corn gluten meal /." [Ames, Iowa : Iowa State University], 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1481846.

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29

Kasdirin, Hyreil. "Adaptive bio-inspired firefly and invasive weed algorithms for global optimisation with application to engineering problems." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/15905/.

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The focus of the research is to investigate and develop enhanced version of swarm intelligence firefly algorithm and ecology-based invasive weed algorithm to solve global optimisation problems and apply to practical engineering problems. The work presents two adaptive variants of firefly algorithm by introducing spread factor mechanism that exploits the fitness intensity during the search process. The spread factor mechanism is proposed to enhance the adaptive parameter terms of the firefly algorithm. The adaptive algorithms are formulated to avoid premature convergence and better optimum solu

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30

Bentivegna, Diego Javier. "Integrated management of the invasive weed, cut-leaved teasel (Dipsacus laciniatus L.) along a Missouri highways." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5549.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2008.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 22, 2009) Includes bibliographical references.

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31

Burnham, Jeffrey S. "Native Bunchgrass and Invasive Weed Establishment in Low Nutrient Rangeland Soils with Nitrogen and Phosphorus Manipulation." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/793.

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Competition between native perennial grasses and Bromus tectorum has been studied for many years. Recently, soil nutrients have been immobilized in an effort to preferentially inhibit growth of B. tectorum relative to native species. Most of this work has focused on soil N, but interactions with soil P are less studied and may be important as well. Additionally, although competitive effects and nutrient responses of several Centaurea spp. are well documented, data are lacking on the competitive effects that Centaurea virgata exerts on the establishment of native and exotic communities. A fie

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32

Bain, Kandee. "VARIATION BETWEEN PERIPHERAL AND CENTER ACHENE MORPHOLOGY AND ATTRIBUTES OF ACHENE GERMINATION IN THE INVASIVE SPECIES, CENTAUREA MELITENSIS." CSUSB ScholarWorks, 2015. https://scholarworks.lib.csusb.edu/etd/256.

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Invasive species are often successful and problematic because of their ability to persist in disturbed and undisturbed environments despite weed management practices. Understanding reproduction and dispersal strategies in these species can aid in developing management approaches to help control their spread. Centaurea melitensis, a nonnative invasive with European origins, is found in disturbed areas of southern California. It produces three different types of flower heads that develop at different times and at different locations on the plant during the growing season. The chasmogamous (CH) f

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33

Littlefield, Joanne. "Invasive Weeds on Rangeland: Controlling Sweet Resin Bush and Yellow Star-Thistle." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/622248.

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34

Meela, Moraba Macdonald. "Evaluation of alien invasive weedy plants for activity against plant pathogenic fungi." Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/23195.

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Plant fungal pathogens are a major threat to food security worldwide. The most important method of protecting plants against fungal attack is the use of fungicides, but the development of resistance towards synthetic fungicides is of great concern. Moreover, the health risks associated with the use of chemical fungicides increase the need to search for safe, efficacious and environmentally friendly fungicides. Plants produce antifungal agents by secondary metabolism to protect themselves from fungal attack, and therefore many plant species have substantial antifungal activity. The use of plant

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35

Diop, Ousseynou. "Management of invasive aquatic weeds with emphasis on biological control in Senegal." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1005414.

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In 1985 the Diama Dam was built near the mouth of the Senegal River to regulate flows during the rainy season and prevent the intrusion of seawater during the dry season. This created ideal conditions upstream of the dam wall for invasion by two highly invasive aquatic weeds, first by water lettuce Pistia stratiotes Linnaeus (Araceae) in 1993, and then by salvinia Salvinia molesta D.S. Mitchell (Salviniaceae) in 1999. This study was focused on the management of P. stratiotes and S. molesta. Following successes that were achieved elsewhere in the world, biological control programmes involving t

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36

Seier, Marion K. "Evaluation of two fungal pathogens as classical biological control agents of the invasive weed Mimosa pigra in Australia /." [S.l. : s.n.], 1998. http://www.gbv.de/dms/bs/toc/252701771.pdf.

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37

Itholeng, Kebalepile Benedict Itholeng. "The indigenous knowledge of the local community towards weeds and alien invasive plants in the Dinokana area, North-West Province, South Africa / by Kebalepile Benedict Itholeng." Thesis, North-West University, 2007. http://hdl.handle.net/10394/2129.

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38

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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39

Hutchison, Melissa Alice Sarah. "Interactions between habitat fragmentation and invasions: factors driving exotic plant invasions in native forest remnants, West Coast, New Zealand." Thesis, University of Canterbury. School of Biological Sciences, 2009. http://hdl.handle.net/10092/3218.

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Habitat fragmentation and biological invasions are widely considered to be the most significant threats to global biodiversity, and synergistic interactions between these processes have the potential to cause even greater biodiversity loss than either acting alone. The objective of my study was to investigate the effects of fragmentation on plant communities in native forest fragments, and to examine potential interactions between these effects and invasions by exotic plants at multiple spatial scales. I examined edge, area and landscape effects on plant invasions using empirical data from fra

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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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Holly, D. Christopher. "Multi-scale evaluation of mechanisms associated with the establishment of a model invasive species in Mississippi Imperata cylindrica /." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-06052008-155216.

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42

DeGomez, Tom. "Invasive Plants in Arizona's Forests and Woodlands (Climate Change and Variability in Southwest Ecosystems Series)." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2007. http://hdl.handle.net/10150/146956.

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5 pp.<br>This is part of the series on climate variability<br>Climate change appears to have an effect on invasive species in the forests and woodlands of Arizona. Many invasive plants have been documented. Land managers and educators will find this publication informative.

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43

Von, Senger Inge. "An assessment of the genetic diversity and origin of the invasive weed Chromolaena Odorata (L.) King and Robinson in South Africa." Thesis, Rhodes University, 2002. http://hdl.handle.net/10962/d1003802.

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Chromolaena odorata (L.) King and Robinson is an alien invasive weed to most of the Old World tropical regions of the earth, including South Africa where it is morphologically distinct from most other C. odorata plants examined from both its native and invasive range. It is thought that these morphological differences are related to difficulties encountered in successful establishment of biological control agents on the South African population of C. odorata. It has been postulated that the source population of the South African population will harbour potential biocontrol agents that will be

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44

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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45

Larson, Daniel. "Non-indigenous freshwater plants : patterns, processes and risk evaluation /." Uppsala : Dept. of Environmental Assessment, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200715.pdf.

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46

Reed, Garret W. "Solarization as a means to eliminate invasive plant species and target the seedbank." Scholarly Commons, 2009. https://scholarlycommons.pacific.edu/uop_etds/735.

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The Calaveras River is a unique riparian habitat in San Joaquin County, influenced by both tidal water from the San Francisco Bay and impounded rainwater from the New Hogan Dam. The Calaveras River is one of the few river systems in California that does not benefit from snowpack melt. This dynamic system has changed dramatically in both its species composition and hydrodynamic regime due to years of human influences. What was once a thriving population of native plant species has become an environment dominated almost completely by aggressive exotic invasive species. The goal of this project w

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47

Lindsay, Elizabeth A. "The impact of Chrysanthemoides monilifera spp. rotundata (bitou bush) on coastal ecosystem processes." Access electronically, 2004. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20041222.143610/index.html.

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48

Van, der Laan Michael. "Allelopathic interference potential of the alien invader plant Parthenium hysterophorus." Diss., Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-04042007-134659.

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49

Scarr, Lowell Martin. "Assessing the value of public investment into biological control research for invasive alien plants : the ARC PPRI Weeds Research Division." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1020604.

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This study investigates the economic impact of the ARC PPRI Weeds Research Division. The Division researches appropriate methods of biological control for invasive alien plants (IAPs). These plants pose an increasing threat to environmental integrity and ecosystem service provision impacting on economic potential. Since the work of the Division is considered a public good, a predominantly descriptive approach has been adopted for the valuation process. A combination of quantitative cost analysis and a qualitative study of the impacts of research and invasive alien plants is used to deal with t

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Hely, Sara Elizabeth Lorraine Biological Earth &amp Environmental Sciences Faculty of Science UNSW. "The responses of C4 invasive grass Eragrostis curvula and C3 native grass Austrodanthonia Racemosa under elevated CO2 and water limitation." Awarded by:University of New South Wales, 2008. http://handle.unsw.edu.au/1959.4/35671.

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The concentration of atmospheric carbon dioxide (CO2) in the atmosphere has increased by 35% since pre-industrial levels. Projections for the next 100 years indicate an increase to levels between 490 and 1260 parts per million by volume (ppm) of CO2, equating to a 75 % to 350 % increase in concentration since the year 1750. Associated with this increase in [CO2] will be a 1.4 to 5.8?? C increase in lower atmospheric temperature. While past research has attempted to address the effects of such climatic changes on individual plant responses, predictions of plant responses at the ecosystem level

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