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Dissertations / Theses on the topic 'Establishment of species'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Weiler, Lazarz Annalisa M. "Factors limiting native species establishment on former agricultural lands." Master's thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5564.

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Restoration of abandoned, nonnative species-dominated agricultural lands provides opportunities for conserving declining shrubland and grassland ecosystems. Land-use legacies, such as elevated soil fertility and pH from agricultural amendments, often persist for years and can favor nonnative species at the expense of native species. Understanding the factors that limit native species establishment on abandoned agricultural lands can provide important insights for restoration and conservation of native species on human-modified lands. I conducted two field experiments on abandoned agricultural

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2

Paterson, James P. H. "Species establishment and vegetation development on crushed rock substrates." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274546.

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3

Robinson, Chloe V. "Early detection and establishment assessment of aquatic invasive species." Thesis, Swansea University, 2018. https://cronfa.swan.ac.uk/Record/cronfa47968.

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Aquatic invasive species are drivers of ecological change through directly competing with native counterparts, causing alterations in community structure and acting as vectors for the introduction of novel pathogens. A combination of human-mediated introductions and accidental releases from aquaculture facilities has enabled highly invasive species, including the American signal crayfish (Pacifastacus leniusculus), Chinese mitten crab (Eriocheir sinensis) and topmouth gudgeon (Pseudorasbora parva) to become established in Great Britain. I assessed the factors which could have facilitated their

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4

Jernigan, Marcus B., Mitchel P. McClaran, Sharon H. Biedenbender, and Jeffrey S. Fehmi. "Uprooted buffelgrass thatch reduces buffelgrass seedling establishment." TAYLOR & FRANCIS INC, 2016. http://hdl.handle.net/10150/616972.

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Buffelgrass (Pennisetum ciliare (L.) Link), a non-native perennial bunchgrass, invades ecologically intact areas of the Sonoran Desert. It competitively excludes native plants and increases fire frequency and intensity. Since the 1990s, whole buffelgrass plants have been manually uprooted and removed to control the invasion in southern Arizona. Uprooting plants results in bare, disturbed soil which promotes buffelgrass seed germination. This study examined whether leaving entire uprooted buffelgrass plants (thatch) on a field site reduces future buffelgrass establishment compared to removing u

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5

Burch, Frances Mary. "The establishment of species-rich grassland on set-aside land : effects of location, establishment method and management on species colonisation and the control of weeds." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362360.

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6

Cassey, Phillip, and n/a. "Comparative Analyses of Successful Establishment Among Introduced Land Birds." Griffith University. Australian School of Environmental Studies, 2002. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030915.094001.

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Humankind has redistributed a large number of species outside their native geographic ranges. Although the majority of introduction attempts fail to establish populations, the cumulative negative effect of successful non-native species has been and will continue to be large. Historical records of land bird introductions provide one of the richest sources of data for testing hypotheses regarding the factors that affect the successful establishment of non-native populations. However, despite comprehensive summaries of global avian introductions dating back two decades only very recent studies ha

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7

Metcalf, Sarah Jean. "Symbiotic nitrogen fixation and establishment of six Montana native legumes species." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/metcalf/MetcalfS0805.pdf.

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8

Sullivan, June Eileen Marie 1957. "Seeding dates and field establishment of ten southwestern desert wildflower species." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276818.

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The effects of planting date were evaluated on field establishment and flowering of ten southwestern wildflower species combined in a mix. Species tested include Baileya multiradiata, Castilleja lanata, Eschscholtzia californica, Eschscholtzia mexicana, Gaillardia pulchellum, Lesquerella gordonii, Lupinus sparsiflorus, Orthocarpus purpurascens, Penstemon eatonii, and Phacelia campanularia. Seeds of all species were combined in a mix and directly seeded into field plots. All species are native to the southwestern deserts of the United States. Treatments consisted of five planting dates, startin

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9

Campos, Rebeca Victoria. "Evaluation of species establishment and revegetation practices along roadsides in Tucson, Arizona." Thesis, The University of Arizona, 2004. http://hdl.handle.net/10150/292079.

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This study evaluated the success of recently revegetated roadsides in Tucson, Arizona. The primary objectives of this study were to (1) evaluate a sample of revegetated roadsides by assessing site condition and comparing existing vegetation to the original seed mix; and (2) develop recommendations for appropriate revegetation practices for use in Tucson. Density data were collected at 20 locations using belt transects to derive species information such as origin, vegetative life-form, and invasiveness. Results indicated that the study sites had greater proportions of plant material not specifi

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10

Jones, Grant Harvey. "Factors controlling the establishment of species-rich grasslands in urban landscaping schemes." Thesis, University of Wolverhampton, 1993. http://hdl.handle.net/2436/96306.

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11

Chambers, Jeanne C. "Disturbed Alpine Ecosystems: Seedling Establishment of Early and Late Seral Dominant Species." DigitalCommons@USU, 1987. https://digitalcommons.usu.edu/etd/6370.

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This study examined the effects of seedbed and seedling environment on establishment of early and late seral dominant alpine species. Species studied included late seral dominant forbs (Geum rossii, Artemisia scopulorum, and Polemonium viscosum), early seral dominant forbs (Potentilla diversifolia and Sibbaldia procumbens), a late seral dominant grass (Festuca idahoensis), and early seral dominant grasses (Calamagrostis purpurascens and Deschampsia cespitosa). Germination responses of each species to wet vs. dry cold stratification and light vs. dark conditions were investigated. No statistica

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12

Laine, Laetitia Virginie. "Biological studies on two European termite species : establishment risk in the U.K." Thesis, Imperial College London, 2003. http://hdl.handle.net/10044/1/11797.

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13

Llorente, Mirandes Antoni. "Establishment and validation of analytical methods for the determination of arsenic species in foodstuffs." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/380034.

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Food and drinking water are the principal routes of exposure to arsenic (As) for humans. More than 50 different naturally occurring As-containing compounds have been identified. Regarding the toxicological aspects of arsenic in food, inorganic arsenic (iAs, (arsenite or As(III) and arsenate or As(V)) is considered to be the most dangerous form and is classified as a nonthreshold, class 1 human carcinogen. The organic forms are mainly considered to be non-toxic. Therefore, species-dependent differences in toxicity must be considered when establishing the maximum tolerated levels in food directi

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14

Potter, L. "Câ†4 species as potential fuel crops in E.England : establishment, growth, photosynthesis and productivity." Thesis, University of Essex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333893.

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15

Kirkwood, Donovan. "Establishment patterns of thicket and forest species in coastal dune landscapes of the southern Cape." Thesis, University of Cape Town, 1993. http://hdl.handle.net/11427/26396.

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16

Salazar, Ana. "Seed Dynamics and Seedling Establishment of Woody Species in the Tropical Savannas of Central Brazil (Cerrado)." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/371.

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Studies of seed dynamics and seedling establishment at the community level in savanna ecosystems are scant, particularly in the tropical savannas of Central Brazil. The Brazilian savannas (cerrado) have the largest diversity of plant species among Neotropical savannas. Cerrado vegetation exhibits consistent changes in tree density and tree size along shallow topographic gradients. Vegetation types differ from closed savannas with high tree density, and a nearly continuous canopy cover in the uppermost portions, to open savannas with scattered short trees in the low portions of the topographic

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17

Spielmann, Gesche [Verfasser], and Gerhard [Akademischer Betreuer] Haszprunar. "Establishment and comparison of molecular biological methods for seafood species authentication / Gesche Spielmann ; Betreuer: Gerhard Haszprunar." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1198112085/34.

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18

Panter, Jonathan Paul. "Effects of drought and vegetation management on the establishment of 3 tree species in Northamptonshire, England." Thesis, Cranfield University, 2006. http://dspace.lib.cranfield.ac.uk/handle/1826/8541.

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Water is a limiting factor in the distribution and growth of trees. Changing climatic conditions are likely to significantly effect tree species development. The planting and establishment of trees needs to take into account these changing factors in terms of design and species selection. This study looked at survival and growth of newly planted trees under field scale conditions and the effects of soil water availability and ground treatments. The experiment followed a blocked plan allowing a line source design to irrigate three tree species, ash, Douglas fir and oak. Each plot of 90 trees wa

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19

Van, Rensburg Sue Janse. "The suitability of ten South African species of marine macroalgae for establishment in temperate marine aquaria." Thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/26392.

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20

Jukes, Alison Rosemary. "The establishment of non-native plant species in relation to climate and land use in Britain." Thesis, University of York, 2013. http://etheses.whiterose.ac.uk/6257/.

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Human transport of species around Earth has led to the intentional and accidental introduction of many species into new regions. Introduced species can have significant impacts outside their native ranges, with a range of positive and negative ecological effects on native biota, community productivity and nutrient cycling. Climate and land use are major determinants of non-native species distributions, with climate setting the broad limits to plant distribution and productivity, and with human activity associated with different land uses affecting the dispersal and success of introduced specie

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21

Bryan, Donita Lynn. "Influence of planting depth on landscape establishment of container-grown trees." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3179.

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22

Pieterson, Elisabeth Corrie. "Nature versus Nurture: The Influence of Phylogenetic Relatedness, Origin, and Environment on Native and Introduced Woody Shrubs in the Eastern United States." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534521742118989.

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23

Pelech, William Edward. "Performance of selected native and introduced plant species under mowing and herbicide management during the establishment period." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq22652.pdf.

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24

Heydari, Hossein. "Establishment and ecophysiology of four Sonoran Desert woody species under a line-source sprinkler irrigation gradient system." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186916.

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Successful establishment of shrub and tree legumes in the southwestern United States is dependent on rainfall amount, frequency and distribution, seedbed temperatures and available water conditions affecting seed germination and seedling establishment. The line source sprinkler irrigation gradient system (LSSIGS) was used to test effects of different seedbed available water and temperature conditions on seedling emergence and establishment, and morphological and physiological characteristics of catclaw (Acacia greggii), jojoba (Simmondsia chinensis), velvet mesquite (Prosopis juliflora var. ve

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25

Hans, Ralston Ronald. "Initial growth responses to controlled release fertilizer application at establishment of commercial forestry species in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85609.

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Thesis (MScFor)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In South Africa fertilizer applications at establishment is a common practice in the forestry industry. Recommendations are based on past research with conventional sources (CV) and as a result there have only been slight improvements in additional plantation production over recent years. The objective of this study was to investigate initial stand responses in terms of leaf are index (LAI), foliar nutrient content, biomass index (BI) and volume growth to the application of controlled release fertilizers (CRF) at re-establish

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26

Pool, Joshua Roy. "Growth of four conifer species during establishment and the effects of recurring short-term drought on growth and photosynthetic capacity." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13661.

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Master of Science<br>Department of Horticulture, Forestry, and Recreation Resources<br>Jason Griffin<br>The Midwest and southern Great Plains regions of the United States are known for historic and severe droughts. However, short-term recurring drought events are more common and can limit tree survival in landscape and production settings. The pressure of environmental stress combined with numerous diseases and pests are decimating existing Pinus L. spp. (pine) plantings and driving the effort to identify alternative species. Four species of conifer were grown in a pine bark substrate and subj

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27

Gillespie, Melina Jane. "Establishment success of native understorey species on coal mine rehabilitation areas in the Hunter Valley, New South Wales /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17522.pdf.

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28

Watson, Mary Carolyn 1949. "Establishment of native Atriplex species evaluated under a line-source sprinkler irrigation system during the summer and winter." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/283996.

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Atriplex canescens (Pursh) Nutt., Atriplex polycarpa (Torr.) Wats., and Atriplex lentiformis (Torr). Wats. have been considered candidate perennial shrubs for revegetation of abandoned farmlands in southern Arizona. Objectives of the 1992-1994 field studies were to investigate the establishment characteristics of populations of these species and to estimate water requirements for establishing transplants and/or seedlings under a line-source sprinkler irrigation system. During the summer on a sandy loam soil, seedling establishment occurred at total water amounts greater than 200 mm but was ab

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29

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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30

Madsen, Matthew D. "Influence of soil water repellency on post-fire revegetation success and management techniques to improve establishment of desired species /." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3361.pdf.

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31

Madsen, Matthew D. "Influence of Soil Water Repellency on Post-fire Revegetation Success and Management Techniques to Improve Establishment of Desired Species." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1994.

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The influence of soil water repellency (WR) on vegetation recovery after a fire is poorly understood. This dissertation presents strategies to broaden opportunities for enhanced post-fire rangeland restoration and monitoring of burned piñon and juniper (P-J) woodlands by: 1) mapping the extent and severity of critical and subcritical WR, 2) determining the influence of WR on soil ecohydrologic properties and revegetation success, and 3) evaluating the suitability of a wetting agent composed of alkylpolyglycoside-ethylene oxide/propylene oxide block copolymers as a post-fire restoration tool fo

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32

Atkin, Bridget M. "Establishment and Aesthetic Value of Native Grass, Legume, and Forb Species for Grassland Restoration in the Northern Intermountain West." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/837.

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Interest in the restoration of landscapes native to the Intermountain West is growing as the value of these arid ecosystems is increasingly recognized. Many landscapes within the Intermountain region have been impacted by grazing, development, recreation, and other human-caused disturbances. The complex relationships within the native plant communities of these arid landscapes need to be well-understood biologically, while considering their aesthetic contribution, if restoration efforts are to succeed. Although the use of ecologically appropriate native species is increasing in popularity, the

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33

Tschöpe, Okka. "Managing open habitats for species conservation : the role of wild ungulate grazing, small-scale disturbances, and scale." Phd thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2007/1321/.

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During the last decades, the global change of the environment has caused a dramatic loss of habitats and species. In Central Europe, open habitats are particularly affected. The main objective of this thesis was to experimentally test the suitability of wild megaherbivore grazing as a conservation tool to manage open habitats. We studied the effect of wild ungulates in a 160 ha game preserve in NE Germany in three successional stages (i) Corynephorus canescens-dominated grassland, (ii) ruderal tall forb vegetation dominated by Tanacetum vulgare and (iii) Pinus sylvestris-pioneer forest over th

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34

Cheng, Zhiqiang. "Ecology of urban lawns the impact of establishment and management on plant species composition, soil food webs, and ecosystem functioning /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1187031808.

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35

Cawthorn, Donna-Maree. "Establishment of a genetic database and molecular methods for the identification of fish species available on the South African market." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18045.

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Thesis (PhD (Food Sc)--Stellenbosch University, 2011.<br>ENGLISH ABSTRACT: Consumers have the right to accurate information on the fish products they purchase to enable them to make educated seafood selections that will not endanger their own wellbeing or the wellbeing of the environment. Unfortunately, marine resource scarcity, financial incentives and inadequate or poorly enforced regulations have all promoted the mislabelling of fish species on global markets, the results of which may hold economic, conservation and health consequences. The primary aims of this study were to determine the m

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36

Pretorius, Petrus Johannes. "Effectiveness of coated seed in the establishment of herbaceous species on different mined substrates as influenced by pH and salinity." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/65941.

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Mining throughout the world is needed, especially coal mining to satisfy our need for electricity, and our entire economy is therefore dependant on mining. Competition exists for resources between mining and agriculture, since the rehabilitated land’s agricultural potential is changed after mining and it is yet to be proven that the land will reach the same potential again. Mining produces by-product tailings materials, waste products and slurry disposed in large dams. These tailings can in addition to the physical disturbance of the soil structure due to the physical mining progress cause the

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37

Olds, Alexis Amy. "The ichthyofauna of the Wilderness Lakes System, Western Cape, with particular emphasis on alien fish species and their establishment success." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005132.

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Freshwater fish species have been introduced into freshwater systems around the world, primarily for aquaculture, ornamental fish trade and sport fishing. Their introduction into estuarine systems is uncommon however, instances do occur and their establishment success and impacts on these estuarine systems is not well documented. The extent of invasion by four freshwater fishes in a RAMSAR listed estuarine system, the Wilderness Lakes, Western Cape was investigated. This thesis determined the relative abundance and distribution of alien fishes in relation to the native fish biota, their establ

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38

Barnett, Jennifer M. "The Impact of Chinese Privet (Ligustrum Sinense) on the Survival and Re-Establishment of Native Plants at the Dallas Floodway Extension." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc862725/.

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Invasive woody shrubs are a problem when they displace native species and threaten habitats, especially those that harbor rare or endangered species. They not only compete with native plants, but also alter habitat and food that many organisms depend upon. Invasive plants undergo a release from their specialist predators in the nonnative range, providing them advantages over native species. Because modes and pathways of how invasive species spread are not fully understood, predicting spread and implementing restoration ecological controls remain inexact. Due to the lack of comparative studies

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39

Westcott, Marguerite. "An evaluation of the germination and establishment of three selected coated grass species in different soil types for rehabilitation / Marguerite Westcott." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7603.

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The primary impacts of mining on the environment include the deterioration of soil properties and the loss of vegetation cover and density, often leading to increased erosion. In order to encumber further degeneration of such ecosystems and all subsequent other negative environmental impacts, active rehabilitation practices are often implemented. Active rehabilitation involves the introduction of species by different re–seeding (re–vegetation) methodologies. A higher vegetation cover and density is needed to increase soil quality, combat erosion and contribute to species richness, diversity an

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40

Washburn, Carolyn Foley. "Timing of managed seasonal drawdowns to promote the establishment of wetland plant species on the Tule Lake National Wildlife Refuge, California /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5344.

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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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42

Guichon, Shannon Heather Ann. "Mycorrhizal fungi : unlocking their ecology and role in the establishment and growth performance of different conifer species in nutrient-poor coastal forests." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55748.

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This thesis explored the fungal communities of arbuscular mycorrhizal-dominated Cedar-Hemlock (CH) and ectomycorrhizal-dominated Hemlock-Amabilis fir (HA) forests on northern Vancouver Island, British Columbia, Canada and examined the role of mycorrhizal inoculum potential for conifer seedling productivity. Objectives of this research project were to: (1) examine the mycorrhizal fungal communities and infer the inoculum potential of CH and HA forests, (2) determine whether understory plants in CH and HA forest clearcuts share compatible mycorrhizal fungi with either western redcedar (Thuja pli

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Germany, Markus Stefan [Verfasser], Alexandra [Akademischer Betreuer] Erfmeier, and Helge [Gutachter] Bruelheide. "The role of tree species richness and identity for herb layer characteristics and next generation tree species establishment in a subtropical forest in China / Markus Stefan Germany ; Gutachter: Helge Bruelheide ; Betreuer: Alexandra Erfmeier." Kiel : Universitätsbibliothek Kiel, 2021. http://d-nb.info/1228859078/34.

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44

Mostoller, Erin Lynn. "Site characteristics and plant invasion light limitation of invasive establishment and impacts of Elaeagnus umbellata on soil nitrogen availability and co-occurring species /." Connect to this title, 2008. http://scholarworks.umass.edu/theses/183/.

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Shepherd, Ashley Lauren. "Mapping of Sonoran Desert Vegetation Communities and Spatial Distribution Differences of Larrea Tridentata Seed Density in Relation to Ambrosia Dumosa and Ambrosia Deltoidea, San Cristobal Valley, Arizona." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/217053.

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Vegetation in the San Cristobal Valley of Barry M. Goldwater Range-East was mapped using a combination of field surveys and aerial imagery interpretation to contribute to ongoing inventory of natural resources for the BMGR-East as well as assist in resource management decisions. Eighteen vegetation associations were identified and mapped through collection of 186 samples to characterize vegetation associations. The most common vegetation association was Larrea tridentata monotype, covering 29% of the area mapped. Larrea tridentata is a widely spread shrub throughout the Sonoran, Chihuahuan and

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46

Skog, Manfred. "Changes in the fish community in Lake Tåkern, Sweden - a comparison between 1978-1979 and 2019." Thesis, Linköpings universitet, Biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-172003.

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Climate changes alter species composition in both aquatic and terrestrial ecosystems. For establishment of species in a fish community, dispersal barriers, habitat structure and interactions between species act as a filter. The aim of this study was to examine changes in the fish community in Lake Tåkern, Sweden, by repeating a test-fishing in a lake 40 years after a previous test-fishing. Special interest was directed towards the possible establishment of bream (Abramis brama) and (Cyprinus carpio) which recently had been found in the lake. In addition, a decline of the low oxygen tolerant sp

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47

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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Peacock, Lora. "Eco-climatic assessment of the potential establishment of exotic insects in New Zealand." Lincoln University, 2005. http://hdl.handle.net/10182/1530.

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To refine our knowledge and to adequately test hypotheses concerning theoretical and applied aspects of invasion biology, successful and unsuccessful invaders should be compared. This study investigated insect establishment patterns by comparing the climatic preferences and biological attributes of two groups of polyphagous insect species that are constantly intercepted at New Zealand's border. One group of species is established in New Zealand (n = 15), the other group comprised species that are not established (n = 21). In the present study the two groups were considered to represent success

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Braidwood, David Walter. "Remediation and restoration of ocean exposed cliff-top, in the context of Dounreay (Scotland) nuclear power plant decommissioning." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=237241.

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Restoration ecology continues to become ever more relevant as legislation demands we prevent biodiversity losses. Post-industrial restoration sites pose a number of additional challenges, including balancing ecological need with logistical and financial constraints. In the North of Scotland, one such site is the Dounreay Nuclear Power Plant, now undergoing decommissioning. The intention is to restore cliff-top habitat with native vegetation, blending in with its surroundings and necessitating minimal maintenance. The overall objective of this PhD research was to help develop a plan for the res

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Van, Wilgen Nicola Jane. "Alien invaders and reptile traders : risk assessment and modelling of trends, vectors and traits influencing introduction and establishment of alien reptiles and amphibians." Thesis, Stellenbosch : Stellenbosch University, 2010. http://hdl.handle.net/10019.1/5468.

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Thesis (PhD)--Stellenbosch University, 2010.<br>ENGLISH ABSTRACT: Biological invasions are a growing threat to biodiversity, trade and agriculture in South Africa. Though alien reptiles and amphibians (herpetofauna) are not currently a major issue, escalating problems worldwide and increased trade in South Africa suggest a possible increase in future problems. In this thesis I explore practical measures for risk assessment implementable under national legislation. I began by documenting record-keeping and legislative differences between provinces in South Africa. This revealed some seriou

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