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Dissertations / Theses on the topic 'Insect pollination'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 June 2025

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1

Cunnold, Helen Elizabeth. "Distinguishing pollination from visitation : the value of a pollinator effectiveness and pollinator importance network." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16121.

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For over twenty years, flower-visitation networks have been used to assess the effects of pollinator decline, linked to habitat loss, climate change and invasive species, on entire communities. However, most rely on flower visit frequency as a proxy for pollination; very few sample pollen from flower visitor's bodies or from stigmas and so do not include a quantitative measure of pollination success. Here, I add pollinator effectiveness (as single visit pollen deposition) into a traditional flower visitation network, creating a pollinator importance network that better evaluates the flower vis

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2

Gryj-Rubenstein, Ellen Orli. "Conflicting forces shaping reproductive strategies of plants : florivory and pollination /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/5126.

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3

Robinson, Samuel Victor Joseph. "Insect pollination and experimental warming in the High Arctic." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46539.

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As climate change causes retreats in Arctic glaciers, it is important to understand the mechanics of growth and community change in Arctic plant communities. Arctic plants have been shown to respond to observed and experimental changes in temperature by altering their reproductive strategies, growth, and phenology. Researchers have used open-top chambers (OTCs) to experimentally alter the near-surface air temperatures of tundra plant communities over long periods of time, but these devices may exclude insect pollinators to flowers during crucial periods of pollen reception. Insect pollination

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4

Osborn, Heather. "THE INTERACTION OF HERBIVORY AND POLLINATION." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/dissertations/1705.

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The interaction of herbivory and pollination is not well understood. Both topics on their own have been studied thoroughly, yet their interaction has not. Until the 1990s, few studies attempted to explore how herbivory might affect pollination, and vice versa.

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5

Cerqueira, Nicole. "Pollinator visitation preference on native and non-native congeneric plants." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.91 Mb., 84 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/1428175.

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6

Dicks, Lynn V. "The structure and functioning of flower-visiting insect communities on hay meadows." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249064.

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7

Husman, Stephen H., and Michael J. Ottman. "Growing Alfalfa for Seed in Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/552951.

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Originally Published: 1999; Revised<br>3 pp.<br>Seed production for profitability is challenging. Cultural practices differ from those commonly used in forage production. This article outlines management recommendations that may help to accomplish profitable seed alfalfa yields.

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8

D'Avila, Márcia. "Insetos visitantes florais em áreas de cerradão e cerrado sensu stricto no estado de São Paulo." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-24012007-155752/.

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Com o objetivo de conhecer a composição dos insetos e das plantas visitadas nas áreas de cerradão e cerrado sensu stricto, da Estação Experimental de Itirapina, SP, foram realizadas amostragens sistemáticas dos insetos nas plantas, no período de março de 2003 a fevereiro de 2004. Do total de insetos coletados nas flores, 63,3% e 63,8% são da ordem Hymenoptera, 17,1% e 2,5% da ordem Lepidoptera, 16% e 19,5% da ordem Coleoptera e 3,6% e 12,8% da ordem Diptera, respectivamente, para as áreas de cerradão e cerrado sensu stricto, e 1,4% para Hemiptera-Heteroptera no cerrado sensu stricto. A maioria

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9

Davila, Yvonne Caroline. "Pollination ecology of Trachymene incisa (Apiaceae): Understanding generalised plant-pollinator systems." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1896.

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A renewed focus on generalised pollinator systems has inspired a conceptual framework which highlights that spatial and temporal interactions among plants and their assemblage of pollinators can vary across the individual, population, regional and species levels. Pollination is clearly a dynamic interaction, varying in the number and interdependence of participants and the strength of the outcome of the interaction. Therefore, the role of variation in pollination is fundamental for understanding ecological dynamics of plant populations and is a major factor in the evolution and maintenance of

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10

Davila, Yvonne Caroline. "Pollination ecology of Trachymene incisa (Apiaceae): Understanding generalised plant-pollinator systems." University of Sydney, 2006. http://hdl.handle.net/2123/1896.

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Doctor of Philosophy (PhD)<br>A renewed focus on generalised pollinator systems has inspired a conceptual framework which highlights that spatial and temporal interactions among plants and their assemblage of pollinators can vary across the individual, population, regional and species levels. Pollination is clearly a dynamic interaction, varying in the number and interdependence of participants and the strength of the outcome of the interaction. Therefore, the role of variation in pollination is fundamental for understanding ecological dynamics of plant populations and is a major factor in the

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11

Puterbaugh, Mary Norris. "Alpine plant-ant interactions /." free to MU campus, to others for purchase, 1997. http://wwwlib.umi.com/cr/mo/fullcit?p9841329.

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12

Brand, Mariette Rieks. "Pollination ecosystem services to onion hybrid seed crops in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86238.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Insect pollination contributes in various degrees toward the production of a variety of agricultural crops that ensure diversity and nutritional value in the human diet. Although managed honeybees (Apis mellifera L.) are still the most economically valuable pollinators of monoculture crops cultivated globally, wild pollinator communities can contribute substantially toward crop pollination through pollination ecosystem services sourced from neighbouring natural habitats. Pollination ecosystem services are thus valuable and

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13

Young, Laura May. "Masting and insect pollination in the dioecious alpine herb Aciphylla : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Biological Science in the University of Canterbury /." Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/1345.

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Aciphylla species (wild spaniard/speargrass) are an iconic component of the Australasian high country flora, but their reproductive system is enigmatic. They are insect-pollinated dioecious mast seeders (synchronous highly variable seed production), which seems maladaptive. The resource supply to pollinators is highly variable, yet dioecious plants are dependent on pollinators, and dioecious masting requires male and female plants to flower synchronously. Floral display in Aciphylla is relatively large, with tall inflorescences bearing thousands of flowers, suggesting that plants would not hav

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14

Howpage, Daya, of Western Sydney Hawkesbury University, Faculty of Environmental Management and Agriculture, and Centre for Horticulture and Plant Sciences. "Pollination biology of kiwifruit : influence of honey bees, Apis mellifera L, pollen parents and pistil structure." THESIS_FEMA_HPS_Howpage_D.xml, 1999. http://handle.uws.edu.au:8081/1959.7/338.

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The importance of European honey bees in improving fruit set, yield and fruit weight of kiwifruit on the central east coast of Australia was investigated. Field investigations were carried out using different bee saturations and different types of male pollen parents. These investigations confirmed the importance of honey bees in kiwifruit fruit set, yield and fruit weight. However, the results suggested that increasing bee activity alone may not increase pollination of kiwifruit by honey bees. Many factors need to be understood before introducing bees into the orchard. Bees were more effectiv

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15

Howpage, Daya. "Pollination biology of kiwifruit : influence of honey bees, Apis mellifera L, pollen parents and pistil structure." Thesis, Richmond, N.S.W. : Centre for Horticulture and Plant Sciences, University of Western Sydney, Hawkesbury, 1999. http://handle.uws.edu.au:8081/1959.7/338.

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The importance of European honey bees in improving fruit set, yield and fruit weight of kiwifruit on the central east coast of Australia was investigated. Field investigations were carried out using different bee saturations and different types of male pollen parents. These investigations confirmed the importance of honey bees in kiwifruit fruit set, yield and fruit weight. However, the results suggested that increasing bee activity alone may not increase pollination of kiwifruit by honey bees. Many factors need to be understood before introducing bees into the orchard. Bees were more effectiv

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16

Yong, Kamuela E. "A mathematical model of the interactions between pollinators and their effects on pollination of almonds." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3020.

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California's almond industry, valued at $2.3 billion per year, depends on the pollinator services of honey bees, although pollination by other insects, mainly solitary wild bees, is being investigated as an alternative because of recent declines in the number of honey bee colonies. Our objective is to model the movements of honey bees and determine the conditions under which they will forage in less favorable areas of a tree and its surroundings when other pollinators are present. We hypothesize that foraging in less favor

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17

Haß, Annika Louise [Verfasser], Teja [Akademischer Betreuer] Tscharntke, Yann [Gutachter] Clough, and Péter [Gutachter] Batáry. "Farmland heterogeneity effects on biodiversity, community traits and insect pollination / Annika Louise Haß ; Gutachter: Yann Clough, Péter Batáry ; Betreuer: Teja Tscharntke." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1183374666/34.

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18

Matsuki, Yu. "Studies on pollination processes of two insect-pollinated tree species, Magnolia obovata and Aesculus turbinata with the aid of single pollen genotyping." Kyoto University, 2010. http://hdl.handle.net/2433/120474.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第15431号<br>農博第1816号<br>新制||農||980(附属図書館)<br>学位論文||H22||N4530(農学部図書室)<br>27909<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授井鷺裕司, 教授大澤晃, 教授柴田昌三<br>学位規則第4条第1項該当

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19

San, Martin-Gajardo Ivonne. "Biologia da polinização de especies da tribo Sinningieae (Gesneriaceae) no sudeste do Brasil." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315656.

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Orientador: Marlies Sazima<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-03T21:22:16Z (GMT). No. of bitstreams: 1 SanMartin-Gajardo_Ivonne_D.pdf: 3436187 bytes, checksum: 2aa80b9aee3a0ce67354aa7b8e79bf68 (MD5) Previous issue date: 2004<br>Resumo: A tribo Sinningieae (Gesneriaceae) apresenta três gêneros, Sinningia, Paliavana e Vanhouttea que reúnem aproximadamente 85 espécies, as quais abrangem diversas síndromes de polinização inferidas a partir da morfologia floral. Em 18 espécies de Sinningia, três de Vanhouttea e trê

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20

Araújo, Diogo Feliciano Dias. "A polinização de mirtilo (Vaccinium corymbosum L. var. Southern Highbush), uma cultura de clima temperado introduzida em ambiente tropical." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-06112018-101159/.

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Diversos aspectos vêm sendo estudados com relação à introdução de novas variedades de mirtilo no Brasil. A polinização de culturas tipicamente de clima temperado em clima tropical representa um enorme desafio para adaptação dessa cultura no país. Estudos relacionados à biologia básica da reprodução e ecologia da polinização envolvendo abelhas nas variedades do tipo Southern Highbush, ainda são inexistentes no Brasil e serão importantes para disseminação do cultivo. Levando-se em consideração que um dos aspectos determinantes dos efeitos de plantas exóticas nas comunidades nativas é a forma com

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21

Bos, Merijn M. "Insect diversity and trophic interactions in shaded cacao agroforestry and natural forests in Indonesia." Doctoral thesis, [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/bos.

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22

Mouton, Madele. "Significance of direct and indirect pollination ecosystem services to the apple industry in the Western Cape of South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6830.

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Thesis (MScConEcol (Conservation Ecology and Entomology))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: Insect pollinators play an important role in producing crops in global agriculture. Pollinatordependent crops contribute to maintaining a healthy variety in the human diet and often have a high market value, beneficial for local or regional economies. Insect crop pollinators can either be from natural areas adjacent to orchards, or they can be brought into orchards by beekeepers that manage them. Pollination by wild pollinators is an ecosystem service, while managed pollinator

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23

Cardoso, Priscila Bruno. "Interação formiga-planta-polinizador em Palicourea rigida (Rubiaceae) no cerrado: quando a proteção contra a herbivoria impacta negativamente a ação dos polinizadores." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/59/59131/tde-29102017-205519/.

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Os nectários extraflorais (NEFs) são estruturas produtoras de néctar, não relacionadas com a polinização, mas podem estar presentes em partes tanto vegetativas quanto reprodutivas da planta. Essas estruturas atraem uma grande diversidade de artrópodes, principalmente formigas, as quais protegem as plantas do ataque de herbívoros. Em geral, essas interações formiga-planta mediadas por NEFs são positivas, no entanto, em alguns casos podem apresentar efeitos negativos, interferindo diretamente no valor adaptativo da planta. Diante dessa perspectiva, este estudo objetivou avaliar se a atração de f

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24

Vereecken, Nicolas. "Pollinator-mediated selection, reproductive isolation and the evolution of floral traits in Ophrys (Orchidaceae)." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210518.

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Cette thèse aborde l’écologie et l’évolution des relations qu’entretiennent les orchidées du genre Ophrys avec leurs pollinisateurs. L’approche comparative et la combinaison (i)<p>d’analyses chimiques de phéromones sexuelles et de parfums floraux, (ii) d’analyses génétiques avec des outils moléculaires, et (ii) de tests de comportement réalisés sur les insectes in situ nous ont permis d’éclairer certains aspects méconnus de ces interactions inter-spécifiques. La pollinisation des orchidées du genre Ophrys est assurée par des mâles d'abeilles ou de guêpes solitaires qui opèrent une tentative d’

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25

Vezvaei, Ali. "Pollination studies in almond." Title page, contents and summary only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phv597.pdf.

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26

Phillips, Benjamin W. "The Ecological Impacts of Non-Native Annual and Native Perennial Floral Insectaries on Beneficial Insect Activity Density and Arthropod-Mediated Ecosystem Services Within Ohio Pumpkin (Cucurbita pepo) Agroecosystems." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1374181106.

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27

Hagler, James Robert. "Basic aspects of onion pollination." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184512.

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Difficulties in pollen transfer have adversely affected seed production of hybrid onion (Allium cepa L.) in the United States. Six onion cultivars were examined for differential attractiveness to the honey bee (Apis mellifera L.). Honey bees clearly discriminated between the onion cultivars in both open plots and caged plots. Nectar secretion, nectar sugar concentration, nectar sugar composition, mectar potassium content, and flower phenology were correlated with honey bee visitation. Nectar secretion rates ranged from 0.54 to 0.84 ul per floret per day. Onion cultivars also demonstrated diffe

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28

Wilson, Trevor Craig. "Evolution of pollination in prostanthera labill. (lamiaceae)." Thesis, The University of Sydney, 2010. https://hdl.handle.net/2123/28905.

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Prostanthera Labill. (Lamiaceae) is traditionally divided into section Klanderia (F. Muell.) Benth. and section Prostanthera based on floral characteristics that correspond to putatively ornithophilous or entomophilous pollination syndromes. To better understand these pollination syndromes and how they evolved, the phylogenetic relationships, floral morphology, and pollination of Prostanthera were investigated. Maximum parsimony and Bayesian phylogenies for 66 (~75%) species of Prostanthera were constructed using chloroplast (trnT-F, nth-rpl32) and nuclear (ETS) genomes. In all cases Prostam‘h

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29

Johner, Julia. "Pollinators in the city : Exploring the potential of urban environments as sites for conservation." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-166102.

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Insect pollinators provide indispensible ecosystem services for agricultural, natural and urban ecosystems, and have been declining drastically around the globe. These declines are largely due to fragmentation and loss of habitat resulting from urbanization and intensification of agriculture, and raise concerns over global food security. The purpose of this paper is to investigate the effects of urbanization on abundance, species richness and diversity of insect pollinators, and whether urban environments have potential as sites for conservation. Cities are highly heterogeneous environments wi

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30

Manley, Robyn Anna. "Emerging viral diseases of pollinating insects." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29677.

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The risks posed by rapidly evolving RNA viruses to human and animal health are well recognized. Epidemics in managed and wildlife populations can lead to considerable economic and biodiversity losses. Yet, we lack understanding of the ecological and evolutionary factors that promote disease emergence. Host-switching viruses may be a particular threat to species important for human welfare, such as pollinating bees. Both honeybees and wild bumblebees have faced sharp declines in the last decades, with high winter mortality seen in honeybees. Infectious and emerging diseases are considered one o

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31

Hahn, Robert. "Das Blüte-Bestäuber-Netz auf Brachflächen : biozönologische Untersuchung zur Bedeutung von Brachen in einer intensiv genutzten Agrarlandschaft." Phd thesis, Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2005/66/.

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In der vorliegenden Dissertation wird die Bedeutung von Brachen für Artenvielfalt und Stabilität von Blüte-Bestäuber-Nahrungsnetzen in agrarisch genutzten Landschaften anhand ausgewählter blütenbesuchender Insektengruppen (Syrphidae, Lepidoptera) untersucht. Die Freilandarbeiten fanden von 1998-2000 im Raum der Feldberger Seenlandschaft, Mecklenburg-Vorpommern, statt. Es werden die beiden Hauptnahrungsquellen Nektar und Pollen betrachtet, dabei fanden Untersuchungen zur Intensität der Blüte-Bestäuber-Interaktion auf Stilllegungsflächen, zum flächenbezogenen quantitativen Nektarangebot im Jahre

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32

Hill, Stuart John. "Pollination of almond (Prunus dulcis (Mill.) D.A. Webb)." Title page, contents and summary only, 1987. http://web4.library.adelaide.edu.au/theses/09A/09ah648.pdf.

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33

Swan, M. C. "An investigation of pollen transfer by selected pollinating insects." Thesis, Swansea University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.639143.

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Insect mediated pollen dispersal was studied in <i>Althaea officinalis, Succisa pratensis, Chrysanthemum coronarium, Matricaria maritima</i> and <i>Matthiola sinuata</i> using fluorescent dust as a pollen analogue or tracer. The species where chosen because of their different spectra of pollinators, so that the effects on pollen transfer of different behaviour patterns in different insect groups could be assessed. Pollinator behaviour was also studied by direct observation of insects foraging in both natural and artificial plant populations. Individual pollinators were marked in many cases, an

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34

Bensemann, Lauretta Lynley. "Patterns in flower visitation of flying insects in urban Christchurch." Thesis, University of Canterbury. Biological Sciences, 2013. http://hdl.handle.net/10092/9429.

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In this project I studied the importance of pollinators in the reproduction of Gastrodia ‘long column’ and the preferences of New Zealand’s native and exotic insect pollinators. This was done in order to determine the specialisation of insect pollination in urban Christchurch. This knowledge can contribute to crop pollination, conservation efforts, and an understanding of the main drivers of the common floral traits (small, white flowers) in New Zealand. The strength of the relationship between the common traits of the New Zealand flora and the preferences of the native invertebrate fauna is n

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Morandin, Lora A. "Wild bees and agroecosystems /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2386.

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Thesis (Ph.D.) - Simon Fraser University, 2005.<br>Theses ( Dept. of Biological Sciences) / Simon Fraser University. Includes bibliographical references. Also issued in digital format and available on the World Wide Web.

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36

Tarrant, Sam. "The potential of restored landfill sites to support pollinating insects." Thesis, University of Northampton, 2009. http://nectar.northampton.ac.uk/3595/.

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Habitat restoration is an important tool in reducing the current decline in biodiversity. To determine the success of restoration, ecologists have previously focused on species richness or on the presence of rare species; little is known of species interactions. This study examines both the potential of restored landfill sites to support pollinating insects and how flower-insect interactions can be used in determining successful restoration. These are important attributes of ecosystem function. Standard belt transects were used to record flowering insect pollinated plants and flower-visiting i

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37

Erenler, Hilary E. "The diversity of flower-visiting insects in the gardens of English country houses." Thesis, University of Northampton, 2013. http://nectar.northampton.ac.uk/8857/.

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38

Bataw, Ali A. M. "Pollination ecology of cultivated and wild raspberry (Rubus idaeus) and the behaviour of visiting insects." Thesis, University of St Andrews, 1996. http://hdl.handle.net/10023/14205.

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Floral morphology and anthesis were studied in commercial and in wild populations of raspberry (Rubus idaeus). Young flowers offered both nectar and pollen, but medium and old flowers offered nectar only, in diminishing quantity. All the three types had similar ageing patterns and diurnal patterns of nectar secretion, but they differed significantly in the nectar standing crop. Variation in nectar secretion rates within the raspberry cultivars was examined; Glen Moy produced more nectar per flower, and more flowers per meter, than Glen Prosen and wild raspberry flowers. There was significant d

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39

Carvalho, Carolina Maria Coelho de Almeida. "Evaluation of an ecosystem service in restored quarry areas: pollination." Master's thesis, Universidade de Évora, 2020. http://hdl.handle.net/10174/27832.

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Ecological restoration allows for accelerated recovery of a degraded ecosystem’s biodiversity, function, and ability to provide ecosystem services. However, the issues of when active restoration is necessary and how restoration effectiveness should be measured are still subject to considerable debate. Here we evaluate plant-pollinator networks in actively and passively restored quarries, comparing structure and composition to a natural area representing the reference ecosystem, to determine which restoration approach holds higher effectiveness on the rehabilitation of this ecological process.

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40

Sjödin, N. Erik. "Pollinating insect responses to grazing intensity, grassland characteristics and landscape complexity : behaviour, species diversity and composition /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200755.pdf.

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41

Ballantyne, Gavin. "Ants as flower visitors : floral ant-repellence and the impact of ant scent-marks on pollinator behaviour." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2535.

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As flower visitors, ants rarely benefit a plant, commonly disrupting pollination by deterring other flower visitors, or stealing nectar. This thesis examines three aspects of ant-flower interactions, focusing on the occurrence of floral traits that prevent disruption of pollination and a novel means by which ants may influence pollinator behaviour. To assess which types of plant species possess ant-repelling floral traits I carried out a survey of 49 Neotropical plant species. Around a third of these species were repellent to the common generalist ant Camponotus novograndensis (Formicinae). Th

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42

Alcorn, Katrina Leanjka. "Pollinator behaviour and the evolutionary genetics of petal surface texture in the Solanaceae." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648281.

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43

Auffray, Thomas. "Etude des interactions chimiques entre les espèces cultivées d'Elaeis et les insectes pollinisateurs." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT074.

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Le palmier à huile africain Elaeis guineensis Jacqu. (Arecales : Arecaceae) est une plante tropicale d’intérêt économique et la première source mondiale d’huile végétale. La production d’huile dépend de la pollinisation par des charançons du genre Elaeidobius (Coleoptera : Curculionidae). Ces insectes sont impliqués dans une relation mutualiste spécialisée avec leur plante-hôte : ils se développent au dépend des inflorescences mâles qu’ils détectent par le biais des odeurs émises durant l’anthèse, tandis que les inflorescences femelles sont pollinisées en mimant les odeurs mâles. Une maladie m

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Keshlaf, Marwan M. "An assessment of honeybee foraging activity and pollination efficacy in Australian Bt cotton." Thesis, View thesis, 2008. http://handle.uws.edu.au:8081/1959.7/38265.

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Cotton is a high-value commercial crop in Australia. Although cotton is largely self-pollinating, previous researchers have reported that honeybees, Apis mellifera, can assist in cross-pollination and contribute to improved yield. Until recently, use of bees in cotton had, however, been greatly limited by excessive use of pesticides to control arthropod pests. With the widespread use of transgenic (Bt) cotton varieties and the associated reduction in pesticide use, I decided to investigate the role and importance of honeybees in Bt cotton, under Australian conditions. I conducted two major fie

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Arnold, Sarah Elizabeth Joan. "Flowers through insect eyes : the contribution of pollinator vision to the evolution of flower colour." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/622.

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Flowers’ colours are an essential element of their ability to attract visits from pollinators. However, the colours as they appear to human observers can differ substantially from their appearance to insect pollinators, and so it is essential to consider pollinator vision in any study of the ecology of flower colour. In this thesis I describe how I have overseen the development of an online database to provide accurate information on floral spectral reflectance measured without human observational bias. This resource allows a more accurate consideration of flower colours in future studies, and

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Tudor, Emily Paige. "The Patterns and Processes of Insect Pollinator Re-assembly across a Post-mining Restoration Landscape." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/83667.

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This thesis presents an integration of in situ field studies and ex situ laboratory experiments to provide a deeper insight into the patterns and processes underpinning the reassembly of insect pollinator communities in post-mining Jarrah Forest restoration. Overall, this research highlighted the value of early successional patches and suggests that the habitat selection of some endemic insect pollinators is driven largely by their thermal tolerance, energetic requirements, and ecophysiology.

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Lombardi, Giorgio Colombo. "Variation in breeding systems, floral morphology and nectar properties in three co-occurring Erica species with contrasting pollination syndromes." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018567.

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The genus Erica is the most species rich in the Cape Floristic Kingdom, yet there are limited data on the various flower-pollinator interactions and breeding systems for the majority of these species. Until recently research has focussed on predictive floral traits, including flower shape, length of corolla and corolla opening to identify likely pollinators in this genus. Field observations provide an empirical test of such predictions. This study investigated three species of Erica and compared their pollination and breeding systems and floral biology. Research, including field experiments an

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Coombs, Gareth. "Ecology and degree of specialization of South African milkweeds with diverse pollination systems." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1003758.

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Like orchids, the complexity of flowers found in asclepiads (Asclepiadoideae, Apocynaceae) and the fact that pollen is presented as pollinaria, offers excellent opportunities to study various aspects of plant-pollinator interactions. In this thesis I investigated two broad themes: ecological aspects of the pollination biology of hymenopteran and fly-pollinated asclepiads as well as the degree of specialization to certain pollinators in these species. Colonizing plants often reproduce through self-pollination, or have highly generalized pollination systems, or both. These characteristics facili

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Howpage, Daya. "Pollination biology of kiwifruit : influence of honey bees, Apis melllifera L, pollen parents and pistil structure /." Richmond, N.S.W. : Centre for Horticulture and Plant Sciences, University of Western Sydney, Hawkesbury, 1999. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030509.153106/index.html.

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Sevenello, Montagner Jose Manuel. "Temporal Synchrony between Ground-Nesting Bees and Spring Ephemerals in an Eastern Hardwood Forest Ecosystem." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38299.

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Changes in phenology due to climate warming could disrupt temporal overlap between interacting organisms when previously synchronized species respond to climate change at different rates. Phenologies of plants and insects are known to be sensitive to temperature and/or timing of snowmelt, with warmer temperatures and earlier snowmelt generally advancing spring flowering and emergence; however, some groups of pollinators, such as solitary bees, have been little explored in this context. One striking aspect of eastern hardwood forests is the emergence of understory wildflowers each spring, most

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