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Dissertations / Theses on the topic 'Parasitoid'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Cournoyer, Michel 1976. "Host selection behavior of the adult parasitoid Microctonus hyperodae Loan (Hymenoptera:Braconidae:Euphorinae) and the egg parasitoid Anaphes victus Huber (Hymenoptera:Mymaridae), parasitoids of the carrot weevil, Listronotus oregonensis LeConte (Coleoptera:Curculionidae)." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80244.

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The carrot weevil, Listronotus oregonensis LeConte (Coleoptera: Curculionidae), is an important pest of carrot in northeastern North America. The objective of this study was to determine the host selection stimuli used by two L. oregonensis parasitoids: the adult parasitoid Microctonus hyperodae Loan and the egg parasitoid Anaphes victus Huber.<br>In the first chapter, the response of M. hyperodae females to various odor components from potential hosts and host plants was tested with a Y-olfactometer.<br>In the second chapter, the effect of L. oregonensis adult sex, feces and movement o

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2

Fors, Lisa. "Ecology and evolution in a host-parasitoid system : Host search, immune responses and parasitoid virulence." Doctoral thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-115243.

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In host-parasitoid systems, there is a continuous coevolutionary arms race where each species imposes a strong selection pressure on the other. The host needs to develop defence strategies in order to escape parasitism and the parasitoid must evolve counter-defence strategies in order to overcome the host’s immune defence and successfully reproduce. This makes host-parasitoid systems excellent model systems for understanding evolutionary processes underlying host race formation and speciation. In order to gain a better understanding of the complexity of host-parasitoid interactions several asp

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3

Tylianakis, Jason. "Ecological enhancement of an aphid parasitoid." Thesis, University of Canterbury. Zoology, 2002. http://hdl.handle.net/10092/1309.

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Insects have become increasingly resistant to chemical control methods, while at the same time public awareness of the harmful effects of synthetic pesticides has increased. The search for more environmentally 'friendly' means of pest suppression is gaining momentum and biological control (the use of natural enemies to reduce populations of noxious organisms) has become an increasingly sought-after option. Despite an increase in the establishment rate of insect natural enemies, classical biological control of arthropods is currently no more successful than it was one hundred years ago. Ecolog

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4

Rott, Anja Sibylle. "Indirect interactions in host-parasitoid communities." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243731.

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5

Fraser, Sally Elizabeth Mary. "The ecology of woodland parasitoid assemblages." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428501.

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6

French, David Richard. "Metapopulation processes in host-parasitoid systems." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395487.

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7

Snart, Charles J. P. "The metabolomics of host-parasitoid interactions." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30607/.

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This thesis examines the relationship between insect life history and behavioural decisions and underlying cellular biochemistry, with particular focus on bethylid parasitoid wasps in the genus Goniozus. This comprises the first major body of work attempting to draw links between the underlying metabolome of an organism and its behaviour. This thesis further optimised the first known example of a combined LC-MS and NMR metabolomic approach capable of analysing extremely low biomass samples (<1 mg), a vital requirement when studying the behaviour of individual organisms. Part 1 of this thesis d

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8

Camargos, Maria Gisely. "Padrão de dispersão espacial e temporal de Diachasmimorpha longicaudata (Hymenoptera: Braconidae) criado em larvas de Ceratitis capitata e Anastrepha fraterculus (Diptera: Tephritidae)." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/64/64134/tde-23032016-114303/.

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A capacidade de dispersão e parasitismo de D. longicaudata, proveniente de larvas de Ceratitis capitata (linhagem Ceratitis) e de Anastrepha fraterculus (linhagem Anastrepha) foi avaliada após liberação em pomar de goiaba. Onze liberações de cerca de 3.000 parasitoides foram realizadas entre março de 2014 e abril de 2015 no centro de um talhão de 15 ha de goiaba localizado no Projeto de Irrigação do Jaíba (15°14\'03.7\"S 43°56\'54.0\"W), em Jaíba, MG, Brasil. A dispersão foi monitorada, a partir de um ponto central de liberação, nas direções cardeais e colaterais, a uma distância de 6 m até 27

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9

Fellowes, Mark Dominic Edmund. "Evolution of host resistance to parasitoid attack." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8082.

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10

Green, Darren Michael. "Coevolutionary dynamics in a parasitoid-host system." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312023.

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11

Woodward, Janet Christine. "Insect host-parasitoid relationships in cow-dung." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241354.

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12

Traynor, Ruth Elizabeth. "Life history evolution in the parasitoid Hymenoptera." Thesis, University of York, 2004. http://etheses.whiterose.ac.uk/14063/.

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13

Santos, Ana Margarida Coelho dos. "Ecology and biogeography of island parasitoid faunas." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/5759.

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Islands constitute natural laboratories for the study of evolutionary and ecological processes due to their discrete and isolated nature. Island biotas tend to be species–poor and disharmonic compared to the mainland; typically, interspecific competition is low, and entire groups of predators, parasitoids or pathogens are absent from their biotas, so the ecological space is often not fully saturated. Consequently, species from island assemblages often use a wider range of resources than their counterparts from the source mainland. Here, I investigate whether island parasitoid communities have

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14

FERGUSON, NICOLE ROSEMARIE. "LEARNING AND HOST SPECIALIZATION IN PARASITOID WASPS." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/190443.

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15

Asplen, Mark K., David E. Bellamy, and David N. Byrne. "Eggs of Eretmocerus eremicus, a Whitefly Parasitoid." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/214910.

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Reproductive traits of wasp parasitoids are thought to be strong indicators of their success as biological control agents. Our study looks at the number of eggs produced by the whitefly parasitoid Eretmocerus eremicus. A series of experiments conducted on female wasps reared in the absence of whitefly hosts demonstrated that adult wasps emerge with a large (approximately 54) number of eggs that is retained during the first 2 days of adult life. Eggs are then absorbed steadily until at least 8 days following emergence. The results of this study suggest that the mode of egg production exhibited

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16

Li, Dongmei. "Immune reactions involved in parasitoid-host interactions /." Title page, contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phl6926.pdf.

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17

Onagbola, Ebenezer Oloyede Fadamiro Henry Y. "Studies on the biology and host location behavior of Pteromalus cerealellae (Ashmead) (Hymenoptera: Pteromalidae), a parasitoid of callosobruchus maculatus (F.) (Coleoptera: Chrysomelidae)." Auburn, Ala, 2008. http://repo.lib.auburn.edu/2007%20Fall%20Dissertations/Onagbola_Ebenezer_51.pdf.

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18

Smith, Susan K. "Parasitoid fitness and Cry1Ab : does the insecticidal protein Cry1Ab derived from Bacillus thuringiensis affect the beneficial parasitoid Cotesia marginiventris?" Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445492.

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19

Batchelor, Timothy Peter. "Parasitoid interactions in behavioural ecology and biological control." Thesis, University of Nottingham, 2005. http://eprints.nottingham.ac.uk/11176/.

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This thesis presents laboratory investigations on the competitive interactions which take place within and between bethylid parasitoids. Part one investigates the compatibility of three bethylids (Cephalonomia hyalinipennis, Cephalononlia stephanoderis and Prorops nasuta) for biocontrol releases against the principal pest of coffee, the coffee berry borer (CBB), Hypothenemus hampei. Cephalonomia hyalinipennis is able to hyperparasitise and consume pupae of C stephanoderis and P. nasuta. Cephalonomia stephanoderis also engages in intra-guild predation, consuming pupae of C hyalinipennis. In con

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20

Gwynn, David Mark. "The evolutionary ecology of an aphid parasitoid system." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494447.

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This thesis focuses on a question central to the field of evolutionary ecology; how variation is maintained within populations. Focusing on a model system based around the pea aphid (Acyrthosiphon pisum) I reveal substantial levels of genetic variation in every fitness related trait examined. Theory suggests that such variation may commonly be maintained by life-history trade-offs operating between different traits, but experimental examples of these traits are exceedingly rare within the literature. Populations of the pea aphid show high levels of variation in the ability to successfully defe

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21

Harvey, Jeffrey Alan. "The nutritional ecology of a host-parasitoid interaction." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241470.

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22

Casey, Abigail Nyree Jane. "The population dynamics of host-host-parasitoid system." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366395.

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23

Cook, James Mackenzie. "Sex determination and sex ratios in parasitoid wasps." Thesis, Online version, 1991. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.343408.

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24

Peres, Fernanda Salles Cunha [UNESP]. "Cravo-de-defunto (Tagetes patula L.) como planta atrativa para tripes (Thysanoptera) e himenópteros parasitóide (Hymenoptera) em cultivo protegido." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/91367.

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Made available in DSpace on 2014-06-11T19:25:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-05-25Bitstream added on 2014-06-13T18:53:12Z : No. of bitstreams: 1 peres_fsc_me_jabo.pdf: 331825 bytes, checksum: 18b3c8bc6500ae52044825067eb8d2af (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Foi avaliada a atratividade de Tagetes patula (cravo-de-defunto) sobre tripes (Thysanoptera) e micro-hymenoptera em cultivo protegido de melão. Foram estudadas a abundância, dominância, freqüência e constância de espécies de insetos utilizando-se a análise faunística

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25

Pham, Thi Nhi. "Diversity of pimpline wasps (Hymenoptera: Ichneumonidae) in the Central highlands of Vietnam." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-190753.

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In this paper, 48 ichneumonid species of 14 genera, two tribes of the subfamily Pimplinae were listed on the basis of material collected during the time from 2003 to 2011 in four provinces from the Central Highlands of Vietnam and a lesser degree of previous records. Among 48 aforemention pimpline no less than 16 species were described recently as new for science. The diversity of topography and vegetation types resulted in the high level of species richness and new discoveries of the region<br>Bài báo này giới thiệu danh sách 48 loài ong cự thuộc 14 giống, 2 tộc của phân họ Pimplinae dựa trên

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26

Steinbrecher, Isolde. "Effects of Bt transgenes on herbivorous insect-parasitoid interactions." Doctoral thesis, [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974147257.

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27

Broad, Gavin Roy. "Phylogenetic analysis of host utilisation patterns in parasitoid hymenoptera." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368910.

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28

Sykes, Edward M. "Life-history evolution in the parasitoid wasp Nasonia vitripennis." Thesis, University of Edinburgh, 2007. http://hdl.handle.net/1842/2564.

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Reproductive success is heavily influenced by life-history traits; a series of energy investment trade-offs that organisms must optimise according to their environmental conditions. These include considerations such as how many offspring and when to reproduce? The consequences of multiple trade-offs can be extremely complex, making research difficult. However, there are notable exceptions. Simple clutch size theory enabled great strides in assessing trade-offs in resource allocation, though it quickly becomes more complicated when considering investment in current versus future reproduction. A

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29

Hochberg, Michael Edward. "The population dynamics of arthropod host-parasitoid-pathogen interactions." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47476.

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30

Gates, Simon Philip. "The oviposition behaviour of the parasitoid Antrocephalus pandens Walker." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46781.

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31

Anandanadesan, Ananthi. "Modelling the spatio-temporal dynamics of aphid-parasitoid interactions." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/b6ace29c-4d4b-4e66-acd7-3f8a39c0656c.

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32

Lentz, Amanda Jean. "The effect of aphids in parasitoid-caterpillar-plant interactions." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28409.

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The ecology and evolution of a species is often considered only within the context of pairwise interactions even though a species' distribution and abundance may be determined by interactions with many species within and between trophic levels. Multiple herbivores often share the same host and may interact indirectly by altering the relationships between herbivores, their host plants and their parasitoids. However, the relationships between parasitoids and herbivore hosts have typically been studied in isolation of other herbivore species. I examined how the outcomes of species interactions ch

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33

MOREIRA, Marciene Dantas. "Parasitismo e superparasitismo de Trichogramma pretiosum Riley (Hymenoptera : Trichogrammatidae) em ovos de Sitotroga cerealella Oliver (Lepidoptera : Gelechiidae)." Universidade Federal Rural de Pernambuco, 2007. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5989.

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Submitted by (edna.saturno@ufrpe.br) on 2016-11-28T12:51:34Z No. of bitstreams: 1 Marciene Dantas Moreira.pdf: 367488 bytes, checksum: 1c62f7268fdd87f4772b0530a6eaab2b (MD5)<br>Made available in DSpace on 2016-11-28T12:51:34Z (GMT). No. of bitstreams: 1 Marciene Dantas Moreira.pdf: 367488 bytes, checksum: 1c62f7268fdd87f4772b0530a6eaab2b (MD5) Previous issue date: 2007-07-02<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>During the parasitism process many factors can lead to host rejection by the parasitoid. Thus, it was evaluated bio-ecological aspects of Tricho

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34

Martel, Guillaume. "Evaluation en laboratoire du parasitoïde Gryon gonikopalense (Hym ˸ Scelionidae) pour le contrôle biologique de Bagrada hilaris (Hem ˸ Pentatomidae), une punaise invasive aux Etats-Unis." Electronic Thesis or Diss., Montpellier, SupAgro, 2021. http://www.theses.fr/2021NSAM0023.

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Dans un contexte de mondialisation et de changement climatique, de plus en plus d'insectes deviennent invasifs et affectent notamment l'agriculture à l'échelle mondiale. Au cœur de ce réseau d'invasions, les Etats-Unis subissent l'arrivée de nombreuses espèces provenant principalement d'Asie. Parmi elles, les punaises pentatomidés menacent la plupart des agrosystèmes américains et sont aujourd'hui principalement régulées par les pesticides de synthèse. Bagrada hilaris (bagrada), originaire d'Asie et d'Afrique, est la plus récente à avoir colonisé les Etats-Unis où elle sévit depuis 2008 dans l

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35

Sagarra, Laurent A. "Biology and behaviour of the parasitoid Anagyrus kamali Moursi (Hymenoptera:Encyrtidae)." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36055.

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The parasitoid Anagyrus kamali Moursi [Hymenoptera: Encyrtidae] has been recently introduced into the Caribbean as a biological control agent against the Hibiscus Mealybug (HMB), Maconellicoccus hirsutus Green [Homoptera: Pseudococcidae]. Information on this parasitoid is scarce and investigations of its biology and behaviour were conducted to optimize its mass-production, and improve our understanding of the A. kamali/M. hirsutus system. Host selection experiments showed that, of nine species tested, HMB was the only suitable mealybug species for A. kamali development. Third nymphal instar wa

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36

Green, Philip Richard Stephen. "Patterns of movement and parasitism in Tephritid fly-parasitoid systems." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243943.

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37

Croft, Patricia. "The biology of the leafminer parasitoid Dacnusa sibirica (Hymenoptera: Braconidae)." Thesis, Imperial College London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271551.

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38

Tscheulin, Thomas Rainer. "Metapopulation dynamics of a one-host-two-parasitoid laboratory system." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412810.

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39

Hamid, Mohd Norowi. "The analysis of host-parasitoid relationships at various spatial scales." Thesis, University of Greenwich, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267350.

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40

Hernández, Castellano Carlos. "Drivers of variability in plant-pollinator and host-parasitoid communities: effects on interaction network structure and ecosystem function." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670558.

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Resums pendents<br>Les comunitats ecològiques són entitats dinàmiques l’estructura i composició de les quals està conformada per processos ecològics i per variabilitat ambiental. Degut a que les espècies interaccionen entre elles, els canvis en l’estructura i la composició de les comunitats poden alterar les xarxes d’interacció i el funcionament dels ecosistemes. En aquesta tesi estudio com un procés ecològic (la colonització d’un hàbitat per una nova espècie) i un component important de la variabilitat espacial (la grandària de l’hàbitat) afecta a les comunitats de pol·linitzadors, d’abelles

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Osorio, Cañadas Sergio. "Spatio-temporal variability of bee/wasp communities and their host-parasitoid interaction networks." Doctoral thesis, Universitat Autònoma de Barcelona, 2017. http://hdl.handle.net/10803/457746.

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Uno de los principales objetivos de la ecología es comprender cómo la biodiversidad está estructurada espacial y temporalmente, y cuáles son los mecanismos subyacentes a los gradientes de biodiversidad en diferentes escalas espaciales y temporales. En esta tesis, analizo la variabilidad espacio-temporal de comunidades de abejas/avispas (huéspedes) y de sus parasitoides, y de las redes de interacción huésped-parasitoide que se establecen entre ellas. Las especies de abejas y avispas muestran notables diferencias temporales en su fenología, y, por otro lado, las especies de abejas muestran difer

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42

Beck, Markus Hans. "Molecular genetics of host manipulation and competition in an insect parasitoid system." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09ACP/09acpb393.pdf.

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Bibliography: leaves 108-128. Maternal protein secretions from the parthenogenetic endoparasitoid wasp Venturia canescens Gravenhorst (Hymenoptera: Ichneumonidae) were analysed regarding their ability to protect the parasitoid egg against the host immune system. These secretions include nucleic acid-free glycoproteins, called virus-like particles (VLPs) that are produced in the ovarian calyx gland. Results found that VLP-free calyx fluid has the ability to actively suppress host defence reactions, rather than VLPs on the egg surface being solely responsible for the protection of the egg. It wa

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Siahmazgi, Ahad Sahragard. "Biological studies on Dicondylus indianus (Olmi) (Hymenoptera: dryinidae), with particular reference to foraging behaviour." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.232884.

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Wickremasinghe, M. G. V. "Behaviour of Aphidius rhopalosiphi (Hymenoptera : Aphidiidae) in relation to potential host community location." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234458.

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Oliveira, Nathalia Cavichiolli de. "Regulação da microbiota intestinal de hospedeiros permissivo e não- permissivo por Cotesia flavipes (Cameron) (Hymenoptera: Braconidae)." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-17092015-173941/.

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Parasitoides interferem no sistema imunológico de seus hospedeiros, influenciando a expressão de genes relacionados à resposta celular e humoral, podendo interferir na relação hospedeiro - microbiota intestinal. Além disso, parasitoides induzem alterações fisiológicas no hospedeiro que alteram o consumo e a utilização de alimento, e que podem influenciar a microbiata intestinal do mesmo. Alterações nessa microbiota poderiam afetar as relações e contribuições ao hospedeiro e, consequentemente, influenciar o desenvolvimento do próprio parasitoide. O objetivo deste trabalho foi o de verificar o e

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46

Becchi, Luciane Katarine [UNESP]. "Bioecologia do parasitoide Cleruchoides noackae (Hymenoptera: Mymaridae) em ovos de Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae)." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151844.

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Carvalho, Stella Pacheco Lombardi de. "Toxicidade de inseticidas neonicotinóides sobre o psilídeo Diaphorina citri Kuwayama (Hemiptera: Psyllidae) e o parasitóide Tamarixia radiata (Waterson) (Hymenoptera: Eulophidae)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-24072008-122955/.

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Os inseticidas neonicotinóides são atualmente o principal grupo químico utilizado para o controle de insetos sugadores, constituindo-se uma boa opção para o controle de Diaphorina citri Kuwayama. Outra opção de controle do psilídeo tem sido a exploração do parasitóide Tamarixia radiata (Waterson). A compatibilidade dessas duas estratégias de controle poderia auxiliar na implementação de programas de manejo integrado de pragas na cultura do citros. No entanto, faltam estudos sobre a caracterização da suscetibilidade de D. citri para os inseticidas neonicotinóides e o impacto desses inseticidas

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48

Pham, Thi Nhi. "Diversity of pimpline wasps (Hymenoptera: Ichneumonidae) in the Central highlands of Vietnam: Short communication." Technische Universität Dresden, 2014. https://tud.qucosa.de/id/qucosa%3A29105.

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In this paper, 48 ichneumonid species of 14 genera, two tribes of the subfamily Pimplinae were listed on the basis of material collected during the time from 2003 to 2011 in four provinces from the Central Highlands of Vietnam and a lesser degree of previous records. Among 48 aforemention pimpline no less than 16 species were described recently as new for science. The diversity of topography and vegetation types resulted in the high level of species richness and new discoveries of the region.<br>Bài báo này giới thiệu danh sách 48 loài ong cự thuộc 14 giống, 2 tộc của phân họ Pimplinae dựa trê

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49

Joyce, Andrea Lee. "Courtship acoustics and mating in Cotesia, a genus of parasitoid wasps." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1503.

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50

Stenberg, Johan. "Trophic, Indirect, and Evolutionary Interactions in a Plant–Herbivore–Parasitoid System." Doctoral thesis, Umeå universitet, Ekologi, miljö och geovetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1490.

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The aim of this thesis project was to elucidate patterns and processes associated with the biotic interactions in a natural plant–herbivore–parasitoid food web characterized by spatial and temporal heterogeneity with regard to species composition. The system examined is based on island populations of the perennial herb Meadowsweet (Filipendula ulmaria, Rosaceae), located in the Skeppsvik Archipelago. The area is subject to isostatic rebound, amounting to 0.85 cm per year; this makes it possible to calculate the age of the rising islands. Meadowsweet colonizes new islands when they are about 10

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