Academic literature on the topic 'Generalist pollinators'
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Journal articles on the topic "Generalist pollinators"
Borkent, Christopher J., and Lawrence D. Harder. "Flies (Diptera) as pollinators of two dioecious plants: behaviour and implications for plant mating." Canadian Entomologist 139, no. 2 (April 2007): 235–46. http://dx.doi.org/10.4039/n05-087.
Full textLeal, Roberta Luisa Barbosa, Marina Muniz Moreira, Alessandra Ribeiro Pinto, Júlia de Oliveira Ferreira, Miguel Rodriguez-Girones, and Leandro Freitas. "Temporal changes in the most effective pollinator of a bromeliad pollinated by bees and hummingbirds." PeerJ 8 (March 25, 2020): e8836. http://dx.doi.org/10.7717/peerj.8836.
Full textChesshire, Paige R., Lindsie M. McCabe, and Neil S. Cobb. "Variation in Plant–Pollinator Network Structure along the Elevational Gradient of the San Francisco Peaks, Arizona." Insects 12, no. 12 (November 26, 2021): 1060. http://dx.doi.org/10.3390/insects12121060.
Full textScott-Brown, Alison, and Hauke Koch. "New directions in pollinator research: diversity, conflict and response to global change." Emerging Topics in Life Sciences 4, no. 1 (June 18, 2020): 1–6. http://dx.doi.org/10.1042/etls20200123.
Full textNordström, Karin, Josefin Dahlbom, V. S. Pragadheesh, Suhrid Ghosh, Amadeus Olsson, Olga Dyakova, Shravanti Krishna Suresh, and Shannon B. Olsson. "In situ modeling of multimodal floral cues attracting wild pollinators across environments." Proceedings of the National Academy of Sciences 114, no. 50 (November 27, 2017): 13218–23. http://dx.doi.org/10.1073/pnas.1714414114.
Full textHiguera-Díaz, Mónica, Jessamyn S. Manson, and Jocelyn C. Hall. "Pollination biology of Cleomella serrulata and Polanisia dodecandra in a protected natural prairie in southern Alberta, Canada." Botany 93, no. 11 (November 2015): 745–57. http://dx.doi.org/10.1139/cjb-2015-0084.
Full textStaines, Morgan, Cathy Vo, Natalie Puiu, Sarah Hayes, Marika Tuiwawa, Mark I. Stevens, and Michael P. Schwarz. "Pollen larceny of the tropical weed Solanum torvum by a Fijian endemic halictine bee with implications for the spread of plants with specialized pollinator requirements." Journal of Tropical Ecology 33, no. 3 (May 2017): 183–87. http://dx.doi.org/10.1017/s0266467417000098.
Full textPiacentini, Vítor de Queiroz, and Isabela Galarda Varassin. "Interaction network and the relationships between bromeliads and hummingbirds in an area of secondary Atlantic rain forest in southern Brazil." Journal of Tropical Ecology 23, no. 6 (October 29, 2007): 663–71. http://dx.doi.org/10.1017/s026646740700449x.
Full textRopars, Lise, Laurence Affre, Matthieu Aubert, Catherine Fernandez, Floriane Flacher, David Genoud, Frédéric Guiter, et al. "Pollinator Specific Richness and Their Interactions With Local Plant Species: 10 Years of Sampling in Mediterranean Habitats." Environmental Entomology 49, no. 4 (June 13, 2020): 947–55. http://dx.doi.org/10.1093/ee/nvaa061.
Full textRussell, Avery L., and Tia-Lynn Ashman. "Associative learning of flowers by generalist bumble bees can be mediated by microbes on the petals." Behavioral Ecology 30, no. 3 (February 6, 2019): 746–55. http://dx.doi.org/10.1093/beheco/arz011.
Full textDissertations / Theses on the topic "Generalist pollinators"
Gibson, Stephen. "Geographical variation in insect pollinators of generalist Asteraceae." Thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26665.
Full textDavila, 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.
Full textDavila, Yvonne Caroline. "Pollination ecology of Trachymene incisa (Apiaceae): Understanding generalised plant-pollinator systems." University of Sydney, 2006. http://hdl.handle.net/2123/1896.
Full textA 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 generalised and specialised pollination systems. My study centred on these basic concepts by addressing the following questions: (1) How variable are pollinators in a generalised pollination system? To what degree do insect visitation rates and assemblage composition vary spatially among populations and temporally among flowering seasons? (2) How does variation in pollinators affect plant reproductive success? I chose to do this using a model system, Trachymene incisa subsp. incisa (Apiaceae), which is a widespread Australian herbaceous species with simple white flowers grouped into umbels that attract a high diversity of insect visitors. The Apiaceae are considered to be highly generalist in terms of pollination, due to their simple and uniform floral display and easily accessible floral rewards. Three populations of T. incisa located between 70 km and 210 km apart were studied over 2-3 years. The few studies investigating spatial and temporal variation simultaneously over geographic and yearly/seasonal scales indicate that there is a trend for more spatial than temporal variation in pollinators of generalist-pollinated plants. My study showed both spatial and temporal variation in assemblage composition among all populations and variation in insect visitation rates, in the form of a significant population by year interaction. However, removing ants from the analyses to restrict the assemblage to flying insects and the most likely pollinators, resulted in a significant difference in overall visitation rate between years but no difference in assemblage composition between the Myall Lakes and Tomago populations. These results indicate more temporal than spatial variation in the flying insect visitor assemblage of T. incisa. Foraging behaviour provides another source of variation in plant-pollinator interactions. Trachymene incisa exhibits umbels that function as either male or female at any one time and offer different floral rewards in each phase. For successful pollination, pollinators must visit both male and female umbels during a foraging trip. Insects showed both preferences and non-preferences for umbel phases in natural patches where the gender ratio was male biased. In contrast, insects showed no bias in visitation during a foraging trip or in time spent foraging on male and female umbels in experimental arrays where the gender ratio was equal. Pollinator assemblages consisting of a mixture of different pollinator types coupled with temporal variation in the assemblages of populations among years maintains generalisation at the population/local level. In addition, spatial variation in assemblages among populations maintains generalisation at the species level. Fire alters pollination in T. incisa by shifting the flowering season and reducing the abundance of flying insects. Therefore, fire plays an important role in maintaining spatial and temporal variation in this fire-prone system. Although insect pollinators are important in determining the mating opportunities of 90% of flowering plant species worldwide, few studies have looked at the effects of variation in pollinator assemblages on plant reproductive success and mating. In T. incisa, high insect visitation rates do not guarantee high plant reproductive success, indicating that the quality of visit is more important than the rate of visitation. This is shown by comparing the Agnes Banks and Myall Lakes populations in 2003: Agnes Banks received the highest visitation rate from an assemblage dominated by ants but produced the lowest reproductive output, and Myall Lakes received the lowest visitation rate by an assemblage dominated by a native bee and produced the highest seedling emergence. Interestingly, populations with different assemblage composition can produce similar percentage seed set per umbel. However, similar percentage seed set did not result in similar percentage seedling emergence. Differences among years in reproductive output (total seed production) were due to differences in umbel production (reproductive effort) and proportion of umbels with seeds, and not seed set per umbel. Trachymene incisa is self-compatible and suffers weak to intermediate levels of inbreeding depression through early stages of the life cycle when seeds are self-pollinated and biparentally inbred. Floral phenology, in the form of synchronous protandry, plays an important role in avoiding self-pollination within umbels and reducing the chance of geitonogamous pollination between umbels on the same plant. Although pollinators can increase the rate of inbreeding in T. incisa by foraging on both male and female phase umbels on the same plant or closely related plants, most consecutive insect movements were between plants not located adjacent to each other. This indicates that inbreeding is mostly avoided and that T. incisa is a predominantly outcrossing species, although further genetic analyses are required to confirm this hypothesis. A new conceptual understanding has emerged from the key empirical results in the study of this model generalised pollination system. The large differences among populations and between years indicate that populations are not equally serviced by pollinators and are not equally generalist. Insect visitation rates varied significantly throughout the day, highlighting that sampling of pollinators at one time will result in an inaccurate estimate and usually underestimate the degree of generalisation. The visitor assemblage is not equivalent to the pollinator assemblage, although non-pollinating floral visitors are likely to influence the overall effectiveness of the pollinator assemblage. Given the high degree of variation in both the number of pollinator species and number of pollinator types, I have constructed a model which includes the degree of ecological and functional specialisation of a plant species on pollinators and the variation encountered across different levels of plant organisation. This model describes the ecological or current state of plant species and their pollinators, as well as presenting the patterns of generalisation across a range of populations, which is critical for understanding the evolution and maintenance of the system. In-depth examination of pollination systems is required in order to understand the range of strategies utilised by plants and their pollinators, and I advocate a complete floral visitor assemblage approach to future studies in pollination ecology. In particular, future studies should focus on the role of introduced pollinators in altering generalised plant-pollinator systems and the contribution of non-pollinating floral visitors to pollinator assemblage effectiveness. Comparative studies involving plants with highly conserved floral displays, such as those in the genus Trachymene and in the Apiaceae, will be useful for investigating the dynamics of generalised pollination systems across a range of widespread and restricted species.
Davila, Yvonne Caroline. "Pollination ecology of Trachymeme incisa (Apiaceae) understanding generalised plant-pollinator systems /." Connect to full text, 2006. http://hdl.handle.net/2123/1896.
Full textTitle from title screen (viewed 15 January 2009). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Biological Sciences, Faculty of Science. Includes bibliographical references. Also available in print form.
Wallin, Jakob. "Plant-pollinator networks in three habitats on a baltic island." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-1009.
Full textOliveira, José Cerca de. "Pollinator preference in a hybrid zone between two generalist plant species." Master's thesis, 2014. http://hdl.handle.net/10316/31209.
Full textThe evolutionary mechanism behind flowers and its pollinators is generally understood to be a gradual co-adaptive process where the plant specializes to its most efficient pollinator, which exerts selective pressures on specific traits, driving floral evolution. Still, most flowering plants in nature are visited by a wide array of pollinator species, i.e. are generalist plants. However, the role of pollinators as significant drivers of floral evolution in generalist plants has been questioned due to the potential conflicting selection regimes exerted by different pollinators. Taking this into account, using a combination of observation and manipulative experiments, we assessed pollinator preference in a natural contact zone where the generalist rayed species Anacyclus clavatus and the rayless A. valentinus co-exist and hybridize, forming intermediate phenotypes. These contact areas show a remarkably high phenotypic variation, with the intermediate phenotype bridging both phenotypes and forming an exceptional micro-evolutive framework to explore how generalist pollinators could be driving the evolution of floral phenotypes. We found that the production of rays influenced the probability of being visited by specific insect groups, in particular by Dipteran groups; whereas bees showed no preference for rayed phenotypes and their visitation patterns were mainly driven by the number of capitula simultaneously blooming in the plant. In addition, we found support for the importance of the neighbours’ phenotype when assessing pollinator preference on a focal individual. Rayed plants benefited from having other conspicuous neighbours, whereas rayless and intermediate phenotypes significantly competed for pollinators. In conclusion, all these differential behavioural patterns of floral visitors might affect gene flow within the hybrid zone between A. clavatus and A. valentinus influencing the degree of reproductive isolation and floral evolution between both species.
Os mecanismos evolutivos que atuam nas flores e respetivos polinizadores são normalmente descritos como processos de co-adaptação gradual onde a planta se especializa no seu polinizador mais eficiente, que por sua vez, exerce pressões evolutivas em características específicas e dessa forma guia a evolução da flor. Ainda assim, a maior parte das plantas com flor são polinizadas por um leque diversificado de espécies de polinizadores, denominando-se assim plantas generalistas. No entanto, em plantas generalistas o papel dos polinizadores na evolução floral tem sido questionado devido a potenciais conflitos na selecção exercida pelas diferentes espécies de polinizadores que visitam a flor. Tendo isto em conta, abordagens observacionais e manipulativas foram utilizadas para avaliar as preferências dos polinizadores numa zona de contacto onde as espécies generalistas Anacyclus clavatus (com lígulas) e a espécie A. valentinus (sem lígulas) coexistem e hibridizam, formando fenótipos intermédios. Estas áreas possuem uma variação fenotípica notável, com o fenótipo intermédio a representar o cruzamento entre as duas espécies, garantindo um cenário microevolutivo excecional para estudar de que forma os polinizadores conduzem a evolução fenotípica em espécies generalistas. Os resultados obtidos revelaram que a produção de lígulas influenciou a probabilidade das plantas serem visitadas por grupos específicos de insetos, em particular por dípteros; por sua vez, as abelhas não revelaram preferências por um fenótipo em particular, preferindo maioritariamente plantas com um elevado número de capítulos em flor. Além disto, os nossos resultados evidenciaram também que a composição fenotípica da vizinhança poderá desempenhar um papel importante na atração de uma planta focal específica; em particular, plantas liguladas beneficiaram em ter outros vizinhos com lígulas, enquanto que os fenótipos sem lígulas e intermédios competiram significativamente por polinizadores. Os diferentes padrões de comportamento diferentes por parte dos visitantes florais observados neste estudo podem afetar o fluxo genético na zona híbrida entre A. clavatus e A. valentinus, influenciando o grau de isolamento reprodutivo e evolução floral entre as duas espécies.
Book chapters on the topic "Generalist pollinators"
Allen, Warwick J. "Indirect biotic interactions of plant invasions with native plants and animals." In Plant invasions: the role of biotic interactions, 308–23. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0308.
Full textMenzel, Randolf, Uwe Greggers, and Martin Hammer. "Functional Organization of Appetitive Learning and Memory in a Generalist Pollinator, the Honey Bee." In Insect Learning, 79–125. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2814-2_4.
Full textNitharwal, Mukesh, Rashmi Rolania, Hanuman Singh Jatav, Kailash Chandra, Mudassar Ahmed Khan, Subhita Kumawat, Sanjay Kumar Attar, and Shish Ram Dhaka. "Pollinators: Their Relevance in Conservation and Sustainable Agro-Ecosystem." In Plant Reproductive Ecology - Recent Advances. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.100531.
Full textThompson, John D. "Plant reproduction." In Plant Evolution in the Mediterranean, 218–63. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198835141.003.0006.
Full textAllen, Warwick J. "Indirect biotic interactions of plant invasions with native plants and animals." In Plant invasions: the role of biotic interactions, 308–23. CABI, 2020. http://dx.doi.org/10.1079/9781789242171.0017.
Full textWillmer, Pat. "Syndromes and Webs: Specialists and Generalists." In Pollination and Floral Ecology. Princeton University Press, 2011. http://dx.doi.org/10.23943/princeton/9780691128610.003.0020.
Full textHolliday, Christopher. "Pixar, Performance and Puppets." In The Computer-Animated Film, 127–43. Edinburgh University Press, 2018. http://dx.doi.org/10.3366/edinburgh/9781474427883.003.0007.
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