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Flexibility of the spruce budworm – parasitoid food web

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dc.contributor.advisor McCann, Kevin S.
dc.contributor.advisor Eveleigh, Eldon S.
dc.contributor.author Greyson-Gaito, Christopher Jochen
dc.date.accessioned 2018-08-23T16:31:59Z
dc.date.available 2018-08-23T16:31:59Z
dc.date.copyright 2018
dc.date.created 2018-07-26
dc.date.issued 2018-08-23
dc.identifier.uri http://hdl.handle.net/10214/14092
dc.description.abstract The reduction in diversity is reducing the capacity of food webs to respond to variability. Two potentially important food web mechanisms are flexible food web structure and spatiotemporal coupling. To date, little research has examined flexibility and spatiotemporal coupling at the community scale. The large variation in spruce budworm densities every 35 years likely causes the community of parasitoids to shift from spruce budworm on balsam fir (a softwood) to other caterpillars on hardwood trees. We examined whether the parasitoid community flexibly responded to the changing relative abundances of spruce budworm and other caterpillars and exhibited spatiotemporal coupling of balsam fir and hardwoods. We found that the parasitoid community tracked the changing relative abundances of spruce budworm and other caterpillars and spatiotemporally coupled balsam fir and hardwoods. Community-level flexibility and spatiotemporal coupling could mute large oscillations. Therefore, maintaining hardwood tree diversity could similarly mute the large spruce budworm density fluctuations. en_US
dc.description.sponsorship NSERC Discovery Grant, Canadian Forest Service, Ontario Government, University of Guelph, Royal Canadian Geographical Society en_US
dc.language.iso en en_US
dc.rights Attribution-ShareAlike 2.5 Canada *
dc.rights.uri http://creativecommons.org/licenses/by-sa/2.5/ca/ *
dc.subject food webs en_US
dc.subject ecology en_US
dc.subject coupling en_US
dc.subject flexible food web structure en_US
dc.subject spruce budworm en_US
dc.subject Choristoneura fumiferana en_US
dc.subject parasitoids en_US
dc.subject balsam fir en_US
dc.subject Abies balsamea en_US
dc.subject softwoods en_US
dc.subject hardwoods en_US
dc.subject community en_US
dc.subject insects en_US
dc.title Flexibility of the spruce budworm – parasitoid food web en_US
dc.type Thesis en_US
dc.degree.programme Integrative Biology en_US
dc.degree.name Master of Science en_US
dc.degree.department Department of Integrative Biology en_US
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Attribution-ShareAlike 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-ShareAlike 2.5 Canada