Main content

Flexibility of the spruce budworm – parasitoid food web

Show simple item record

dc.contributor.advisor McCann, Kevin S.
dc.contributor.advisor Eveleigh, Eldon S. Greyson-Gaito, Christopher Jochen 2018-08-23T16:31:59Z 2018-08-23T16:31:59Z 2018 2018-07-26 2018-08-23
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 *
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 Integrative Biology en_US Master of Science en_US Department of Integrative Biology en_US
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.

Files in this item

Files Size Format View
GreysonGaito_Christopher_201808_MSc.pdf 887.7Kb PDF View/Open

This item appears in the following Collection(s)

Show simple item record

Attribution-ShareAlike 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-ShareAlike 2.5 Canada