Species-level Compensatory Responses Buffer Drought and Nitrogen Eutrophication Impacts on Plant-Arthropod Interactions in Species-Rich Grasslands

dc.contributor.advisorMacDougall, Andrew
dc.contributor.authorRandall, Morgan
dc.date.accessioned2015-09-17T13:21:07Z
dc.date.available2015-09-17T13:21:07Z
dc.date.copyright2015-08
dc.date.created2015-09-14
dc.date.issued2015-09-17
dc.degree.departmentDepartment of Integrative Biologyen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeIntegrative Biologyen_US
dc.description.abstractHow drought and nitrogen deposition impact plant-arthropod dynamics is unclear due to interactions between water and nitrogen availability and plant quality for herbivores. Drought and eutrophication can increase plant quality (i.e., foliar nitrogen), the former doing so via physiological changes. Alternatively, drought may decrease plant quality by reducing ion transport and turgor. Re-occurrence of rainfall post-drought may result in the greatest plant quality by restoring ion transport and turgor. We employed a full factorial experiment in an old field and a tallgrass prairie to quantify interactions among drought, drought followed by a water pulse, and nitrogen addition on plants (biomass, cover, quality) and arthropods (herbivory, abundance, diversity). Community-level drought effects on plants were minor, explained by species-level compensation. Nitrogen addition increased biomass and foliar nitrogen, but not herbivory. Rather, arthropod-based responses were explained by grassland type. Our work demonstrates grassland plant-arthropod dynamics can be resistant to short-term drought and eutrophication.en_US
dc.identifier.urihttp://hdl.handle.net/10214/9246
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectherbivoryen_US
dc.subjectplant-arthropod interactionsen_US
dc.subjectwater-stressen_US
dc.subjectnitrogen eutrophicationen_US
dc.subjectrainfall sheltersen_US
dc.subjectgrasslandsen_US
dc.titleSpecies-level Compensatory Responses Buffer Drought and Nitrogen Eutrophication Impacts on Plant-Arthropod Interactions in Species-Rich Grasslandsen_US
dc.typeThesisen_US

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Randall_Morgan_201509_MSc.pdf
Size:
9.07 MB
Format:
Adobe Portable Document Format