Carry-Over Effects of Overwinter Climate and Habitat Productivity on Spring Arrival of Migratory Songbirds at a Northern Stopover Site

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dc.contributor.advisorStutchbury, Bridget J.
dc.contributor.authorHorn, Lisa Christine
dc.date.accessioned2020-11-13T13:46:50Z
dc.date.available2020-11-13T13:46:50Z
dc.date.copyright2020-07
dc.date.issued2020-11-13
dc.date.updated2020-11-13T13:46:49Z
dc.degree.disciplineBiology
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractReduced rainfall in tropical regions may impact the ability of temperate-breeding songbirds to prepare for and execute their spring migration. I used 34 years of bird banding data from Ontario to test for the presence of climate-induced carry-over effects from wintering areas on the body condition and migration timing of birds en route to breed in Canada. Using linear models, I found that overwinter habitat productivity was significantly negatively influenced by the El Nio Southern Oscillation (ENSO) in the overwintering ranges in 3 of 7 species, where conditions were drier during El Nio years as expected. However, there was no consistent effect of ENSO or overwinter habitat productivity on stopover body condition or spring arrival date in southwestern Ontario. Widespread and long-lasting carry-over effects were not observed, suggesting that songbirds may compensate en route such that negative signatures from dry winters are absent late in migration.
dc.identifier.urihttp://hdl.handle.net/10315/37883
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectWildlife conservation
dc.subject.keywordsBody condition
dc.subject.keywordsCarry-over effects
dc.subject.keywordsClimate change
dc.subject.keywordsEl Niño Southern Oscillation
dc.subject.keywordsMigratory songbirds
dc.subject.keywordsNormalized Difference Vegetation Index
dc.subject.keywordsSpring migration timing
dc.subject.keywordsWinter habitat productivity
dc.titleCarry-Over Effects of Overwinter Climate and Habitat Productivity on Spring Arrival of Migratory Songbirds at a Northern Stopover Site
dc.typeElectronic Thesis or Dissertation

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