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dc.contributor.authorGrecian, W. James
dc.contributor.authorTaylor, Graeme A.
dc.contributor.authorLoh, Graeme
dc.contributor.authorMcGill, Rona A. R.
dc.contributor.authorMiskelly, Colin M.
dc.contributor.authorPhillips, Richard A.
dc.contributor.authorThompson, David R.
dc.contributor.authorFurness, Robert W.
dc.identifier.citationGrecian , W J , Taylor , G A , Loh , G , McGill , R A R , Miskelly , C M , Phillips , R A , Thompson , D R & Furness , R W 2016 , ' Contrasting migratory responses of two closely-related seabirds to long-term climate change ' , Marine Ecology Progress Series , vol. 559 , pp. 231-242 .
dc.identifier.otherPURE: 249951353
dc.identifier.otherPURE UUID: df960e08-4f87-43ea-b2f3-60a3a18e743e
dc.identifier.otherScopus: 84994756758
dc.identifier.otherORCID: /0000-0002-6428-719X/work/32706772
dc.description.abstractMany marine predators migrate between breeding and non-breeding areas to target resources that are seasonal but spatio-temporally predictable, and so are vulnerable to climate-induced changes in prey phenology and abundance. In the Southern Ocean, small petrels are major consumers, but perturbations in the ecosystem through ocean warming are altering food-web structure and have been linked to poleward shifts in the distribution of their cold-water zooplankton prey. In this study, we focused on 2 small congeneric petrels: the broad-billed prion Pachyptila vittata and the Antarctic prion P. desolata. Both are planktivorous, but the broad-billed prion specialises in feeding on large copepods. We investigated historical trends in non-breeding distribution by analysing feather stable isotope ratios from a time-series dating back to 1926, and examined contemporary non-breeding distributions of broad-billed prions tracked using miniaturised geolocation-immersion loggers. After controlling temporally for the Suess effect, we found that the δ13C signatures of Antarctic prions, but not broad-billed prions, declined during the study period. This suggests a southward shift in Antarctic prion non-breeding distribution over the last century. Both species exhibited significant declines in δ15N during the same period, indicative of long-term decreases in marine productivity in their moulting areas, or changes in the trophic structure of prey communities. Tracked broad-billed prions migrated ca. 1000 km to an area east of the breeding colony where the Louisville seamount chain bisects the subtropical front. Topographically driven upwellings are stable and predictable features and may be crucial in aggregating plankton. Targeting seamounts could therefore mitigate the impact of climate-induced prey shifts by providing refugia for the broad-billed prion.
dc.relation.ispartofMarine Ecology Progress Seriesen
dc.rights© The Authors 2016. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are unrestricted. Authors and original publication must be credited.en
dc.subjectNon-breeding behaviouren
dc.subjectStable isotopesen
dc.subjectUpwelling zonesen
dc.subjectQH301 Biologyen
dc.titleContrasting migratory responses of two closely-related seabirds to long-term climate changeen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Sea Mammal Research Uniten
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.description.statusPeer revieweden

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