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Seabird diet analysis suggests sudden shift in the pelagic communities of the subtropical Northeast Atlantic

2021Journal article Open access
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dc.contributor.authorRomero, Joana
dc.contributor.authorCatry, Paulo
dc.contributor.authorAlonso, Hany
dc.contributor.authorGranadeiro, José Pedro
dc.date.accessioned2021-01-14T20:57:03Z
dc.date.available2021-01-14T20:57:03Z
dc.date.issued2021
dc.description.abstractThe dynamics of the subtropical pelagic ecosystems of the Northeast Atlantic are still poorly known due to the high costs associated with sampling large oceanic areas. Top predators can be used as alternative low-cost samplers and indicators of the temporal variability of such systems. To study the variation in the composition of pelagic species through time in the broad Canary current region, we analysed foraging trips and regurgitations of Cory's shearwaters Calonectris borealis nesting on Selvagens islands, in 2008-2011 and 2016-2018. Fisheries data, oceanographic variables and the North Atlantic Oscillation were explored as possible explanatory variables for trends in behaviour and diet. Cory's shearwaters' diet, complemented by fisheries data, revealed marked changes in the composition of the pelagic fish communities. In 2016 there was a peak in the abundance of the Atlantic chub mackerel Scomber colias, followed by an explosive increase in the abundance of the Longspine snipefish Macroramphosus scolopax in 2017 and 2018, as deduced from the diet composition of the Cory's shearwater, and supported by fisheries data, in the broad oceanic area surrounding the Selvagens islands. Oceanographic variables did not show fluctuations correlated with these marked shifts in pelagic fish availability, the causes of which remain largely unknown. This study highlights the importance of the Atlantic chub mackerel and of the Longspine snipefish in the Madeira/Canary region and exemplifies the efficiency of avian predators in revealing rapid changes in pelagic communities of oceanic domains. Such trends and variations need to be better monitored and understood to measure the impact of ongoing global changes and to sustainably manage the marine environment and resources.pt_PT
dc.description.sponsorshipFundação para a Ciência e Tecnologia - FCTpt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMarine Environmental Research, 165(8), 1-8 Doi: 10.1016/j.marenvres.2020.105232pt_PT
dc.identifier.doi10.1016/j.marenvres.2020.105232pt_PT
dc.identifier.issn18790291
dc.identifier.urihttp://hdl.handle.net/10400.12/7901
dc.language.isoengpt_PT
dc.peerreviewednopt_PT
dc.publisherElsevierpt_PT
dc.relationTrophic links in open oceans: combining spatial data, dietary information and biomarkers from top predators to unveil structure and functioning of subtropical pelagic ecosystems
dc.relationMarine and Environmental Sciences Centre
dc.relationMarine and Environmental Sciences Centre
dc.relationCentre for Environmental and Marine Studies
dc.relationCentre for Environmental and Marine Studies
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSeabirdspt_PT
dc.subjectEcosystem changept_PT
dc.subjectPelagicpt_PT
dc.subjectCanary Currentpt_PT
dc.subjectCalonectris borealispt_PT
dc.subjectMacroramphosus scolopaxpt_PT
dc.subjectScomber coliaspt_PT
dc.subjectCommunity shiftpt_PT
dc.titleSeabird diet analysis suggests sudden shift in the pelagic communities of the subtropical Northeast Atlanticpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTrophic links in open oceans: combining spatial data, dietary information and biomarkers from top predators to unveil structure and functioning of subtropical pelagic ecosystems
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleMarine and Environmental Sciences Centre
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardTitleCentre for Environmental and Marine Studies
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR-PRO%2F0929%2F2014/PT
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oaire.citation.conferencePlaceNetherlandspt_PT
oaire.citation.endPage8pt_PT
oaire.citation.issue8pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleMarine Environmental Researchpt_PT
oaire.citation.volume165pt_PT
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oaire.fundingStream6817 - DCRRNI ID
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person.familyNameRomero
person.familyNameCatry
person.familyNameAlonso
person.givenNameJoana
person.givenNamePaulo
person.givenNameHany
person.identifier.ciencia-idEF1A-6A4A-013A
person.identifier.ciencia-id1D12-A88B-C408
person.identifier.orcid0000-0001-8059-1282
person.identifier.orcid0000-0003-3000-0522
person.identifier.orcid0000-0001-6698-6018
person.identifier.ridN-2526-2017
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project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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