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Browsing by Author "Barrett, Robert T."

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  • Global phenological insensitivity to shifting ocean temperatures among seabirds
    Publication . Keogan, Katharine; Daunt, Francis; Wanless, Sarah; Phillips, Richard A.; Walling, Craig A.; Agnew, Philippa; Ainley, David G.; Anker-Nilssen, Tycho; Ballard, Grant; Barrett, Robert T.; Barton, Kerry J.; Bech, Claus; Becker, Peter; Berglund, Per-Arvid; Bollache, Loïc; Bond, Alexander L.; Bouwhuis, Sandra; Bradley, Russell W.; Burr, Zofia M.; Camphuysen, Kees; Catry, Paulo; Chiaradia, Andre; Christensen-Dalsgaard, Signe; Cuthbert, Richard; Dehnhard, Nina; Descamps, Sébastien; Diamond, Tony; Divoky, George; Drummond, Hugh; Dugger, Katie M.; Dunn, Michael J.; Emmerson, Louise; Erikstad, Kjell Einar; Fort, Jérôme; Fraser, William; Genovart, Meritxell; Gilg, Olivier; González-Solís, Jacob; Granadeiro, José Pedro; Grémillet, David; Hansen, Jannik; Hanssen, Sveinn A.; Harris, Mike; Hedd, April; Hinke, Jefferson; Igual, José Manuel; Jahncke, Jaime; Jones, Ian; Kappes, Peter J.; Lang, Johannes; Langset, Magdalene; Lescroël, Amélie; Lorentsen, Svein-Håkon; Lyver, Phil O’B.; Mallory, Mark; Moe, Børge; Montevecchi, William A.; Monticelli, David; Mostello, Carolyn; Newell, Mark; Nicholson, Lisa; Nisbet, Ian; Olsson, Olof; Oro, Daniel; Pattison, Vivian; Poisbleau, Maud; Pyk, Tanya; Quintana, Flavio; Ramos, Jaime A.; Ramos, Raül; Reiertsen, Tone Kirstin; Rodríguez, Cristina; Ryan, Peter G.; Sanz-Aguilar, Ana; Schmidt, Niels M.; Shannon, Paula; Sittler, Benoit; Southwell, Colin; Surman, Christopher; Svagelj, Walter S.; Trivelpiece, Wayne; Warzybok, Pete; Watanuki, Yutaka; Weimerskirch, Henri; Wilson, Peter R.; Wood, Andrew G.; Phillimore, Albert B.; Lewis, Sue
    Reproductive timing in many taxa plays a key role in determining breeding productivity1, and is often sensitive to climatic conditions2. Current climate change may alter the timing of breeding at different rates across trophic levels, potentially resulting in temporal mismatch between the resource requirements of predators and their prey3. This is of particular concern for highertrophic- level organisms, whose longer generation times confer a lower rate of evolutionary rescue than primary producers or consumers4. However, the disconnection between studies of ecological change in marine systems makes it difficult to detect general changes in the timing of reproduction5. Here, we use a comprehensive meta-analysis of 209 phenological time series from 145 breeding populations to show that, on average, seabird populations worldwide have not adjusted their breeding seasons over time (− 0.020 days yr−1) or in response to sea surface temperature (SST) (− 0.272 days °C−1) between 1952 and 2015. However, marked between-year variation in timing observed in resident species and some Pelecaniformes and Suliformes (cormorants, gannets and boobies) may imply that timing, in some cases, is affected by unmeasured environmental conditions. This limited temperature-mediated plasticity of reproductive timing in seabirds potentially makes these top predators highly vulnerable to future mismatch with lower-trophic-level resources.
    2018Journal article Restricted access Show more
  • Multispecies tracking reveals a major seabird hotspot in the North Atlantic
    Publication . Davies, Tammy E.; Carneiro, Ana P.B.; Tarzia, Marguerite; Wakefield, Ewan; Hennicke, Janos C.; Frederiksen, Morten; Hansen, Erpur Snær; Campos, Bruna; Hazin, Carolina; Lascelles, Ben; Anker‐Nilssen, Tycho; Arnardóttir, Hólmfríður; Barrett, Robert T.; Biscoito, Manuel; Bollache, Loïc; Boulinier, Thierry; Catry, Paulo; Ceia, Filipe R.; Chastel, Olivier; Christensen‐Dalsgaard, Signe; Cruz‐Flores, Marta; Danielsen, Jóhannis; Daunt, Francis; Dunn, Euan; Egevang, Carsten; Fagundes, Ana Isabel; Fayet, Annette L.; Fort, Jérôme; Furness, Robert W.; Gilg, Olivier; González‐Solís, Jacob; Granadeiro, J. P.; Grémillet, David; Guilford, Tim; Hanssen, Sveinn Are; Harris, Michael P.; Hedd, April; Huffeldt, Nicholas Per; Jessopp, Mark; Kolbeinsson, Yann; Krietsch, Johannes; Lang, Johannes; Linnebjerg, Jannie Fries; Lorentsen, Svein‐Håkon; Madeiros, Jeremy; Magnusdottir, Ellen; Mallory, Mark L.; McFarlane Tranquilla, Laura; Merkel, Flemming R.; Militão, Teresa; Moe, Børge; Montevecchi, William A.; Morera‐Pujol, Virginia; Mosbech, Anders; Neves, Verónica; Newell, Mark A.; Olsen, Bergur; Paiva, Vitor H.; Peter, Hans‐Ulrich; Petersen, Aevar; Phillips, Richard A.; Ramírez, Iván; Ramos, Jaime A.; Ramos, Raül; Ronconi, Robert A.; Ryan, Peter G.; Schmidt, Niels Martin; Sigurðsson, Ingvar A.; Sittler, Benoît; Steen, Harald; Stenhouse, Iain J.; Strøm, Hallvard; Systad, Geir H. R.; Thompson, Paul; Thórarinsson, Thorkell L.; Bemmelen, Rob S.A.; Wanless, Sarah; Zino, Francis; Dias, Maria P.
    The conservation of migratory marine species, including pelagic seabirds, is challenging because their movements span vast distances frequently beyond national jurisdictions. Here, we aim to identify important aggregations of seabirds in the North Atlantic to inform ongoing regional conservation efforts. Using tracking, phenology, and population data, we mapped the abundance and diversity of 21 seabird species. This revealed a major hotspot associated with a discrete area of the subpolar frontal zone, used annually by 2.9–5 million seabirds from ≥56 colonies in the Atlantic: the first time this magnitude of seabird concentrations has been documented in the high seas. The hotspot is temporally stable and amenable to site-based conservation and is under consideration as a marine protected area by the OSPAR Commission. Protection could help mitigate current and future threats facing species in the area. Overall, our approach provides an exemplar data-driven pathway for future conservation efforts on the high seas.
    2021Journal article Open access Show more