Environmental and life-history factors influence inter-colony multidimensional niche metrics of a breeding Arctic marine bird

Smith, Reyd A.; Yurkowski, David J.; Parkinson, Kyle J.L.; Fort, Jérôme; Hennin, Holly L.; Gilchrist, H. Grant; Hobson, Keith A.; Danielsen, Jóhannis; Garbus, Svend Erik; Hanssen, Sveinn Are; Jónsson, Jón Eínar; Latty, Christopher J.; Magnusdottir, Ellen; Moe, Børge; Parsons, Glen J.; Sonne, Christian; Tertitski, Grigori; Love, Oliver P.

doi:10.1016/j.scitotenv.2021.148935

Cited by 9 publications

(2 citation statements)

References 161 publications

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“…3). The first-laid egg from each study nest was collected for another project (e.g., Smith et al 2021) and was also immediately candled to estimate incubation stage (i.e., the number of days since an eider laid their first-laid egg on the day of heartrate monitoring equipment deployment, allowing us to calculate incubation stage for the days of simulated-predator approaches; Weller 1956). We replaced this egg with the artificial egg.…”

Section: Heart-rate Monitoringmentioning

confidence: 99%

Heightened heart rate but similar flight responses to evolved versus recent predators in an Arctic seabird

Geldart¹,

Love²,

Gilchrist³

et al. 2023

ACE

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Predator-prey dynamics in the Arctic are being altered with changing sea ice phenology. The increasing frequency of predation on colonial nesting seabirds and their eggs by the polar bear (Ursus maritimus) is a consequence of bears shifting to terrestrial food resources through a shortened seal-hunting season. We examined antipredator responses in a colony of nesting Common Eiders (Somateria mollissima) on East Bay Island, Nunavut, Canada, which is exposed to established nest predators, such as arctic fox (Vulpes lagopus), but also to recent increases in polar bear nest predation due to the bears' lost on-ice hunting opportunities. Given eiders' limited eco-evolutionary experience with bears, we aimed to experimentally contrast eider responses to the recent predation pressure by polar bears to those induced by their more traditional mammalian predator, the arctic fox. Our goal was to characterize whether this population of eiders was vulnerable to a changing predator regime. Using simulated approaches of visual stimuli of both predator types, we measured eider heart rate and flight initiation distance as physiological and behavioral metrics, respectively, to characterize the perceived risk of and subsequent response to imminent threat posed by these two predators that differ in historical encounter rates. Eider heart rates were more responsive to impending visual cues of arctic foxes compared to polar bears, but birds responded behaviorally to all simulated threats with similar flight initiation distances. Results suggest eiders may not perceive the full risk that bears pose as egg and adult predators, and are therefore expected to suffer negative fitness consequences from this ongoing and increasing interaction. Eiders may therefore require conservation intervention to aid in their management. Rythme cardiaque plus élevé mais réaction de vol similaire face aux prédateurs évolués par rapport aux prédateurs récents chez un oiseau marin de l'ArctiqueRÉSUMÉ. Dans l'Arctique, la dynamique prédateur-proie change en raison des modifications qui adviennent dans la phénologie des glaces de mer. La fréquence accrue de la prédation par l'ours blanc (Ursus maritimus) d'oiseaux marins nichant en colonie et de leurs oeufs découle du fait que les ours se tournent vers les ressources alimentaires terrestres en raison de la saison de chasse aux phoques plus courte. Nous avons examiné les réactions anti-prédation d'Eiders à duvet (Somateria mollissima) nichant en colonie sur l'île d'East Bay, au Nunavut, Canada, qui sont exposés à des prédateurs de nids établis, tels que le renard arctique (Vulpes lagopus), mais aussi à une hausse récente de la prédation de nids par l'ours blanc en raison de la perte d'occasions de chasse sur la glace pour l'ours. Compte tenu de l'expérience éco-évolutive limitée des eiders avec les ours, nous avons cherché à contraster de façon expérimentale les réactions des eiders à la pression de prédation récente par les ours blancs avec celle induite par leur prédateur mammifère plus traditionnel, le renard...

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Section: Heart-rate Monitoringmentioning

confidence: 99%

Heightened heart rate but similar flight responses to evolved versus recent predators in an Arctic seabird

Geldart¹,

Love²,

Gilchrist³

et al. 2023

ACE

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“…This prey shift apparently occurs as sea ice break-up makes benthic feeding areas increasingly accessible to diving eider ducks (Sénéchal et al 2011). Since prey choice and primary production conditions are known to influence eider Hg levels, eiders that rely on lower trophic level bivalves rather than higher trophic level amphipods may accumulate less Hg (Mallory et al 2010b;Clayden et al 2015;Smith et al 2021). Thus, later laying eiders would have a reduction in Hg from exogenous sources that contribute to egg development, and subsequently less Hg to influence embryonic development.…”

Section: Influence Of Multiple Environmental Stressor Exposure On Lay...mentioning

confidence: 99%

Exposure to cumulative stressors affects the laying phenology and incubation behaviour of an Arctic-breeding marine bird

Smith

Albonaimi²,

Hennin³

et al. 2022

Science of The Total Environment

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Tracing carbon flow and trophic structure of a coastal Arctic marine food web using highly branched isoprenoids and carbon, nitrogen and sulfur stable isotopes

Amiraux

Mundy

Pierrejean

et al. 2023

Ecological Indicators

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Environmental and life-history factors influence inter-colony multidimensional niche metrics of a breeding Arctic marine bird

Cited by 9 publications

References 161 publications

Heightened heart rate but similar flight responses to evolved versus recent predators in an Arctic seabird

Heightened heart rate but similar flight responses to evolved versus recent predators in an Arctic seabird

Exposure to cumulative stressors affects the laying phenology and incubation behaviour of an Arctic-breeding marine bird

Tracing carbon flow and trophic structure of a coastal Arctic marine food web using highly branched isoprenoids and carbon, nitrogen and sulfur stable isotopes

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