Impact of extreme environmental conditions: Foraging behaviour and trophic ecology responses of a diving seabird, the common diving petrel

Fromant, Aymeric; Delord, Karine; Bost, Charles‐André; Eizenberg, Yonina H.; Botha, Julia; Cherel, Yves; Bustamante, Paco; Gardner, Brett R.; Brault‐Favrou, Maud; Lec’hvien, Arnaud; Arnould, John P. Y.

doi:10.1016/j.pocean.2021.102676

Cited by 20 publications

(17 citation statements)

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“…During the breeding periods 2018–2019 and 2019–2020, fairy prions exhibited significantly lower δ 15 N blood values than in 2017–2018, which also corresponded to longer foraging trip durations. A similar pattern was observed with the sympatric common diving petrel, which was explained by the cascading effects of marine heatwaves in southeastern Australia [ 31 ]. During these two successive breeding seasons, the warmer sea surface temperature is likely to have disrupted the availability of their main prey, the coastal krill, significantly impacting the breeding success of both prion and diving petrel species [ 33 ].…”

Section: Discussionsupporting

confidence: 71%

“…However, fairy prions from Poor Knights Islands (New Zealand) performed substantially shorter trips during incubation compared with those in the present study (2.4 and 5.7 days, respectively; [ 21 ]). This corresponds to the presence of a more local foraging area in northern New Zealand compared with Kanowna Island, mirroring the differences in the foraging behaviour observed between the populations of common diving petrels ( Pelecanoides urinatrix ) from these two breeding areas [ 31 , 59 ].…”

Section: Discussionmentioning

confidence: 80%

“…The GPS loggers were programmed to record locations at 20 and 10 min intervals during the incubation and chick-rearing periods, respectively. The total mass of logger attachments corresponded to 2.4 ± 0.2% of body mass (124 ± 10 g), which was unlikely to have impacted the foraging and breeding parameters of the equipped individuals [ 31 ]. Individuals were weighed (±2 g; Pesola), and bill, tarsus (±0.1 mm; Vernier callipers) and wing length (±1 mm; ruler) were measured.…”

Section: Methodsmentioning

confidence: 99%

“…Particularly, the intensification of marine heatwaves (in frequency, duration and magnitude; [ 28 ]) greatly disrupts the zooplanktonic communities [ 29 ], potentially affecting a wide range of taxa [ 30 ]. By bottom-up controls, the important decrease in zooplankton abundance during events of extreme rise of sea temperatures is likely to induce changes in the foraging behaviour of seabirds [ 31 ]. In particular, the sensitivity of coastal krill to marine heatwaves [ 23 , 32 ], and the predicted future increase in duration and frequency of such events in response to global change [ 28 ], may directly affect species such as fairy prions [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Year-round at-sea movements of fairy prions from southeastern Australia

et al. 2022

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Effective conservation assessments require detailed information of species' ecological niches during the whole annual cycle. For seabirds, this implies investigating the at-sea distribution and foraging behaviour during both the breeding and non-breeding periods. However, until recently, collecting information about small species has been precluded by the excessive size of the required devices. This lack of knowledge is exacerbated in the case of polytypic genera with species sharing very similar appearance and behaviour, such as the super-abundant prions ( Pachyptila spp.). The present study investigates the year-round at-sea distribution and foraging ecology of the fairy prion ( Pachyptila turtur ) in southeastern Australia. Miniaturized GPS loggers during the breeding season and geolocators (GLS) during the non-breeding period were used over 4 consecutive years (2017–2021), with results that highlight the importance of the continental shelf-edge waters for fairy prions throughout the year. In addition, contrary to previous assumptions, the GLS data revealed an unsuspected post-breeding migration to the waters south of Australia, during which individuals probably undergo a rapid moult of flight feathers. Understanding the at-sea distribution and ecology of prions during the whole annual cycle will be fundamental to their conservation as it can reveal species- or population-specific threats that have been overlooked because of their status as abundant species.

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Section: Discussionsupporting

confidence: 71%

Section: Discussionmentioning

confidence: 80%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Year-round at-sea movements of fairy prions from southeastern Australia

et al. 2022

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“…Among seabirds of the Southern Ocean, diving petrels ( Pelecanoides spp.) are unique in their diving (Navarro et al 2014 ) and flying abilities (Fromant et al 2021 ; Bost et al 2022 ). In the five recognized species of diving petrels (Fischer et al 2018 ; Marchant and Higgins 1990 ), the common diving petrel (CDP, Pelecanoides urinatrix ) and the South Georgian diving petrel (SGDP, Pelecanoides georgicus ) have a circumpolar distribution and breed sympatrically in several archipelagos of the Southern Ocean (Fig.…”

Section: Introductionmentioning

confidence: 99%

Stage-dependent niche segregation: insights from a multi-dimensional approach of two sympatric sibling seabirds

et al. 2022

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Niche theory predicts that to reduce competition for the same resource, sympatric ecologically similar species should exploit divergent niches and segregate in one or more dimensions. Seasonal variations in environmental conditions and energy requirements can influence the mechanisms and the degree of niche segregation. However, studies have overlooked the multi-dimensional aspect of niche segregation over the whole annual cycle, and key facets of species co-existence still remain ambiguous. The present study provides insights into the niche use and partitioning of two morphologically and ecologically similar seabirds, the common (CDP, Pelecanoides urinatrix) and the South Georgian diving petrel (SGDP, Pelecanoides georgicus). Using phenology, at-sea distribution, diving behavior and isotopic data (during the incubation, chick-rearing and non-breeding periods), we show that the degree of partitioning was highly stage-dependent. During the breeding season, the greater niche segregation during chick-rearing than incubation supported the hypothesis that resource partitioning increases during energetically demanding periods. During the post breeding period, while species-specific latitudinal differences were expected (species specific water mass preference), CDP and SGDP also migrated in divergent directions. This segregation in migration area may not be only a response to the selective pressure arising from competition avoidance between sympatric species, but instead, could reflect past evolutionary divergence. Such stage-dependent and context-dependent niche segregation demonstrates the importance of integrative approaches combining techniques from different fields, throughout the entire annual cycle, to better understand the co-existence of ecologically similar species. This is particularly relevant in order to fully understand the short and long-term effects of ongoing environmental changes on species distributions and communities.This work demonstrates the need of integrative multi-dimensional approaches combining concepts and techniques from different fields to understand the mechanism and causal factors of niche segregation.

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