Erratum: Corrigendum: Enhanced Southern Ocean marine productivity due to fertilization by giant icebergs

Duprat, Luis P. A. M.; Bigg, Grant R.; Wilton, David J.

doi:10.1038/ngeo2809

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“…The exact nature of the interaction between the petrels and the icebergs remains to be elucidated, but recent reports of icebergs being visited by a wide range of foraging seabirds, including Antarctic petrels [16,18], supports the view that these structures constitute important features shaping seabirds' distribution. Icebergs are associated with higher ocean net primary productivity, especially in the SIZ and POOZ, suggesting a role of hotspots of biological activity for these features [8,54,[56][57][58]. This association is relevant in the context of an observed increase in iceberg occurrence over the last decades in the southern Atlantic section of the Southern Ocean, in conjunction with global warming [7,8,53,59,60].…”

Section: Discussionmentioning

confidence: 92%

Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird

et al. 2020

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There is a paucity of information on the foraging ecology, especially individual use of sea-ice features and icebergs, over the non-breeding season in many seabird species. Using geolocators and stable isotopes, we defined the movements, distribution and diet of adult Antarctic petrels Thalassoica antarctica from the largest known breeding colony, the inland Svarthamaren, Antarctica. More specifically, we examined how sea-ice concentration and free-drifting icebergs affect the distribution of Antarctic petrels. After breeding, birds moved north to the marginal ice zone (MIZ) in the Weddell sector of the Southern Ocean, following its northward extension during freeze-up in April, and they wintered there in April–August. There, the birds stayed predominantly out of the water (60–80% of the time) suggesting they use icebergs as platforms to stand on and/or to rest. Feather δ 15 N values encompassed one full trophic level, indicating that birds fed on various proportions of crustaceans and fish/squid, most likely Antarctic krill Euphausia superba and the myctophid fish Electrona antarctica and/or the squid Psychroteuthis glacialis . Birds showed strong affinity for the open waters of the northern boundary of the MIZ, an important iceberg transit area, which offers roosting opportunities and rich prey fields. The strong association of Antarctic petrels with sea-ice cycle and icebergs suggests the species can serve, year-round, as a sentinel of environmental changes for this remote region.

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Section: Discussionmentioning

confidence: 92%

Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird

et al. 2020

View full text Add to dashboard Cite

show abstract

Erratum: Corrigendum: Enhanced Southern Ocean marine productivity due to fertilization by giant icebergs

Abstract: © 2 0 1 6 M a c m i l l a n P u b l i s h e r s L i m i t e d , p a r t o f S p r i n g e r N a t u r e . A l l r i g h t s r e s e r v e d .

Cited by 1 publication

References 1 publication

Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird

Antarctic petrels ‘on the ice rocks’: wintering strategy of an Antarctic seabird

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