Data from: Extreme ecological response of a seabird community to unprecedented sea ice cover

• Main Authors: Barbraud, Christophe, Delord, Karine, Weimerskirch, Henri, Barbraud, C., Delord, K., Weimerskirch, H.
• Format: Dataset
• Language: unknown
• Published: Data Archiving and Networked Services (DANS) 2021
• Subjects: Life sciences; medicine and health care; petrels; sea ice; penguins; skuas; Breeding; Antarctic; geo; envir; D'Urville Sea; Dumont d'Urville; Dumont-d'Urville; East Antarctica; Antarc*; Antarctica; Dumont D'Urville Sea; Sea ice
• Online Access: https://doi.org/10.5061/dryad.3c2v9

Climate change has been predicted to reduce Antarctic sea ice but, instead, sea ice surrounding Antarctica has expanded over the past 30 years, albeit with contrasted regional changes. Here we report a recent extreme event in sea ice conditions in East Antarctica and investigate its consequences on a seabird community. In early 2014, the Dumont d'Urville Sea experienced the highest magnitude sea ice cover (76.8%) event on record (1982–2013: range 11.3–65.3%; mean±95% confidence interval: 27.7% (23.1–32.2%)). Catastrophic effects were detected in the breeding output of all sympatric seabird species, with a total failure for two species. These results provide a new view crucial to predictive models of species abundance and distribution as to how extreme sea ice events might impact an entire community of top predators in polar marine ecosystems in a context of expanding sea ice in eastern Antarctica. Seabird and seaice dataBreeding success data and sea ice concentration datascriptR script for the segmented analyses and Davies tests