Supplementary material from "Timing of ice retreat alters seabird abundances and distributions in the southeast Bering Sea"
Posted on 2016-09-13 - 07:41
Timing of spring sea-ice retreat shapes the southeast Bering Sea food web. We compared summer seabird densities and average bathymetry depth-distributions between years with early (typically warm) and late (typically cold) ice-retreat. Averaged over all seabird species, densities in early-ice-retreat-years were 10.1% (95%CI: 1.1–47.9%) of that in late-ice-retreat-years. In early-ice-retreat-years, surface-foraging species had increased numbers over the middle shelf (50–150 m) and reduced numbers over the shelf slope (200–500 m). Pursuit-diving seabirds showed a less clear trend. Euphausiids and the copepod Calanus marshallae/glacialis were 2.4 and 18.1 times less abundant in early-ice-retreat-years, respectively, whereas age-0 walleye pollock Gadus chalcogrammus near-surface densities were 51× higher in early-ice-retreat-years. Our results suggest a mechanistic understanding of how present and future changes in sea-ice-retreat timing may affect top predators like seabirds in the southeastern Bering Sea.
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Renner, Martin; Salo, Sigrid; Eisner, Lisa B.; Ressler, Patrick; Ladd, Carol; J. Kuletz, Kathy; et al. (2016). Supplementary material from "Timing of ice retreat alters seabird abundances and distributions in the southeast Bering Sea". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3464553.v1
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AUTHORS (10)
MR
Martin Renner
SS
Sigrid Salo
LE
Lisa B. Eisner
PR
Patrick Ressler
CL
Carol Ladd
KJ
Kathy J. Kuletz
JA
Jarrod A. Santora
JP
John F. Piatt
GD
Gary S. Drew
GH
George L. Hunt