Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator

Sara Labrousse; Jean-Baptiste Sallee; Alexander D. Fraser; Rob A. Massom; Phillip Reid; William Hobbs; Christophe Guinet; Robert Harcourt; Clive McMahon; Matthieu Authier; Frederic Bailleul; Mark A. Hindell; Jean Benoit Charrassin

doi:10.1038/srep43236

Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator

Sara Labrousse^*, Jean-Baptiste Sallee, Alexander D. Fraser, Rob A. Massom, Phillip Reid, William Hobbs, Christophe Guinet, Robert Harcourt, Clive McMahon, Matthieu Authier, Frederic Bailleul, Mark A. Hindell, Jean Benoit Charrassin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Contrasting regional changes in Southern Ocean sea ice have occurred over the last 30 years with distinct regional effects on ecosystem structure and function. Quantifying how Antarctic predators respond to such changes provides the context for predicting how climate variability/change will affect these assemblages into the future. Over an 11-year time-series, we examine how inter-annual variability in sea ice concentration and advance affect the foraging behaviour of a top Antarctic predator, the southern elephant seal. Females foraged longer in pack ice in years with greatest sea ice concentration and earliest sea ice advance, while males foraged longer in polynyas in years of lowest sea ice concentration. There was a positive relationship between near-surface meridional wind anomalies and female foraging effort, but not for males. This study reveals the complexities of foraging responses to climate forcing by a poleward migratory predator through varying sea ice property and dynamic anomalies.

Original language	English
Article number	43236
Pages (from-to)	1-13
Number of pages	13
Journal	Scientific Reports
Volume	7
DOIs	https://doi.org/10.1038/srep43236
Publication status	Published - 24 Feb 2017

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

SOUTHERN ELEPHANT SEALS
DEEP DIVING PREDATOR
PACK-ICE
ATMOSPHERIC CIRCULATION
EAST ANTARCTICA
WEDDELL SEA
KRILL
ECOSYSTEM
BEHAVIOR
TRENDS

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title = "Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator",

abstract = "Contrasting regional changes in Southern Ocean sea ice have occurred over the last 30 years with distinct regional effects on ecosystem structure and function. Quantifying how Antarctic predators respond to such changes provides the context for predicting how climate variability/change will affect these assemblages into the future. Over an 11-year time-series, we examine how inter-annual variability in sea ice concentration and advance affect the foraging behaviour of a top Antarctic predator, the southern elephant seal. Females foraged longer in pack ice in years with greatest sea ice concentration and earliest sea ice advance, while males foraged longer in polynyas in years of lowest sea ice concentration. There was a positive relationship between near-surface meridional wind anomalies and female foraging effort, but not for males. This study reveals the complexities of foraging responses to climate forcing by a poleward migratory predator through varying sea ice property and dynamic anomalies.",

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AU - Labrousse, Sara

AU - Sallee, Jean-Baptiste

AU - Fraser, Alexander D.

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AU - Reid, Phillip

AU - Hobbs, William

AU - Guinet, Christophe

AU - Harcourt, Robert

AU - McMahon, Clive

AU - Authier, Matthieu

AU - Bailleul, Frederic

AU - Hindell, Mark A.

AU - Charrassin, Jean Benoit

N1 - Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

PY - 2017/2/24

Y1 - 2017/2/24

N2 - Contrasting regional changes in Southern Ocean sea ice have occurred over the last 30 years with distinct regional effects on ecosystem structure and function. Quantifying how Antarctic predators respond to such changes provides the context for predicting how climate variability/change will affect these assemblages into the future. Over an 11-year time-series, we examine how inter-annual variability in sea ice concentration and advance affect the foraging behaviour of a top Antarctic predator, the southern elephant seal. Females foraged longer in pack ice in years with greatest sea ice concentration and earliest sea ice advance, while males foraged longer in polynyas in years of lowest sea ice concentration. There was a positive relationship between near-surface meridional wind anomalies and female foraging effort, but not for males. This study reveals the complexities of foraging responses to climate forcing by a poleward migratory predator through varying sea ice property and dynamic anomalies.

AB - Contrasting regional changes in Southern Ocean sea ice have occurred over the last 30 years with distinct regional effects on ecosystem structure and function. Quantifying how Antarctic predators respond to such changes provides the context for predicting how climate variability/change will affect these assemblages into the future. Over an 11-year time-series, we examine how inter-annual variability in sea ice concentration and advance affect the foraging behaviour of a top Antarctic predator, the southern elephant seal. Females foraged longer in pack ice in years with greatest sea ice concentration and earliest sea ice advance, while males foraged longer in polynyas in years of lowest sea ice concentration. There was a positive relationship between near-surface meridional wind anomalies and female foraging effort, but not for males. This study reveals the complexities of foraging responses to climate forcing by a poleward migratory predator through varying sea ice property and dynamic anomalies.

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KW - PACK-ICE

KW - ATMOSPHERIC CIRCULATION

KW - EAST ANTARCTICA

KW - WEDDELL SEA

KW - KRILL

KW - ECOSYSTEM

KW - BEHAVIOR

KW - TRENDS

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JO - Scientific Reports

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M1 - 43236

ER -

Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator

Abstract

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Keywords

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