Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator.
Variability in sea ice cover and climate elicit sex specific responses in an Antarctic predator.
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DOI：
10.1038/srep43236
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发表时间：
2017-02-24
影响因子：
4.6
通讯作者：
Charrassin JB
中科院分区：
文献类型：
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作者：
Labrousse S;Sallée JB;Fraser AD;Massom RA;Reid P;Hobbs W;Guinet C;Harcourt R;McMahon C;Authier M;Bailleul F;Hindell MA;Charrassin JB
过去30年来，南大洋海冰发生了截然不同的区域变化，对生态系统结构和功能产生了明显的区域影响。量化南极捕食者如何应对这种变化提供了预测气候变异/变化将如何影响这些组合到未来的背景。在11年的时间序列中，我们研究了海冰浓度和推进的年际变化如何影响南极顶级捕食者南象海豹的觅食行为。女性觅食的时间最长的海冰浓度和最早的海冰推进，而男性觅食的时间最长的冰穴在海冰浓度最低的年份。近地表纬向风异常与雌性觅食努力之间存在正相关关系，但与雄性无关。这项研究揭示了觅食的复杂性，气候强迫由极地迁徙捕食者通过不同的海冰属性和动态异常。
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.