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首页> 外文期刊>Polar biology >Trophic segregation of Falkland Islands seabirds: insights from stable isotope analysis
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Trophic segregation of Falkland Islands seabirds: insights from stable isotope analysis

机译：福克兰群岛海鸟的营养隔离：稳定同位素分析的见解

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摘要

Seabird colonies provide rare opportunities to study trophic segregation in an entire bird community. We here present data on nitrogen and carbon isotope ratios of eight species of seabirds from New Island, Falkland Islands, and compare trophic levels (TL) and foraging distributions. We included adult feathers representing the interbreeding season, as well as chick feathers or down representing the breeding season. The stable isotope ratios indicated differences in feeding areas and TLs between species, consistent with the data of previous conventional diet analyses and observations at sea. We further reviewed conventional and stable isotope seabird community studies calculating the means and ranges of TLs observed across these studies. The mean TL (3.7) of the seabird community on New Island was at the lower end of the mean value range (3.5-4.5), but not significantly different, from the reviewed seabird communities. Seabirds on New Island had a range of 1.3 TLs, which is on the upper end of ranges within a community (0.4-1.5), indicating strong trophic structuring.
机译：海鸟殖民地提供了难得的机会来研究整个鸟类群落中的营养隔离。我们在这里提供来自福克兰群岛新岛的八种海鸟氮和碳同位素比的数据，并比较营养水平（TL）和觅食分布。我们包括代表杂交季节的成年羽毛，以及代表繁殖季节的鸡毛或羽绒。稳定的同位素比表明物种之间的摄食面积和TL之间存在差异，这与以前的常规饮食分析和海上观测数据一致。我们进一步回顾了常规和稳定的同位素海鸟群落研究，计算了在这些研究中观察到的TL的平均值和范围。新岛海鸟群落的平均TL（3.7）处于平均值范围的下限（3.5-4.5），但与所审查的海鸟群落没有显着差异。新岛上的海鸟有1.3个TL的范围，位于一个社区范围内的上限（0.4-1.5），表明其营养结构很强。

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  • 来源
    《Polar biology》 |2009年第12期|1753-1763|共11页
  • 作者

    Felix Weiss; Robert W. Furness; Rona A. R. McGill; Ian J. Strange; Juan F. Masello; Petra Quillfeldt;

  • 作者单位

    Max-Planck-Institut fuer Ornithologie, Vogelwarte Radolfzell, Schlossallee 2, 78315 Radolfzell, Germany;

    Faculty of Biomedical and Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK;

    NERC Life Sciences Mass Spectrometry Facility, Scottish Universities Environmental Research Centre, East Kilbride, Glasgow G75 OQF, UK;

    New Island Conservation Trust, The Dolphins, Stanley, Falkland Islands;

    Max-Planck-Institut fuer Ornithologie, Vogelwarte Radolfzell, Schlossallee 2, 78315 Radolfzell, Germany;

    Max-Planck-Institut fuer Ornithologie, Vogelwarte Radolfzell, Schlossallee 2, 78315 Radolfzell, Germany;

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  • 正文语种 eng
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  • 关键词

    stable isotopes; seabird colonies; trophic level; falkland islands; dietary segregation;

    机译：稳定同位素海鸟殖民地;营养级福克兰群岛;饮食隔离;

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