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首页> 外文期刊>Marine biology >Deciphering the structure of the West Greenland marine food web using stable isotopes (delta C-13, delta N-15)
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Deciphering the structure of the West Greenland marine food web using stable isotopes (delta C-13, delta N-15)

机译：使用稳定同位素（δC-13，δN-15）破译西格陵兰海洋食物网的结构

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摘要

The Arctic is facing major environmental changes impacting marine biodiversity andecosystem functioning. One way of assessing the responses of an ecosystem to these changes is to quantitatively study food web dynamics. Here, we used stable isotope (delta N-15 and delta C-13) analyses of 39 Arctic marine species to investigate trophic relationships and isotopic niches of the West Greenland foodweb in 2000-2004. The lowest delta N-15 values were found for suspension feeding blue mussel (Mytilus edulis; 6.1 %) and the highest for polar bear (Ursus maritimus; 20.2 %). For delta C-13, copepods (Calanus spp.) had the lowest values (-20.4 %) and snow crab (Chionoecetes opilio) the highest values (-15.8 %). Our results show that the three trophic enrichment factor (TEF) approaches used to quantify species trophic positions (fixed TEF of 3.8 and 3.4 % or scaled TEF) did not generally affect trophic modelling and provided similar conclusions. Overall, the findings in this study are in good agreement with previous investigations of other Arctic marine ecosystems. Interestingly, we found little overlap of core isotopic niches used by the four investigated functional groups (mammals, seabirds, fish and invertebrates), except for seabirds and fish where an overlap of 24 % was found. These results provide new insights into species and functional group interactions, as well as into the food web structure and ecosystem functioning of an important Arctic region that can be used as a template to guide future modelling of carbon, energy and contaminant flow in the region.
机译：北极正面临影响海洋生物多样性和生态系统功能的重大环境变化。评估生态系统对这些变化的响应的一种方法是定量研究食物网动态。在这里，我们使用39种北极海洋物种的稳定同位素分析（δN-15和δC-13）来研究2000-2004年西格陵兰食物网的营养关系和同位素壁ni。悬浮饲喂蓝贻贝（Mytilus edulis; 6.1％）的最低N-15值最高，而北极熊（Ursus maritimus; 20.2％）最高。对于三角洲C-13，co足类（Calanus spp。）的值最低（-20.4％），雪蟹（Chionoecetes opilio）的值最高（-15.8％）。我们的结果表明，用于量化物种营养位置的三种营养富集因子（TEF）方法（固定TEF分别为3.8和3.4％或按比例缩放TEF）通常不会影响营养模型，并提供相似的结论。总体而言，这项研究的结果与先前对其他北极海洋生态系统的调查非常吻合。有趣的是，我们发现四个调查的功能组（哺乳动物，海鸟，鱼类和无脊椎动物）所使用的核心同位素壁overlap几乎没有重叠，除了海鸟和鱼类的重叠度为24％。这些结果为重要的北极地区的物种和功能组相互作用以及食物网结构和生态系统功能提供了新的见解，可用作指导该地区未来碳，能量和污染物流建模的模板。

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  • 来源
    《Marine biology》 |2016年第11期|230.1-230.15|共15页
  • 作者

    Linnebjerg Jannie Fries; Hobson Keith A.; Fort Jerome; Nielsen Torkel Gissel; Moller Per; Wieland Kai; Born Erik W.; Riget Frank F.; Mosbech Anders;

  • 作者单位

    Aarhus Univ, Dept Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark|Lund Univ, Ctr Anim Movement Res CAnMove, Solvegatan 37, S-22362 Lund, Sweden;

    Environm Canada, 11 Innovat Blvd, Saskatoon, SK S7N 3H5, Canada;

    Aarhus Univ, Dept Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark|Univ La Rochelle, CNRS, Littoral Environm & Soc LIENSs, UMR 7266, 2 Rue Olympe Gouges, F-17000 La Rochelle, France;

    Tech Univ Denmark, Natl Inst Aquat Resources, Sect Oceanog & Climate, Kavalergarden 6, DK-2920 Charlottenlund, Denmark|Greenland Inst Nat Resources, Greenland Climate Res Ctr, Nuuk, Greenland;

    Kalundborg Municipal, Hareskovvej 14-16, DK-4400 Kalundborg, Denmark;

    Tech Univ Denmark, Natl Inst Aquat Resources, Sect Monitoring & Data, Nordsoen Forskerpk,Postboks 101, DK-9850 Hirtshals, Denmark;

    Greenland Inst Nat Resources, Box 570, Nuuk 3900, Greenland;

    Aarhus Univ, Dept Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark|Aarhus Univ, Arctic Res Ctr, DK-8000 Aarhus, Denmark;

    Aarhus Univ, Dept Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark|Aarhus Univ, Arctic Res Ctr, DK-8000 Aarhus, Denmark;

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