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首页> 外文期刊>Aquatic Sciences >Resource partitioning among cladocerans in a littoral macrophyte zone: implications for the transfer of essential compounds
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Resource partitioning among cladocerans in a littoral macrophyte zone: implications for the transfer of essential compounds

机译：沿海大型植物区锁骨的资源分配：对必需化合物转移的影响

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摘要

The maintenance of species diversity in a given environment is strongly linked to resource partitioning. Littoral macrophyte zones are heterogeneous environments with high microcrustacean diversity, where zooplankton have dietary access to seston as well as organisms growing on macrophytic surfaces (epiphyton). We conducted a field study in a macrophyte-rich backwater of the river Allier to examine how seston and epiphyton were used as potential food sources by four dominant cladoceran species. Fatty acids were analyzed in these two food sources to assess how their differential uptake affects the trophic trajectory of essential compounds from these resources to cladocerans. Our results showed resource partitioning among the four cladocerans studied; while Eurycercus fed mostly on epiphyton, Daphnia mostly consumed phytoplankton, and Ceriodaphnia and Simocephalus were able to forage on sestonic and epiphytic resources. Based on their polyunsaturated fatty acid (PUFA) content, it was evident that epiphyton was of higher food quality than seston in this macrophyte-rich backwater system. Variability of PUFA compositions of seston and epiphyton, and diversity of foraging strategies of cladoceran species, which represent the major link between microorganisms and consumers at higher trophic levels, affect dietary energy pathways and point to a variable PUFA transfer efficiency in backwater food webs.
机译：在给定环境中维持物种多样性与资源分配密切相关。沿岸大型植物区是具有高微甲壳类多样性的异质环境，其中浮游动物在饮食上可以接触到硒以及在大型植物表面生长的生物（表藻）。我们在一条富含大型植物的阿里尔河回水中进行了实地研究，研究了四种优势锁骨物种如何将seston和epiphyton用作潜在的食物来源。对这两种食物中的脂肪酸进行了分析，以评估脂肪酸的差异摄入如何影响从这些资源到锁骨的必需化合物的营养轨迹。我们的结果表明，在研究的四个锁骨中有资源分配。 Eurycercus主要以附生为食，水蚤主要以浮游植物为食，而Ceriodaphnia和Simocephalus能够觅食雌雄同体和附生的资源。基于它们的多不饱和脂肪酸（PUFA）含量，很明显，在这种富含大型植物的回水系统中，附生植物的食物质量高于芝麻素。猪和浮游植物的PUFA组成的变异性以及锁骨鱼类的觅食策略的多样性（代表较高营养水平的微生物与消费者之间的主要联系）会影响膳食能量途径，并指出死水食物网中PUFA转移效率的变化。

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  • 来源
    《Aquatic Sciences》 |2014年第1期|73-81|共9页
  • 作者

    Helene Masclaux; Gilles Bourdier; Pascal Riera; Martin J. Kainz; Lionel Jouve; Emilie Duffaud; Alexandre Bec;

  • 作者单位

    Clermont Universite, Universite Blaise Pascal, LMGE, BP 10448, 63000 Clermont-Ferrand, France,CNRS, UMR 6023, LMGE, 63173 Aubiere, France;

    Clermont Universite, Universite Blaise Pascal, LMGE, BP 10448, 63000 Clermont-Ferrand, France,CNRS, UMR 6023, LMGE, 63173 Aubiere, France;

    UPMC Univ Paris 6, UMR 7144, Station Biologique de Roscoff, Place Georges Teissier, 29680 Roscoff, France;

    WasserCluster Lunz-Biologische Station, Dr. Carl Kupelwieser Promenade 5, 3293 Lunz am See, Austria;

    Institut Universitaire et Technologique (IUT) Mesures Physiques, 24 avenue des Landais, 63172 Aubiere, France;

    Clermont Universite, Universite Blaise Pascal, LMGE, BP 10448, 63000 Clermont-Ferrand, France,CNRS, UMR 6023, LMGE, 63173 Aubiere, France;

    Clermont Universite, Universite Blaise Pascal, LMGE, BP 10448, 63000 Clermont-Ferrand, France,CNRS, UMR 6023, LMGE, 63173 Aubiere, France;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Habitat heterogeneity; Trophic niches; Diet transfer; Polyunsaturated fatty acids; Stable isotopes;

    机译：生境异质性;营养小生境;饮食调动;多不饱和脂肪酸;稳定同位素;

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