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首页> 外文期刊>Marine biology >Trophic diversity in amphipods within a temperate eelgrass ecosystem as determined by gut contents and C and N isotope analysis
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Trophic diversity in amphipods within a temperate eelgrass ecosystem as determined by gut contents and C and N isotope analysis

机译：通过肠道含量以及碳和氮同位素分析确定的温带鳗草生态系统内两栖动物的营养多样性

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A conjoint analysis of gut contents and stable C and N isotopes was applied to determine the main food sources and feeding habits of dominant amphipods in an eelgrass bed (Zostera marina) in Gwangyang Bay, Korea. Gut content observations demonstrated that, while Gammaropsis japonicus and Jassa slatteryi are herbivorous, feeding on epiphytes and detritus, Pontogeneia rostrata and Monocorophium acherusicum are omnivorous, feeding on mesozooplankton fragments and detritus. Stable isotope data confirmed that epiphytes, detritus, and mesozooplankton fragments were major food sources for amphipods in the eelgrass bed. Isotopic mixing model calculations clearly showed an interspecific difference in diet composition. A high isotopic dissimilarity between amphipod taxa demonstrated interspecific trophic diversity, reflecting their herbivorous (G. japonicus and J. slatteryi) and omnivorous (P. rostrata and M. acherusicum) feeding habits and confirmed the detrivorous feeding habits of caprellids. Such trophic diversity at interspecific level of the amphipod species indicates that they use different food resources within their microhabitats and play species-specific functional roles as mediators in trophic pathways from producers to higher-level consumers of the eelgrass ecosystem. Finally, our findings suggest that information on the species-specific trophic ecology of amphipods is needed to better understand their potential role in the trophic dynamics and carbon flow of seagrass bed ecosystems.
机译：结合肠道含量和稳定的碳，氮同位素分析，确定了韩国光阳湾鳗鱼床（带状疱疹）中主要两栖动物的主要食物来源和摄食习惯。肠道含量的观察结果表明，尽管日本线虫和草食为草食性，但以附生植物和碎屑为食，罗氏蓬松和无叶单壳动物为食性，以中生浮游动物的碎片和碎屑为食。稳定的同位素数据证实，附生植物，碎屑和中层浮游生物碎片是鳗鱼床中两栖动物的主要食物来源。同位素混合模型计算清楚地表明了饮食组成之间存在种间差异。两栖类类群之间的高度同位素差异表明种间营养多样性，反映了它们的草食性（G. japonicus和J. slatteryi）和杂食性（P. rostrata和M. acherusicum）的进食习惯，并证实了cap鱼的有害进食习惯。在两栖动物物种的种间水平上，这种营养多样性表明它们在其微生境内使用了不同的食物资源，并在从鳗鱼生态系统的生产者到更高层次的消费者的营养途径中，发挥了特定于物种的功能作用。最后，我们的发现表明需要有关两栖动物特定物种营养生态学的信息，以更好地了解它们在海草床生态系统营养动力学和碳流中的潜在作用。

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    《Marine biology》 |2012年第9期|p.1943-1954|共12页
  • 作者

    Seung Jin Jeong; Hae-Lip Suh; Chang-Keun Kang;

  • 作者单位

    POSTECH Ocean Science and Technology Institute,Pohang University of Science and Technology,Pohang 790-784, Republic of Korea;

    Institute of Marine Science, Faculty of Earth Systems and Environmental Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea;

    POSTECH Ocean Science and Technology Institute,Pohang University of Science and Technology,Pohang 790-784, Republic of Korea;

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