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首页> 外文期刊>Limnology >Trophic position and growth stages of Caddisfly (Stenopsyche marmorata Navas) larvae in the Echi River, Japan
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Trophic position and growth stages of Caddisfly (Stenopsyche marmorata Navas) larvae in the Echi River, Japan

机译：日本爱知河上Caddisfly（Stenopsyche marmorata Navas）幼虫的营养位置和生长阶段

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摘要

We investigated the trophic position of the larval filter-feeding caddisfly species—Stenopsyche marmorata Navas in the Echi River (Japan) using δ13C and δ15N measurements by instar growth stage. We also analyzed δ13C and δ15N of food sources (periphyton and suspended and benthic POM) along the course of the river. The larvae showed some degree of spatial variation in δ13C and δ15N values with a downstream increase in δ13C and δ15N values. Our results demonstrate that the trophic structure of S. marmorata of different larval stages were spatially varying, depending on food sources. Small-sized instars displayed a higher trophic position than larger instars, confirming that their non-selective feeding behavior leads to consumption of items with high δ15N values according to the spatial distribution of food sources in the riverine system.
机译：我们使用幼龄期的δ13C和δ15N测量值，研究了在日本爱知河上喂食幼体滤食性鳞翅目species虫（Stenopsyche marmorata Navas）的营养位置。我们还分析了沿河的食物来源（附生植物，悬浮和底栖POM）的δ13C和δ15N。幼虫在δ13C和δ15N值中表现出一定程度的空间变化，而在下游增加δ13C和δ15N值。我们的结果表明，不同幼体阶段的S. marmorata的营养结构在空间上会有所不同，具体取决于食物来源。小型幼虫的营养位置比大型幼虫高，这表明它们的非选择性摄食行为导致了根据河系食物源的空间分布而消耗了具有较高δ15N值的食物。

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  • 来源
    《Limnology》 |2013年第3期|283-291|共9页
  • 作者

    Hyun-Seon Shin; Nozomi Amahashi; Osamu Mitamura;

  • 作者单位

    Limnology Laboratory The Graduate School of Environmental Science The University of Shiga Prefecture">(1);

    Limnology Laboratory The Graduate School of Environmental Science The University of Shiga Prefecture">(1);

    Limnology Laboratory The Graduate School of Environmental Science The University of Shiga Prefecture">(1);

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Stable isotopes; Filter feeding larval caddisfly; Food sources; Trophic level;

    机译：稳定同位素;滤食幼虫虫;食物来源;营养级;

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