Journal of Climate Change Research (한국기후변화학회지)

The Korean Society of Climate Change Research (한국기후변화학회)
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Characteristics of Macroinvertebrates Food Webs affected by Dry Channel in an Intermittent Stream System of the Echi River in Japan

  • Shin, Hyun-Seon (Limnological Laboratory Environmental Science Graduate School, University of Shiga Prefecture) ;
  • Nozomi, Amahashi (Limnological Laboratory Environmental Science Graduate School, University of Shiga Prefecture) ;
  • Na, Young-Eun (R&D Coordination Division (Climate Change), Rural Development Administration) ;
  • Park, Hong-Hyun (R&D Coordination Division (Climate Change), Rural Development Administration) ;
  • Cho, Kwang-Jin (National Institute of Ecology) ;
  • Seo, Ye-Ji (National Institute of Ecology) ;
  • Osamu, Mitamura (Limnological Laboratory Environmental Science Graduate School, University of Shiga Prefecture)
  • Received : 2015.07.27
  • Accepted : 2015.09.01
  • Published : 2015.09.29
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Abstract

The purpose of study is to identify trophic pathways from organic matter to macroinvertebrates in terms of the consumer and to characterize the food webs in an intermittent stream system of the Echi River in Japan. The ${\delta}^{13}C$ values of macroinvertebrates and their potential food sources indicated the scraper (Psephenoides spp., Ecdyonurus levis) and collector-gatherer (Ephemera strigata, Paraleptonphlebia chocolata) feed on periphyton and POM (particulate organic matter) in situ. Davidius lunatus, and Hexatoma spp., which were identified as predators, may feed upon Ephemera strigata and Stenelmis larvae, respectively. At station characterized by seepage water, the ${\delta}^{15}N$ values of Ecdyonurus levis, Lymnaea auricularia, and Rhyacophila nigrocephala larva probably showed relatively lower values according to its diets. Even in homogenous species, the trophic pathways of macroinvertebrates in situ exhibited considerable variation; this reflected the trophic pathways from organic matter to the consumer depending on habitat characteristics in stream.

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