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Application of Stable Isotopic Niche Space to Large River Monitoring: Analysis of Benthic Macroinvertebrates of the Seongchon Wier

  • Journal of Environmental Impact Assessment
  • Abbr : J EIA
  • 2018, 27(6), pp.685-694
  • Publisher : Korean Society Of Environmental Impact Assessment
  • Research Area : Engineering > Environmental Engineering

서동환 1 Hye-Ji Oh ORD ID 1 Jin Mei Yan 1 Oda Yusuke 1 Kim Hyun-Woo ORD ID 2 Min-Ho Jang 3 Choi Bohyung 4 Shin, Kyung-Hoon 4 KyungLak Lee 5 Su-Woong Lee 5 Kwang-Hyeon Chang ORD ID 1

1경희대학교
2순천대학교
3공주대학교
4한양대학교
5국립환경과학원

Accredited

ABSTRACT

We measured ecological niche space (ENS) using carbon and nitrogen stable isotope ratios of benthic macroinvertebrates to estimate its applicability for large river assessment. In particular, we compared ENSs of selected macroinvertebrates between upper and lower area of Seungchon Weir in Yeongsan River to estimate the impact of weir on biological community. We also measured basic water quality and community indices including benthic macroinvertebrates index (BMI) to estimate their correlations with calculated ENS. ENS was calculated using the Bayesian Stable Isotope in R statistics (package “SIBER”). The results showed that seasonal variations in water quality and community indices were found, but there was no apparent tendency between upper and lower area of the Seungchon Weir in June (before rainy season) and August (after rainy season). However, ENS of benthic macroinvertebrates markedly decreased across the weir in both June and August regardless of changes in water quality. This means the physical change of the stream due to the weir cause decrease of ecological isotopic niche space of benthic macroinvertebrates regardless of water quality, suggesting physical modification by the weir can affect the interaction between habitat condition and macroinvertebrates. Therefore, the ecological isotopic niche space can be a useful supplementary indicator for the river ecosystem assessment.

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