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Ecological informatics approach to screening of integrity metrics based on benthic macroinvertebrates in streams

Published online by Cambridge University Press:  08 July 2011

Woon-Seok Cho
Affiliation:
Department of Biological Sciences, Pusan National University, Busan 609-735, Republic of Korea
Young-Seuk Park
Affiliation:
Department of Biology, Kyung Hee University, Seoul 130-701, Republic of Korea
Hae-Kyung Park
Affiliation:
Water Environment Research Department, The National Institute of Environmental Research, Incheon 404-170, Republic of Korea
Hak-Yang Kong
Affiliation:
Water Environment Research Department, The National Institute of Environmental Research, Incheon 404-170, Republic of Korea
Tae-Soo Chon*
Affiliation:
Department of Biological Sciences, Pusan National University, Busan 609-735, Republic of Korea
*
*Corresponding author: tschon@pusan.ac.kr

Abstract

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Benthic macroinvertebrates are considered as a representative taxon that indicates the ecological status of freshwater ecosystems. Numerous indices derived from community data have been proposed to estimate either biological water quality or ecosystem health. In this study, metrics based on benthic macroinvertebrates at the family level were screened using ecological informatics to provide a multi-metric measurement that would be suitable for presenting ecological integrity across different levels of environmental impact. Benthic macroinvertebrates were collected at a total of 720 sample sites from river basins and streams in Korea in 2009. Based on four categories of community status (i.e., diversity, richness, tolerance, and composition), 37 metrics were selected as initial candidates according to the literature. The candidate metrics were evaluated according to parameters including discriminatory power, redundancy, and responsiveness to stressors. Self-organizing map was utilized to assist the screening procedure by providing ordination, clustering, and visualization of metric and environmental data. Six metrics were finally selected as a multi-metric and were compared with conventional indicators for presenting the ecological integrity of streams.