Temporal changes in benthic macroinvertebrates and their interactions with fish predators after restoration in the Cheonggyecheon, a downtown stream in Seoul, Korea

Lak Jung Choe, Sang Woo Jung, Dong Gun Kim, Min Jeong Baek, Hyo Jeong Kang, Cha Young Lee, Yeon Jae Bae

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The Cheonggyecheon (Cheonggye stream), a downtown stream in Seoul, Korea, was restored by the historic Cheonggyecheon Restoration Project (2003-2005), and its discharge and other environmental conditions are artificially regulated throughout the year. The aim of this study was to assess temporal changes in benthic macroinvertebrates and their interactions with fish predators in the Cheonggyecheon. Sampling was conducted twice a year (spring and autumn) at three sections of the stream from 2006 to 2010 using a Surber sampler (50 × 50cm) for benthic macroinvertebrates and a cast net (mesh size, 10 × 10mm) and a kick net (mesh size, 5 × 5mm) for fishes. Analyses of annual precipitation and most water quality parameters showed no significant differences across the study period (P > 0.05). The species richness and density of benthic macroinvertebrates and fishes varied across the sampling period. Analyses of functional feeding groups and trophic guilds showed distinct trends, such as an increase in the number of insectivorous fish in the absence of invertebrate predators. Correlation and regression analyses for five major groups of benthic macroinvertebrates and fishes demonstrated that the density of certain groups of benthic macroinvertebrates (e.g. Tubificidae, Erpobdellidae, Baetidae, and Chironomidae) and insectivorous fishes (e.g. Gobioninae, Leuciscinae, Danioninae, and Gobiidae) were negatively correlated. In conclusion, in an artificially regulated stream like the restored Cheonggyecheon, where physical environments are nearly unchanged, fish predation can be a major factor controlling benthic macroinvertebrate communities.

Original languageEnglish
Pages (from-to)338-348
Number of pages11
JournalEntomological Research
Volume44
Issue number6
DOIs
Publication statusPublished - 2014 Jan 1

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macroinvertebrates
Korean Peninsula
predators
fish
fish nets
Tubificidae
Baetidae
Gobiidae
samplers
Chironomidae
water quality
invertebrates
autumn
predation
sampling
species diversity
environmental factors

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Temporal changes in benthic macroinvertebrates and their interactions with fish predators after restoration in the Cheonggyecheon, a downtown stream in Seoul, Korea. / Choe, Lak Jung; Jung, Sang Woo; Kim, Dong Gun; Baek, Min Jeong; Kang, Hyo Jeong; Lee, Cha Young; Bae, Yeon Jae.

In: Entomological Research, Vol. 44, No. 6, 01.01.2014, p. 338-348.

Research output: Contribution to journalArticle

Choe, Lak Jung ; Jung, Sang Woo ; Kim, Dong Gun ; Baek, Min Jeong ; Kang, Hyo Jeong ; Lee, Cha Young ; Bae, Yeon Jae. / Temporal changes in benthic macroinvertebrates and their interactions with fish predators after restoration in the Cheonggyecheon, a downtown stream in Seoul, Korea. In: Entomological Research. 2014 ; Vol. 44, No. 6. pp. 338-348.
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abstract = "The Cheonggyecheon (Cheonggye stream), a downtown stream in Seoul, Korea, was restored by the historic Cheonggyecheon Restoration Project (2003-2005), and its discharge and other environmental conditions are artificially regulated throughout the year. The aim of this study was to assess temporal changes in benthic macroinvertebrates and their interactions with fish predators in the Cheonggyecheon. Sampling was conducted twice a year (spring and autumn) at three sections of the stream from 2006 to 2010 using a Surber sampler (50 × 50cm) for benthic macroinvertebrates and a cast net (mesh size, 10 × 10mm) and a kick net (mesh size, 5 × 5mm) for fishes. Analyses of annual precipitation and most water quality parameters showed no significant differences across the study period (P > 0.05). The species richness and density of benthic macroinvertebrates and fishes varied across the sampling period. Analyses of functional feeding groups and trophic guilds showed distinct trends, such as an increase in the number of insectivorous fish in the absence of invertebrate predators. Correlation and regression analyses for five major groups of benthic macroinvertebrates and fishes demonstrated that the density of certain groups of benthic macroinvertebrates (e.g. Tubificidae, Erpobdellidae, Baetidae, and Chironomidae) and insectivorous fishes (e.g. Gobioninae, Leuciscinae, Danioninae, and Gobiidae) were negatively correlated. In conclusion, in an artificially regulated stream like the restored Cheonggyecheon, where physical environments are nearly unchanged, fish predation can be a major factor controlling benthic macroinvertebrate communities.",
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AU - Kim, Dong Gun

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AU - Kang, Hyo Jeong

AU - Lee, Cha Young

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AB - The Cheonggyecheon (Cheonggye stream), a downtown stream in Seoul, Korea, was restored by the historic Cheonggyecheon Restoration Project (2003-2005), and its discharge and other environmental conditions are artificially regulated throughout the year. The aim of this study was to assess temporal changes in benthic macroinvertebrates and their interactions with fish predators in the Cheonggyecheon. Sampling was conducted twice a year (spring and autumn) at three sections of the stream from 2006 to 2010 using a Surber sampler (50 × 50cm) for benthic macroinvertebrates and a cast net (mesh size, 10 × 10mm) and a kick net (mesh size, 5 × 5mm) for fishes. Analyses of annual precipitation and most water quality parameters showed no significant differences across the study period (P > 0.05). The species richness and density of benthic macroinvertebrates and fishes varied across the sampling period. Analyses of functional feeding groups and trophic guilds showed distinct trends, such as an increase in the number of insectivorous fish in the absence of invertebrate predators. Correlation and regression analyses for five major groups of benthic macroinvertebrates and fishes demonstrated that the density of certain groups of benthic macroinvertebrates (e.g. Tubificidae, Erpobdellidae, Baetidae, and Chironomidae) and insectivorous fishes (e.g. Gobioninae, Leuciscinae, Danioninae, and Gobiidae) were negatively correlated. In conclusion, in an artificially regulated stream like the restored Cheonggyecheon, where physical environments are nearly unchanged, fish predation can be a major factor controlling benthic macroinvertebrate communities.

KW - Aquatic insects

KW - Community dynamics

KW - Fish predation

KW - Functional feeding group

KW - Regulated stream

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