Comparative Analysis of Benthic Macroinvertebrate Communities Before and After the Restoration Project in the Kyoungan Stream

Kim, PilJae; Kim, Jin‐Young; Son, Se-Hwan; Won, Doo-Hee; Kong, Dongsoo

doi:10.15681/kswe.2016.32.1.15

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…Notably, the T-P concentration drastically improved, likely owing to the execution of reduction plans (advanced treatment) under the TMDL. This supports the results of previous studies that showed the expansion of STPs in the watershed following implementation of the TMDL: the construction of public STPs and the installation of T-P treatment facilities have strengthened discharge water quality standards [20].…”

Section: Improvement In Water Qualitysupporting

confidence: 90%

“…Paldang Reservoir is a critical water source, and it is crucial to manage the quality of the water draining into it. Despite the numerous studies conducted in this regard [17][18][19][20][21][22][23] and certain improvements in water quality, the area continues to suffer from severe eutrophication [24]. The Gyeongan stream watershed has undergone continuous urbanization; therefore, changes in the water quality can effectively reveal pollutant efflux characteristics.…”

Section: Research Areamentioning

confidence: 99%

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Log-Linear Model and Delivery Load Analysis for Improvements in Water Quality through TMDL in the Gyeongan Stream Watershed, Republic of Korea

Im,

Woo,

Kong

2024

Sustainability

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The effectiveness of implementing the total maximum daily load (TMDL) in the Gyeongan stream watershed was evaluated to assess its impact on water quality. The relationships between water quality and flow rate and load and water quality were reinterpreted using a log-linear model and the delivery load, respectively. To estimate annual water quality trends and analyze the effects of water quality improvement in each parameter, an improved multivariable log-linear model addressing the limitations of the traditional L-Q equation was applied to analyze the relationship between water quality and flow rate, excluding the effects of flow rate and seasonality. The effect of total phosphorus (T-P) was particularly prominent. A new delivery load was developed and applied to address the limitations of the original unit-based delivery load. Evaluations showed that water quality continuously improved across all parameters, and all methods (excluding the influence of flow rate on water quality fluctuations) were highly effective in estimating water quality changes attributable to anthropogenic pollution sources. The analysis of pollutant contributions revealed that managing point sources is necessary for controlling the biochemical oxygen demand and total nitrogen, while point and non-point sources require T-P management. Future policy development should consider this when formulating management strategies.

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Section: Improvement In Water Qualitysupporting

confidence: 90%

Section: Research Areamentioning

confidence: 99%

Log-Linear Model and Delivery Load Analysis for Improvements in Water Quality through TMDL in the Gyeongan Stream Watershed, Republic of Korea

Im,

Woo,

Kong

2024

Sustainability

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“…Amongst the various aquatic organisms found in streams or rivers, benthic macroinvertebrates have unique functional forms, based on the physical or chemical conditions. As a result, benthic organisms have been largely used as bioindicators for assessing water quality and the health of aquatic habitats, based on these properties ( Rosenberg et al 1986 , Smith et al 1999 , Barman and Gupta 2015 , Kim and Kong 2019 ). Therefore, aquatic insects present an intermediate trophic level consumer and are indispensable in channeling the trophic web from bottom-up and top-down directions ( Wallace and Webster 1996 , Doong et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of functional feeding groups (FFG) structure of aquatic insects in North- western Rif - Morocco

El Yaagoubi,

El Alami,

Harrak

et al. 2023

BDJ

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The involvement of trait-based approaches is crucial for understanding spatial patterns, energy flow and matter transfer in running water systems, which requires consistent knowledge of the functional structures of aquatic communities, with the advantage of combining physical properties and behavioral mechanisms of food acquisition rather than the taxonomic group. The present study indicated how functional feeding groups may be used as a proxy for classical taxonomic evaluation, as well as the potential interest in incorporating them as indicators of anthropogenic stressors. The composition and abundance of the functional feeding groups of aquatic insects were examined from September 2021 to August 2022 along the Western Rif Region. Benthic samples were collected from nine sampling points in the studied area using a Surber sampler with a mesh size of 500 µm and a diameter of 20*20 cm. The stations included in this work were chosen for their accessibility as well as their position on the hydrographic systems. The abundance of sampled aquatic organisms in the whole study area revealed 5,342 individuals belonging to 60 families and seven orders of aquatic insects, classified into five feeding functional groups. In terms of abundance, Collector-gatherers (Ephemeroptera and Diptera) were the most abundant trophic group at most of the sites, with a proportion of 38.47%. Predators (Coleoptera, Hemiptera and Odonata) were the second group at all sites, followed by Collector-filters, accounting for 39.53%, 28.14% and 22.37% respectively, while Scarpers and Shredders had the lowest representation across all sites with 4.16%. The high number of registered Collectors could be related to their ability to feed on a diverse range of food items compared to the remaining trophic guilds. According to the Canonical Correspondence Analysis results, physicochemical (i.e. T, pH, BOD5, Cl- and NO3-) and hydromorphological (i.e. current velocity and depth) variables were amongst the key predictors of shaping the functional structure of aquatic biota during this investigation. It is highly recommended to carry out suitable measures to largely attenuate anthropogenic pressures in order to preserve the integrity of freshwater bodies and their biota.

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“…In terms of streambed substate types, Psephophilous was the most dominant, accounting for 44.8% of the total, followed by Lithophilous at 36.8%, and Moderate at 18.4% in the assemblage composition. Kim et al (2017) have classified microhabitats into nine types based on distribution characteristics of benthic macroinvertebrates according to water depth, current velocity, and substrate type in streams (Table 7). In this study, using the Weibull model, the median (depth of 19.58 cm, current velocity of 22.28 cm s -1 , and substrate of -4.14) and mean (depth of 21.70 cm, current velocity of 24.22 cm s -1 , and substrate of -4.17) values of environmental factors for C. similis were applied.…”

Section: Discussionmentioning

confidence: 99%

Physical habitat characteristics of freshwater crayfish Cambaroides similis (Koelbel, 1892) (Arthropoda, Decapoda) in South Korea

Kim,

Kwon,

Kim

et al. 2023

J Ecol Environ

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Background: Cambaroides similis is an endangered candidate species living in the stream of South Korea. Freshwater crayfish is known to decline rapidly not only domestically, but also internationally. Its decline is projected to be further exacerbated due to climate change. Understanding physical characteristics of the habitat is crucial for the conservation of an organism. However, comprehensive data regarding the distribution and physical habitat characteristics of C. similis are currently unavailable in South Korea. Thus, the objective of this study was to ascertain preferred ranges for water depth, current velocity, and streambed substrate of C. similis using Weibull model. Results: In this study, C. similis was found at 59 sites across 12 regions in South Korea. Its optimal water depth preferences ranged from 11.9 cm to 30.1 cm. Its current velocity preferences ranged from 9.8 cm s -1 to 29.1 cm s -1 . Its substrate preferences ranged from -5.1 Φ m to -2.5 Φ m . Median values of central tendency were determined as follows: water depth of 21.4 cm, current velocity of 21.2 cm s -1 , and substrate of -4.1 Φ m . Mean values of central tendency were determined as follows: water depth of 21.8 cm, current velocity of 22.0 cm s -1 , and substrate of -4.4 Φ m . Mode values of central tendency were determined as follows: water depth of 21.7 cm, current velocity of 20.1 cm s -1 , and substrate of -3.7 Φ m . Conclusions: Based on habitat suitability analysis, physical microhabitat characteristics of C. similis within a stream were identified as Run section with coarse particle substrate, low water depth, and slow current velocity. Due to high sensitivity of these habitats to environmental changes, prioritized selection and assessment of threats should be carried out as a primary step.

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Comparative Analysis of Benthic Macroinvertebrate Communities Before and After the Restoration Project in the Kyoungan Stream

Cited by 6 publications

References 5 publications

Log-Linear Model and Delivery Load Analysis for Improvements in Water Quality through TMDL in the Gyeongan Stream Watershed, Republic of Korea

Log-Linear Model and Delivery Load Analysis for Improvements in Water Quality through TMDL in the Gyeongan Stream Watershed, Republic of Korea

Assessment of functional feeding groups (FFG) structure of aquatic insects in North- western Rif - Morocco

Physical habitat characteristics of freshwater crayfish Cambaroides similis (Koelbel, 1892) (Arthropoda, Decapoda) in South Korea

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