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  • P-ISSN2765-2203
  • E-ISSN2765-2211

Fish Community and Habitat Environmental Characteristics in the Gudam Wetland

Proceedings of the National Institute of Ecology of the Republic of Korea, (P)2765-2203; (E)2765-2211
2022, v.3 no.1, pp.13-22
https://doi.org/10.22920/PNIE.2022.3.1.13
Yeounsu Chu (Wetlands Center, National Institute of Ecology)
Kwang-Jin Cho (Wetlands Center, National Institute of Ecology)
Hui-Seong Kim (Wetlands Center, National Institute of Ecology)
Ho-Gyeong Moon (Wetlands Center, National Institute of Ecology)
Han Kim (Wetlands Center, National Institute of Ecology)
Nak-Hyun Choi (Wetlands Center, National Institute of Ecology)
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Abstract

In this study, we investigated the water quality and fish community of the Gudam Wetland, a riverine wetland in the middle-upper reaches of the Nakdong River, during March-October 2020. The main results were as follows: average annual flow rate: 45.0±23.7 m3/s, flow velocity: 0.4±0.3 m/s, water depth: 1.4±0.4 m, water temperature: 17.5±0.8°C, pH: 7.8±0.2, electrical conductivity: 121.6±19.0 µs/cm, dissolved oxygen concentration: 11.4±0.9 mg/L, suspended solids concentration: 3.8±2.0 mg/L, and the water quality was classified as Ia (very good). A total of 754 individual fish belonging to 4 orders, 7 families, and 19 species were investigated. Cyprinidae was the dominant group, with 13 species. The dominant species was Zacco platypus (39.3%), followed by Pseudogobio esocinus (17.5%). There were 8 (42.1%) endemic Korean species and 1 exotic species, Micropterus salmoides. Four species were carnivores, six were insectivores, and nine were omnivores. Regarding tolerance to environmental changes, 6 species were tolerant, 11 had intermediate tolerance, and 2 were sensitive. Fish community analysis revealed dominance of 0.57, diversity of 2.04, evenness of 0.69, and richness of 2.72, indicating a diverse and stable fish community. The fish assessment index showed that the assessment class was B (average 62.5), which was higher than that of major streams of the Nakdong River (class C). For sustainable conservation of the Gudam Wetland, management strategies such as minimizing aggregate collection and preventing inflow of non-point pollutants are required.

keywords
Fish community Gudam Wetland Ichthyofauna Riverine wetland
Submission Date
2021-09-29
Revised Date
2021-11-15
Accepted Date
2021-11-16

Proceedings of the National Institute of Ecology of the Republic of Korea