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http://dx.doi.org/10.13047/KJEE.2018.32.3.274

Fish Distribution and Management Strategy for Improve Biodiversity in Created Wetlands Located at Nakdong River Basin  

Choi, Jong Yun (Division of Ecological Assessment, National Institute of Ecology)
Kim, Seong-Ki (Division of Ecological Assessment, National Institute of Ecology)
Park, Jung-Soo (Division of Ecological Assessment, National Institute of Ecology)
Kim, Jeong-Cheol (Division of Ecological Assessment, National Institute of Ecology)
Yoon, Jong-Hak (Division of Ecological Assessment, National Institute of Ecology)
Publication Information
Korean Journal of Environment and Ecology / v.32, no.3, 2018 , pp. 274-288 More about this Journal
Abstract
This study investigated the environmental factors and fish assemblage in 42 wetlands between spring and autumn of 2017 to evaluate the fish distribution and deduce the management strategy for improving biodiversity in created wetlands located at the Nakdong River basin. The investigation identified a total of 30 fish species and found that the most of wetlands were dominated by exotic fishes such as Micropterus salmoides and Lepomis macrochirus. Fish species such as Rhinogobius brunneus, Opsariichthys uncirostris amurensis, Zacco platypus were less abundant in the area with high density of Micropterus salmoides (static area) because they preferred the environment with active water flow. The pattern analysis of fish distribution in each wetland using the self-organizing map (SOM) showed a total of 24 variables (14 fish species and 10 environmental variables). The comparison of variables indicated that the distribution of fish species varied according to water depth and plant cover rate and was less affected by water temperature, pH, and dissolved oxygen. The plant cover rate was strongly associated with high fish density and species diversity. However, wetlands with low plant biomass had diversity and density of fish species. The results showed that the microhabitat structure, created by macrophytes, was an important factor in determining the diversity and abundance of fish communities because the different species compositions of macrophytes supported diverse fish species in these habitats. Based on the results of this study, we conclude that macrophytes are the key components of lentic freshwater ecosystem heterogeneity, and the inclusion of diverse plant species in wetland construction or restoration schemes will result in ecologically healthy food webs.
Keywords
EXOTIC FISH; SELF-ORGANZING MAP(SOM); BIODIVERSITY; PHYSICO-CHEMICAL FACTORS; INHABITED HABITAT;
Citations & Related Records
연도 인용수 순위
  • Reference
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