Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Distribution Changes of Freshwater Microalgae Community in the Nakdonggang River, Korea

낙동강 담수 미세조류 군집 분포 변화

  • Suk Min Yun (Microbial Research Department, Nakdonggang National Institute of Biological Resources) ;
  • Dae Ryul Kwon (Microbial Research Department, Nakdonggang National Institute of Biological Resources) ;
  • Mirye Park (Microbial Research Department, Nakdonggang National Institute of Biological Resources) ;
  • Chang Soo Lee (Exhibition & Education Department, Nakdonggang National Institute of Biological Resources) ;
  • Sang Deuk Lee (Microbial Research Department, Nakdonggang National Institute of Biological Resources)
  • 윤석민 (국립낙동강생물자원관 미생물연구실) ;
  • 권대률 (국립낙동강생물자원관 미생물연구실) ;
  • 박미례 (국립낙동강생물자원관 미생물연구실) ;
  • 이창수 (국립낙동강생물자원관 전시교육실) ;
  • 이상득 (국립낙동강생물자원관 미생물연구실)
  • Received : 2022.12.09
  • Accepted : 2023.03.20
  • Published : 2023.03.30
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Abstract

Distribution changes in microalgae communities were studied in the Nakdonggang River at two sampling stations (St.1 Gyeongcheongyo Bridge (GB) and St.2 Daedong Wharf (DW)) at monthly intervals from January 2021 to November 2021. A total of 83 taxa included 82 species, 1 forma, belonging to 49 genera, 32 families, 21 orders, and 8 classes. The most important groups were Bacillariophyta and Chlorophyta. The number of species ranged from 5 to 24 in GB, and from 9 to 21 taxa in DW. The contribution of Bacillariophyta to the total species richness was the highest during all survey periods, and Chlorophyta yielded the next highest value in the study area. The dominant taxa were Aulacoseira ambigua, A. ambigua f. japonica, and Ulnaria acus in this study. Cluster analysis and non-metric multidimensional scaling (nMDS) analysis based on Bray- Curtis similarity identified 4 major groups, which corresponded to microalgae assemblages and their characteristic species. Correlation was analyzed through the CCA analysis. It was found that there was a correlation between the microalgae and environmental factors. It was revealed that the divided groups were distinguished because of the differences by the survey period. Therefore, seasonal change was judged as a major factor affecting the distribution of microalgae communities.

Keywords

Acknowledgement

본 연구는 국립낙동강생물자원관의 "낙동강 수계 유해 남조류의 발생 기원 추적 및 저감 기작 연구(4차년도)"(NNIBR202202102) 연구사업의 지원을 받아 수행되었습니다.

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