Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Taxonomic Characteristics of Chironomids Larvae from the Hangang River at the Genus Level.

한강 수계 내 서식하는 깔따구류 유충의 속 수준에서의 분류 형질

  • Jae-Won Park (Department of Environment Oceanography, Chonnam National University) ;
  • Bong-Soon Ko (Department of Environment Oceanography, Chonnam National University) ;
  • Hyunsu Yoo (Fisheries Science Institute, Chonnam National University) ;
  • Dongsoo Kong (Department of Life Science, Kyonggi University) ;
  • Ihn-Sil Kwak (Department of Environment Oceanography, Chonnam National University)
  • Received : 2023.06.09
  • Accepted : 2023.06.30
  • Published : 2023.06.30
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Abstract

The Hangang River* is necessary to manage the water environment of severe pollution due to the high density of residential areas, parks, and agriculture and the large population concentrated there. Benthic macroinvertebrates, such as chironomids larvae, are bioindicator species that reflect environmental changes and are crucial for water quality monitoring. In this study, we investigated morphological characteristics and molecular analysis of the chironomids larvae inhabiting the Hangang River area for water environment surveys. For this research, 20 rivers, lakes, and urban area in the Hangang River basin were selected. Chironomids larvae were collected from July to September 2022, and their appearance and characteristics were identified through morphological identification. In addition, phylogenetic analysis was performed based on the mtCOI gene sequences of the collected chironomids larvae, and identification at the genus level was confirmed. As a result, 32 species and 18 genera of 3 subfamilies of Chironomidae larvae were identified, and Stictochironomus sp. dominated most sites(6 sites). The morphological characteristics of the identified chironomids larvae, such as the mentum, ventromental plate, and antenna, were organized into table and pictorial keys, and a Bayesian inference molecular phylogeny was presented. These results provide basic morphological information for genus-level identification and can be used as fundamental information for water quality management.

깔따구류 유충(Chironomidae larvae)은 저서성대형무척추동물로 수질 및 환경오염 생물 모니터링에 중요한 지표생물이다. 본 연구에서는 2022년 7월에서 9월 동안 한강의 다양한 수계에서 서식하는 깔따구류 유충을 채집하여 형태적 동정 및 유전자 계통 분석을 실시하였다. 20개 지점에서 총 3아과 18속 32종의 깔따구류 유충이 출현하였으며, 반지깔따구속에 속하는 1개 종이 6개 지점에서 우점하였다. 깔따구류 유충을 분류하는 데 이용하는 몸통, 두부, 하순기절, 촉각 등을 관찰하여 특징을 Pictorial key로 제시하였고, 유전자 계통분석 결과 3개 아과가 명확하게 구분되었으며, 속 수준에서도 구분이 되었다. 이러한 결과들은 깔따구류 유충 동정에 도움이 될 것이고, 수질 조사 및 관리에 기초적인 자료로 활용할 것으로 기대된다.

Keywords

Acknowledgement

본 결과물은 한국연구재단의 지원 (NRF-2018-R1A6A1A-03024314)을 받아 연구되었습니다. 본 연구는 환경부(MOE) 수생태계 보전 연구사업과 한국환경산업기술원(KEIRI)의 지원을 받아 연구되었습니다(2021003050001 and 2022003050006).

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