plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111 | elSSN : 2287-8815
plSSN : 0374-8111elSSN : 2287-8815
eDNA Metabarcoding-Based Comparison of Fish Community Structureand Diel Distribution Patterns in the Coastal Waters of Samcheok andTaean, Korea
고윤지·Shantanu Kundu1·오태건2·김아란3·이경훈4·강경미1·장영주5·강혜은6*
국립부경대학교 4차산업융합바이오닉스공학과, 1국립부경대학교 해양수산개발국제협력연구소, 2한국수산자원공단, 3국립부경대학교 해양바이오닉
스융합기술센터, 4국립부경대학교 해양생산시스템관리학부, 5국립부경대학교 해양수산형질전환생물연구소, 6국립부경대학교 해양생명과학연구소
We investigated variations in diel fish communities and compared the structures of two oceanographically distinct coastal regions using environmental DNA (eDNA) metabarcoding. Surface seawater was sampled from Samcheok (East Sea) and Taean (Yellow Sea) between June and December 2020. A total of 128 samples were pooled into 16 representative groups based on the sampling period and diel phase. Analysis using MiFish universal primers identified 87 species across 26 orders and 56 families. eDNA exhibited high sensitivity, detecting up to 4.7 times more species in Samcheok than traditional gear-based surveys. While the community structure did not vary significantly between day and night, specific species, such as Sebastes sp. and Engraulis japonicus exhibited distinct diel activity, with high ecological resolution. The seasonal variability associated with temperature fluctuations and significant regional differences were observed, alongside site-specific haplotype distribution in sedentary species. eDNA metabarcoding reflects coastal fish community dynamics beyond simple species lists, providing a critical baseline for long-term biodiversity monitoring in Korean coastal waters.
eDNA metabarcoding, Marine fish community, Diel variation, Haplotype distribution, Biodiversity monitoring