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Article

Characterization of Trophic Structure of Fish Assemblages in the East and South Seas of Korea Based on C and N Stable Isotope Ratios

1
Fisheries Resources Research Center, National Institute of Fisheries Science, Tongyeong 53064, Korea
2
Department of Marine Bioscience, Gangneung-Wonju National University, Gangneung 25457, Korea
3
Dokdo Fisheries Research Center, National Institute of Fisheries Science, Pohang 37709, Korea
4
Distant Water Fisheries Resources Division, National Institute of Fisheries Science, Busan 46083, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Anas Ghadouani
Water 2022, 14(1), 58; https://doi.org/10.3390/w14010058
Received: 18 November 2021 / Revised: 19 December 2021 / Accepted: 26 December 2021 / Published: 28 December 2021
(This article belongs to the Special Issue Application of Stable Isotopes in Marine Ecosystems)
The aim of this study was to assess seasonal variation in the food-web structure of fish assemblages in the East (two sites) and the South (one site) Seas of Korea, and to compare the isotopic niche areas between the regions. To do this, we analyzed the community structures and the δ13C and δ15N values for fish assemblages, and their potential food sources collected during May and October 2020. There were spatial differences in the diversity and dominant species of fish assemblages between the two seas. The fish assemblages in the South Sea had relatively wide ranges of δ13C and δ15N (−22.4‰ to −15.3‰ and 7.4‰ to 13.8‰, respectively) compared to those (−22.1‰ to −18.0‰ and 9.8‰ to 13.6‰, respectively) in the East Sea. The δ13C and δ15N values of suspended particulate organic matter, zooplankton, and fish assemblages differed significantly among sites and between seasons (PERMANOVA, p < 0.05, in all cases). Moreover, isotopic niche indices were relatively higher in the South Sea compared to those in the East Sea. Such differences in food-web characteristics among sites are likely due to the specific environmental effects (especially, major currents) on the differences in the species compositions and, therefore, their trophic relationships. Overall, these results allow for a deeper understanding of the changing trophic diversity and community structure of fish assemblages resulting from climate variability. View Full-Text
Keywords: fish community; trophic structure; stable isotopes; coastal water; isotopic niches; climate change fish community; trophic structure; stable isotopes; coastal water; isotopic niches; climate change
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MDPI and ACS Style

Shin, D.; Park, T.H.; Lee, C.-I.; Hwang, K.; Kim, D.N.; Lee, S.-J.; Kang, S.; Park, H.J. Characterization of Trophic Structure of Fish Assemblages in the East and South Seas of Korea Based on C and N Stable Isotope Ratios. Water 2022, 14, 58. https://doi.org/10.3390/w14010058

AMA Style

Shin D, Park TH, Lee C-I, Hwang K, Kim DN, Lee S-J, Kang S, Park HJ. Characterization of Trophic Structure of Fish Assemblages in the East and South Seas of Korea Based on C and N Stable Isotope Ratios. Water. 2022; 14(1):58. https://doi.org/10.3390/w14010058

Chicago/Turabian Style

Shin, Donghoon, Tae H. Park, Chung-Il Lee, Kangseok Hwang, Doo N. Kim, Seung-Jong Lee, Sukyung Kang, and Hyun J. Park. 2022. "Characterization of Trophic Structure of Fish Assemblages in the East and South Seas of Korea Based on C and N Stable Isotope Ratios" Water 14, no. 1: 58. https://doi.org/10.3390/w14010058

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