Population structure and secondary production of Hediste diadroma (Nereididae, Polychaeta) in the Bongam tidal flat, Masan Bay, Korea SCIE SCOPUS

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Title
Population structure and secondary production of Hediste diadroma (Nereididae, Polychaeta) in the Bongam tidal flat, Masan Bay, Korea
Author(s)
Kim, Jeonghyeon; Ryu, Jongseong; Shin, Hyun Chool; Jo, Chun-Ok; Choi, Jin-Woo; Seo, Jin Young
KIOST Author(s)
Seo, Jin Young(서진영)
Alternative Author(s)
서진영
Publication Year
2024-09
Abstract
This study aims to understand population dynamics and secondary production of a nereid polychaete Hediste diadroma in the Bongam tidal flat. Samples were collected on a monthly basis over two distinct periods: from May 2015 to April 2016 and from March 2018 to February 2019. The annual mean values for temperature, sand content, and total organic carbon in surface sediments were 18.1±9.6 ℃, 79.8±12.4% and 0.53±0.36%, respectively. Relationships between parameters such as body length (BL) versus the width of the third setiger (WS3), and dry weight (DW) versus WS3 were analyzed using a sample group of 56 intact individuals. The resulting equations were determined as BL=(28.575×WS3)-7.6462 with an R2 value of 0.93, and DW=1.3435×WS33.252 with an R2 value of 0.83. There was a notable decrease in annual mean density observed in 2018 (1096±901 ind. m−2) compared to 2015 (1938±1724 ind. m−2), which could be attributed to higher temperatures and interspecies competition in 2018. Recruitment events were singular within each year, occurring in June 2015 and July 2018. The estimated secondary production (P) was 8.40 g DW m−2 yr−1 with a mean biomass (B̅) of 5.18 g DW m−2 (P/B̅= 1.6) from May 2015 to April 2016, and P= 3.38 g DW m−2 yr−1 with B̅= 1.97 g DW m−2 (P/B̅= 1.7) from March 2018 to February 2019. Based on these findings, it is suggested that the contribution of H. diadroma to energy flows in the benthic ecosystem of the study area accounts for approximately 3% (1.7 g C m−2 yr−1) of the total energy flows (54.5 g C m−2 yr−1).
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/45542
DOI
10.1016/j.rsma.2024.103506
Bibliographic Citation
Regional Studies in Marine Science, v.74, 2024
Publisher
Elsevier BV
Keywords
Hediste diadroma; Macrobenthos; Population dynamics; Secondary production; Tidal flat
Type
Article
Language
English
Document Type
Article
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