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<p>This research kept track of meiofauna over a long period, from 2006 to 2022, in the Ulleung Basin and the coastal waters around Dokdo in the East Sea. We collected meiofauna samples from six different sites at water depths ranging from 173 to 2,344&#xa0;m with various types of sediment. Alongside this, we measured environmental factors like sediment grain size, total organic carbon (TOC), salinity, bottom water temperature, and dissolved oxygen levels. Results showed significant spatial and temporal variability in meiofaunal density and diversity governed primarily by sediment characteristics and water depth. Shallow stations with sandy, coarse sediments and higher oxygen levels supported greater meiofaunal diversity and balanced community structures. In contrast, deeper stations with fine, organically enriched sediments exhibited lower diversity, dominated by tolerant taxa such as nematodes. Statistical analyses confirmed clear community partitioning between shallow and deep zones and strong correlations of meiofaunal abundance with total organic carbon and depth. These findings emphasize the critical role of sediment texture and organic matter in shaping meiofaunal assemblages and highlight their utility as sensitive indicators of benthic ecosystem health. The temporal stability observed in deep-sea assemblages contrasts with the greater variability of shallower communities influenced by seasonal and hydrodynamic factors. Incorporating meiofaunal data into long-term ecological monitoring may contribute to the early detection of environmental change and support management of this ecologically important marine region. This study contributes to understanding benthic biodiversity patterns in a unique marginal sea and provides insights into the potential ecological roles of meiofauna under changing environmental conditions.</p>

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Long-term Monitoring of Meiofaunal Density and Community Composition on the Coast of Dokdo, East Sea, Korea

  • 期刊论文

  • 发表日期：

    2026年5月18日

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  • Teawook Kang,
  • Dongsung Kim,
  • Je-Hyeok Oh,
  • A-Young Shin,
  • Mu Gyeom Jeon,
  • Won Gi Min

摘要

This research kept track of meiofauna over a long period, from 2006 to 2022, in the Ulleung Basin and the coastal waters around Dokdo in the East Sea. We collected meiofauna samples from six different sites at water depths ranging from 173 to 2,344 m with various types of sediment. Alongside this, we measured environmental factors like sediment grain size, total organic carbon (TOC), salinity, bottom water temperature, and dissolved oxygen levels. Results showed significant spatial and temporal variability in meiofaunal density and diversity governed primarily by sediment characteristics and water depth. Shallow stations with sandy, coarse sediments and higher oxygen levels supported greater meiofaunal diversity and balanced community structures. In contrast, deeper stations with fine, organically enriched sediments exhibited lower diversity, dominated by tolerant taxa such as nematodes. Statistical analyses confirmed clear community partitioning between shallow and deep zones and strong correlations of meiofaunal abundance with total organic carbon and depth. These findings emphasize the critical role of sediment texture and organic matter in shaping meiofaunal assemblages and highlight their utility as sensitive indicators of benthic ecosystem health. The temporal stability observed in deep-sea assemblages contrasts with the greater variability of shallower communities influenced by seasonal and hydrodynamic factors. Incorporating meiofaunal data into long-term ecological monitoring may contribute to the early detection of environmental change and support management of this ecologically important marine region. This study contributes to understanding benthic biodiversity patterns in a unique marginal sea and provides insights into the potential ecological roles of meiofauna under changing environmental conditions.