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<p>Intertidal flats are vital coastal ecosystems supporting high biodiversity. This study evaluates within-site temporal trajectories of macrobenthic communities following two restoration interventions applied at non-equivalent sites: seawater circulation improvement (SCI) and de-reclamation (DR). We monitored 18 time points (2020–2025) and summarized changes across three phases relative to restoration: Before, Early-After, and Late-After. At the SCI type, sediment coarsening, reduced organic content, and gradual increases in species richness and diversity were observed, together with a stabilization of community structure and temporal shifts in dominant taxa. At the DR type, biological and sedimentary responses were weaker and more variable, with no statistically significant trends detected during the monitoring period. Even so, early macrobenthic colonization in the re-established tidal flat suggests ongoing recovery potential, with pioneer species such as <i>Perinereis linea</i> appearing within months. Overall, the trajectories documented here are site-specific and shaped by the post-restoration environmental context. Although interpretations are limited by the absence of formal control sites, this study provides valuable long-term baseline information on sedimentary and biological responses to tidal-flat restoration and underscores the importance of phase-based monitoring and long-term observations for evaluating restoration outcomes.</p>

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Effects of Two Restoration Approaches on Temporal Dynamics of Macrobenthic Communities in Intertidal Flats

  • 期刊论文

  • 发表日期：

    2025年10月31日

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  • So Yun Jang,
  • Sang Ock Ryu,
  • Hyun Chool Shin,
  • Chang Gun Lee,
  • Ha Neul Oh,
  • Sun Kwan Oh,
  • Jeong Rok Lee,
  • Young Sook Baek

摘要

Intertidal flats are vital coastal ecosystems supporting high biodiversity. This study evaluates within-site temporal trajectories of macrobenthic communities following two restoration interventions applied at non-equivalent sites: seawater circulation improvement (SCI) and de-reclamation (DR). We monitored 18 time points (2020–2025) and summarized changes across three phases relative to restoration: Before, Early-After, and Late-After. At the SCI type, sediment coarsening, reduced organic content, and gradual increases in species richness and diversity were observed, together with a stabilization of community structure and temporal shifts in dominant taxa. At the DR type, biological and sedimentary responses were weaker and more variable, with no statistically significant trends detected during the monitoring period. Even so, early macrobenthic colonization in the re-established tidal flat suggests ongoing recovery potential, with pioneer species such as Perinereis linea appearing within months. Overall, the trajectories documented here are site-specific and shaped by the post-restoration environmental context. Although interpretations are limited by the absence of formal control sites, this study provides valuable long-term baseline information on sedimentary and biological responses to tidal-flat restoration and underscores the importance of phase-based monitoring and long-term observations for evaluating restoration outcomes.