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<p>Understanding the genetic diversity and population connectivity of <i>Ecklonia cava</i> and <i>Eisenia bicyclis</i> is essential for their conservation and sustainable management. In this study, we examined the phylogenetic relationships and haplotype distribution of these species along the Korean coast, emphasizing their role as resources of blue carbon. Mitochondrial DNA markers (<i>cox1</i> and <i>cox3</i>) were analyzed to assess genetic variation and phylogeographic patterns among Korean and Japanese populations. Maximum likelihood analyses based on concatenated and gene-specific datasets revealed overall congruent patterns, although minor differences in tree topology were observed. A total of eight haplotypes were identified in <i>Ec. cava</i>, with Hap_1 as the central haplotype shared across multiple Korean populations. In contrast, <i>E. bicyclis</i> exhibited relatively low diversity of haplotypes and weak regional genetic structuring. The neighbor-net network supported a tree-like genetic structure and indicated genetic differentiation between regional groups of <i>Ec. cava</i>, although this observation should be interpreted with caution due to limited dataset of Japanese populations. These findings suggest that regional oceanographic conditions and species-specific ecological distributions may contribute to shaping genetic structure in kelp species. This study provides baseline data for conservation strategies and reinforces the importance of preserving <i>Ecklonia</i> and <i>Eisenia</i> populations as vital resources of blue carbon.</p>

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Phylogeographic Structure and Haplotype Diversity of Seaweeds Ecklonia cava and Eisenia bicyclis Along the Korean Coast Using Mitochondrial DNA Markers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月29日

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  • Jin-Won Lee,
  • Jeong-Mi Do,
  • Boseong Kim,
  • Yu-Hee Seo,
  • Myeong-Jun Gwon,
  • KyoungSu Choi,
  • Ho-Sung Yoon

摘要

Understanding the genetic diversity and population connectivity of Ecklonia cava and Eisenia bicyclis is essential for their conservation and sustainable management. In this study, we examined the phylogenetic relationships and haplotype distribution of these species along the Korean coast, emphasizing their role as resources of blue carbon. Mitochondrial DNA markers (cox1 and cox3) were analyzed to assess genetic variation and phylogeographic patterns among Korean and Japanese populations. Maximum likelihood analyses based on concatenated and gene-specific datasets revealed overall congruent patterns, although minor differences in tree topology were observed. A total of eight haplotypes were identified in Ec. cava, with Hap_1 as the central haplotype shared across multiple Korean populations. In contrast, E. bicyclis exhibited relatively low diversity of haplotypes and weak regional genetic structuring. The neighbor-net network supported a tree-like genetic structure and indicated genetic differentiation between regional groups of Ec. cava, although this observation should be interpreted with caution due to limited dataset of Japanese populations. These findings suggest that regional oceanographic conditions and species-specific ecological distributions may contribute to shaping genetic structure in kelp species. This study provides baseline data for conservation strategies and reinforces the importance of preserving Ecklonia and Eisenia populations as vital resources of blue carbon.