Scholarlink

Purpose <p>The diversity of eukaryote communities formed in brackish waters along the southern coast of the Korean Peninsula was analyzed. Physico-chemical factors (temperature, pH, electrical conductivity, salinity, dissolved oxygen, and turbidity) were measured in the field.</p> Methods <p>eDNA metabarcoding was performed targeting the V4 region of 18&#xa0;S rRNA using the Illumina MiSeq sequencing platform. The revealed eukaryotic communities abundantly included Arthropoda, Bacillariophyta, Basidiomycota, Ciliophora, Mollusca, and Nematoda at the phylum level. At the species level, <i>Halicyclops</i> sp., <i>Leptocaris brevicornis</i>, <i>Spinileberis quadriaculeata</i>,<i> Melosira</i> sp., <i>Lentinula edodes</i>, and <i>Strombidinopsis</i> sp. were included as dominant species with a relative abundance of &gt; 10%.</p> Results <p>Depending on the dominance of eukaryote communities, the species composition and dominance of each species varied; this tendency could suggest a potential predation influence. Phytoplankton was dominant in the community with weak potential trophic influence, whereas <i>Navicula</i> was the dominant taxa with strong potential trophic influence. Furthermore, the community species diversity increased as the zooplankton species, which was responsible for the potential trophic influence. The plankton community is expected to be affected by environmental factors and the potential trophic influence of eukaryotes on each species. Particularly, salinity is a highly variable factor in estuaries. The abundance of Bacillariophyta increased under high salinity, whereas the abundance of Ciliophora and Nematoda increased under low salinity. Furthermore, the only terrestrially derived fungal plankton was detected in Songpo, which was expected to have lower salinity due to the strong influence of freshwater. These results suggest that despite the plankton communities forming at the estuaries sharing the same shore region, they can have different characteristics and a consistent tendency to be affected by biological and environmental factors.</p> Conclusions <p>Research raises the importance of information on biological and environmental factors for understanding eukaryote communities. Furthermore, it provides insight into the differences that exist between eukaryote communities in closely related environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

eDNA-based assessment of eukaryote diversity in brackish waters along Korea’s southern coast

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月1日

查看全文
  • Young-Saeng Kim,
  • Hyun-Sik Yun,
  • Jae-Hak Lee,
  • Jae-Sin Choi,
  • Doo Hee Won,
  • Yong Jae Kim,
  • Soon-Jin Hwang,
  • Kyung-Lak Lee,
  • Han-Soon Kim

摘要

Purpose

The diversity of eukaryote communities formed in brackish waters along the southern coast of the Korean Peninsula was analyzed. Physico-chemical factors (temperature, pH, electrical conductivity, salinity, dissolved oxygen, and turbidity) were measured in the field.

Methods

eDNA metabarcoding was performed targeting the V4 region of 18 S rRNA using the Illumina MiSeq sequencing platform. The revealed eukaryotic communities abundantly included Arthropoda, Bacillariophyta, Basidiomycota, Ciliophora, Mollusca, and Nematoda at the phylum level. At the species level, Halicyclops sp., Leptocaris brevicornis, Spinileberis quadriaculeata, Melosira sp., Lentinula edodes, and Strombidinopsis sp. were included as dominant species with a relative abundance of > 10%.

Results

Depending on the dominance of eukaryote communities, the species composition and dominance of each species varied; this tendency could suggest a potential predation influence. Phytoplankton was dominant in the community with weak potential trophic influence, whereas Navicula was the dominant taxa with strong potential trophic influence. Furthermore, the community species diversity increased as the zooplankton species, which was responsible for the potential trophic influence. The plankton community is expected to be affected by environmental factors and the potential trophic influence of eukaryotes on each species. Particularly, salinity is a highly variable factor in estuaries. The abundance of Bacillariophyta increased under high salinity, whereas the abundance of Ciliophora and Nematoda increased under low salinity. Furthermore, the only terrestrially derived fungal plankton was detected in Songpo, which was expected to have lower salinity due to the strong influence of freshwater. These results suggest that despite the plankton communities forming at the estuaries sharing the same shore region, they can have different characteristics and a consistent tendency to be affected by biological and environmental factors.

Conclusions

Research raises the importance of information on biological and environmental factors for understanding eukaryote communities. Furthermore, it provides insight into the differences that exist between eukaryote communities in closely related environments.