Reconstruction of the Eukaryotic Communities in Beppu Bay Over the Past 50 Years Based on Sedimentary DNA Barcoding

Yudai Segawa, Masanobu Yamamoto*, Michinobu Kuwae, Kazuyoshi Moriya, Hitoshi Suzuki, Koji Suzuki

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Comprehensive reconstruction of changes in eukaryotic communities in the recent past is useful for determining the response of the local ecosystems to global changes during the Anthropocene. We used DNA barcoding technology to reconstruct the marine eukaryotic communities of Beppu Bay, the Seto Inland Sea, Japan, over the past 50 years based on a short sediment core. Highly vulnerable DNA fragments were preserved in the sediments, possibly due to seasonally euxinic conditions. Analysis of the 18S rRNA V9 gene region indicated the temporal variability in eukaryotic communities, which consisted mainly of dinoflagellates and diatoms, in response to changes in the nutrient regime. The dominant species in the dinoflagellate genus Alexandrium changed as the water temperature increased. In addition, enhanced contributions by terrestrial plants and mosses were detected in flood sediments. Our results suggest that DNA fragments can be used as a proxy for the paleoenvironmental and paleoecological conditions in Beppu Bay.

本文言語English
論文番号e2022JG006825
ジャーナルJournal of Geophysical Research G: Biogeosciences
127
6
DOI
出版ステータスPublished - 2022 6月

ASJC Scopus subject areas

  • 林業
  • 水圏科学
  • 生態学
  • 水の科学と技術
  • 土壌科学
  • 大気科学
  • 古生物学

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