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Title: Environmental DNA preserved in marine sediment for detecting jellyfish blooms after a tsunami
Authors: Ogata, Mizuki
Masuda, Reiji
Harino, Hiroya
Sakata, Masayuki K.
Hatakeyama, Makoto
Yokoyama, Katsuhide
Yamashita, Yoh
Minamoto, Toshifumi
Author's alias: 尾形, 瑞紀
益田, 玲爾
張野, 宏也
坂田, 雅之
畠山, 信
横山, 勝英
山下, 洋
源, 利文
Keywords: Environmental monitoring
Marine biology
Molecular ecology
Issue Date: 2021
Publisher: Springer Nature
Journal title: Scientific Reports
Volume: 11
Thesis number: 16830
Abstract: Environmental DNA (eDNA) can be a powerful tool for detecting the distribution and abundance of target species. This study aimed to test the longevity of eDNA in marine sediment through a tank experiment and to use this information to reconstruct past faunal occurrence. In the tank experiment, juvenile jack mackerel (Trachurus japonicus) were kept in flow-through tanks with marine sediment for two weeks. Water and sediment samples from the tanks were collected after the removal of fish. In the field trial, sediment cores were collected in Moune Bay, northeast Japan, where unusual blooms of jellyfish (Aurelia sp.) occurred after a tsunami. The samples were analyzed by layers to detect the eDNA of jellyfish. The tank experiment revealed that after fish were removed, eDNA was not present in the water the next day, or subsequently, whereas eDNA was detectable in the sediment for 12 months. In the sediment core samples, jellyfish eDNA was detected at high concentrations above the layer with the highest content of polycyclic aromatic hydrocarbons, reflecting tsunami-induced oil spills. Thus, marine sediment eDNA preserves a record of target species for at least one year and can be used to reconstruct past faunal occurrence.
Description: 堆積物の環境DNAで探る過去の出来事 --津波直後のクラゲ大発生を検知--. 京都大学プレスリリース. 2021-08-23.
Rights: © The Author(s) 2021
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
DOI(Published Version): 10.1038/s41598-021-94286-2
PubMed ID: 34417484
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