2023 Fiscal Year Final Research Report

A flora of aquatic macrophytes in Lake Shinji basin from the past to the present: a wide-area analysis using environmental DNA.

Research Project

PDF

Project/Area Number	21H02220
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 39060:Conservation of biological resources-related
Research Institution	Kanto Gakuin University (2023) National Institute of Maritime, Port and Aviation Technology (2021-2022)
Principal Investigator	Komuro Takashi 関東学院大学, 経済学部, 講師 (40782561)
Co-Investigator(Kenkyū-buntansha)	高原輝彦島根大学, 学術研究院農生命科学系, 准教授 (10536048) 藤井伸二人間環境大学, 人間環境学部, 准教授 (40228945) 牧雅之東北大学, 学術資源研究公開センター, 教授 (60263985)
Project Period (FY)	2021-04-01 – 2024-03-31
Keywords	宍道湖 / 水草 / eDNA / ツツイトモ sp.
Outline of Final Research Achievements	This study was conducted to compile a species list of existing aquatic macrophytes in reservoirs and Lake Shinji within the Lake Shinji watershed. A comprehensive survey of the reservoirs in the Lake Shinji watershed allowed us to determine the waterweed fauna in the watershed. It is unlikely that the species of Potamogeton sp. present in Lake Shinji are of hybrid origin with Potamogeton sp. as a single parent or unknown species, as we had initially assumed. The environmental DNA survey of the sediments revealed that the past fish fauna can be reconstructed from the sediments as well.
Free Research Field	自然地理学，陸水学
Academic Significance and Societal Importance of the Research Achievements	本研究で明らかとなった結果は，宍道湖に今後侵入してくる可能性のある水草についての予測をたてる上で重要な結果となった。また，これまでは宍道湖流域内の水草の分布に関する情報は極めて少なかったことから今後の流域管理という点からも重要な結果を得ることができた。そのため，今後は得られた分布情報をもとに，宍道湖に流入してくる可能性の有無について，検証を進めていく必要があると考えられる。