恒久性のない川や小川の世界的流行

Mathis Loïc Messager^1,2, Bernhard Lehner³, Charlotte Cockburn^4,5

¹Department of Geography, McGill University, Montreal, Quebec, Canada. mathis.messager@mail.mcgill.ca.

Nature

|June 17, 2021

まとめ

永続的な河川よりも頻繁に流れを止めている非永続的な河川は,全世界の河川の51%から60%を占めています. この発見は断続的な流れを河川の管理と保全の取り組みに含める必要性を強調しています

科学分野:

淡水科学
水学
エコロジー
環境科学

背景:

流れる水は生物多様性や生物地球化学の循環や人間社会にとって不可欠です
永続的な川はよく研究されているが,非永続的な川 (定期的に流れが止まる川) はしばしば見過ごされている.
この監視は,何百万もの人々にとって重要な水資源の劣化につながる可能性があります.

研究の目的:

恒久性のない河川の世界的流行を予測する.
流れの断続性の重要性を強調することで既存の河川の概念に挑戦する
世界的な淡水資源のより良い管理のための基盤を提供すること.

主な方法:

川の水質学,気候,地質学,地表に関するグローバルデータを活用した.
川の流れの断続性を推定する予測モデルを開発した.
恒久性のない川や小川の分布を地図化しました.

主要な成果:

世界の川の51%から60%は年間少なくとも"日間流れが止まります
すべての気候,バイオーム,大陸にわたって存在することを実証しました.
断続的な河川は例外ではなく常態であることを示しました

結論:

流動の断続性を川の概念に組み込むために,淡水科学ではパラダイムシフトが必要である.
永続性のない河川の理解と管理は地球の生物多様性と人間の福祉にとって極めて重要です
断続的な河川のマッピングは淡水科学の課題に取り組むための重要なステップです

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