岩底に貯蔵された水を広く利用する木質植物
Erica L McCormick1, David N Dralle2, W Jesse Hahm3
1Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA. erica.mccormick@utexas.edu.
Nature
|September 9, 2021
まとめ
干ばつの間だけでなく 岩底の水を大量に利用しています この岩の水分は 水と炭素の循環に不可欠で 生態系に大きな影響を及ぼします
科学分野:
- 地球科学
- エコロジー
- 水学
背景:
- 現地調査によると 木性植物には 岩床の毛穴や裂け目から 十分な水分が流れています
- ベッドロック水貯蔵は,水と炭素循環モデルの見直しを必要とする,植物に利用可能な重要な水源である可能性があります.
- 地上水文学の包括的な理解のために,岩床の性質を組み込むことは不可欠です.
研究 の 目的:
- アメリカ本土の植物の発汗に 岩底の水貯蔵が与える影響を推定する.
- 木造植物による岩底の水使用の時間的・空間的パターンを分析する.
- 地上の水と炭素循環における岩の水分の重要性を評価する.
主な方法:
- アメリカ本土の分析のために公開されたデータセットを使用した.
- 岩盤からの水吸収の時間的・空間的パターンを調べた.
- 岩底の水の汗流への貢献を定量化した.
主要な成果:
- 植物は様々な気候やバイオームに 浸透するために岩底の水に広くアクセスします
- 極度の干ばつ時だけでなく 普段から水を得ています
- カリフォルニアでは,年間岩底の水分流出量は貯水池の貯蔵量を超え,関連する植物は,地上炭素の50%以上を保持しています.
結論:
- 地下水とは異なり 植物は岩床から 岩の水分にアクセスします
- 岩の水分は陸上の水と炭素循環の重要な要素であり,土壌の水分と比べることができます.
- 水質学と生態学の概念的なパラダイムを見直すには,岩床の水分吸収を理解することが不可欠です.
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