植物は,生態系が後退する過程で,地上のシリコンサイクルを維持する
F de Tombeur1, B L Turner2, E Laliberté3,4
1TERRA Teaching and Research Centre, Gembloux Agro-Bio Tech, University of Liege, 5030 Gembloux, Belgium. felix.detombeur@uliege.be.
Science (New York, N.Y.)
|September 5, 2020
まとめ
地球上のシリコンの循環は 200万年以上に渡って 土壌から植物によるプロセスへと変化します 栄養素に乏しい生態系にとって,植物によるシリコン保持は極めて重要です.
科学分野:
- 生地化学のサイクル
- 陸上の生態系開発
- 土壌科学
背景:
- グローバル・シリコン・サイクルは プライマリ・プロダクティビティと カーボン・サイクルのために不可欠です
- 陸上のシリコン源とサイクルの長期的な変化はよく理解されていません.
- シリコンの利用可能性は,土壌の気象化と生物学的プロセスに影響されます.
研究 の 目的:
- 長期の生態系開発における地上のシリコンサイクルの変化を調査する.
- 耐久性のある土壌におけるシリコンの利用可能性に関する制御を理解する.
- 栄養不足の環境でシリコンの循環を維持する 植物の役割を調査する.
主な方法:
- 西オーストラリアの200万年前の土壌年代分析
- 土壌年齢におけるシリコン源 (地質と生物学的) の比較
- 葉のシリコン濃度の測定は,土壌の年齢と気象に関連しています.
主要な成果:
- 地球上のシリコンサイクルが 2百万年以上に渡って 地質学的制御から生物学的制御へと移行した.
- シリコンの利用可能性は,若い土壌のペドジェニック源から,古い土壌の植物リサイクルに変化します.
- 葉のシリコン濃度は土壌の年齢とともに増加し,主要な栄養素の減少と対照的です.
結論:
- シリコンの植物の保持は,特に栄養素が乏しく,気候が悪かった土壌で,陸上の循環を維持します.
- 生態系の発展は,シリコンサイクルの生物学的優位性につながる.
- シリコンは栄養が限られた環境で 植物の適応と生存に 重要な役割を果たします
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