"Cの予期せぬ逆転"に関するコメントへの返信
Peter B Reich1,2, Sarah E Hobbie3, Tali D Lee4
1Department of Forest Resources, University of Minnesota, St. Paul, MN 55108, USA. preich@umn.edu.
Science (New York, N.Y.)
|September 15, 2018
まとめ
年間間の気候の変化は,高濃度のCO2 (eCO2) の下でC3-C4草のバイオマス変化を完全に説明することはできません. 私たちの発見は 変化する大気条件に対する 植物の反応の複雑さを強調しています
科学分野:
- 植物生理学
- 気候変動の生物学
- エコロジー
背景:
- CO2 (eCO2) の上昇に対する植物の反応は,時間とともに大きく変化します.
- 過去の研究では 気候がこれらの反応に及ぼす影響を調べました
- eCO2に対するC3-C4草のバイオマス反応の予想外の20年逆転が観察されました.
研究 の 目的:
- eCO2に対するC3-C4草のバイオマス反応の時間的動態を説明する際の,年間の気候変動の役割を調査する.
- 観測された時間的動態を完全に反映しているかどうかを判断する.
主な方法:
- C3とC4の草のバイオマスの長期実験データ分析
- 気候変数とバイオマス反応の関係を評価するための統計モデリング
- 観測された時間動態とモデル予測の比較.
主要な成果:
- 年間間の気候変動は,バイオマス反応の20年間の逆転を完全に説明するのに不十分であることが判明しました.
- eCO2に対するC3とC4の反応における気候に依存する差異は特定されたが,完全な説明は与えられなかった.
- バイオマス反応の時間的動態は 気候要因だけで部分的に説明できないままです
結論:
- C3-C4草のバイオマスによるeCO2への反応の長期的反転の主要な要因は,年間間の気候変動だけではない.
- CO2の増加に対する植物反応の複雑な時間的動態に寄与する他の要因を特定するには,さらなる研究が必要である.
- これらの動態を理解することは 将来の気候シナリオの下で 生態系の変化を予測するのに不可欠です
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