セルラーゼは土壌の有機炭素動態を支配する 森林の生態系に植物の廃棄物の投入の下での有機炭素動態
Xiuxian Men1, Deping Zhai1,2, Baoshan Huang1,3
1State Key Laboratory of Vegetation Structure, Function and Construction (VegLab) and Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China and Key Laboratory of Soil Ecology and Health in Universities of Yunnan Province, School of Ecology and Environmental Sciences, Yunnan University, Kunming, People's Republic of China.
Ecology letters
|February 19, 2026
まとめ
森林廃棄物の投入を変化させることは,土壌の炭素を分解する酵素に大きく影響し,セルラーゼ活動は土壌の有機炭素 (SOC) 動態の主要な原動力である. 森林管理は,炭素の吸収を高めることができます.
科学分野:
- エコロジー エコロジー エコロジー
- バイオジオケミストリー バイオジオケミストリー
- 土壌科学 土壌科学
背景:
- 土壌の炭素分解酵素は,地球上の炭素循環に不可欠です.
- 変化したデトリチュスの入力下での酵素の役割の全般的な定量化は欠けている.
- これらの動態を理解することは,土壌有機炭素 (SOC) の運命を予測するために不可欠です.
研究 の 目的:
- 世界の森林における炭素を分解する酵素とSOCダイナミクスに対するデトリチュス入力レジムの影響を評価する.
- 酵素活動とSOC反応の関連性を特定する.
- 変化する環境条件下で土壌の炭素動態の予測を改善する.
主な方法:
- 世界森林バイオームからの564件の観測を体系的に評価したものです.
- ダブルリターおよびデトリタル除去処理の下での酵素活性 (セルラーゼ,リグニナーゼ) の分析.
- SOCの含有量と酵素活動,森林の種類,実験期間との関連を評価する.
主要な成果:
- litter の入力を2倍にすると,セルラーゼの活性が増加したが,SOCやリグニナーゼは変化しなかった.
- デトリタルの除去,特に根の除去は,セルラーゼの活動を抑制し,SOCのプールを減少させます.
- セルラーゼの活動は,森林の種類と時間によって影響を受け,SOC反応の主な原動力として浮上しました.
結論:
- 土壌の炭素分解酵素活動,特にセルラーゼは,変化したデトリチュスの入力下でのSOCダイナミクスの重要な仲介者です.
- 森林の種類と持続期間は,SOCの規制に影響します.
- この発見は,炭素の吸収を強化するための森林管理戦略を支えるものである.
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