カノピーの干渉の狭い値が,熱帯雨林の微気候バッファリング能力を決定する
Michael J W Boyle1,2,3, Joseph Williamson4,5, Stephen J Rossiter5
1School of Biological Sciences, University of Hong Kong, Hong Kong SAR, China.
iScience
|February 20, 2026
まとめ
熱帯雨林の保護は不可欠です. 高い天蓋は,極端な暑さから無脊椎動物をバッファリングしますが,天蓋の76%以上の損失以上の干渉は,この保護を減少させ,生物多様性を脅かします.
科学分野:
- エコロジー エコロジー エコロジー
- 気候変動 生物学
- 保護科学 保護科学 保護科学
背景:
- 熱帯林は,伐採と劣化による脅威に直面している重要な生態系です.
- 干渉された森林の微気候は,より暑くなり,気候変動の影響を強める可能性があります.
- 無脊椎動物の生存は,微気候の安定性,特にそれらの上限熱量 (CTmax) と関連しています.
研究 の 目的:
- 熱帯雨林の破壊と地下微気候の温度との関係を評価する.
- 森林の表面温度と無脊椎動物の耐熱性を比較する.
- マイクロ気候のバッファリングを維持するために重要なキャノピーカバーの値を特定する.
主な方法:
- 熱画像を用いて,森の下部の地表温度を,森林の干渉グラデーションで捉えました.
- さまざまな無脊椎動物群の熱上限 (CTmax) を決定した.
- マイクロ気候の回復力を評価するために,将来の温暖化シナリオ (+3°C) をシミュレートします.
主要な成果:
- 表面温度は,カノピーの覆面が76%を下回ったときに無脊椎動物の熱限界を超えました.
- 高度に劣化した森林では,敏感な無脊椎動物にとって適した熱ニッチスペースが22%減少し, +3°Cの温暖化で倍増しました.
- 屋根の覆面が80%以上であった場所では,シミュレートされた温暖化でも,すべての無脊椎動物群の熱バッファリングが維持されました.
結論:
- カノピーの干渉の狭い値は,マイクロ気候のバッファリング能力を大幅に減少させます.
- 熱帯の生物多様性を将来の気候変動から守るために,高層の樹冠の保護は不可欠です.
- 森林の整合性を維持することは,温暖化が進む熱帯環境で無脊椎動物の生存に不可欠です.
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