グローバルな森林破壊のホットスポットにおける農業主導の限界効果の空間的足跡を定量化する
Sebastián Torrella1,2, Matthias Baumann1, Marie Pratzer1,3
1Geography Department, Humboldt-Universität Zu Berlin, Berlin, Germany.
Global change biology
|February 11, 2026
まとめ
農業の拡大は,熱帯雨林の干ばつに重大な縁の影響を及ぼし,森林破壊の足跡を超えた広大な面積を劣化させます. これらの影響,特に作物による影響は,何十年にもわたって持続し,大面積の健全な森林を優先する保全計画の必要性を強調しています.
科学分野:
- エコロジー エコロジー エコロジー
- 環境科学 環境科学
- リモートセンシング (リモートセンサー)
背景:
- 熱帯乾燥林は,農業の拡大による激しい圧力に直面しており,分散と農業主導の辺縁効果の理解が不十分である.
- アルゼンチンのドライチャコは,森林破壊の重要なホットスポットであり,これらの影響について緊急に調査する必要があります.
研究 の 目的:
- アルゼンチンのドライチャコの森林構造とバイオマスに対する農業の限界影響を定量化し,マッピングする.
- 土地利用 (作物 vs 牧場) と森林伐採以来の時間に基づいて,辺縁効果の範囲と強度を評価する.
主な方法:
- 衛星ベースの森林構造指標を利用した.
- ベイジアン階層モデリングのフレームワークを使用しました.
- 分析された部分的な樹木/灌木覆面と地上のバイオマス.
主要な成果:
- 縁の効果は,森林に700m以上浸透し,構造パラメータを最大41%減少させます.
- 耕作は牧草よりも強い縁の効果を示したが,シルボ牧草は最小限の効果を示した.
- 森林の18%が劣化しており,生物質の損失は923万トンで,その影響は30年以上続く.
結論:
- 農業に起因する辺縁効果は,直接の森林伐採をはるかに超えて,森林の退廃の著しく過小評価された要因である.
- これらの影響は,長期的な劣化負債を生み出し,炭素会計のような持続可能性分析に影響を与えます.
- 保護戦略は,これらの浸透的な影響を軽減し,生態学的機能を維持するために,大きな,隣接する森林を優先する必要があります.
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