二次および劣化した熱帯雨林の炭素吸収場
Viola H A Heinrich1,2, Christelle Vancutsem3,4, Ricardo Dalagnol5,6,7
1School of Geographical Sciences, University of Bristol, Bristol, UK. viola.heinrich@bristol.ac.uk.
Nature
|March 16, 2023
まとめ
熱帯雨林の回復は 重要な炭素吸収源であり 森林の喪失による 炭素を蓄積し 排出を相殺します 森林の再生は 炭素を蓄積する大きな可能性を秘めています
科学分野:
- エコロジー
- 気候科学
- 林業
背景:
- 気候変化,森林破壊,火災,伐採によって 生命に不可欠な炭素吸収源である 古い熱帯森林が 減少しています
- 熱帯二次および劣化した森林の回復は,重要な土地の覆い (約2万平方メートル) を占めています. しかし,炭素蓄積能力は不明である.
研究 の 目的:
- アマゾン,ボルネオ,中央アフリカで回復している熱帯雨林の地上の炭素 (AGC) を定量化するために.
- 劣化した森林と二次森林における炭素蓄積の空間的および時間的なパターンを分析する.
- 森林の再生と炭素吸収に影響を与える環境と人為的な要因を特定する.
主な方法:
- 森林成長の異質なパターンを分析するために衛星データ製品を使用した.
- 森林の回復過程における地上での量化炭素 (AGC) の蓄積
- 環境要因 (気温,水不足) と再生率に対する干渉体制の影響を評価した.
主要な成果:
- 再生森林は1984年から2018年の間に平均107TgC年−1 (90-130TgC年−1) を蓄積した.
- この蓄積は,同じ期間の熱帯雨林の減少による炭素排出量の約26% (21-34%) を相殺した.
- ボルネオの再生率は,回復の最初の20年間の中央アフリカとアマゾンよりも著しく高かった (45~58%),これは地元の環境変数に影響を受けた.
結論:
- 熱帯雨林の回復は 重要な炭素吸収源であり 気候変動の緩和に 重要な役割を果たしています
- 古い森林の保全は優先事項ですが,劣化した森林の保全と回復も不可欠です.
- 劣化した二次森林の回復は,研究された熱帯地域全体で53 Tg C year−1 (44-62 Tg C year−1) の将来的な炭素吸収の可能性を保持しています.
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