新熱帯二次森林のバイオマスの回復力
Lourens Poorter1, Frans Bongers1, T Mitchell Aide2
1Forest Ecology and Forest Management Group, Wageningen University, PO Box 47, 6700 AA Wageningen, The Netherlands.
Nature
|February 4, 2016
まとめ
熱帯二次森林は地表のバイオマスを 早く取り戻し 古い森林よりも11倍早く 炭素を吸収します 再利用率は水資源の利用可能性に左右され,炭素循環のバランスを保つための保存戦略を策定します.
科学分野:
- エコロジー
- 気候科学
- 林業
背景:
- 熱帯地域での土地利用の変化は 炭素循環に大きく影響します
- 二次森林のバイオマスの回収率と影響要因については不確実性がある.
研究 の 目的:
- 新熱帯二次森林における地上のバイオマス回収を分析する.
- 気候,風景,土地利用が 回復率にどう影響するか 調べる
- ラテンアメリカ全土の 炭素貯蔵の可能性を地図化するためです
主な方法:
- ネオトロピカル環境のグラデーションにわたる45の森林サイトと約1,500の森林プロットを分析しました.
- 地上でのバイオマス回収の定量化
- 水資源と気候の関係で回収率の評価
主要な成果:
- 二次森林は高い生産性と回復力を示し,20年後に平均122Mg ha−1の地上のバイオマス回復率を示しています.
- 回復している森林の純炭素吸収量は3.05Mg C ha−1 yr−1で,古い森林の11倍です.
- バイオマスの回収量は 場所によって11.3倍に変化し 水の利用可能性によって増加しました
- 古い生殖生物量の90%を回復する平均時間は66年です.
結論:
- 熱帯の森林再生は 炭素を吸収する重要なプロセスです
- バイオマスの回収率の重要な要因は 水の利用可能性です
- 生物質回収マップは ラテンアメリカにおける 保存・回復政策の指針となるでしょう
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