乾地の生物圏における森林の面積
Jean-François Bastin1,2, Nora Berrahmouni3, Alan Grainger4
1Food and Agriculture Organization of the United Nations, Vialle delle Terme di Caracalla, 00153 Rome, Italy. bastin.jf@gmail.com rene.castro@fao.org.
まとめ
世界の乾燥地帯の森林面積は著しく過小評価されています. この研究は,これまでに報告されていない4億6700万ヘクタールの森林を明らかにし,世界の森林面積を9%増加させました.
科学分野:
- エコロジー
- 林業
- リモートセンシング
背景:
- 乾燥地帯のバイオムは,地球の陸地表面の大部分を占めています.
- 乾燥地内の森林の正確な評価は,地球規模の生態学的な理解に不可欠です.
- 乾燥地帯の森林面積に関する以前の推定は不完全であることが知られています.
研究 の 目的:
- 乾燥地帯の生物圏内の世界の森林面積を定量化する.
- 先進的な遠隔検知技術を用いて,乾燥地帯の森林面積をより正確に推定する.
- 干ばつ地帯の,これまで報告されていない森林地域を特定する.
主な方法:
- 21万以上のサンプルプロット (各0.5ヘクタール) の分析.
- 衛星画像データベースを利用した写真解釈アプローチ.
- グーグル・アース・プラットフォームの 空間と時間の高解像度画像を活用します
主要な成果:
- 2015年,乾燥地は1,3億2,700万ヘクタールで 樹木が10%以上あった.
- 推定10億7900万ヘクタールの 乾燥地帯の森林が確認された.
- この調査は,これまでに報告されていない4億6700万ヘクタールの乾燥地の森林を特定し,これは以前の推定より40~47%増加した.
結論:
- 地球上の乾燥地帯の森林面積は 予想よりかなり大きい.
- この研究により,世界の森林面積が少なくとも9%増加しました.
- この調査結果は,世界の森林面積と炭素貯蔵量の評価において,乾燥地の重要性を強調しています.
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