アフリカの熱帯雨林の構成と地球規模の変化に対する脆弱性

Maxime Réjou-Méchain¹, Frédéric Mortier^2,3, Jean-François Bastin^4,2,3,5

¹AMAP, Univ. Montpellier, IRD, CNRS, CIRAD, INRAE, Montpellier, France. maxime.rejou@ird.fr.

Nature

|April 22, 2021

まとめ

中央アフリカの森林は気候変動や人口増加によって脅かされています樹木の組成をマッピングすることで脆弱性が明らかになり重要な生態系の保全戦略を導き出します

科学分野:

エコロジー
森林科学
保護生物学

背景:

アフリカの熱帯雨林は予測される気候変動と人口増加によって大きな脅威に直面しています
森林の構成と環境要因を理解することは効果的な保全と持続可能な管理に不可欠です

研究の目的:

大規模なデータセットを使用して,中央アフリカにおける支配的な木種の分布をモデル化.
森林の構造と機能の連続した地図を作成する.
これらの森林が将来気候変動や人為的な変化に脆弱であるかを評価する.

主な方法:

18万以上の畑で 600万本の木のデータセットを活用しました
共同で支配的な木種の分布と繁殖をモデル化した.
森林の構成に関する連続した空間地図を作成した.

主要な成果:

コミュニティレベルでの不確実性の平均を明らかにした.
環境のグラデーション (気候,土壌,人間による影響) に関して,対照的な植物と機能的組成を特定した.
植物学的に異なった森林で機能的収束を観察した.

結論:

中央アフリカの森林は,特に周辺地域やコンゴ民主共和国では,2085年に予測される気候や人為的な変化に非常に脆弱です.
この調査結果は,国境を越えた保全と管理戦略を策定するための重要な定量基準となる.
森林の持続可能な管理には気候変動と人間による脅威の両方に対処し森林の未来を確保する必要があります

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