アフリカの熱帯山林の高い地上の炭素貯蔵量
Aida Cuni-Sanchez1,2, Martin J P Sullivan3,4, Philip J Platts5,6,7
1Department of Environment and Geography, University of York, York, UK. a.cuni-sanchez@york.ac.uk.
Nature
|August 26, 2021
まとめ
アフリカの熱帯山林は,地上にある木の生生体質炭素 (AGC) を大量に貯蔵しています. 絶滅の危機に瀕しているにもかかわらず,これらの森林は以前に推定されたよりも多くの炭素を貯蔵しており,緊急の保全活動が必要である.
科学分野:
- エコロジー
- 林業
- 気候変動科学
背景:
- 熱帯雨林は 重要な炭素吸収場であり 陸上の植物の40%から50%を貯蔵しています
- 熱帯山林における地上の生木バイオマス炭素 (AGC) の貯蔵は十分に理解されていません.
- 山岳林は一般的に高さに関係する環境の変化により,低地林よりも低いAGCの貯蔵量を持っています.
研究 の 目的:
- アフリカの熱帯山林の AGC 株を分析する.
- 熱帯雨林の生態系と比較する
- 森林保全と再造林戦略のためのデータを提供すること.
主な方法:
- アフリカ12カ国の44の古い森林のデータセットからデータを集め,分析した.
- 測定した場所のAGCの平均値と信頼区間を計算した.
- モデル化された国別 AGC ストック評価
主要な成果:
- AfriMontネットワークのアフリカの山林は,平均149.4メガグラムの炭素を1ヘクタールに蓄積しています.
- アフリカの低地森林に匹敵し,ネオトロピカル山地および低地森林に比べてかなり高い.
- アフリカの森林に対する政府間気候変動パネルの 既定値よりかなり高い (三分の二).
- アフリカの山岳林は幹の密度が低く,アフリカの低地林に似た大きな木がたくさんあります.
- 2000年以来,推定800万ヘクタールの 古いアフリカの山林が 失われてきました
結論:
- アフリカの熱帯山林は 炭素に富んだ重要な生態系です
- 現在の保全と再造林の取り組みは これらの森林の炭素貯蔵能力を過小評価しているかもしれません
- この生物多様性と炭素に富んだ生態系を 進行中の森林破壊から守るには 緊急に保全が必要です
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