ベトナム中部の伐採後熱帯林における純炭素回復は認められない
No net carbon recovery in logged tropical forests in central Vietnam (原題)
Amy C. Bennett, Suzanne M. Stas, Khiêm Ngọc Trương, Hoàng Ngọc Phạm, Hieu Dang Tran, Tinh Cong Le, Robyn Wrigley, Oliver Lawrence Phillips, Dominick Vincent Spracklen
🤖 gxceed AI 要約
日本語
ベトナム中部の選択的伐採後熱帯林24地点を2016〜2024年に反復調査した結果、地上部炭素の純蓄積はゼロと区別できなかった。最高気温の上昇が炭素増加を強く抑制しており、温暖化が既に森林生産性を制約している可能性を示す。回復速度はIPCCベンチマークや従来の東南アジア報告値を大きく下回り、地域固有の長期データなしの炭素評価は隔離ポテンシャルを過大評価するリスクがある。
English
Repeated inventories of 24 permanent plots in selectively logged forests in central Vietnam (2016–2024) show net aboveground carbon uptake indistinguishable from zero. Higher maximum temperatures were strongly linked to reduced carbon gains, suggesting warming already constrains productivity. Recovery rates fall well below IPCC benchmarks and prior Southeast Asian estimates, warning that carbon frameworks lacking local data risk overestimating sequestration potential.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本企業の森林クレジット調達やScope3・生物多様性開示において、東南アジア熱帯林の炭素隔離を前提としたオフセット戦略の前提が揺らぐ可能性を示す。SSBJや有報での自然関連開示を検討する際、地域固有データの重要性を裏付ける。
In the global GX context
Challenges the assumption of predictable carbon recovery underpinning nature-based offset and removal claims relevant to TCFD/ISSB and CSRD biodiversity disclosures. Highlights the need for site-specific data in carbon accounting frameworks and restoration-linked transition finance.
👥 読者別の含意
🔬研究者:熱帯林炭素回復の空間不均一性と温暖化影響を定量化した長期実証データを提供する。
🏢実務担当者:森林オフセットや自然資本クレジットの調達・主張の前提を見直す根拠となる。
🏛政策担当者:IPCCベンチマークに依存した炭素評価・気候緩和策の地域校正の必要性を示す。
📄 Abstract（原文）
Abstract Tropical forests recovering from logging are widely assumed to rapidly accumulate carbon. However, in Southeast Asia, where a legacy of high-intensity logging and climate change may modulate recovery trajectories, uncertainties remain about the rate and spatial heterogeneity of aboveground biomass recovery and the long-term stability of the forest carbon sink. Here we show no evidence of net aboveground carbon accumulation in naturally regenerating, selectively logged forests in central Vietnam. Based on the repeated inventories of 24 permanent plots (2016–2024) nearly two decades after 25 years of logging ceased, net carbon uptake was indistinguishable from zero (0.004 Mg C ha −1 yr −1 , 95% CI: −0.38, 0.38). Higher maximum temperatures were strongly associated with reduced carbon gains, suggesting that warming may already be constraining forest productivity. Observed recovery rates are significantly lower than the Intergovernmental Panel on Climate Change benchmarks and previously reported rates for Southeast Asian forests. Our results challenge the assumption of rapid and predictable carbon recovery in degraded tropical forests. Nevertheless, these forests maintained existing carbon stocks throughout monitoring, with no detectable net carbon loss. Carbon assessment frameworks that do not incorporate local data risk overestimating sequestration potential. Consequently, site-specific, long-term data are essential for calibrating restoration strategies, improving carbon estimates and informing climate mitigation policies in a warming world.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1088/1748-9326/ae9969first seen 2026-10-05 05:16:57
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