Understory diversity is positively associated with overstory carbon sequestration
Yakun Zhang, Rui Zhang, Scott X. Chang, Han Y. H. Chen, Anthony R. Taylor, Masumi Hisano, Chen Chen, Sai Peng, Ya Wang, Xin Chen, Jiasheng Wu, Xinli Chen, Peter B. Reich
🤖 gxceed AI 要約
日本語
カナダ国家森林インベントリを用い、林床植生（草本・コケ・低木）の多様性と樹木・土壌の炭素蓄積の関係を気温・水分・窒素沈着の環境勾配に沿って分析した。草本とコケの種 richness は10年スケールの樹木炭素蓄積と正に関連し、温暖・乾燥・窒素制限下で効果が強い。土壌炭素との一貫した関連は見られなかった。
English
Using Canada's National Forest Inventory, the study tests whether understory diversity (shrubs, herbs, bryophytes) is associated with tree and soil carbon accumulation across temperature, moisture, and nitrogen gradients. Herb and bryophyte richness were positively linked to decadal tree carbon accrual, strongest at warmer, drier, N-limited sites, with no consistent soil-carbon association. Raising richness from minimum to median corresponded to 15% and 6% gains in tree carbon accumulation.
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
森林吸収源は日本のGX・カーボンニュートラル政策やJ-クレジット森林分野の基礎となるが、本論文は林床植生という新規視点を提供するにとどまり、開示・制度との直接接続は弱い。
In the global GX context
Forest sinks underpin national net-zero and nature-related disclosure (TNFD) agendas; this paper adds a multistratal biodiversity angle to carbon-sequestration science, though it does not directly address TCFD/ISSB disclosure mechanics.
👥 読者別の含意
🔬研究者:林床多様性を含む多層的な生物多様性–生態系機能関係の大規模実証として参照価値がある。
🏢実務担当者:森林関連事業者・林業サプライチェーンが生物多様性保全と炭素吸収の共便益を検討する際の根拠になりうる。
🏛政策担当者:森林吸収源政策や生物多様性保全策の設計で林床植生管理を考慮する根拠を提供する。
📄 Abstract（原文）
Forests are a major terrestrial carbon sink, and higher overstory diversity is often associated with greater carbon accrual in trees and soils. Yet the contribution of the understory vegetation, the most species-rich forest stratum, to tree and soil carbon accumulation remains largely unknown. Here, we analyzed Canada’s National Forest Inventory database to explore whether understory diversity (richness and evenness of shrubs, herbs, and bryophytes) is associated with carbon accumulation in overstory trees and soils across environmental gradients of air temperature, climate moisture, and nitrogen deposition. We found that herb and bryophyte species richness were positively associated with decadal tree carbon accumulation, with the strongest effects at warmer, drier, and nitrogen-limited sites. In contrast, understory diversity showed no consistent association with soil carbon accumulation. On a decadal scale, increasing herb and bryophyte species richness from their minimum to median values corresponded to 15% and 6% increases in tree carbon accumulation, respectively. These results provide large-scale observational evidence that diversity in lower vegetation layers is positively associated with overstory carbon sequestration and reveal strong environmental modulation of these multistratal biodiversity–ecosystem functioning relationships. These findings suggest that species-rich herb and bryophyte communities should be considered in strategies for sustaining forest carbon sinks, especially under warmer, drier conditions and nutrient limitation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1073/pnas.2615624123first seen 2026-10-21 04:42:50
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