栄養段階制御が地球変動下の生態系炭素蓄積を制約する
Trophic regulation constrains ecosystem carbon accumulation under global change (原題)
Changlin Xu, Yadvinder Malhi, Xincheng Li, Gukailin Ao, Lidong Mo, Shuotian Lai, Wenao Wu, Meng Pan, Shaopeng Wang, Jens‐Christian Svenning, Biao Zhu
🤖 gxceed AI 要約
日本語
世界132研究の708実験を統合し、地球変動要因が生態系炭素を平均27%増やす一方、草食動物との相互作用で23%の炭素損失が生じることを示した。炭素損失は地上部・リター・微生物に集中し、熱帯・乾燥地・水域で顕著。草食動物の排除は炭素蓄積を高めるが植物多様性を減らし、気候目標と生態系保全のトレードオフを明らかにした。
English
A global synthesis of 708 experiments from 132 studies shows that while global change factors increase ecosystem carbon stocks by 27% on average, interactions with herbivores cause 23% carbon losses, reversing gains. Losses are concentrated in aboveground, litter, and microbial carbon, especially in tropics and drylands. Excluding herbivores boosts carbon but reduces plant diversity, revealing a trade-off between climate and biodiversity goals.
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
日本では、気候変動適応策や自然再興（NbS）の設計において、生態系炭素蓄積の評価に動物の影響を組み込む必要性を示唆。特に、森林・草原管理やブルーカーボン生態系の保全政策に示唆を与える。
In the global GX context
This study underscores that carbon sequestration projections and nature-based solutions must account for trophic interactions, aligning with global frameworks like the TNFD and biodiversity-climate nexus discussions. It provides empirical evidence for integrating animal-mediated feedback into Earth system models and climate policy.
👥 読者別の含意
🔬研究者:Provides a global dataset and framework for incorporating trophic regulation into carbon cycle models and NbS assessments.
🏢実務担当者:Highlights the need to consider herbivore management in carbon offset projects and ecosystem restoration to avoid trade-offs.
🏛政策担当者:Informs climate and biodiversity policy integration, suggesting that carbon-focused strategies may undermine ecosystem integrity.
📄 Abstract（原文）
Global change is rapidly reshaping the ecosystem carbon cycle, yet how trophic regulation-a fundamental driver of ecosystem biogeochemical cycling-mediates these responses remains poorly understood. Here we present a global synthesis of interactions between trophic regulation and major global change factors (GCFs: fertilization, warming, fire, increased precipitation, drought, and multiple GCFs), integrating 708 paired full-factorial experimental tests across 132 studies worldwide. We show that while GCFs alone increase ecosystem carbon stocks by 27% on average, their interactions with herbivores drive carbon losses of 23%, reversing the potential gains from individual GCF effects. Carbon losses are functionally localized in aboveground plant, litter, and microbial biomass carbon, with the most pronounced depletion occurring in the tropics, drylands, aquatic systems, and restoring ecosystems. Herbivore body size emerged as a directional trait shaping these outcomes, with small-bodied herbivores exerting disproportionately negative effects. Importantly, while excluding herbivores enhances carbon accumulation under global change, this sequestration benefit comes at the cost of reduced plant diversity, revealing an inherent trade-off between carbon-centric objectives and ecosystem integrity. Together, our findings demonstrate that carbon sequestration potential under global change cannot be evaluated independently of trophic regulation. Accounting for animal-mediated feedback is therefore essential for realistic Earth system model projections and for developing nature-based solutions that align climate mitigation with biodiversity conservation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1073/pnas.2610728123first seen 2026-08-31 05:04:02
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