Microbial Perspective: Regulatory Mechanisms of Interactions Between Microplastics and Dissolved Organic Matter on Greenhouse Gas Emissions in Aquatic Ecosystems
微生物の視点：マイクロプラスチックと溶存有機物の相互作用が水生生態系の温室効果ガス排出に及ぼす制御メカニズム (AI 翻訳)
Mengxin Xu, Meiqi Huang, Shuang Liu, Jinze He, Feng Zhao, Bo Shao, Guangli Mu, Hongyang Cui, Panpan Cui, Yingxin Zhao, Yiwen Liu, Xiaoyu Cui, Yindong Tong
🤖 gxceed AI 要約
日本語
本研究は16の研究を統合し、マイクロプラスチック（MP）が水生生態系の温室効果ガス（CO2、CH4、N2O）排出に及ぼす影響をメタ分析。MP暴露はCO2排出を有意に増加させ、N2Oフラックスを減少させる一方、CH4は不確実。暴露期間やポリマー種が重要な調整因子であり、短期的には炭素無機化が抑制され、長期的には促進される傾向を示す。
English
This meta-analysis of 16 studies quantifies the net effects of microplastics on aquatic greenhouse gas emissions. MP exposure significantly increases CO2 emissions and decreases N2O fluxes, while CH4 shows no significant trend. Effect direction is moderated by exposure duration and polymer type, with short-term suppression and long-term enhancement of carbon mineralization. These findings help reconcile conflicting observations and improve predictions of MP climate impacts.
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
日本では海洋プラスチック問題が顕在化しており、MPが温室効果ガス排出に与える影響は、水圏生態系の炭素・窒素循環の観点から重要。ただし、本知見は日本の具体的な政策や開示枠組みに直接結びつくものではない。
In the global GX context
Globally, microplastic pollution is a growing concern with potential climate feedbacks. This synthesis provides quantitative evidence that MP can alter GHG fluxes, informing climate models and environmental policy. The context-dependency highlights the need for ecosystem-specific assessments.
👥 読者別の含意
🔬研究者:Researchers studying microplastic impacts on biogeochemical cycles can use these effect sizes and moderators for model parameterization.
🏛政策担当者:Policymakers addressing plastic pollution should consider potential indirect climate effects, though direct policy implications are limited until more ecosystem-specific data are available.
📄 Abstract（原文）
ABSTRACT Microplastic (MP) pollution may influence aquatic greenhouse gas (GHG) emissions by altering dissolved organic matter (DOM)–microbe coupling, yet reported effects remain inconsistent across ecosystems and exposure regimes. Here, we synthesized evidence from 16 studies to quantify the net effects of MPs on CO 2 , CH 4 , and N 2 O fluxes under ambient DOM conditions. Our meta‐analysis indicates that MP exposure significantly increases CO 2 emissions and decreases N 2 O fluxes, whereas CH 4 responses show a non‐significant positive trend with high variability. Exposure duration and polymer identity emerge as key moderators, indicating that MP effects are context‐dependent rather than uniform. Short‐term exposure tends to suppress carbon mineralization, whereas long‐term exposure is more often associated with GHG production, consistent with a time‐dependent trajectory potentially shaped by polymer aging. Mechanistically, this pattern may reflect initial DOM adsorption and humification that reduce substrate availability, followed by the release of bioavailable MP‐derived compounds that may stimulate microbial respiration, methanogenesis, and denitrification. Overall, MPs reshape aquatic carbon and nitrogen cycling within the overarching framework of DOM, which may ultimately influence GHG emissions under certain conditions. These findings provide a quantitative basis for reconciling conflicting observations and improving predictions of the climate relevance of MP pollution in aquatic ecosystems.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1111/gcb.70969first seen 2026-06-14 04:38:26 · last seen 2026-06-15 05:40:45
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