Hydrodynamic Disturbance-Driven Suppression of Microbial Necromass Carbon Accumulation in Lateral Carbon Migration
横断的炭素移動における微生物ネクロマス炭素蓄積の水力学的外乱による抑制 (AI 翻訳)
Aoqi Zeng, Zhongwu Li, Shilan Wang, Xiaodong Nie
🤖 gxceed AI 要約
日本語
本研究は、河川システムなどの水陸移行帯における水力学的外乱が、微生物ネクロマス炭素（MNC）の蓄積を抑制するメカニズムを実験的に解明した。外乱によりMNCのSOCへの寄与が有意に低下し、その経路として脱着-無機化の正のフィードバックと再合成の負のフィードバックが特定された。これらの知見は、侵食を受けやすい地域での土壌炭素保全戦略に示唆を与える。
English
This study experimentally reveals that hydrodynamic disturbances in aquatic-terrestrial interfaces suppress microbial necromass carbon (MNC) accumulation, reducing its contribution to soil organic carbon. Key mechanisms include positive desorption-mineralization feedback and negative re-synthesis feedback. Findings inform soil carbon conservation strategies in erosion-prone regions.
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
日本の農地や河川流域における土壌炭素貯留は、地球温暖化対策として注目されており、本研究成果は侵食対策や土壌管理の最適化に資する可能性がある。ただし、直接的な政策連動や開示要件との関連は薄い。
In the global GX context
This research contributes to the understanding of soil carbon dynamics, relevant to global climate mitigation efforts. It provides insights for soil conservation and carbon management, though it does not directly address disclosure frameworks or transition finance.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into soil carbon dynamics under hydrodynamic disturbance, useful for carbon cycle modeling.
🏛政策担当者:May inform soil conservation and land management policies aimed at enhancing carbon sequestration.
📄 Abstract（原文）
Microbial necromass carbon (MNC), a critical component of the soil organic carbon (SOC) pool, constitutes a key component on global carbon cycling via the dynamic equilibrium between its formation and decomposition. In aquatic-terrestrial interfaces (e.g., river systems), hydrodynamic disturbances may critically regulate the fate of MNC during terrestrial-to-aquatic carbon transport. However, dynamic responses of MNC to hydrodynamic disturbances during lateral transport remain systematically underexplored. This study employed controlled experiments simulating lateral transport processes to unravel hydrodynamic disturbance-driven MNC depletion mechanisms. Results demonstrated that hydrodynamic disturbances significantly reduced the contribution of MNC to SOC (disturbance treatment: 46.65% vs. control: 55.17%; P < 0.001). In contrast, inundation alone (static water treatment: 59.32% vs. control: 55.17%; P > 0.05) exerted negligible influence. Path analysis revealed the core mechanisms of hydrodynamic suppression on MNC accumulation: (1) triggering positive “desorption-mineralization” feedback by destabilizing MNC occurrence forms and enhancing hydrolytic enzyme activity (path coefficient = 0.60, P < 0.05); (2) generating negative “re-synthesis” feedback through reduced microbial biomass inputs (path coefficient = -0.48, P < 0.05). Synergistic interactions between these coupled pathways ultimately suppressed MNC accumulation (standardized total effect = -0.39). These findings advance theoretical understanding of carbon cycling during lateral transport and provide critical insights for optimizing soil carbon conservation and ecological management strategies in erosion-prone regions.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.iswcr.2026.100709first seen 2026-08-16 05:02:02
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