Contrasting fates of detritus in mangrove sediments: Microbial trade‐offs between carbon storage and greenhouse gas emissions
マングローブ堆積物におけるデトリタスの対照的な運命：炭素貯蔵と温室効果ガス排出の微生物トレードオフ (AI 翻訳)
Yuxing Hu, Qi Chen, Xiaomeng Wang, Yihua Cai, Guangyi Su, Yunxuan Li, Chen He, Quan Shi, Zekun Zhang, Ding He, Christian Lønborg, Nianzhi Jiao, Qiang Zheng
🤖 gxceed AI 要約
日本語
本研究では、マングローブの主要なデトリタス（葉と大型藻類）の微生物代謝による運命を1年間の現場培養と高分解能分子・微生物解析で解明。有機炭素の約50%がCO2に、葉で7.5%、藻類で9.7%がメタンに変換され、葉由来炭素の33.8%が長期貯蔵に寄与した。メタン排出は純生態系生産量の11.1%を相殺し、マングローブ生態系の気候便益評価にはCO2とCH4の両方を考慮する必要がある。
English
This study investigated the fate of mangrove detritus (leaves and macroalgae) through a one-year in situ incubation with high-resolution molecular and microbial analyses. Approximately 50% of added organic carbon was mineralized to CO2, while 7.5% (leaves) and 9.7% (macroalgae) were emitted as methane. Leaf-derived carbon contributed 33.8% to longer-term storage. Methane emissions offset 11.1% of net ecosystem productivity, highlighting the need to account for both CO2 and CH4 when assessing climate benefits of mangroves.
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
日本ではブルーカーボン生態系としてマングローブの保全・植林が進められており、その気候変動緩和効果を正確に評価するには、炭素貯留だけでなくメタン排出も考慮する必要があることを示す。本研究成果は、日本のブルーカーボンクレジット制度やJブルークレジットの方法論改良に資する。
In the global GX context
This study provides critical empirical data on the trade-off between carbon storage and methane emissions in mangrove sediments, directly relevant to global blue carbon accounting and carbon crediting methodologies. It emphasizes that net climate benefits of mangroves cannot be assessed based solely on carbon sequestration rates but must include greenhouse gas emissions, informing ISSB and other disclosure frameworks for nature-based solutions.
👥 読者別の含意
🔬研究者:This paper offers detailed molecular and microbial insights into the fate of mangrove detritus, quantifying the trade-off between carbon storage and greenhouse gas emissions, which is valuable for biogeochemical modeling.
🏢実務担当者:Blue carbon project developers can use these findings to improve greenhouse gas accounting for mangrove restoration, ensuring methane emissions are not ignored in carbon credit calculations.
🏛政策担当者:Policymakers designing carbon crediting schemes for mangroves should incorporate methane emission factors to avoid overestimating climate benefits.
📄 Abstract（原文）
Abstract Mangroves are known as important carbon storage hotspots, yet their net climate benefit can be offset by large greenhouse gas emissions. In this study, we conducted a 1‐yr in situ incubation coupled with high‐resolution molecular and microbial analyses to elucidate the fate of two major types of mangrove detritus, including leaves ( Kandelia obovata and Sonneratia apetala ) and macroalgae ( Ulva prolifera ), via microbial metabolism. Approximately 50% of the added organic carbon from both sources was mineralized to CO 2 , while 7.5% (leaves) and 9.7% (macroalgae) were emitted as methane (CH 4 ). Around 33.8% of the leaf‐derived and 2.1% of the macroalgae‐derived organic carbon contributed to longer‐term carbon storage. CH 4 emissions from leaf litter offset approximately 11.1% of the net ecosystem productivity and were positively correlated with molecular formulas assigned to the aliphatic‐like group and with sulfur‐ and phosphorus‐containing molecular formulas. CH 4 production was initially dominated by methylotrophic methanogenesis (mostly Methanolobus ), followed by more diverse pathways associated with Methanosarcina . Our results demonstrate that different types of mangrove detritus have distinct effects on sediment biogeochemistry and greenhouse gas emissions and highlight the need to account for both CO 2 and CH 4 emissions when assessing the climate benefits of mangrove ecosystems.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1002/lno.70468first seen 2026-07-30 06:36:02
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