短期の地下水位低下が泥炭地の微生物の炭素獲得特性と微生物由来炭素プールを変化させる
Short-term water-table drawdown alters microbial carbon-acquisition attributes and microbial-derived carbon pools in peatlands (原題)
Jiatao Zhu, Liu Hua-bing, Mai–He Li, Mohammad Bahram, James D. Bever, Jun‐Qin Gao, Qian-Wei Li, Fei‐Hai Yu
🤖 gxceed AI 要約
日本語
青海チベット高原の高山泥炭地で地下水位低下を操作し、微生物群集と微生物由来炭素プールへの影響を調査。水位低下は微生物バイオマスと残渣を減少させ、微生物由来炭素プールを縮小する一方、加水分解・リグニン分解遺伝子と酵素活性を増加させた。好気性分解菌（Sphingorhabdus等）が優占化し、水位管理の重要性を示唆。
English
In an alpine peatland on the Qinghai-Tibetan Plateau, experimental water-table drawdown reduced microbial biomass and residues, shrinking microbial-derived carbon pools, while increasing hydrolytic and ligninolytic gene abundances and enzyme activities. Taxonomic shifts favored aerobic decomposers like Sphingorhabdus and Gemmatimonas, highlighting the role of water-level management in maintaining peatland carbon storage.
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
日本の泥炭地（釧路湿原など）の保全や炭素貯留管理に示唆を与える。気候変動適応策としての水位管理の重要性を裏付ける基礎研究であり、GX政策における生態系炭素貯留の評価に貢献しうる。
In the global GX context
This study provides empirical evidence on how hydrological changes affect peatland carbon dynamics, relevant to global climate mitigation strategies that rely on natural carbon sinks. It underscores the importance of water-level management in preserving peatland carbon stocks, informing international frameworks like the Paris Agreement's nature-based solutions.
👥 読者別の含意
🔬研究者:Provides mechanistic insights into microbial controls on peatland carbon pools under hydrological change, useful for carbon cycle modeling.
🏢実務担当者:Informs land management practices for peatland conservation and carbon storage, relevant for nature-based solution projects.
🏛政策担当者:Highlights the need for water-level management policies to protect peatland carbon sinks, supporting climate adaptation and mitigation goals.
📄 Abstract（原文）
Abstract Soil microbes and their mediation of biogeochemical processes play critical roles in soil organic carbon (SOC) formation and persistence and can be significantly affected by water-table changes in peatlands. However, it is still unclear how water-table changes alter microbial attributes associated with microbial-derived carbon (C) pools, particularly in peatlands where soils have very high organic matter and low redox potential. We manipulated water-table declines in an alpine peatland on the Qinghai-Tibetan Plateau, measured soil microbial composition and microbial attributes (e.g. extracellular enzyme activities, and hydrolytic and ligninolytic gene abundances), and quantified living microbial biomass (via microbial biomass carbon) and microbial residues (via amino sugar biomarkers). Declining water tables reduced both living microbial biomass and microbial residues, thereby decreasing microbial-derived C pools, but increased hydrolytic and/or ligninolytic gene abundances and enzyme activities, suggesting enhanced microbial C-acquisition attributes. Water-table decline and the associated reduction in soil water content induced taxonomic shifts in the microbial community with significant phylogenetic signals, indicating that hydrological change acts as an environmental filter favoring aerobic C-decomposing taxa such as Sphingorhabdus and Gemmatimonas. Our findings highlight that these microbial responses, together with shifts in key microbial taxa, influence the effects of water-table changes on microbial-derived C pools in peatlands, and point out the importance of water level management in maintaining peatlands.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1093/jpe/rtag199first seen 2026-08-27 05:05:51
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