ウガンダのパピルス湿地における植物と泥炭土壌からの二酸化炭素・メタン排出
Carbon dioxide and methane emissions from plants and peat soil in a Cyperus papyrus wetland in Uganda (原題)
Jenny Farmer, Jo Smith, Helen Burton, Yit Arn Teh
🤖 gxceed AI 要約
日本語
ウガンダ東部のパピルス湿地で、植物由来および拡散によるCO2・CH4排出を月次で観測。雨季にCH4の強い放出源となり、植物経由のCH4フラックスは平均3.6 nmol stem-1 s-1、拡散排出は918 nmol m-2 s-1。乾季には従属栄養呼吸によるCO2排出が最大。水位が排出に有意な影響を与えることを示し、アフリカ熱帯泥炭地の炭素循環データを補完する初の植物直接観測。
English
This study measured plant-mediated and diffusive CO2 and CH4 emissions in a Ugandan papyrus wetland. The wetland was a strong CH4 source in the rainy season, with plant-mediated fluxes averaging 3.6 nmol stem-1 s-1 and diffusive emissions 918 nmol m-2 s-1. Heterotrophic CO2 emissions peaked in the dry season. Water levels significantly influenced emissions. This is the first direct observation of CH4 from C. papyrus, contributing to scarce data on African tropical peatlands.
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GX文脈では直接的な関連は薄いが、熱帯泥炭地の排出係数データは国際的な炭素会計や気候変動緩和策の基礎資料として、日本企業のサプライチェーン排出量算定や国際協力事業に間接的に寄与し得る。
In the global GX context
This paper provides empirical emission factors from African tropical peatlands, which are underrepresented in global carbon accounting. It supports the refinement of national GHG inventories and informs international climate policy, particularly for tropical wetland conservation and restoration under the UNFCCC framework.
👥 読者別の含意
🔬研究者:Provides rare field data on CH4 and CO2 fluxes from African papyrus wetlands, useful for refining tropical wetland emission models.
🏛政策担当者:Highlights the significance of tropical peatlands as methane sources, informing conservation and land-use policies.
📄 Abstract（原文）
Tropical wetlands contribute significantly to global carbon dioxide (CO2) and methane (CH4) emissions; however, gaps exist in understanding emissions sources and drivers, especially in African peatlands. We captured plant-mediated and diffusive CH4 and CO2 emissions from monthly chamber sampling from both plants and soils in an intact Cyperus papyrus wetland in Eastern Uganda. This wetland was a strong source of atmospheric CH4 in the rainy season, with monthly plant-mediated CH4 fluxes averaging 3.6 ± 0.8 nmol CH4 stem-1 s-1 (± s.e. ), and monthly diffusive CH4 emissions averaging 918 ± 96 nmol CH4 m-2 s-1. Heterotrophic CO2 emissions sampled from trenched plots were highest during the dry season with a mean of 3410 ± 212 nmol CO2 m-2 s-1 over this period. Stem measurements varied seasonally in stem count and biomass, with higher C. papyrus biomass in the dry season, averaging 1888 ± 130 g dry biomass m-2. Linear models showed a significant effect of water levels on CH4 and CO2 emissions from soils and plants (p < 0.1 to p < 0.001). This study is the first to observe CH4 emissions directly from the C. papyrus plant and contributes to the limited datasets on carbon cycling in these systems. A French translation of this abstract is available in the supplementary material. This article is part of the discussion meeting issue 'African tropical peatlands: function, value and vulnerability'.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1098/rstb.2025.0048first seen 2026-08-22 04:57:31
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