Assessing the contribution of euphausiids’ fecal pellets to greenhouse gas inventories in the Eastern South Pacific
東南太平洋におけるオキアミ糞粒の温室効果ガスインベントリへの寄与の評価 (AI 翻訳)
Paula M. Ruz-Moreno, Marcela Cornejo-D’Ottone, Macarena Díaz-Astudillo, Iohandy Skamiotis-Gómez, Ramiro Riquelme-Bugueño
🤖 gxceed AI 要約
日本語
東南太平洋の混合層において、オキアミの糞粒がCO2、N2O、CH4のインベントリに与える寄与を評価した。実験の結果、オキアミ群集の寄与は各GHGの過剰・不足の1%未満であり、糞粒はGHGの発生源にも吸収源にもなり得ることを示した。これは、動物プランクトン糞粒からのGHG生成を同時定量した初の研究であり、気候変動シナリオ下での基礎データを提供する。
English
This study evaluates the contribution of krill fecal pellets to greenhouse gas (CO2, N2O, CH4) inventories in the mixed layer of the Eastern South Pacific. Experiments show that krill assemblages contribute less than 1% to the excess/deficit of each GHG, indicating that fecal pellets can act as both sources and sinks. This is the first simultaneous quantification of GHG production in zooplankton fecal pellets, providing a baseline for future changes in upwelling ecosystems.
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、海洋生態系のGHG動態理解は気候変動予測の基礎として重要。日本周辺海域のGHGインベントリ精緻化や、海洋由来の自然排出・吸収の評価に示唆を与える可能性がある。
In the global GX context
This paper contributes to global understanding of natural GHG sources and sinks in marine ecosystems, which is relevant for refining national GHG inventories and climate models. It highlights the role of zooplankton in biogeochemical cycles, offering insights for blue carbon and ocean-based climate mitigation strategies.
👥 読者別の含意
🔬研究者:Provides baseline data on zooplankton fecal pellet GHG production, useful for marine biogeochemistry and climate modeling.
🏛政策担当者:Informs on natural GHG fluxes in upwelling regions, relevant for national inventory reporting and blue carbon policy.
📄 Abstract（原文）
The Eastern South Pacific (ESP) is a highly heterogeneous environment, characterized by a productivity gradient that goes from eutrophic waters in the coastal zone to ultraoligotrophic waters in the center of the South Pacific Gyre. Its coastal region is a significant source of CO 2 , CH 4 , and N 2 O to the atmosphere, mainly due to upwelled subsurface waters high in greenhouse gases (GHGs), where microbial processes produce these gases through the remineralization of organic matter. Few studies have assessed the contribution that microbial processes within particles, especially those rich in organic matter such as fecal pellets, could make to GHG inventories. We aimed to evaluate whether krill fecal pellets generated in the surface layer contribute to GHG inventories (CO 2 , N 2 O, and CH 4 ) in the mixed layer. Experiments were conducted at four stations along a zonal transect near 27° S on board the CIMAR 26 Oceanic Island Expedition (June-July, 2022). The estimated contribution of a krill assemblage was less than 1% of the excess/deficit of each GHG, which, due to experimental limitations that introduced uncertainties, rather than providing absolute values for contribution or consumption, our results should be viewed as a potential range, indicating that krill fecal pellets can act as both sources and sinks of GHGs. Still, this contribution also depends on fecal pellet production rates and the abundance of krill assemblages, suggesting that large krill aggregations can contribute to changes in local GHG concentrations. This study represents the first effort to simultaneously quantify CO 2 , N 2 O, and CH 4 production in zooplankton fecal pellets and assess their contribution to GHG inventories in the ESP, providing a baseline for quantifying future changes in GHG production in upwelling ecosystems and the open ocean under a climate change scenario.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.3389/fmars.2026.1743607first seen 2026-08-13 05:58:01
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