Here, we investigate the importance of net CH₄ production and emissions in the carbon (C) budget of a small productive lake by monitoring CH₄, CO₂, and O₂ for two consecutive years. During the study period, the lake was mostly a net emitter of both CH₄ and CO₂, while showing positive net ecosystem production. The analyses suggest that during the whole study period, 32% ± 26% of C produced by net ecosystem production was ultimately converted to CH₄ and emitted to the atmosphere. When converted to global warming potential, CH₄ emission (in CO₂ equivalents) was about 3–10 times higher than CO₂ removal from in‐lake net ecosystem production over 100‐yr and 20‐yr time frames, respectively. Although more work in similar systems is needed to generalize these findings, our results provide evidence of the important greenhouse gas imbalance in human‐impacted aquatic systems.

中文翻译：

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甲烷排放抵消了一个生产性小湖中二氧化碳的吸收

在这里，我们通过连续两年监测CH ₄，CO ₂和O ₂，调查小型生产性湖泊的碳（C）预算中净CH ₄产生和排放的重要性。在研究期间，该湖主要是CH ₄和CO ₂的净排放者，同时显示出正的净生态系统产量。分析表明，在整个研究期间，由生态系统净生产产生的C的32％±26％最终转化为CH ₄并排放到大气中。当转换为全球变暖潜能时，CH ₄排放量（以CO ₂当量计）约为CO _2的3-10倍分别在100年和20年的时间范围内从湖内净生态系统生产中清除温室气体。尽管需要更多类似系统的工作来概括这些发现，但我们的结果提供了证据，证明了人类影响的水生系统中温室气体的严重失衡。