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Carbon dioxide supersaturation promotes primary production in lakes

机译：二氧化碳过饱和促进了湖泊的初级生产

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摘要

A majority of the world's lakes are supersaturated with respect to carbon dioxide (CO _2). By experimental manipulation of the CO _2 concentration in supersaturated boreal lakes, we demonstrate that phytoplankton primary production was up to 10 times higher in supersaturated lake water in comparison with water with CO _2 at equilibrium concentrations and that CO _2, together with nutrients, explained most of the variation in pelagic primary production and phytoplankton biomass over a wide variety of unproductive lakes. These results suggest that phytoplankton can be co-limited by CO _2 and nutrients in unproductive lakes. As import of terrestrial organic carbon and its subsequent microbial mineralisation in lakes is a driving force of CO _2-supersaturation our results suggest that lake productivity and carbon cycling may respond to variations in terrestrial organic carbon export, (e.g. caused by land use or climate change) in ways not described before.
机译：世界上大多数湖泊的二氧化碳（CO _2）含量过饱和。通过对过饱和北方湖泊中CO _2浓度的实验控制，我们证明，过饱和湖泊水中的浮游植物初级生产力是平衡浓度下含CO _2的水的十倍之多，而CO _2和营养素的解释最多。各种非生产性湖泊中上层初级生产和浮游植物生物量的变化这些结果表明，在非生产性湖泊中，浮游植物可以被CO _2和养分共同限制。由于湖泊中陆地有机碳的进口及其随后的微生物矿化作用是CO _2过饱和的驱动力，我们的结果表明，湖泊生产力和碳循环可能对陆地有机碳出口的变化做出反应（例如，由土地利用或气候变化引起的） ）的方式之前未作介绍。

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