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Planktonic nutrient regeneration and cycling efficiency in temperate lakes

机译:温带湖泊中浮游生物的养分再生和循环效率

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Planktonic nutrient regeneration is a fundamental process that maintains most of the primary productivity in marine and freshwater environments. However, there is no robust predictive model to describe the pattern and efficiency of nutrient cycling across aquatic systems. Based on rather weak evidence, the efficiency of nutrient regeneration is believed to decline along a gradient of productivity, so that nutrient-poor environments are assumed to be more efficient at cycling their nutrients than are nutrient-rich environments. Here we measure phosphorus regeneration directly and show that cycling efficiency does not vary with phosphorus concentration. In addition, we confirm that the phosphorus supply for lake plankton comes primarily from within the plankton community, rather than from external loading or from larger organisms such as fish.
机译:浮游生物营养物再生是一个基本过程,可在海洋和淡水环境中维持大部分初级生产力。但是,没有可靠的预测模型来描述整个水生系统中养分循环的模式和效率。基于相当薄弱的证据,据信养分再生的效率会随着生产力的梯度而下降,因此认为养分贫乏的环境在循环养分方面比养分丰富的环境更有效。在这里,我们直接测量磷的再生,并表明循环效率不会随磷浓度而变化。此外,我们确认了湖浮游生物的磷供应主要来自浮游生物群落内部,而不是来自外部负荷或鱼类等较大的生物。

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