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Dynamics and productivity of microalgae in presence of predators ?

机译:在捕食者存在下微藻的动态和生产力

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This paper is concerned with the dynamics and the productivity of biomass in a continuous microalgae culture contaminated by predators. We propose a general model describing a cultivation system where photolimited microalgae are grazed by zooplankton. We state necessary and sufficient conditions for the existence of a coexistence equilibrium. If this equilibrium exists, then microalgae and predators converge either to it or to a globally asymptotically stable periodic solution. In absence of the coexistence equilibrium, any solution approaches either an equilibrium characterized by the presence of algae and the absence of predators, or the washout equilibrium. This description of the dynamics allows to define the microalgae productivity in the long-term(i.e.when an attracting set is reached). With the help of numerical simulations, we show that operating the system at optimal (constant) dilution rate triggers the extinction of predators.
机译:本文涉及由捕食者污染的连续微藻培养中生物质的动态和生产力。 我们提出了一般模型,描述了一种培养系统,在浮游动物留下了光致密的微藻。 我们在存在共存均衡的必要和充分条件下。 如果存在这种平衡,则微藻和捕食者会聚到它或全局渐近稳定的周期性溶液。 在没有共存平衡的情况下,任何解决方案都接近了藻类存在的平衡和捕食者的缺失,或冲洗平衡。 这种动态的描述允许在长期(即达到吸引集时的微血脂生产率。 在数值模拟的帮助下,我们表明,在最佳(恒定)稀释率下操作系统触发捕食者的灭绝。

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