土壤磷素迁移数学模型中的准稳态吸收和细菌群落聚集
Quasi-steady uptake and bacterial community assembly in a mathematical model of soil-phosphorus mobility
摘要：
我们数学模型的磷的吸收由一个植物和两个细菌群组成的土壤群落：互补营养和寡养。出现了四种平衡状态，一种是每个物种垄断资源并统治社区，另一种是所有物种共存。我们表明，动力学控制的化学吸附细菌死亡的比率允许振荡状态或准稳态摄取。我们展示了一个稳定的状态是如何出现的，土壤和植物养分含量对施肥量的增加没有反应。然而，额外的施肥支持共生体导致社区重组。我们的研究结果表明，在养分吸收实验中的时间序列测量的重要性。
英文摘要：
We mathematically model the uptake of phosphorus by a soil community consisting of a plant and two bacterial groups: copiotrophs and oligotrophs. Four equilibrium states emerge, one for each of the species monopolising the resource and dominating the community and one with coexistence of all species. We show that the dynamics are controlled by the ratio of chemical adsorption to bacterial death permitting either oscillatory states or quasi-steady uptake. We show how a steady state can emerge which has soil and plant nutrient content unresponsive to increased fertilization. However, the additional fertilization supports the copiotrophs leading to community reassembly. Our results demonstrate the importance of time-series measurements in nutrient uptake experiments.
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