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- W2897713558 abstract "Ecosystems persist over geological timescales by continuously cycling nutrients. However, we lack a quantitative model of how diverse organisms organize with respect to one another. We observe these dynamics in a quasi-two-dimensional microbial ecosystem, in which all microbes live within the penetration depths of oxygen and light. This community is composed of both photosynthetic bacteria, which produce sugars and oxygen, and aerobic bacteria, which consume oxygen and sugars. Shinning a light on the community drives a nutrient cycle between these two groups of microbes. Illuminating a spot, we measure the resulting distribution of oxygen. Under normal conditions, diffusion alone stabilizes oxygen gradients. However, at freezing temperatures or low atmospheric oxygen concentration, the kinetics of microbial oxygen production and consumption dominate. Surprisingly, after three weeks, the initially uniform distribution of oxygen in the spot becomes an annulus. We present a robust method to invert the measured oxygen concentration for the distribution of oxygen sources and sinks." @default.
- W2897713558 created "2018-10-26" @default.
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- W2897713558 date "2018-10-16" @default.
- W2897713558 modified "2023-10-15" @default.
- W2897713558 title "Oxygen dynamics in a two-dimensional microbial ecosystem" @default.
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- W2897713558 doi "https://doi.org/10.1103/physreve.98.042409" @default.
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