Constraints on microbial metabolism drive evolutionary diversification in homogeneous environments |
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Authors: | Gudelj I Beardmore R E Arkin S S MacLean R C |
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Institution: | Department of Mathematical Sciences, University of Bath, Bath, UK. i.gudelj@maths.bath.ac.uk |
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Abstract: | Understanding the evolution of microbial diversity is an important and current problem in evolutionary ecology. In this paper, we investigated the role of two established biochemical trade-offs in microbial diversification using a model that connects ecological and evolutionary processes with fundamental aspects of biochemistry. The trade-offs that we investigated are as follows:(1) a trade-off between the rate and affinity of substrate transport; and (2) a trade-off between the rate and yield of ATP production. Our model shows that these biochemical trade-offs can drive evolutionary diversification under the simplest possible ecological conditions: a homogeneous environment containing a single limiting resource. We argue that the results of a number of microbial selection experiments are consistent with the predictions of our model. |
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Keywords: | biochemical trade‐offs chemostat ecology experimental evolution mathematical model micro‐organisms |
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