Dynamics of local adaptation in a stable environmental gradient

Edvin Memet; Ned S. Wingreen; Yigal Meir

doi:10.1103/PhysRevResearch.3.L042026

Dynamics of local adaptation in a stable environmental gradient

Edvin Memet, Ned S. Wingreen, Yigal Meir

Princeton University

Research output: Contribution to journal › Article › peer-review

Abstract

Microbial populations in nature generally inhabit extended environments with substantial spatial variation in ecological factors: light intensity in the ocean, temperature in geothermal hot springs, or a variety of chemical concentrations including salt and pH. In such continuously varying environments, it remains unclear why a finite number of subpopulations form and how this number is set. Here we show that a model of asexual evolution in a gradient maps onto a no-gradient neutral model, and by mapping this model to a gas of kinks and antikinks, we derive the full distribution of the number of coexisting lineages, and their correlation functions. Testing these predictions in controlled laboratory experiments would provide valuable insights into many real-world microbial communities.

Original language	American English
Article number	L042026
Journal	Physical Review Research
Volume	3
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevResearch.3.L042026
State	Published - Dec 2021

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevResearch.3.L042026

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title = "Dynamics of local adaptation in a stable environmental gradient",

abstract = "Microbial populations in nature generally inhabit extended environments with substantial spatial variation in ecological factors: light intensity in the ocean, temperature in geothermal hot springs, or a variety of chemical concentrations including salt and pH. In such continuously varying environments, it remains unclear why a finite number of subpopulations form and how this number is set. Here we show that a model of asexual evolution in a gradient maps onto a no-gradient neutral model, and by mapping this model to a gas of kinks and antikinks, we derive the full distribution of the number of coexisting lineages, and their correlation functions. Testing these predictions in controlled laboratory experiments would provide valuable insights into many real-world microbial communities.",

author = "Edvin Memet and Wingreen, {Ned S.} and Yigal Meir",

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AB - Microbial populations in nature generally inhabit extended environments with substantial spatial variation in ecological factors: light intensity in the ocean, temperature in geothermal hot springs, or a variety of chemical concentrations including salt and pH. In such continuously varying environments, it remains unclear why a finite number of subpopulations form and how this number is set. Here we show that a model of asexual evolution in a gradient maps onto a no-gradient neutral model, and by mapping this model to a gas of kinks and antikinks, we derive the full distribution of the number of coexisting lineages, and their correlation functions. Testing these predictions in controlled laboratory experiments would provide valuable insights into many real-world microbial communities.

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Dynamics of local adaptation in a stable environmental gradient

Abstract

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