feedback between population and evolutionary dynamics determines the fate of social microbial populations.

The evolutionary spread of cheater strategies can destabilize populations engaging in social cooperative behaviors, thus demonstrating that evolutionary changes can have profound implications for population dynamics. At the same time, the relative fitness of cooperative traits often depends upon pop...

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Autores principales:	Alvaro Sanchez, Jeff Gore
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/0cd4d7b1dbcb4607a2aea4a311183e3e
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spelling	oai:doaj.org-article:0cd4d7b1dbcb4607a2aea4a311183e3e2021-11-18T05:37:08Zfeedback between population and evolutionary dynamics determines the fate of social microbial populations.1544-91731545-788510.1371/journal.pbio.1001547https://doaj.org/article/0cd4d7b1dbcb4607a2aea4a311183e3e2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23637571/?tool=EBIhttps://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885The evolutionary spread of cheater strategies can destabilize populations engaging in social cooperative behaviors, thus demonstrating that evolutionary changes can have profound implications for population dynamics. At the same time, the relative fitness of cooperative traits often depends upon population density, thus leading to the potential for bi-directional coupling between population density and the evolution of a cooperative trait. Despite the potential importance of these eco-evolutionary feedback loops in social species, they have not yet been demonstrated experimentally and their ecological implications are poorly understood. Here, we demonstrate the presence of a strong feedback loop between population dynamics and the evolutionary dynamics of a social microbial gene, SUC2, in laboratory yeast populations whose cooperative growth is mediated by the SUC2 gene. We directly visualize eco-evolutionary trajectories of hundreds of populations over 50-100 generations, allowing us to characterize the phase space describing the interplay of evolution and ecology in this system. Small populations collapse despite continual evolution towards increased cooperative allele frequencies; large populations with a sufficient number of cooperators "spiral" to a stable state of coexistence between cooperator and cheater strategies. The presence of cheaters does not significantly affect the equilibrium population density, but it does reduce the resilience of the population as well as its ability to adapt to a rapidly deteriorating environment. Our results demonstrate the potential ecological importance of coupling between evolutionary dynamics and the population dynamics of cooperatively growing organisms, particularly in microbes. Our study suggests that this interaction may need to be considered in order to explain intraspecific variability in cooperative behaviors, and also that this feedback between evolution and ecology can critically affect the demographic fate of those species that rely on cooperation for their survival.Alvaro SanchezJeff GorePublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 11, Iss 4, p e1001547 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biology (General) QH301-705.5
spellingShingle	Biology (General) QH301-705.5 Alvaro Sanchez Jeff Gore feedback between population and evolutionary dynamics determines the fate of social microbial populations.
description	The evolutionary spread of cheater strategies can destabilize populations engaging in social cooperative behaviors, thus demonstrating that evolutionary changes can have profound implications for population dynamics. At the same time, the relative fitness of cooperative traits often depends upon population density, thus leading to the potential for bi-directional coupling between population density and the evolution of a cooperative trait. Despite the potential importance of these eco-evolutionary feedback loops in social species, they have not yet been demonstrated experimentally and their ecological implications are poorly understood. Here, we demonstrate the presence of a strong feedback loop between population dynamics and the evolutionary dynamics of a social microbial gene, SUC2, in laboratory yeast populations whose cooperative growth is mediated by the SUC2 gene. We directly visualize eco-evolutionary trajectories of hundreds of populations over 50-100 generations, allowing us to characterize the phase space describing the interplay of evolution and ecology in this system. Small populations collapse despite continual evolution towards increased cooperative allele frequencies; large populations with a sufficient number of cooperators "spiral" to a stable state of coexistence between cooperator and cheater strategies. The presence of cheaters does not significantly affect the equilibrium population density, but it does reduce the resilience of the population as well as its ability to adapt to a rapidly deteriorating environment. Our results demonstrate the potential ecological importance of coupling between evolutionary dynamics and the population dynamics of cooperatively growing organisms, particularly in microbes. Our study suggests that this interaction may need to be considered in order to explain intraspecific variability in cooperative behaviors, and also that this feedback between evolution and ecology can critically affect the demographic fate of those species that rely on cooperation for their survival.
format	article
author	Alvaro Sanchez Jeff Gore
author_facet	Alvaro Sanchez Jeff Gore
author_sort	Alvaro Sanchez
title	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
title_short	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
title_full	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
title_fullStr	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
title_full_unstemmed	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
title_sort	feedback between population and evolutionary dynamics determines the fate of social microbial populations.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/0cd4d7b1dbcb4607a2aea4a311183e3e
work_keys_str_mv	AT alvarosanchez feedbackbetweenpopulationandevolutionarydynamicsdeterminesthefateofsocialmicrobialpopulations AT jeffgore feedbackbetweenpopulationandevolutionarydynamicsdeterminesthefateofsocialmicrobialpopulations
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feedback between population and evolutionary dynamics determines the fate of social microbial populations.

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