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Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs
Ecological and evolutionary dynamics are intrinsically entwined. On short timescales, ecological interactions determine the fate and impact of new mutants, while on longer timescales evolution shapes the entire community. Here, we study the evolution of large numbers of closely related strains with...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
eLife Sciences Publications, Ltd
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306370/ https://www.ncbi.nlm.nih.gov/pubmed/37114771 http://dx.doi.org/10.7554/eLife.82734 |
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author | Mahadevan, Aditya Pearce, Michael T Fisher, Daniel S |
author_facet | Mahadevan, Aditya Pearce, Michael T Fisher, Daniel S |
author_sort | Mahadevan, Aditya |
collection | PubMed |
description | Ecological and evolutionary dynamics are intrinsically entwined. On short timescales, ecological interactions determine the fate and impact of new mutants, while on longer timescales evolution shapes the entire community. Here, we study the evolution of large numbers of closely related strains with generalized Lotka Volterra interactions but no niche structure. Host-pathogen-like interactions drive the community into a spatiotemporally chaotic state characterized by continual, spatially-local, blooms and busts. Upon the slow serial introduction of new strains, the community diversifies indefinitely, accommodating an arbitrarily large number of strains in spite of the absence of stabilizing niche interactions. The diversifying phase persists — albeit with gradually slowing diversification — in the presence of general, nonspecific, fitness differences between strains, which break the assumption of tradeoffs inherent in much previous work. Building on a dynamical-mean field-theory analysis of the ecological dynamics, an approximate effective model captures the evolution of the diversity and distributions of key properties. This work establishes a potential scenario for understanding how the interplay between evolution and ecology — in particular coevolution of a bacterial and a generalist phage species — could give rise to the extensive fine-scale diversity that is ubiquitous in the microbial world. |
format | Online Article Text |
id | pubmed-10306370 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | eLife Sciences Publications, Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-103063702023-06-29 Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs Mahadevan, Aditya Pearce, Michael T Fisher, Daniel S eLife Ecology Ecological and evolutionary dynamics are intrinsically entwined. On short timescales, ecological interactions determine the fate and impact of new mutants, while on longer timescales evolution shapes the entire community. Here, we study the evolution of large numbers of closely related strains with generalized Lotka Volterra interactions but no niche structure. Host-pathogen-like interactions drive the community into a spatiotemporally chaotic state characterized by continual, spatially-local, blooms and busts. Upon the slow serial introduction of new strains, the community diversifies indefinitely, accommodating an arbitrarily large number of strains in spite of the absence of stabilizing niche interactions. The diversifying phase persists — albeit with gradually slowing diversification — in the presence of general, nonspecific, fitness differences between strains, which break the assumption of tradeoffs inherent in much previous work. Building on a dynamical-mean field-theory analysis of the ecological dynamics, an approximate effective model captures the evolution of the diversity and distributions of key properties. This work establishes a potential scenario for understanding how the interplay between evolution and ecology — in particular coevolution of a bacterial and a generalist phage species — could give rise to the extensive fine-scale diversity that is ubiquitous in the microbial world. eLife Sciences Publications, Ltd 2023-04-28 /pmc/articles/PMC10306370/ /pubmed/37114771 http://dx.doi.org/10.7554/eLife.82734 Text en © 2023, Mahadevan, Pearce et al https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
spellingShingle | Ecology Mahadevan, Aditya Pearce, Michael T Fisher, Daniel S Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title | Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title_full | Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title_fullStr | Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title_full_unstemmed | Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title_short | Spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
title_sort | spatiotemporal ecological chaos enables gradual evolutionary diversification without niches or tradeoffs |
topic | Ecology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306370/ https://www.ncbi.nlm.nih.gov/pubmed/37114771 http://dx.doi.org/10.7554/eLife.82734 |
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