Experimental Evolution of Local Adaptation Under Unidimensional and Multidimensional Selection

2021 ◽  
Author(s):  
Nathan J. White ◽  
Andrew P. Beckerman ◽  
Rhonda R. Snook ◽  
Michael A. Brockhurst ◽  
Roger K. Butlin ◽  
...  
Keyword(s):  
Local Adaptation ◽  
Experimental Evolution

scholarly journals Local adaptation mediated niche expansion in correlation with genetic richness

2021 ◽  
Author(s):  
Masaomi Kurokawa ◽  
Issei Nishimura ◽  
Bei-Wen YING
Keyword(s):  
Escherichia Coli ◽  
Local Adaptation ◽  
High Throughput ◽  
Experimental Evolution ◽  
Environmental Gradient ◽  
Growth Curves ◽  
Quantitative Relationship ◽  
Central Issue ◽  
Wild Type ◽  
Niche Expansion

As a central issue in evolution and ecology, the quantitative relationship among the genome, adaptation and the niche was investigated. Local adaptation of five Escherichia coli strains carrying either the wild-type genome or reduced genomes was achieved by experimental evolution. A high-throughput fitness assay of the ancestor and evolved populations across an environmental gradient of eight niches resulted in a total of 80 fitness curves generated from 2,220 growth curves. Further analyses showed that the increases in both local adaptiveness and niche broadness were negatively correlated with genetic richness. Local adaptation caused common niche expansion, whereas niche expansion for generality or speciality was decided by genetic richness. The order of the mutations accumulated stepwise was correlated with the magnitude of the fitness increase attributed to mutation accumulation. Pre-adaptation probably participated in coordination among genetic richness, local adaptation and niche expansion.

Introduction: microbial local adaptation: insights from natural populations, genomics and experimental evolution

2017 ◽  
Vol 26 (7) ◽  
pp. 1703-1710 ◽  
Author(s):  
Tatiana Giraud ◽  
Britt Koskella ◽  
Anna-Liisa Laine
Keyword(s):  
Local Adaptation ◽  
Experimental Evolution ◽  
Natural Populations

scholarly journals Temporal patterns of local adaptation in soil pseudomonads

2016 ◽  
Vol 283 (1840) ◽  
pp. 20161652 ◽  
Author(s):  
Susanne A. Kraemer ◽  
Rees Kassen
Keyword(s):  
Local Adaptation ◽  
Future Study ◽  
Experimental Evolution ◽  
Ecological Niche ◽  
Time Shift ◽  
Microbial Adaptation ◽  
Microbial Ecosystems ◽  
Temporal Adaptation ◽  
Shift Analysis ◽  
Natural Isolates

Strong divergent selection leading to local adaptation is often invoked to explain the staggering diversity of bacteria in microbial ecosystems. However, examples of specialization by bacterial clones to alternative niches in nature are rare. Here, we investigate the extent of local adaptation in natural isolates of pseudomonads and their relatives to their soil environments across both space and time. Though most isolates grew well in most environments, patchily distributed low-quality environments were found to drive specialization. In contrast to experimental evolution work on microbial adaptation, temporal adaptation was stronger than spatial adaptation among the isolates and environments we sampled. Time-shift analysis of fitness across two seasons of growth revealed an unexpectedly strong effect of preadaptation. This pattern of apparent future adaptation may be caused by unknown abiotic properties of these environments, phages, bacterial competitors or general mechanisms of ecological niche release, and warrants future study.

scholarly journals The emergence of performance trade-offs during local adaptation: insights from experimental evolution

2017 ◽  
Vol 26 (7) ◽  
pp. 1720-1733 ◽  
Author(s):  
Lisa M. Bono ◽  
Leno B. Smith ◽  
David W. Pfennig ◽  
Christina L. Burch
Keyword(s):  
Local Adaptation ◽  
Experimental Evolution ◽  
Trade Offs

scholarly journals Local adaptation mediated niche expansion in correlation with genetic richness

2021 ◽  
Author(s):  
Masaomi Kurokawa ◽  
Issei Nishimura ◽  
Bei-Wen Ying
Keyword(s):  
Escherichia Coli ◽  
Local Adaptation ◽  
High Throughput ◽  
Experimental Evolution ◽  
Environmental Gradient ◽  
Growth Curves ◽  
Quantitative Relationship ◽  
Central Issue ◽  
Wild Type ◽  
Niche Expansion

Abstract As a central issue in evolution and ecology, the quantitative relationship among the genome, adaptation and the niche was investigated. Local adaptation of five Escherichia coli strains carrying either the wild-type genome or reduced genomes was achieved by experimental evolution. A high-throughput fitness assay of the ancestor and evolved populations across an environmental gradient of eight niches resulted in a total of 80 fitness curves generated from 2,220 growth curves. Further analyses showed that the increases in both local adaptiveness and niche broadness were negatively correlated with genetic richness. Local adaptation caused common niche expansion, whereas niche expansion for generality or speciality was decided by genetic richness. The order of the mutations accumulated stepwise was correlated with the magnitude of the fitness increase attributed to mutation accumulation. Pre-adaptation probably participated in coordination among genetic richness, local adaptation and niche expansion.

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