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The Adaptive Landscape in Evolutionary Biology$
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Erik Svensson and Ryan Calsbeek

Print publication date: 2013

Print ISBN-13: 9780199595372

Published to Oxford Scholarship Online: December 2013

DOI: 10.1093/acprof:oso/9780199595372.001.0001

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Empirical Insights into Adaptive Landscapes from Bacterial Experimental Evolution

Empirical Insights into Adaptive Landscapes from Bacterial Experimental Evolution

(p.169) Chapter 11 Empirical Insights into Adaptive Landscapes from Bacterial Experimental Evolution
The Adaptive Landscape in Evolutionary Biology

Tim F. Coopera

Oxford University Press

The adaptive landscape has had a major role in shaping and motivating many experimental evolution studies. In return, these studies have made important contributions to our understanding of the nature of adaptive landscapes. The simplest findings come from studies that have examined the similarity of evolutionary outcomes from initially identical replicate populations. Comparison of resulting evolutionary trajectories has allowed experimenters to examine the repeatability of evolution, a reflection of the relative influence of chance and selection on the outcome of evolution. Other experiments have addressed the evolution of diversity within (usually) initially homogeneous populations — an outcome determined by the availability of distinct adaptive peaks and the existence of ecological conditions that allow the maintenance of subpopulations at different peaks. Experiments can be carefully designed and controlled to assess the effect of environment — e.g. spatial structure, resource complexity — on the likelihood that distinct peaks will be reached. This chapter discusses how bacterial experimental evolution studies can and have contributed to our understanding of the form of adaptive landscapes.

Keywords:   experimental evolution, compensatory mutation, adaptive landscape, adaptive trajectory, mutation network

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