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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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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 17 January 2022

Fluctuating Selection and Dynamic Adaptive Landscapes

Fluctuating Selection and Dynamic Adaptive Landscapes

(p.89) Chapter 7 Fluctuating Selection and Dynamic Adaptive Landscapes
The Adaptive Landscape in Evolutionary Biology

Ryan Calsbeek

Thomas P. Gosden

Shawn R. Kuchta

Erik I. Svensson

Oxford University Press

One of the central assumptions in Wright's original conception of the adaptive landscape, was that fitness remained constant through time. Decades of study have since shown that this assumption is invalid. This chapter explores how spatial and temporal variability in selection lead to dynamic shifts in adaptive landscapes. After considering a number of empirical examples of variable selection, it concludes that traits that are particularly important in biotic interactions are more likely to result in shifting landscapes. As such the chapter considers the various roles of frequency- and density dependence, sexual selection, predation, competition, phenotypic plasticity, and genetic polymorphism in affecting the strength and forms of selection. The review here supports a view of adaptive landscapes as highly dynamic and fluctuating.

Keywords:   climate, Darwin's finches, fluctuating selection, insects, lizards

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