Habitat heterogeneities versus spatial type frequency variances as driving forces of dispersal evolution Journal Article

Author(s): Novak, Sebastian
Article Title: Habitat heterogeneities versus spatial type frequency variances as driving forces of dispersal evolution
Affiliation IST Austria
Abstract: Understanding the evolution of dispersal is essential for understanding and predicting the dynamics of natural populations. Two main factors are known to influence dispersal evolution: spatio-temporal variation in the environment and relatedness between individuals. However, the relation between these factors is still poorly understood, and they are usually treated separately. In this article, I present a theoretical framework that contains and connects effects of both environmental variation and relatedness, and reproduces and extends their known features. Spatial habitat variation selects for balanced dispersal strategies, whereby the population is kept at an ideal free distribution. Within this class of dispersal strategies, I explain how increased dispersal is promoted by perturbations to the dispersal type frequencies. An explicit formula shows the magnitude of the selective advantage of increased dispersal in terms of the spatial variability in the frequencies of the different dispersal strategies present. These variances are capable of capturing various sources of stochasticity and hence establish a common scale for their effects on the evolution of dispersal. The results furthermore indicate an alternative approach to identifying effects of relatedness on dispersal evolution.
Keywords: migration; Relatedness; Balanced dispersal; ideal free distribution; spatial variability
Journal Title: Ecology and Evolution
Volume: 4
Issue 24
ISSN: 2045-7758
Publisher: Wiley-Blackwell  
Date Published: 2014-11-27
Start Page: 4589
End Page: 4597
Copyright Statement: CC-BY
Sponsor: This work was funded by the European Research Council (ERC) grant no. 250152.
DOI: 10.1002/ece3.1289
Notes: I am deeply indebted to Nick Barton for his inexhaustible stream of ideas, improvements, and stimulating questions. Also, I am grateful to Troy Day for his critical revisions of an earlier version of the manuscript. Furthermore, I want to thank Jitka Polechová, Séverine Vuilleumier, Florence Débarre, Tiago Paixão, and numerous colleagues at IST Austria for countless discussions and suggestions, as well as two anonymous referees for their elaborate and constructive feedback.
Open access: yes (OA journal)
IST Austria Authors
  1. Sebastian Novak
    11 Novak
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