Evolutionary Biology of Transient Unstable Populations

  • Antonio Fontdevila

Table of contents

  1. Front Matter
    Pages I-XI
  2. Founder, Colonizing and Bottleneck Populations

  3. Evolutionary Mechanisms

  4. Back Matter
    Pages 291-293

About these proceedings

Introduction

An overview of speciation theory reveals an increasingly held view that many events leading to the origin of new species occur in transient, unstable populations. A transient, unstable population should be under­ stood as a fast episodic phase in a population subjected to genetic and environmental factors that tend to disrupt its cohesive, balanced genome architecure, thus enhancing its probability to produce a new species. Striking the core of Darwinian thought, some authors claim that these· processes may be non-adaptive. Among the environmental factors one may cite biotic (e.g. resource availability) and abiotic (e.g. temperature) stress conditions that break up the population stability producing random, unpredictable changes in population size, population trait distribution, breeding structure, inter- and/or intrapopulational hybridization, etc. Genetic factors consist of those events that induce rapid changes in genetic expression and/or that determine reproductive isolation, such as substitutions, insertions, deletions, duplications, transpositions, gross chromosomal rearrangements, recombination and, in general, any mechanism that changes the regulatory pattern of the organism or the balance of its meiotic system. Both kinds of factors are often intertwined in a complex net and may influence each other.

Keywords

biology development developmental biology ecology evolution evolutionary biology genetics population genetics the origin

Editors and affiliations

  • Antonio Fontdevila
    • 1
  1. 1.Departamento de Genética y MicrobiologíaUniversidad Autónoma de BarcelonaBellaterra (Barcelona)Spain

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-74525-6
  • Copyright Information Springer-Verlag Berlin Heidelberg 1989
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Springer Book Archive
  • Print ISBN 978-3-642-74527-0
  • Online ISBN 978-3-642-74525-6
  • About this book