Evolutionary Biology of Transient Unstable Populations
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Sprache:Englisch
Fr. 137.00
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Beschreibung
Produktdetails
Einband
Taschenbuch
Erscheinungsdatum
13.12.2011
Herausgeber
Antonio FontdevilaVerlag
Springer BerlinSeitenzahl
293
Maße (L/B/H)
24.2/17/1.7 cm
Gewicht
531 g
Auflage
Softcover reprint of the original 1st ed. 1989
Sprache
Englisch
ISBN
978-3-642-74527-0
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.
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