By Patrik Nosil

ISBN-10: 0199587108

ISBN-13: 9780199587100

The beginning of organic variety, through the formation of recent species, might be inextricably associated with version to the ecological setting. particularly, ecological tactics are vital to the formation of recent species while boundaries to gene circulate (reproductive isolation) evolve among populations because of ecologically-based divergent usual choice. This means of 'ecological speciation' has noticeable a wide physique of really concentrated study within the final 10-15 years, and a evaluate and synthesis of the theoretical and empirical literature is now timely.

The ebook starts off by means of clarifying what ecological speciation is, its choices, and the predictions that may be used to check for it. It then stories the 3 elements of ecological speciation and discusses the geography and genomic foundation of the method. a last bankruptcy highlights destiny examine instructions, describing the methods and experiments that can be used to behavior that destiny paintings. The ecological and genetic literature is built-in in the course of the textual content with the objective of laying off new perception into the speciation method, really whilst the empirical info is then extra built-in with concept.

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Extra info for Ecological Speciation

Example text

Diff|culties with tests of parallel speciation At least three major limitations for demonstrating parallel speciation exist (Fig. 6). First, multiple, independent origins of ecological divergence will not always exist, thereby precluding tests of parallel speciation. Second, gene flow between ecologically divergent forms could obscure historical relationships among population pairs such that a true single origin of each ecological form is mistaken for multiple origins (or in less extreme scenarios, ecologically divergent forms appear more closely related than they truly are).

No. studies 1) No gene flow direct 2) No gene flow indirect 3) Gene flow direct 4) Gene flow indirect 7 5 1 7 2 8 1 1 3 21 1 3 No. divergently selected traits 1 1 1 1 1 1 4 2 4 1 1 1 Result Mixed RI Partial RI Strong RI No RI Mixed RI Partial RI No RI Partial RI Strong RI No RI Mixed RI Partial RI “RI” refers to sexual reproductive isolation in all cases. “No RI” refers to significant RI never observed. “Mixed RI” refers to cases in which partial RI was detected in some cases, but RI varied among years, replicates, and strains, such that RI was sometimes lacking.

B) The probability of interbreeding between versus within ecomorphs, for ecomorphs from the same versus different lakes. Modified from Rundle et al. (2000) with permission of the American Society for the Advancement of Science. 30  Ecological Speciation of benthics from different lakes (Taylor and McPhail 2000). , premating isolation is weak between limnetic forms from different lakes). 4 for details). Some cases of parallel speciation involve sympatric or parapatric divergence (Quesada et al. 2007, Conde-Padin et al.

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Ecological Speciation by Patrik Nosil

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