THE LANGUAGE OF SPECIATION

@article{Harrison2012THELO,
  title={THE LANGUAGE OF SPECIATION},
  author={Richard G. Harrison},
  journal={Evolution},
  year={2012},
  volume={66}
}
The literature on speciation has expanded dramatically in recent years, catalyzed by the emergence of new conceptual frameworks, new theoretical approaches, and new methods for characterizing pattern and inferring process. As a consequence, the language used to describe the speciation process has become more complex. Increasing complexity may be an accurate reflection of current thinking with respect to how phenotypic differences limit gene flow, how selection results in the evolution of… 

The language of isolation: a commentary on Westram et al., 2022

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    Journal of evolutionary biology
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On the relative ease of speciation with periodic gene flow

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  • Biology
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  • 2014
A new “rate test of speciation” is developed that estimates the likelihood of non‐allopatric speciation given the distribution of RI rates in allopatry versus sympatry, and shows how using RI measures can greatly inform us about the geographical mode of Speciation in nature.

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The Commentaries assembled here suggest that any new paradigm recognising the near ubiquitous occurrence of hybridisation in animal and plant speciation is widely accepted, however, opinions vary much more widely as to its impact and potential role in the process of speciation.

Divergence with gene flow across a speciation continuum of Heliconius butterflies

Comparisons of hybridizing pairs of divergently colored races and incipient species reveal that genomic divergence increases with ecological and reproductive isolation, not only across the locus responsible for adaptive variation in red wing coloration, but also at genomic regions unlinked to color pattern.
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References

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This work describes the Bateson-Dobzhansky-Muller (BDM) model of speciation that does not require overcoming selection and describes exactly how the probability of speciation, the average waiting time to speciation, and the average duration of Speciation depend on the mutation and migration rates, population size, and selection for local adaptation.

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It is argued that natural selection is a ubiquitous part of speciation, and given the many ways in which stochastic and deterministic factors may interact during divergence, it is questioned whether the ecological speciation concept is useful.

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