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Species and Speciation in the Fossil Record$
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Warren D. Allmon and Margaret M. Yacobucci

Print publication date: 2016

Print ISBN-13: 9780226377445

Published to Chicago Scholarship Online: May 2017

DOI: 10.7208/chicago/9780226377582.001.0001

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PRINTED FROM CHICAGO SCHOLARSHIP ONLINE (www.chicago.universitypressscholarship.com). (c) Copyright University of Chicago Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CHSO for personal use.date: 25 September 2021

The Impact of Invasive Species on Speciation: Lessons from the Fossil Record

The Impact of Invasive Species on Speciation: Lessons from the Fossil Record

(p.340) Chapter Twelve The Impact of Invasive Species on Speciation: Lessons from the Fossil Record
Species and Speciation in the Fossil Record

Alycia L. Stigall

University of Chicago Press

Among modern taxa, speciation by geographic isolation is more prevalent than biologically‐based isolation mechanisms, and studies of speciation style among modern species indicate that vicariant speciation has occurred much more frequently than speciation by dispersal in the development of the modern biota. Fewer analyses have tested the relative frequency of speciation styles in the fossil record directly, but these also found vicariance to be more widespread than dispersal speciation among Paleozoic marine benthos. The dramatic increase in human‐facilitated species invasions in recent decades has been documented to alter the evolutionary pathway of native species. Analyzing the evolutionary impacts of species invasions within the fossil record provides a framework for examining the impact of species introductions on evolutionary time scales. Both the Late Ordovician and Middle Devonian saw major invasions and suppression of speciation in benthic marine faunas. This seems to have occurred by depression of vicariance due to the ecological effects of invading species on native species.

Keywords:   Late Devonian mass extinction, Richmondian invasion, niche stability

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