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Divergent Ecological Adaptation in the Speciation Cycle.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Divergent Ecological Adaptation in the Speciation Cycle./
Author:	Anderson, Sean Arnold Scott.
Description:	1 online resource (203 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-05, Section: B.
Contained By:	Dissertations Abstracts International84-05B.
Subject:	Evolution & development. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29215756click for full text (PQDT)
ISBN:	9798834060598

Divergent Ecological Adaptation in the Speciation Cycle.
Anderson, Sean Arnold Scott.

Divergent Ecological Adaptation in the Speciation Cycle. - 1 online resource (203 pages)

Source: Dissertations Abstracts International, Volume: 84-05, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2022.

Includes bibliographical references

In this thesis I attempt to better understand the general role played by adaptive ecological divergence in the evolution of new species. For the past two decades, evolutionary ecologists have largely viewed diversification through the lens of ecological theory of adaptive radiation (ETAR), an intuitive and influential synthesis in which divergent natural selection is the ultimate engine of biodiversity. Evidence for the theory's main tenets has been reported in several detailed studies, leading many authors to suggest that adaptive radiation is a generally important mechanism in diversification. But much of this evidence is derived from the study of naturally occurring model systems that reside in conditions that may be especially favourable to rapid ecological divergence. Newly-discovered patterns of morphological and genetic diversity in non-model taxa, meanwhile, appear to contradict some expectations of this framework, calling into question whether the dynamics observed in model systems can in fact scale up to explain non-model diversity. It is thus unclear if our leading model of diversification applies in the complex ecological theatres in which diversity most typically arises. To address this problem, I design and deploy new statistical tools for studying divergence between speciating and recently speciated lineages (i.e. sister taxa). With these tools, I assess broader support for alternative hypotheses regarding two key processes in the diversification cycle: speciation and the evolution of coexistence between close relatives.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798834060598Subjects--Topical Terms:

3172418
Evolution & development.
Subjects--Index Terms:

Character displacementIndex Terms--Genre/Form:

542853
Electronic books.

Divergent Ecological Adaptation in the Speciation Cycle.
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500 $a Source: Dissertations Abstracts International, Volume: 84-05, Section: B.
500 $a Advisor: Weir, Jason T.
502 $a Thesis (Ph.D.)--University of Toronto (Canada), 2022.
504 $a Includes bibliographical references
520 $a In this thesis I attempt to better understand the general role played by adaptive ecological divergence in the evolution of new species. For the past two decades, evolutionary ecologists have largely viewed diversification through the lens of ecological theory of adaptive radiation (ETAR), an intuitive and influential synthesis in which divergent natural selection is the ultimate engine of biodiversity. Evidence for the theory's main tenets has been reported in several detailed studies, leading many authors to suggest that adaptive radiation is a generally important mechanism in diversification. But much of this evidence is derived from the study of naturally occurring model systems that reside in conditions that may be especially favourable to rapid ecological divergence. Newly-discovered patterns of morphological and genetic diversity in non-model taxa, meanwhile, appear to contradict some expectations of this framework, calling into question whether the dynamics observed in model systems can in fact scale up to explain non-model diversity. It is thus unclear if our leading model of diversification applies in the complex ecological theatres in which diversity most typically arises. To address this problem, I design and deploy new statistical tools for studying divergence between speciating and recently speciated lineages (i.e. sister taxa). With these tools, I assess broader support for alternative hypotheses regarding two key processes in the diversification cycle: speciation and the evolution of coexistence between close relatives.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Evolution & development. $3 3172418
650 4 $a Ecology. $3 516476
653 $a Character displacement
653 $a Ecomorphology
653 $a Speciation
653 $a Trait divergence
653 $a Trait evolution
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710 2 $a University of Toronto (Canada). $b Ecology and Evolutionary Biology. $3 3190014
773 0 $t Dissertations Abstracts International $g 84-05B.
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