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Adaptive radiation: diversity and specialization

Graham Bell

in Selection: The Mechanism of Evolution

Published in print:
2007
Published Online:
May 2008
ISBN:
9780198569725
eISBN:
9780191717741
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198569725.003.0008
Subject:
Biology, Evolutionary Biology / Genetics

Selection in complex and structured environments is likely to cause the divergence of differently adapted lines. This will lead to a diverse array of specialized types, or to one or a few broad ... More


A source of divergent selection

Patrik Nosil

in Ecological Speciation

Published in print:
2012
Published Online:
May 2015
ISBN:
9780199587100
eISBN:
9780191810107
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:osobl/9780199587100.003.0003
Subject:
Biology, Evolutionary Biology / Genetics

This chapter studies the three commonly recognized sources of divergent selection. These include the differences between environments, interactions between populations, and ecologically based sexual ... More


What is ecological speciation?

Patrik Nosil

in Ecological Speciation

Published in print:
2012
Published Online:
May 2015
ISBN:
9780199587100
eISBN:
9780191810107
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:osobl/9780199587100.003.0001
Subject:
Biology, Evolutionary Biology / Genetics

This chapter defines ecological speciation as the process by which barriers to gene flow evolve between populations as a result of ecologically based divergent selection between environments. It ... More


The speciation continuum: what factors affect how far speciation proceeds?

Patrik Nosil

in Ecological Speciation

Published in print:
2012
Published Online:
May 2015
ISBN:
9780199587100
eISBN:
9780191810107
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:osobl/9780199587100.003.0008
Subject:
Biology, Evolutionary Biology / Genetics

This chapter concentrates on the degree to which ecological speciation unfolds once it is initiated. Its central concept is that speciation is often an extended and continuous process. It details on ... More


Why are there species?: Arenas of recombination and selection

Timothy G. Barraclough

in The Evolutionary Biology of Species

Published in print:
2019
Published Online:
August 2019
ISBN:
9780198749745
eISBN:
9780191814020
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198749745.003.0004
Subject:
Biology, Evolutionary Biology / Genetics, Biodiversity / Conservation Biology

This chapter continues the discussion of evolutionary methods of species delimitation by exploring how multilocus methods can be used to delimit reproductively isolated groups, and how genetic and ... More


Speciation and extinction in the Greater Cape Floristic Region

Allan G. Ellis, G. Anthony Verboom, Timotheus van der Niet, Steven D. Johnson, and H. Peter Linder

in Fynbos: Ecology, Evolution, and Conservation of a Megadiverse Region

Published in print:
2014
Published Online:
October 2014
ISBN:
9780199679584
eISBN:
9780191791949
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199679584.003.0006
Subject:
Biology, Ecology

As diversity accumulation reflects the balance between speciation and extinction through time, the high biotic diversity of the Cape likely results from high speciation and/or low extinction rates. ... More


What causes speciation?

Timothy G. Barraclough

in The Evolutionary Biology of Species

Published in print:
2019
Published Online:
August 2019
ISBN:
9780198749745
eISBN:
9780191814020
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198749745.003.0005
Subject:
Biology, Evolutionary Biology / Genetics, Biodiversity / Conservation Biology

The balance of evidence from earlier chapters is largely consistent with the reality of species units. This chapter therefore moves on to investigate what causes new species to form. This process ... More


The geography of ecological speciation

Patrik Nosil

in Ecological Speciation

Published in print:
2012
Published Online:
May 2015
ISBN:
9780199587100
eISBN:
9780191810107
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:osobl/9780199587100.003.0006
Subject:
Biology, Evolutionary Biology / Genetics

This chapter focuses on the geographic component of ecological speciation. It begins by giving different definitions of the geography of speciation and then studies the effects of geography on the ... More


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