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Speciation

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/9780198569725.003.0013
Subject:
Biology, Evolutionary Biology / Genetics

Diversification occurs readily in asexual populations, but is obstructed by recombination in outcrossed sexual organisms. Species may arise because sexual isolation permits diversification, or ... More


Yellowstone's Destabilized Ecosystem: Elk Effects, Science, and Policy Conflict

Published in print:
2006
Published Online:
September 2007
ISBN:
9780195148213
eISBN:
9780199790449
Item type:
book
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780195148213.001.0001
Subject:
Biology, Ecology

Historical accounts, park records, and biologists' observations indicated that wintering elk in Yellowstone's northern range were present in low numbers prior to and at park establishment in 1872; ... More


Life in the small-bodied cavity-nester guild: Demography of sympatric mountain and black-capped chickadees within nest web communities under changing habitat conditions

Kathy Martin and Andrea R. Norris

in Ecology and Behavior of Chickadees and Titmice: an integrated approach

Published in print:
2007
Published Online:
September 2007
ISBN:
9780198569992
eISBN:
9780191717802
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198569992.003.0009
Subject:
Biology, Ornithology

This chapter discusses the role and ecology of two chickadee species as members of the small-bodied cavity-nester guild and their general relationships in the nest web community. The ecological and ... More


Evolution of reproductive isolation

Anne E. Magurran

in Evolutionary Ecology: The Trinidadian Guppy

Published in print:
2005
Published Online:
September 2007
ISBN:
9780198527855
eISBN:
9780191713576
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198527855.003.0006
Subject:
Biology, Evolutionary Biology / Genetics

The previous chapters testify to rapid population differentiation as a result of selection. Certain populations have also been geographically isolated for extremely long periods of time. Guppy ... More


Evolution in Space

Michael Heads

in Molecular Panbiogeography of the Tropics

Published in print:
2012
Published Online:
September 2012
ISBN:
9780520271968
eISBN:
9780520951808
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520271968.003.0001
Subject:
Biology, Evolutionary Biology / Genetics

The main processes in biogeography are phylogenetic differentiation by vicariance, range expansion by normal ecological dispersal, and, in some cases, sympatric differentiation. Chance dispersal and ... More


Sympatric Speciation: Norm or Exception?

Douglas J. Futuyma

in Specialization, Speciation, and Radiation: The Evolutionary Biology of Herbivorous Insects

Published in print:
2008
Published Online:
March 2012
ISBN:
9780520251328
eISBN:
9780520933828
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520251328.003.0010
Subject:
Biology, Evolutionary Biology / Genetics

Host-specific herbivorous insects have inspired speculation about sympatric speciation at least since the 1860s, when the now-famous host races of the apple maggot were described for the first time. ... More


Sequential Radiation through Host-Race Formation: Herbivore Diversity Leads to Diversity in Natural Enemies

Warren G. Abrahamson and Catherine P. Blair

in Specialization, Speciation, and Radiation: The Evolutionary Biology of Herbivorous Insects

Published in print:
2008
Published Online:
March 2012
ISBN:
9780520251328
eISBN:
9780520933828
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520251328.003.0014
Subject:
Biology, Evolutionary Biology / Genetics

Sympatric speciation through formation of host races may present a situation where specialization and resultant diversification in one species cause diversification in another. Studies involving a ... More


Host Shifts, the Evolution of Communication, and Speciation in the Enchenopa binotata Species Complex of Treehoppers

Reginald B. Cocroft, Rafael L RodrÍGuez, and Randy E. Hunt

in Specialization, Speciation, and Radiation: The Evolutionary Biology of Herbivorous Insects

Published in print:
2008
Published Online:
March 2012
ISBN:
9780520251328
eISBN:
9780520933828
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520251328.003.0007
Subject:
Biology, Evolutionary Biology / Genetics

This chapter examines the role of communication systems in the diversification of the Enchenopa binotata species complex of treehoppers. It first discusses the role of ecological factors in promoting ... More


Host Fruit-Odor Discrimination and Sympatric Host-Race Formation

Jeffrey L. Feder and Andrew A. Forbes

in Specialization, Speciation, and Radiation: The Evolutionary Biology of Herbivorous Insects

Published in print:
2008
Published Online:
March 2012
ISBN:
9780520251328
eISBN:
9780520933828
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520251328.003.0008
Subject:
Biology, Evolutionary Biology / Genetics

This chapter examines host-fruit-odor discrimination in the apple maggot fly, Rhagoletis pomonella, and its role in sympatric speciation via host-plant shifting. It shows that R. pomonella flies both ... More


Speciation

David W. Pfennig and Karin S. Pfennig

in Evolution's Wedge: Competition and the Origins of Diversity

Published in print:
2012
Published Online:
May 2013
ISBN:
9780520274181
eISBN:
9780520954045
Item type:
chapter
Publisher:
University of California Press
DOI:
10.1525/california/9780520274181.003.0008
Subject:
Biology, Biodiversity / Conservation Biology

New species form during an extended process, which often begins when populations become physically separated and ends when they come into secondary contact and possess or subsequently evolve barriers ... More


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