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The Biogeography of Adaptive Radiations and the Geographic Overlap of Sister Species

Pontarp, Mikael LU ; Ripa, Jörgen LU and Lundberg, Per LU (2015) In American Naturalist 186(5). p.565-581
Abstract
The biogeography of speciation and what can be learned about the past mode of speciation from current biogeography of sister species are recurrent problems in evolution. We used a trait- and individual-based, eco-evolutionary model to simulate adaptive radiations and recorded the geographical overlap of species during and after evolutionary branching (speciation). We compared the spatial overlap among sister species in the fully saturated community with the overlap at the speciation event. The mean geographic overlap at speciation varied continuously from complete (sympatry) to none (allopatry), depending on local and regional environmental heterogeneity and the rate of dispersal. The distribution of overlap was, however, in some cases... (More)
The biogeography of speciation and what can be learned about the past mode of speciation from current biogeography of sister species are recurrent problems in evolution. We used a trait- and individual-based, eco-evolutionary model to simulate adaptive radiations and recorded the geographical overlap of species during and after evolutionary branching (speciation). We compared the spatial overlap among sister species in the fully saturated community with the overlap at the speciation event. The mean geographic overlap at speciation varied continuously from complete (sympatry) to none (allopatry), depending on local and regional environmental heterogeneity and the rate of dispersal. The distribution of overlap was, however, in some cases considerably bimodal. This tendency was most expressed at large values of regional heterogeneity, corresponding to sharp environmental contrasts. The mean geographic overlap also varied during the course of a radiation, sometimes with a consistent negative trend over time. The speciations that resulted in currently observable end community sister species were therefore not an unbiased sample of all speciations throughout the radiation. Post-speciation range shifts (causing increased overlap) occurred most frequently when dispersal was high or when local habitat heterogeneity was low. Our results help us understand how the patterns of geographic mode of speciation emerge. We also show the difficulty in inferring the geographical speciation mode from phylogenies and the biogeography of extant species. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
individual-based modeling, metacommunity, radiation, adaptive, speciation, evolutionary dynamics, ecological interactions
in
American Naturalist
volume
186
issue
5
pages
565 - 581
publisher
University of Chicago Press
external identifiers
  • wos:000363928900004
  • scopus:84945407311
ISSN
0003-0147
DOI
10.1086/683260
language
English
LU publication?
yes
id
7cd3bee2-035f-4a87-9cbc-ded42572caee (old id 8389379)
date added to LUP
2015-12-22 08:06:10
date last changed
2017-05-30 13:28:41
@article{7cd3bee2-035f-4a87-9cbc-ded42572caee,
  abstract     = {The biogeography of speciation and what can be learned about the past mode of speciation from current biogeography of sister species are recurrent problems in evolution. We used a trait- and individual-based, eco-evolutionary model to simulate adaptive radiations and recorded the geographical overlap of species during and after evolutionary branching (speciation). We compared the spatial overlap among sister species in the fully saturated community with the overlap at the speciation event. The mean geographic overlap at speciation varied continuously from complete (sympatry) to none (allopatry), depending on local and regional environmental heterogeneity and the rate of dispersal. The distribution of overlap was, however, in some cases considerably bimodal. This tendency was most expressed at large values of regional heterogeneity, corresponding to sharp environmental contrasts. The mean geographic overlap also varied during the course of a radiation, sometimes with a consistent negative trend over time. The speciations that resulted in currently observable end community sister species were therefore not an unbiased sample of all speciations throughout the radiation. Post-speciation range shifts (causing increased overlap) occurred most frequently when dispersal was high or when local habitat heterogeneity was low. Our results help us understand how the patterns of geographic mode of speciation emerge. We also show the difficulty in inferring the geographical speciation mode from phylogenies and the biogeography of extant species.},
  author       = {Pontarp, Mikael and Ripa, Jörgen and Lundberg, Per},
  issn         = {0003-0147},
  keyword      = {individual-based modeling,metacommunity,radiation,adaptive,speciation,evolutionary dynamics,ecological interactions},
  language     = {eng},
  number       = {5},
  pages        = {565--581},
  publisher    = {University of Chicago Press},
  series       = {American Naturalist},
  title        = {The Biogeography of Adaptive Radiations and the Geographic Overlap of Sister Species},
  url          = {http://dx.doi.org/10.1086/683260},
  volume       = {186},
  year         = {2015},
}