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Non-ecological speciation, niche conservatism and thermal adaptation: how are they connected?

Svensson, Erik LU (2012) In Organisms Diversity & Evolution 12(3). p.229-240
Abstract
During the last decade, the ecological theory of adaptive radiation, and its corollary "ecological speciation", has been a major research theme in evolutionary biology. Briefly, this theory states that speciation is mainly or largely the result of divergent selection, arising from niche differences between populations or incipient species. Reproductive isolation evolves either as a result of direct selection on mate preferences (e.g. reinforcement), or as a correlated response to divergent selection ("by-product speciation"). Although there are now many tentative examples of ecological speciation, I argue that ecology's role in speciation might have been overemphasised and that non-ecological and non-adaptive alternatives should be... (More)
During the last decade, the ecological theory of adaptive radiation, and its corollary "ecological speciation", has been a major research theme in evolutionary biology. Briefly, this theory states that speciation is mainly or largely the result of divergent selection, arising from niche differences between populations or incipient species. Reproductive isolation evolves either as a result of direct selection on mate preferences (e.g. reinforcement), or as a correlated response to divergent selection ("by-product speciation"). Although there are now many tentative examples of ecological speciation, I argue that ecology's role in speciation might have been overemphasised and that non-ecological and non-adaptive alternatives should be considered more seriously. Specifically, populations and species of many organisms often show strong evidence of niche conservatism, yet are often highly reproductively isolated from each other. This challenges niche-based ecological speciation and reveals partial decoupling between ecology and reproductive isolation. Furthermore, reproductive isolation might often evolve in allopatry before ecological differentiation between taxa or possibly through learning and antagonistic sexual interactions, either in allopatry or sympatry. Here I discuss recent theoretical and empirical work in this area, with some emphasis on odonates (dragonflies and damselflies) and suggest some future avenues of research. A main message from this paper is that the ecology of species differences is not the same as ecological speciation, just like the genetics of species differences does not equate to the genetics of speciation. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Mike May Festschrift, Calopteryx, Learning, Learned mate preferences, Niche, Sexual conflict, By-product speciation, IR-camera, Thermal, imaging, Ectotherms, Sexual isolation
in
Organisms Diversity & Evolution
volume
12
issue
3
pages
229 - 240
publisher
Springer
external identifiers
  • wos:000308662400003
  • scopus:84870543399
ISSN
1618-1077
DOI
10.1007/s13127-012-0082-6
project
BECC
language
English
LU publication?
yes
id
4a4b1e88-3282-48e6-8452-93d237a29c44 (old id 3139722)
date added to LUP
2012-11-26 11:13:29
date last changed
2017-11-12 03:14:57
@article{4a4b1e88-3282-48e6-8452-93d237a29c44,
  abstract     = {During the last decade, the ecological theory of adaptive radiation, and its corollary "ecological speciation", has been a major research theme in evolutionary biology. Briefly, this theory states that speciation is mainly or largely the result of divergent selection, arising from niche differences between populations or incipient species. Reproductive isolation evolves either as a result of direct selection on mate preferences (e.g. reinforcement), or as a correlated response to divergent selection ("by-product speciation"). Although there are now many tentative examples of ecological speciation, I argue that ecology's role in speciation might have been overemphasised and that non-ecological and non-adaptive alternatives should be considered more seriously. Specifically, populations and species of many organisms often show strong evidence of niche conservatism, yet are often highly reproductively isolated from each other. This challenges niche-based ecological speciation and reveals partial decoupling between ecology and reproductive isolation. Furthermore, reproductive isolation might often evolve in allopatry before ecological differentiation between taxa or possibly through learning and antagonistic sexual interactions, either in allopatry or sympatry. Here I discuss recent theoretical and empirical work in this area, with some emphasis on odonates (dragonflies and damselflies) and suggest some future avenues of research. A main message from this paper is that the ecology of species differences is not the same as ecological speciation, just like the genetics of species differences does not equate to the genetics of speciation.},
  author       = {Svensson, Erik},
  issn         = {1618-1077},
  keyword      = {Mike May Festschrift,Calopteryx,Learning,Learned mate preferences,Niche,Sexual conflict,By-product speciation,IR-camera,Thermal,imaging,Ectotherms,Sexual isolation},
  language     = {eng},
  number       = {3},
  pages        = {229--240},
  publisher    = {Springer},
  series       = {Organisms Diversity & Evolution},
  title        = {Non-ecological speciation, niche conservatism and thermal adaptation: how are they connected?},
  url          = {http://dx.doi.org/10.1007/s13127-012-0082-6},
  volume       = {12},
  year         = {2012},
}