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Rapid evolution of prezygotic barriers in non-territorial damselflies

Sanchez Guillen, Rosa LU ; Cordoba-Aguilar, Alex; Cordero-Rivera, Adolfo and Wellenreuther, Maren LU (2014) In Biological Journal of the Linnean Society 113(2). p.485-496
Abstract
A central question in evolutionary biology concerns the accumulation of reproductive barriers during speciation. However, separating the reproductive barriers that have led to speciation from those that have secondarily accumulated (i.e. after initial divergence) is a widely recognized problem. Ideal candidate species for overcoming this problem are young species, where time for additional barriers to accrue has been limited. In the present study, we add to previous studies investigating the strength of reproductive barriers between the parapatric damselflies Ischnura elegans and Ischnura graellsii by quantifying seven prezygotic barriers between the allopatric pairs of I.elegans and Ischnura genei, as well as I.graellsii and I.genei.... (More)
A central question in evolutionary biology concerns the accumulation of reproductive barriers during speciation. However, separating the reproductive barriers that have led to speciation from those that have secondarily accumulated (i.e. after initial divergence) is a widely recognized problem. Ideal candidate species for overcoming this problem are young species, where time for additional barriers to accrue has been limited. In the present study, we add to previous studies investigating the strength of reproductive barriers between the parapatric damselflies Ischnura elegans and Ischnura graellsii by quantifying seven prezygotic barriers between the allopatric pairs of I.elegans and Ischnura genei, as well as I.graellsii and I.genei. Specifically, we measured four premating (temporal, sexual, mechanical (I), and mechanical (II)) and three postmating (oviposition success, fecundity, and fertility) barriers using experimental approaches and, for first time, we investigated the mechanisms causing mechanical isolation, which is the strongest reproductive barrier in ischnurans. The findings of the present study support the notion that premating barriers are generally strong and contribute significantly to total reproductive isolation in young lineages (65-98%), although they never solely lead to complete isolation. Asymmetry was generally stronger in premating than in postmating barriers, and was driven mostly through asymmetry in mechanical isolation, which is caused by morphological divergence of secondary sexual appendages. We found that barriers act multiplicatively in all species combinations tested, with the exception of sexual isolation, which was not detected. Our results are consistent with a recent allopatric speciation scenario driven by differences in male anal appendages, either impeding copulation or affecting female preferences. Taken together, the results from this and previous studies in diverse odonate genera suggest that premating barriers have evolved rapidly in ischnuran damselflies and, although reproductive isolation in ischnurans is more commonly the result of several barriers acting together, morphological divergence of secondary sexual appendages appears to be a common factor facilitating premating isolation in this group.(c) 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 113, 485-496. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
asymmetric reproductive isolation, odonata, prezygotic isolation, speciation
in
Biological Journal of the Linnean Society
volume
113
issue
2
pages
485 - 496
publisher
Linnean Society of London
external identifiers
  • wos:000342613900011
  • scopus:84925194567
ISSN
0024-4066
DOI
10.1111/bij.12347
language
English
LU publication?
yes
id
91eb8357-d14b-42ff-a597-316f59078144 (old id 4803404)
date added to LUP
2014-12-01 09:07:39
date last changed
2017-10-22 03:25:47
@article{91eb8357-d14b-42ff-a597-316f59078144,
  abstract     = {A central question in evolutionary biology concerns the accumulation of reproductive barriers during speciation. However, separating the reproductive barriers that have led to speciation from those that have secondarily accumulated (i.e. after initial divergence) is a widely recognized problem. Ideal candidate species for overcoming this problem are young species, where time for additional barriers to accrue has been limited. In the present study, we add to previous studies investigating the strength of reproductive barriers between the parapatric damselflies Ischnura elegans and Ischnura graellsii by quantifying seven prezygotic barriers between the allopatric pairs of I.elegans and Ischnura genei, as well as I.graellsii and I.genei. Specifically, we measured four premating (temporal, sexual, mechanical (I), and mechanical (II)) and three postmating (oviposition success, fecundity, and fertility) barriers using experimental approaches and, for first time, we investigated the mechanisms causing mechanical isolation, which is the strongest reproductive barrier in ischnurans. The findings of the present study support the notion that premating barriers are generally strong and contribute significantly to total reproductive isolation in young lineages (65-98%), although they never solely lead to complete isolation. Asymmetry was generally stronger in premating than in postmating barriers, and was driven mostly through asymmetry in mechanical isolation, which is caused by morphological divergence of secondary sexual appendages. We found that barriers act multiplicatively in all species combinations tested, with the exception of sexual isolation, which was not detected. Our results are consistent with a recent allopatric speciation scenario driven by differences in male anal appendages, either impeding copulation or affecting female preferences. Taken together, the results from this and previous studies in diverse odonate genera suggest that premating barriers have evolved rapidly in ischnuran damselflies and, although reproductive isolation in ischnurans is more commonly the result of several barriers acting together, morphological divergence of secondary sexual appendages appears to be a common factor facilitating premating isolation in this group.(c) 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 113, 485-496.},
  author       = {Sanchez Guillen, Rosa and Cordoba-Aguilar, Alex and Cordero-Rivera, Adolfo and Wellenreuther, Maren},
  issn         = {0024-4066},
  keyword      = {asymmetric reproductive isolation,odonata,prezygotic isolation,speciation},
  language     = {eng},
  number       = {2},
  pages        = {485--496},
  publisher    = {Linnean Society of London},
  series       = {Biological Journal of the Linnean Society},
  title        = {Rapid evolution of prezygotic barriers in non-territorial damselflies},
  url          = {http://dx.doi.org/10.1111/bij.12347},
  volume       = {113},
  year         = {2014},
}