Climate shapes the geographic distribution and introgressive spread of color ornamentation in common wall lizards
Miñano, Maravillas Ruiz LU ; While, Geoffrey M. LU ; Yang, Weizhao LU ; Burridg, Christopher P. ; Sacchi, Roberto ; Zuffi, Marco ; Scali, Stefano ; Salvi, Daniele LU
and Uller, Tobias
LU
(2021)
In American Naturalist
198(3).
p.379-393
- Abstract
Climate can exert an effect on the strength of sexual selection, but empirical evidence is limited. Here, we tested whether climate predicts the geographic distribution and introgressive spread of sexually selected male color ornamentation across 114 populations of the common wall lizard, Podarcis muralis. Coloration was highly structured across the landscape and did not reflect genetic differentiation. Instead, color ornamentation was consistently exaggerated in hot and dry environments, suggesting that climate-driven selection maintains geographic variation in spite of gene flow. Introgression of color ornamentation into a distantly related lineage appears to be ongoing and was particularly pronounced in warm climates with wet winters... (More)
Climate can exert an effect on the strength of sexual selection, but empirical evidence is limited. Here, we tested whether climate predicts the geographic distribution and introgressive spread of sexually selected male color ornamentation across 114 populations of the common wall lizard, Podarcis muralis. Coloration was highly structured across the landscape and did not reflect genetic differentiation. Instead, color ornamentation was consistently exaggerated in hot and dry environments, suggesting that climate-driven selection maintains geographic variation in spite of gene flow. Introgression of color ornamentation into a distantly related lineage appears to be ongoing and was particularly pronounced in warm climates with wet winters and dry summers. Combined, these results suggest that sexual ornamentation is consistently favored in climates that allow a prolonged reproductive season and high and reliable opportunities for lizard activity. This pattern corroborates theoretical predictions that such climatic conditions reduce the temporal clustering of receptive females and increase male-male competition, resulting in strong sexual selection. In summary, we provide compelling evidence for the importance of climate for the evolution of color ornamentation, and we demonstrate that geographic variation in the strength of sexual selection influences introgression of this phenotype.
(Less)
- author
- Miñano, Maravillas Ruiz
LU
; While, Geoffrey M.
LU
; Yang, Weizhao
LU
; Burridg, Christopher P.
; Sacchi, Roberto
; Zuffi, Marco
; Scali, Stefano
; Salvi, Daniele
LU
and Uller, Tobias
LU
- organization
- publishing date
- 2021-09
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Coloration, Geographic variation, Introgression, Lizard, Sexual selection
- in
- American Naturalist
- volume
- 198
- issue
- 3
- pages
- 15 pages
- publisher
- University of Chicago Press
- external identifiers
-
- pmid:34403317
- scopus:85114055963
- ISSN
- 0003-0147
- DOI
- 10.1086/715186
- language
- English
- LU publication?
- yes
- id
- d4c27edd-ed3d-4b6d-b42e-96f392e3de63
- date added to LUP
- 2022-02-04 15:59:11
- date last changed
- 2024-11-08 08:55:42
@article{d4c27edd-ed3d-4b6d-b42e-96f392e3de63,
abstract = {{<p>Climate can exert an effect on the strength of sexual selection, but empirical evidence is limited. Here, we tested whether climate predicts the geographic distribution and introgressive spread of sexually selected male color ornamentation across 114 populations of the common wall lizard, Podarcis muralis. Coloration was highly structured across the landscape and did not reflect genetic differentiation. Instead, color ornamentation was consistently exaggerated in hot and dry environments, suggesting that climate-driven selection maintains geographic variation in spite of gene flow. Introgression of color ornamentation into a distantly related lineage appears to be ongoing and was particularly pronounced in warm climates with wet winters and dry summers. Combined, these results suggest that sexual ornamentation is consistently favored in climates that allow a prolonged reproductive season and high and reliable opportunities for lizard activity. This pattern corroborates theoretical predictions that such climatic conditions reduce the temporal clustering of receptive females and increase male-male competition, resulting in strong sexual selection. In summary, we provide compelling evidence for the importance of climate for the evolution of color ornamentation, and we demonstrate that geographic variation in the strength of sexual selection influences introgression of this phenotype.</p>}},
author = {{Miñano, Maravillas Ruiz and While, Geoffrey M. and Yang, Weizhao and Burridg, Christopher P. and Sacchi, Roberto and Zuffi, Marco and Scali, Stefano and Salvi, Daniele and Uller, Tobias}},
issn = {{0003-0147}},
keywords = {{Coloration; Geographic variation; Introgression; Lizard; Sexual selection}},
language = {{eng}},
number = {{3}},
pages = {{379--393}},
publisher = {{University of Chicago Press}},
series = {{American Naturalist}},
title = {{Climate shapes the geographic distribution and introgressive spread of color ornamentation in common wall lizards}},
url = {{http://dx.doi.org/10.1086/715186}},
doi = {{10.1086/715186}},
volume = {{198}},
year = {{2021}},
}