Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland
Eco-evolutionary responses of natural populations to spatial environmental variation strongly depend on the relative strength of environmental differences/natural selection and dispersal/gene flow. In absence of geographic barriers, as often is the case in lake ecosystems, gene flow is expected to c...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3797472 http://www.ncbi.nlm.nih.gov/pubmed/24223263 https://doi.org/10.1002/ece3.712 |
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ftpubmed:oai:pubmedcentral.nih.gov:3797472 2023-05-15T16:47:59+02:00 Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland Millet, Antoine Kristjánsson, Bjarni K Einarsson, Árni Räsänen, Katja 2013-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3797472 http://www.ncbi.nlm.nih.gov/pubmed/24223263 https://doi.org/10.1002/ece3.712 en eng Blackwell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3797472 http://www.ncbi.nlm.nih.gov/pubmed/24223263 http://dx.doi.org/10.1002/ece3.712 © 2013 Published by John Wiley & Sons Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. CC-BY Original Research Text 2013 ftpubmed https://doi.org/10.1002/ece3.712 2013-11-17T01:29:16Z Eco-evolutionary responses of natural populations to spatial environmental variation strongly depend on the relative strength of environmental differences/natural selection and dispersal/gene flow. In absence of geographic barriers, as often is the case in lake ecosystems, gene flow is expected to constrain adaptive divergence between environments – favoring phenotypic plasticity or high trait variability. However, if divergent natural selection is sufficiently strong, adaptive divergence can occur in face of gene flow. The extent of divergence is most often studied between two contrasting environments, whereas potential for multimodal divergence is little explored. We investigated phenotypic (body size, defensive structures, and feeding morphology) and genetic (microsatellites) structure in threespine stickleback (Gasterosteus aculeatus) across five habitat types and two basins (North and South) within the geologically young and highly heterogeneous Lake Mývatn, North East Iceland. We found that (1) North basin stickleback were, on average, larger and had relatively longer spines than South basin stickleback, whereas (2) feeding morphology (gill raker number and gill raker gap width) differed among three of five habitat types, and (3) there was only subtle genetic differentiation across the lake. Overall, our results indicate predator and prey mediated phenotypic divergence across multiple habitats in the lake, in face of gene flow. Text Iceland Mývatn PubMed Central (PMC) Mývatn ENVELOPE(-16.985,-16.985,65.600,65.600) Ecology and Evolution n/a n/a |
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English |
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Original Research |
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Original Research Millet, Antoine Kristjánsson, Bjarni K Einarsson, Árni Räsänen, Katja Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
topic_facet |
Original Research |
description |
Eco-evolutionary responses of natural populations to spatial environmental variation strongly depend on the relative strength of environmental differences/natural selection and dispersal/gene flow. In absence of geographic barriers, as often is the case in lake ecosystems, gene flow is expected to constrain adaptive divergence between environments – favoring phenotypic plasticity or high trait variability. However, if divergent natural selection is sufficiently strong, adaptive divergence can occur in face of gene flow. The extent of divergence is most often studied between two contrasting environments, whereas potential for multimodal divergence is little explored. We investigated phenotypic (body size, defensive structures, and feeding morphology) and genetic (microsatellites) structure in threespine stickleback (Gasterosteus aculeatus) across five habitat types and two basins (North and South) within the geologically young and highly heterogeneous Lake Mývatn, North East Iceland. We found that (1) North basin stickleback were, on average, larger and had relatively longer spines than South basin stickleback, whereas (2) feeding morphology (gill raker number and gill raker gap width) differed among three of five habitat types, and (3) there was only subtle genetic differentiation across the lake. Overall, our results indicate predator and prey mediated phenotypic divergence across multiple habitats in the lake, in face of gene flow. |
format |
Text |
author |
Millet, Antoine Kristjánsson, Bjarni K Einarsson, Árni Räsänen, Katja |
author_facet |
Millet, Antoine Kristjánsson, Bjarni K Einarsson, Árni Räsänen, Katja |
author_sort |
Millet, Antoine |
title |
Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
title_short |
Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
title_full |
Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
title_fullStr |
Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
title_full_unstemmed |
Spatial phenotypic and genetic structure of threespine stickleback (Gasterosteus aculeatus) in a heterogeneous natural system, Lake Mývatn, Iceland |
title_sort |
spatial phenotypic and genetic structure of threespine stickleback (gasterosteus aculeatus) in a heterogeneous natural system, lake mývatn, iceland |
publisher |
Blackwell Publishing Ltd |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3797472 http://www.ncbi.nlm.nih.gov/pubmed/24223263 https://doi.org/10.1002/ece3.712 |
long_lat |
ENVELOPE(-16.985,-16.985,65.600,65.600) |
geographic |
Mývatn |
geographic_facet |
Mývatn |
genre |
Iceland Mývatn |
genre_facet |
Iceland Mývatn |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3797472 http://www.ncbi.nlm.nih.gov/pubmed/24223263 http://dx.doi.org/10.1002/ece3.712 |
op_rights |
© 2013 Published by John Wiley & Sons Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.712 |
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Ecology and Evolution |
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1766038088260255744 |