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: | https://doi.org/10.1002/ece3.712 |
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fteawag:oai:dora:eawag_8971 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 https://doi.org/10.1002/ece3.712 eng eng Wiley Ecology and Evolution--Ecol. Evol.--journals:761--2045-7758-- eawag:8971 journal id: journals:761 issn: 2045-7758 e-issn: ut: 000324932600003 local: 16196 scopus: 2-s2.0-84887631310 doi:10.1002/ece3.712 uri: pmid: 24223263 defense traits feeding morphology genetic divergence microsatellite phenotypic divergence Text Journal Article 2013 fteawag https://doi.org/10.1002/ece3.712 2023-04-09T04:46:59Z 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. Article in Journal/Newspaper Iceland Mývatn DORA Eawag Mývatn ENVELOPE(-16.985,-16.985,65.600,65.600) Ecology and Evolution n/a n/a |
institution |
Open Polar |
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DORA Eawag |
op_collection_id |
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language |
English |
topic |
defense traits feeding morphology genetic divergence microsatellite phenotypic divergence |
spellingShingle |
defense traits feeding morphology genetic divergence microsatellite phenotypic divergence 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 |
defense traits feeding morphology genetic divergence microsatellite phenotypic divergence |
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 |
Article in Journal/Newspaper |
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 |
Wiley |
publishDate |
2013 |
url |
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 |
Ecology and Evolution--Ecol. Evol.--journals:761--2045-7758-- eawag:8971 journal id: journals:761 issn: 2045-7758 e-issn: ut: 000324932600003 local: 16196 scopus: 2-s2.0-84887631310 doi:10.1002/ece3.712 uri: pmid: 24223263 |
op_doi |
https://doi.org/10.1002/ece3.712 |
container_title |
Ecology and Evolution |
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n/a |
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n/a |
_version_ |
1766038084934172672 |