Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish
Abstract Interpreting patterns of population structure in nature is often challenging, especially in dynamic landscapes where population genetic connectivity evolves over time. In this study, we document the absence of migration‐drift equilibrium in a stream‐dwelling euryhaline fish resulting from p...
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crwiley:10.1111/j.1365-294x.2005.02500.x 2024-06-02T08:07:41+00:00 Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish POISSANT, JOCELYN KNIGHT, THOMAS W. FERGUSON, MOIRA M. 2005 http://dx.doi.org/10.1111/j.1365-294x.2005.02500.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2005.02500.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2005.02500.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 14, issue 5, page 1321-1331 ISSN 0962-1083 1365-294X journal-article 2005 crwiley https://doi.org/10.1111/j.1365-294x.2005.02500.x 2024-05-03T12:05:45Z Abstract Interpreting patterns of population structure in nature is often challenging, especially in dynamic landscapes where population genetic connectivity evolves over time. In this study, we document the absence of migration‐drift equilibrium in a stream‐dwelling euryhaline fish resulting from past fine‐scale drainage rearrangements and evaluate the relative contribution of past and current hydrological landscapes on observed population structure. Based on allelic variation at nine microsatellite loci, genetic relationships among 12 populations of brook charr, Salvelinus fontinalis , from Gros Morne National Park of Canada (GMNP, Newfoundland, Canada) did not reflect current stream hierarchical structure. In addition, we observed no correlation between population differentiation and contemporary landscape features (waterway distance and sums of altitudinal differences). Instead, population relationships were consistent with historical hydrological structure predicted a priori based on geomorphological and biogeographical evidences. Also, population differentiation was strongly correlated with inferred historical landscape features. Contemporary barriers have apparently preserved the signature of past genetic connectivity by constraining gene flow. Based on the relationships between population differentiation and current and past landscape features at various spatial scales, we suggest that brook charr genetic diversity in GMNP is mostly the result of small distance migrations at the time of colonization and subsequent differentiation through drift. This study highlights the potential of approaching landscapes from a combination of contemporary and historical perspectives when interpreting nonequilibrium population structures resulting from landscape rearrangement. Article in Journal/Newspaper Gros Morne National Park Newfoundland Wiley Online Library Canada Gros Morne National Park ENVELOPE(-57.531,-57.531,49.613,49.613) Gros Morne National Park of Canada ENVELOPE(-57.737,-57.737,49.689,49.689) Molecular Ecology 14 5 1321 1331 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Interpreting patterns of population structure in nature is often challenging, especially in dynamic landscapes where population genetic connectivity evolves over time. In this study, we document the absence of migration‐drift equilibrium in a stream‐dwelling euryhaline fish resulting from past fine‐scale drainage rearrangements and evaluate the relative contribution of past and current hydrological landscapes on observed population structure. Based on allelic variation at nine microsatellite loci, genetic relationships among 12 populations of brook charr, Salvelinus fontinalis , from Gros Morne National Park of Canada (GMNP, Newfoundland, Canada) did not reflect current stream hierarchical structure. In addition, we observed no correlation between population differentiation and contemporary landscape features (waterway distance and sums of altitudinal differences). Instead, population relationships were consistent with historical hydrological structure predicted a priori based on geomorphological and biogeographical evidences. Also, population differentiation was strongly correlated with inferred historical landscape features. Contemporary barriers have apparently preserved the signature of past genetic connectivity by constraining gene flow. Based on the relationships between population differentiation and current and past landscape features at various spatial scales, we suggest that brook charr genetic diversity in GMNP is mostly the result of small distance migrations at the time of colonization and subsequent differentiation through drift. This study highlights the potential of approaching landscapes from a combination of contemporary and historical perspectives when interpreting nonequilibrium population structures resulting from landscape rearrangement. |
format |
Article in Journal/Newspaper |
author |
POISSANT, JOCELYN KNIGHT, THOMAS W. FERGUSON, MOIRA M. |
spellingShingle |
POISSANT, JOCELYN KNIGHT, THOMAS W. FERGUSON, MOIRA M. Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
author_facet |
POISSANT, JOCELYN KNIGHT, THOMAS W. FERGUSON, MOIRA M. |
author_sort |
POISSANT, JOCELYN |
title |
Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
title_short |
Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
title_full |
Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
title_fullStr |
Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
title_full_unstemmed |
Nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
title_sort |
nonequilibrium conditions following landscape rearrangement: the relative contribution of past and current hydrological landscapes on the genetic structure of a stream‐dwelling fish |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2005.02500.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2005.02500.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2005.02500.x |
long_lat |
ENVELOPE(-57.531,-57.531,49.613,49.613) ENVELOPE(-57.737,-57.737,49.689,49.689) |
geographic |
Canada Gros Morne National Park Gros Morne National Park of Canada |
geographic_facet |
Canada Gros Morne National Park Gros Morne National Park of Canada |
genre |
Gros Morne National Park Newfoundland |
genre_facet |
Gros Morne National Park Newfoundland |
op_source |
Molecular Ecology volume 14, issue 5, page 1321-1331 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.2005.02500.x |
container_title |
Molecular Ecology |
container_volume |
14 |
container_issue |
5 |
container_start_page |
1321 |
op_container_end_page |
1331 |
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1800752800782614528 |