Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding
Zostera marina (eelgrass) can be found in the North Atlantic on the coast of Europe and on the east and west coasts of North America. Over the last 30 years, this once robust species has been reduced to sparse patchy populations due to disease and anthropogenic effects. In order to better understand...
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Oxford University Press
2009
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fthighwire:oai:open-archive.highwire.org:jhered:esp103v1 2023-05-15T17:34:16+02:00 Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding Campanella, James J. Bologna, Paul A. Smalley, John V. Rosenzweig, Eric B. Smith, Stephanie M. 2009-12-03 06:19:54.0 text/html http://jhered.oxfordjournals.org/cgi/content/short/esp103v1 https://doi.org/10.1093/jhered/esp103 en eng Oxford University Press http://jhered.oxfordjournals.org/cgi/content/short/esp103v1 http://dx.doi.org/10.1093/jhered/esp103 Copyright (C) 2009, American Genetic Association Article TEXT 2009 fthighwire https://doi.org/10.1093/jhered/esp103 2013-05-28T10:24:21Z Zostera marina (eelgrass) can be found in the North Atlantic on the coast of Europe and on the east and west coasts of North America. Over the last 30 years, this once robust species has been reduced to sparse patchy populations due to disease and anthropogenic effects. In order to better understand the consequences of this devastation on the population genetics of the species, we have analyzed the population structure of western Atlantic Z. marina , employing microsatellite DNA polymorphisms. Although high fixation index values suggest moderate genetic differentiation among most of the Z. marina sites, population diversity was low. This lack of diversity was supported by a general dearth of observable heterozygotes in these sites; mean observed heterozygosity values (0.14–0.46) were lower than the mean expected heterozygosity values (0.57–0.81). Additionally, the mean F IS (coefficient of local inbreeding) values in these sites were positive, again indicating a surfeit of homozygotes. Allelic richness suggests that Chesapeake Bay has the greatest internal genetic diversity of the sites studied. Inbreeding seems prevalent in these American populations, suggesting possible reproductive fitness problems in the future. There is evidence of demographic bottlenecking and particularly low genetic diversity in Long Island. Northern Maine had the highest effective population size, suggesting a possible use in future restoration projects. Text North Atlantic HighWire Press (Stanford University) Long Island Journal of Heredity 101 1 61 70 |
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Article Campanella, James J. Bologna, Paul A. Smalley, John V. Rosenzweig, Eric B. Smith, Stephanie M. Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
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description |
Zostera marina (eelgrass) can be found in the North Atlantic on the coast of Europe and on the east and west coasts of North America. Over the last 30 years, this once robust species has been reduced to sparse patchy populations due to disease and anthropogenic effects. In order to better understand the consequences of this devastation on the population genetics of the species, we have analyzed the population structure of western Atlantic Z. marina , employing microsatellite DNA polymorphisms. Although high fixation index values suggest moderate genetic differentiation among most of the Z. marina sites, population diversity was low. This lack of diversity was supported by a general dearth of observable heterozygotes in these sites; mean observed heterozygosity values (0.14–0.46) were lower than the mean expected heterozygosity values (0.57–0.81). Additionally, the mean F IS (coefficient of local inbreeding) values in these sites were positive, again indicating a surfeit of homozygotes. Allelic richness suggests that Chesapeake Bay has the greatest internal genetic diversity of the sites studied. Inbreeding seems prevalent in these American populations, suggesting possible reproductive fitness problems in the future. There is evidence of demographic bottlenecking and particularly low genetic diversity in Long Island. Northern Maine had the highest effective population size, suggesting a possible use in future restoration projects. |
format |
Text |
author |
Campanella, James J. Bologna, Paul A. Smalley, John V. Rosenzweig, Eric B. Smith, Stephanie M. |
author_facet |
Campanella, James J. Bologna, Paul A. Smalley, John V. Rosenzweig, Eric B. Smith, Stephanie M. |
author_sort |
Campanella, James J. |
title |
Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
title_short |
Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
title_full |
Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
title_fullStr |
Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
title_full_unstemmed |
Population Structure of Zostera marina (Eelgrass) on the Western Atlantic Coast Is Characterized by Poor Connectivity and Inbreeding |
title_sort |
population structure of zostera marina (eelgrass) on the western atlantic coast is characterized by poor connectivity and inbreeding |
publisher |
Oxford University Press |
publishDate |
2009 |
url |
http://jhered.oxfordjournals.org/cgi/content/short/esp103v1 https://doi.org/10.1093/jhered/esp103 |
geographic |
Long Island |
geographic_facet |
Long Island |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://jhered.oxfordjournals.org/cgi/content/short/esp103v1 http://dx.doi.org/10.1093/jhered/esp103 |
op_rights |
Copyright (C) 2009, American Genetic Association |
op_doi |
https://doi.org/10.1093/jhered/esp103 |
container_title |
Journal of Heredity |
container_volume |
101 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
70 |
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1766133053051109376 |