Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga

This study investigates the genetic structure of an eukaryotic microorganism, the toxic dinoflagellate Alexandrium ostenfeldii, from the Baltic Sea, a geologically young and ecologically marginal brackish water estuary which is predicted to support evolution of distinct, genetically impoverished lin...

Descripción completa

Detalles Bibliográficos
Autores: Tahvanainen, Pia, Alpermann, T.J., Figueroa, Rosa Isabel, Uwe, J., Hakanen, P., Nagai, Shatoshi, Blomster, J., Kremp, A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/321740
Acceso en línea:http://hdl.handle.net/10261/321740
Access Level:acceso abierto
Palabra clave:Medio Marino
AFLP
Centro Oceanográfico de Vigo
Alexandrium ostenfeldii
Genetic structure
biodiversity
climate
fisheries
ecology
id ES_fee30fea4cc2f70534bc583466fd131a
oai_identifier_str oai:digital.csic.es:10261/321740
network_acronym_str ES
network_name_str España
repository_id_str
spelling Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-algaTahvanainen, PiaAlpermann, T.J.Figueroa, Rosa IsabelUwe, J.Hakanen, P.Nagai, ShatoshiBlomster, J.Kremp, A.Medio MarinoAFLPCentro Oceanográfico de VigoAlexandrium ostenfeldiiGenetic structurebiodiversityclimatefisheriesecologyThis study investigates the genetic structure of an eukaryotic microorganism, the toxic dinoflagellate Alexandrium ostenfeldii, from the Baltic Sea, a geologically young and ecologically marginal brackish water estuary which is predicted to support evolution of distinct, genetically impoverished lineages of marine macroorganisms. Analyses of the internal transcribed spacer (ITS) sequences and Amplified Fragment Length Polymorphism (AFLP) of 84 A. ostenfeldii isolates from five different Baltic locations and multiple external sites revealed that Baltic A. ostenfeldii is phylogenetically differentiated from other lineages of the species and micro-geographically fragmented within the Baltic Sea. Significant genetic differentiation (FST) between northern and southern locations was correlated to geographical distance. However, instead of discrete genetic units or continuous genetic differentiation, the analysis of population structure suggests a complex and partially hierarchic pattern of genetic differentiation. The observed pattern suggests that initial colonization was followed by local differentiation and varying degrees of dispersal, most likely depending on local habitat conditions and prevailing current systems separating the Baltic Sea populations. Local subpopulations generally exhibited low levels of overall gene diversity. Association analysis suggests predominately asexual reproduction most likely accompanied by frequency shifts of clonal lineages during planktonic growth. Our results indicate that the general pattern of genetic differentiation and reduced genetic diversity of Baltic populations found in large organisms also applies to microscopic eukaryotic organisms.SI202320232012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/321740reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésCentro Oceanográfico de Vigoinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3217402026-05-22T06:33:51Z
dc.title.none.fl_str_mv Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
title Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
spellingShingle Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
Tahvanainen, Pia
Medio Marino
AFLP
Centro Oceanográfico de Vigo
Alexandrium ostenfeldii
Genetic structure
biodiversity
climate
fisheries
ecology
title_short Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
title_full Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
title_fullStr Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
title_full_unstemmed Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
title_sort Patterns of post-glacial genetic differentiation in marginal populations of a marine micro-alga
dc.creator.none.fl_str_mv Tahvanainen, Pia
Alpermann, T.J.
Figueroa, Rosa Isabel
Uwe, J.
Hakanen, P.
Nagai, Shatoshi
Blomster, J.
Kremp, A.
author Tahvanainen, Pia
author_facet Tahvanainen, Pia
Alpermann, T.J.
Figueroa, Rosa Isabel
Uwe, J.
Hakanen, P.
Nagai, Shatoshi
Blomster, J.
Kremp, A.
author_role author
author2 Alpermann, T.J.
Figueroa, Rosa Isabel
Uwe, J.
Hakanen, P.
Nagai, Shatoshi
Blomster, J.
Kremp, A.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Medio Marino
AFLP
Centro Oceanográfico de Vigo
Alexandrium ostenfeldii
Genetic structure
biodiversity
climate
fisheries
ecology
topic Medio Marino
AFLP
Centro Oceanográfico de Vigo
Alexandrium ostenfeldii
Genetic structure
biodiversity
climate
fisheries
ecology
description This study investigates the genetic structure of an eukaryotic microorganism, the toxic dinoflagellate Alexandrium ostenfeldii, from the Baltic Sea, a geologically young and ecologically marginal brackish water estuary which is predicted to support evolution of distinct, genetically impoverished lineages of marine macroorganisms. Analyses of the internal transcribed spacer (ITS) sequences and Amplified Fragment Length Polymorphism (AFLP) of 84 A. ostenfeldii isolates from five different Baltic locations and multiple external sites revealed that Baltic A. ostenfeldii is phylogenetically differentiated from other lineages of the species and micro-geographically fragmented within the Baltic Sea. Significant genetic differentiation (FST) between northern and southern locations was correlated to geographical distance. However, instead of discrete genetic units or continuous genetic differentiation, the analysis of population structure suggests a complex and partially hierarchic pattern of genetic differentiation. The observed pattern suggests that initial colonization was followed by local differentiation and varying degrees of dispersal, most likely depending on local habitat conditions and prevailing current systems separating the Baltic Sea populations. Local subpopulations generally exhibited low levels of overall gene diversity. Association analysis suggests predominately asexual reproduction most likely accompanied by frequency shifts of clonal lineages during planktonic growth. Our results indicate that the general pattern of genetic differentiation and reduced genetic diversity of Baltic populations found in large organisms also applies to microscopic eukaryotic organisms.
publishDate 2012
dc.date.none.fl_str_mv 2012
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/321740
url http://hdl.handle.net/10261/321740
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Centro Oceanográfico de Vigo
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869425725093707776
score 15,812429

Similares en LA Referencia