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Regional genetic differentiation in the blue mussel from the Baltic Sea area
Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.ORCID-id: 0000-0002-3667-3667
SLU.
Göteborgs universitet.
Södertörns högskola, Institutionen för naturvetenskap, miljö och teknik, Miljövetenskap.ORCID-id: 0000-0003-3389-4162
Visa övriga samt affilieringar
2017 (Engelska)Ingår i: Estuarine, Coastal and Shelf Science, ISSN 0272-7714, E-ISSN 1096-0015, s. 98-109Artikel i tidskrift (Refereegranskat) Published
Resurstyp
Text
Abstract [en]

Connectivity plays an important role in shaping the genetic structure and in evolution of local adaptation. In the marine environment barriers to gene flow are in most cases caused by gradients in environmental factors, ocean circulation and/or larval behavior. Despite the long pelagic larval stages, with high potential for dispersal many marine organisms have been shown to have a fine scale genetic structuring. In this study, by using a combination of high-resolution genetic markers, species hybridization data and biophysical modeling we can present a comprehensive picture of the evolutionary landscape for a keystone species in the Baltic Sea, the blue mussel. We identified distinct genetic differentiation between the West Coast, Baltic Proper and Bothnian Sea regions, with lower gene diversity in the Bothnian Sea. Oceanographic connectivity together with salinity and to some extent species identity provides explanations for the genetic differentiation between the West Coast and the Baltic Sea (Baltic Proper and Bothnian Sea). The genetic differentiation between the Baltic Proper and Bothnian Sea cannot be directly explained by oceanographic connectivity, species identity or salinity, while the lower connectivity to the Bothnian Sea may explain the lower gene diversity. © 2016.

Ort, förlag, år, upplaga, sidor
Academic Press, 2017. s. 98-109
Nyckelord [en]
AFLP, Baltic Sea, Barrier, Gene flow, Oceanographic connectivity, Population genetics
Nationell ämneskategori
Miljövetenskap
Forskningsämne
Miljövetenskapliga studier; Östersjö- och Östeuropaforskning
Identifikatorer
URN: urn:nbn:se:sh:diva-30647DOI: 10.1016/j.ecss.2016.06.016ISI: 000408787800012Scopus ID: 2-s2.0-84977120681Lokalt ID: 1328/42/2010OAI: oai:DiVA.org:sh-30647DiVA, id: diva2:949491
Ingår i projekt
Evolutionära anpassningar till miljöstörningar i marina ekosystem: genetisk ekotoxologi i Östersjön, Östersjöstiftelsen
Forskningsfinansiär
Östersjöstiftelsen, A063-2010Tillgänglig från: 2016-07-20 Skapad: 2016-07-19 Senast uppdaterad: 2021-12-17Bibliografiskt granskad
Ingår i avhandling
1. Genetic Aspects of Environmental Disturbances in Marine Ecosystems: Studies of the Blue Mussel in the Baltic Sea
Öppna denna publikation i ny flik eller fönster >>Genetic Aspects of Environmental Disturbances in Marine Ecosystems: Studies of the Blue Mussel in the Baltic Sea
2017 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Anthropogenic environmental changes can serve as drivers for evolutionary responses in wild populations. To predict the long-term impact of anthropogenic changes on populations, it is crucial to understand the genetic effects caused by these disturbances. The Baltic Sea is considered to be one of the world’s most contaminated seas, and the increase of anthropogenic chemical pollution is a major threat to its ecosystems. This thesis assesses the impact of harbors and sewage treatment plants on physiological traits and genetic structure of resident populations of blue mussels at replicated sites in the Baltic Sea. The initial evaluation of the overall genetic pattern in blue mussel populations in the Swedish West Coast, the Baltic Proper and the Bothnian Sea found genetic differentiation between the three water basins and a low genetic differentiation within each basin, especially within the Baltic Proper. Despite the low genetic differentiation among blue mussels within the Baltic Proper, a parallel genetic differentiation associated with sewage treatment plant effluents was found in this basin. This included genomic regions with a high degree of differentiation between reference sites and sites affected by sewage plants effluent. This genetic differentiation is suggested to be due to post-dispersal selection acting in each generation. In contrast, no parallel genetic differentiation was associated with harbors. We identified five genomic regions in blue mussels, showing strong signs of selection, shared among three out of four replicated reference sites and sites affected by sewage effluents in the Baltic Proper i.e. Askö, Tvärminne and Karlskrona. An initial characterization of these genomic regions revealed functions related to immune and endocrine responses, oxidative stress and shell formation. Our results indicate that selection caused by sewage effluents involves multiple loci. The same genomic regions are found across different locations in the Baltic Proper but there are also unique genomic regions at each location. No genotoxic or histopathological effects were found among blue mussels from sewage effluent-affected areas but a higher frequency of histological abnormalities in the digestive gland were observed in mussels from harbors.

Ort, förlag, år, upplaga, sidor
Huddinge: Södertörns högskola, 2017. s. 71
Serie
Södertörn Doctoral Dissertations, ISSN 1652-7399 ; 148
Nyckelord
Blue mussel, Baltic Sea, anthropogenic disturbance, pollution, sewage effluents, harbors, genetics, genomics
Nationell ämneskategori
Biologiska vetenskaper
Forskningsämne
Miljövetenskapliga studier; Östersjö- och Östeuropaforskning
Identifikatorer
urn:nbn:se:sh:diva-33697 (URN)1328/42/2010 (Lokalt ID)978-91-88663-23-8 (ISBN)978-91-88663-24-5 (ISBN)1328/42/2010 (Arkivnummer)1328/42/2010 (OAI)
Disputation
2017-12-15, MA636, Alfred Nobels allé 7, Huddinge, 10:00 (Engelska)
Opponent
Handledare
Forskningsfinansiär
Östersjöstiftelsen, A063-2010
Tillgänglig från: 2017-11-23 Skapad: 2017-11-14 Senast uppdaterad: 2021-01-25Bibliografiskt granskad

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Larsson, JosefineGrahn, MatsSmolarz, KatarzynaLönn, Mikael

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Larsson, JosefineGrahn, MatsSmolarz, KatarzynaLönn, Mikael
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Estuarine, Coastal and Shelf Science
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