| _version_ | 1867171847177502720 |
|---|---|
| author | Stuckas, Heiko Knöbel, Loreen Schade, Hanna Breusing, Corinna Hinrichsen, Hans-Harald Bartel, Manuela Langguth, Klaudia Melzner, Frank |
| author_facet | Stuckas, Heiko Knöbel, Loreen Schade, Hanna Breusing, Corinna Hinrichsen, Hans-Harald Bartel, Manuela Langguth, Klaudia Melzner, Frank |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | While secondary contact between Mytilus edulis and M. trossulus in North America results in mosaic hybrid zone formation, both species form a hybrid swarm in the Baltic. Despite pervasive gene flow, Baltic Mytilus species maintain substantial genetic and phenotypic differentiation. Exploring mechanisms underlying the contrasting genetic composition in Baltic Mytilus species will allow insights into processes such as speciation or adaptation to extremely low salinity. Previous studies in the Baltic indicated that only weak interspecific reproductive barriers exist and discussed the putative role of adaptation to environmental conditions. Using a combination of hydrodynamic modelling and multilocus genotyping we investigate how oceanographic conditions influence passive larval dispersal and hybrid swarm formation in the Baltic. By combining our analyses with previous knowledge we show a genetic transition of Baltic Mytilus species along longitude 12°-13°E, i.e. a virtual line between Malmö (Sweden) and Stralsund (Germany). Although larval transport only occurs over short distances (10-30 km), limited larval dispersal could not explain the position of this genetic transition zone. Instead, the genetic transition zone is located at the area of maximum salinity change (15 to 10 psu). Thus, we argue that selection results in weak reproductive barriers and local adaptation. This scenario could maintain genetic and phenotypic differences between Baltic Mytilus species despite pervasive introgressive hybridization. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_873699 |
| institution | PANGAEA |
| language | en |
| publishDate | 2017 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Genetic structure of Baltic Mytilus populations Stuckas, Heiko Knöbel, Loreen Schade, Hanna Breusing, Corinna Hinrichsen, Hans-Harald Bartel, Manuela Langguth, Klaudia Melzner, Frank AHP; AHS; AKO; Allele; BAR; Code; Date/Time of event; DIVER; ECK; ESH; Event label; FLB; FSD; GEO; GLT; GRO; GWZ; HEL; HLG; HON; Identification; KAP; LATITUDE; Location; LONGITUDE; MAH; Mussels_Aarhus; Mussels_Ahrenshoop; Mussels_Askoe; Mussels_Barhoeft; Mussels_Dranske; Mussels_Eckernfoerde; Mussels_Fehmarnsund; Mussels_Flensburg; Mussels_Gelting; Mussels_Gollwitz; Mussels_Groemitz; Mussels_Hel; Mussels_Helgoland; Mussels_Kappeln; Mussels_KielFjord_Eastshore; Mussels_KielFjord_GEOMAR; Mussels_KielFjord_Hoern; Mussels_KielFjord_ShipMuseum; Mussels_Maasholm; Mussels_PennCove; Mussels_Steinbeck; Mussels_Tjaernoe; Mussels_Usedom; Mussels_Warnemuende; Mussels_Wendtorf; PCO; RUD; Sample code/label; Sampling by diver; SMU; STB; TJ; USE; WMU; WNF While secondary contact between Mytilus edulis and M. trossulus in North America results in mosaic hybrid zone formation, both species form a hybrid swarm in the Baltic. Despite pervasive gene flow, Baltic Mytilus species maintain substantial genetic and phenotypic differentiation. Exploring mechanisms underlying the contrasting genetic composition in Baltic Mytilus species will allow insights into processes such as speciation or adaptation to extremely low salinity. Previous studies in the Baltic indicated that only weak interspecific reproductive barriers exist and discussed the putative role of adaptation to environmental conditions. Using a combination of hydrodynamic modelling and multilocus genotyping we investigate how oceanographic conditions influence passive larval dispersal and hybrid swarm formation in the Baltic. By combining our analyses with previous knowledge we show a genetic transition of Baltic Mytilus species along longitude 12°-13°E, i.e. a virtual line between Malmö (Sweden) and Stralsund (Germany). Although larval transport only occurs over short distances (10-30 km), limited larval dispersal could not explain the position of this genetic transition zone. Instead, the genetic transition zone is located at the area of maximum salinity change (15 to 10 psu). Thus, we argue that selection results in weak reproductive barriers and local adaptation. This scenario could maintain genetic and phenotypic differences between Baltic Mytilus species despite pervasive introgressive hybridization. |
| title | Genetic structure of Baltic Mytilus populations |
| topic | AHP; AHS; AKO; Allele; BAR; Code; Date/Time of event; DIVER; ECK; ESH; Event label; FLB; FSD; GEO; GLT; GRO; GWZ; HEL; HLG; HON; Identification; KAP; LATITUDE; Location; LONGITUDE; MAH; Mussels_Aarhus; Mussels_Ahrenshoop; Mussels_Askoe; Mussels_Barhoeft; Mussels_Dranske; Mussels_Eckernfoerde; Mussels_Fehmarnsund; Mussels_Flensburg; Mussels_Gelting; Mussels_Gollwitz; Mussels_Groemitz; Mussels_Hel; Mussels_Helgoland; Mussels_Kappeln; Mussels_KielFjord_Eastshore; Mussels_KielFjord_GEOMAR; Mussels_KielFjord_Hoern; Mussels_KielFjord_ShipMuseum; Mussels_Maasholm; Mussels_PennCove; Mussels_Steinbeck; Mussels_Tjaernoe; Mussels_Usedom; Mussels_Warnemuende; Mussels_Wendtorf; PCO; RUD; Sample code/label; Sampling by diver; SMU; STB; TJ; USE; WMU; WNF |
| url | https://doi.org/10.1594/PANGAEA.873699 |