Title :

Geographic isolation and larval dispersal shape seascape genetic patterns differently according to spatial scale

Author(s) :

Dalongeville, Alicia [Auteur]
Centre d’Ecologie Fonctionnelle et Evolutive [CEFE]
Andrello, Marco [Auteur]
Centre d’Ecologie Fonctionnelle et Evolutive [CEFE]
Mouillot, David [Auteur]
MARine Biodiversity Exploitation and Conservation [UMR MARBEC]
Lobreaux, Stephane [Auteur]
Laboratoire d'Ecologie Alpine [LECA ]
Fortin, Marie-Josee [Auteur]
Department of Ecology and Evolutionary Biology [University of Toronto] [EEB]
Ben Rais Lasram, Frida [Auteur]
Université du Littoral Côte d'Opale [ULCO]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Belmaker, Jonathan [Auteur]
Steinhardt Museum of Natural History [SMNH]
Rocklin, Delphine [Auteur]
Memorial University of Newfoundland = Université Memorial de Terre-Neuve [St. John's, Canada] [MUN]
Manel, Stéphanie [Auteur]
Université Paul-Valéry - Montpellier 3 [UPVM]

Journal title :

Evolutionary Applications

Pages :

1437-1447

Publisher :

Blackwell

Publication date :

2018-09

ISSN :

1752-4563

English keyword(s) :

Seascape genetics
Single nucleotide polymorphism
Mullus surmuletus
Connectivity
Ecological genetics
Marine fish
Mediterranean Sea

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial ...
Show more >Genetic variation, as a basis of evolutionary change, allows species to adapt and persist in different climates and environments. Yet, a comprehensive assessment of the drivers of genetic variation at different spatial scales is still missing in marine ecosystems. Here, we investigated the influence of environment, geographic isolation, and larval dispersal on the variation in allele frequencies, using an extensive spatial sampling (47 locations) of the striped red mullet (Mullus surmuletus) in the Mediterranean Sea. Univariate multiple regressions were used to test the influence of environment (salinity and temperature), geographic isolation, and larval dispersal on single nucleotide polymorphism (SNP) allele frequencies. We used Moran's eigenvector maps (db-MEMs) and asymmetric eigenvector maps (AEMs) to decompose geographic and dispersal distances in predictors representing different spatial scales. We found that salinity and temperature had only a weak effect on the variation in allele frequencies. Our results revealed the predominance of geographic isolation to explain variation in allele frequencies at large spatial scale (>1,000km), while larval dispersal was the major predictor at smaller spatial scale (<1,000km). Our findings stress the importance of including spatial scales to understand the drivers of spatial genetic variation. We suggest that larval dispersal allows to maintain gene flows at small to intermediate scale, while at broad scale, genetic variation may be mostly shaped by adult mobility, demographic history, or multigenerational stepping-stone dispersal. These findings bring out important spatial scale considerations to account for in the design of a protected area network that would efficiently enhance protection and persistence capacity of marine species.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Paris Sciences et Lettres

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL