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9. Marine Speciation

Session organizers:

Rui Faria, University of Sheffield.
Anja Westram, University of Sheffield.
Sean Stankowski, University of Sheffield.
Roger Butlin, University of Sheffield.

Contact E-mail: r.macieiradefaria@sheffield.ac.uk

The marine realm harbours a significant component of the biodiversity on Earth. However, given that many marine species disperse long distances, it was difficult to reconcile the origin of this diversity with the historical view that speciation occurs mostly in strict allopatry. Although empirical evidence supporting speciation in the face of gene flow has been accumulating, our current knowledge on the mechanisms of speciation in the sea is still limited compared to non-marine ecosystems.

In order to counteract this bias, we propose a session on “marine speciation”. By bringing together state-of-the-art tools from different disciplines, we aim to highlight the diversity of evolutionary processes and reproductive barriers involved in speciation of marine organisms across a variety of ecosystems, a range of taxonomic groups and different oceanographic regions.

Building on participants’ contributions, we will foster discussion on the main differences between the speciation mechanisms occurring in the different marine ecosystems, and what (if anything) makes speciation in the sea different from terrestrial and freshwater environments. Among other questions, we would like to understand the roles of different barriers to gene flow and the genetic architecture of speciation in the sea, comparing these features to the emerging consensus based on non-marine systems.


Thomas Broquet - Sexual isolation and genetic differentiation between marine isopods

Carl André - Genome architecture enables local adaptation and speciation in Atlantic cod

Maud Duranton - Identifying the evolutionary processes underlying the genomic landscape of species divergence, insights from haplotype-resolved genomes in the European sea bass

Kerstin Johannesson - Mechanisms of rapid divergence and speciation with gene flow in a marine snail

Paolo Momigliano - Rapid ecological speciation in a marine fish.

Abigail Cahill - Cryptic species in the marine environment: patterns and potential processes

Gareth Pearson - Allopolyploid speciation in brown algae: Genome-wide effects on expression and divergence

Ola Svensson - Immigrant reproductive dysfunction facilitates ecological speciation

Myriam Valero - Analysing pre- and post-zygotic barriers in haploid diploid species

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