Team DiSEEM - Dispersal, Speciation and Evolution of Marine Species
The DiSEEM team studies connectivity between populations of marine organisms at different spatial scales and its consequences on evolutionary processes: in particular, adaptation to environmental heterogeneity, the evolution of reproductive isolation between populations, and the long-term evolution of reproductive systems and thermotolerance in marine organisms.
Presentation
We work on various biological models from intertidal, coastal, and deep-sea environments (mainly invertebrate species) that are relevant to our research topics, and use a variety of complementary approaches:
- methods based on geochemical tracers and sclerochronology of larval shells to study the dispersal of bivalves and gastropods
- hydrodynamic modeling of larval dispersion to infer connectivity between populations
- population genetics and genomics to explore intraspecific diversity and the genetic basis of reproductive isolation between species
- ancestral reconstruction and biochemical analyses of proteins to study adaptation to extreme environments
- theoretical population genetics to study the evolutionary forces affecting the evolution of reproductive systems
Axis 1: Larval dispersal, connectivity, and population resilience
- Resilience of hydrothermal populations in the face of deep-sea mining: connectivity and adaptability of populations
- Dispersion of non-native species and contribution to coastal meroplankton dynamics
Axis 2: Adaptation to heterogeneous marine environments
- Adaptation of deep-sea hydrothermal species proteins to temperature and hydrostatic pressure
- Adaptation of species to urbanized marine ecosystems (ports), local adaptation of intertidal species along the shore
Axis 3: Speciation genomics
- Role of chromosomal rearrangements and sex chromosomes in reproductive isolation
- Evolution of sexual isolation
- Effect of recolonization dynamics on speciation processes
Projects: sexual isolation
Axis 4: Evolution of reproductive systems and genetic architecture
- Evolution of sex and life cycles
- Evolution of recombination landscapes
- Evolution of sex chromosomes and dosage compensation
Projects: evolution of sexual systems, recLandscapes
Contact(s)
- Thierry Comtet
- Denis Roze
Projects
Sexual isolation
Evolution of behavioural sexual isolation in marine isopods (Jaera albifrons complex)
Evolution of sexual systems
Evolution of sexual systems and sex determination in deep-sea gastropods (Alviniconcha sp.)
Population genetics of the ivory gull
Life-history of the ivory gull, an emblematic species of the High Arctic
People
Publications
Estimating the reduction in genetic diversity from background selection under non-equilibrium demography and partial selfing
Alexander Mackintosh, Maxence Brault, Denis Roze, Martin Lascoux, Sylvain Glémin. Estimating the reduction in genetic diversity from background selection under non-equilibrium demography and partial selfing. Molecular Biology and Evolution, In press, ⟨10.1093/molbev/msag004⟩. ⟨hal-05456156⟩
Exploration of the extracellular matrix of the red alga Chondrus crispus reveals unprecedented insights into carrageenan structures
David Ropartz, Adrien Lissarrague, Murielle Jam, Diane Jouanneau, Bastien Annic, et al.. Exploration of the extracellular matrix of the red alga Chondrus crispus reveals unprecedented insights into carrageenan structures. Carbohydrate Polymers, 2025, 348, pp.122737. ⟨10.1016/j.carbpol.2024.122737⟩. ⟨hal-04734206⟩
Sex chromosomes and chromosomal rearrangements are key to behavioural sexual isolation in Jaera albifrons marine isopods
Ambre Ribardiere, Claire Daguin-Thiebaut, Jerome Coudret, Gildas Le Corguille, Komlan Avia, et al.. Sex chromosomes and chromosomal rearrangements are key to behavioural sexual isolation in Jaera albifrons marine isopods. 2025. ⟨hal-04923366⟩
A single theory for the evolution of sex chromosomes and the two rules of speciation
Thomas Lenormand, Denis Roze. A single theory for the evolution of sex chromosomes and the two rules of speciation. Science, 2025, 389, pp.eado9032. ⟨10.1126/science.ado9032⟩. ⟨hal-04736667⟩
A Long‐Term Ecological Research Data Set From the Marine Genetic Monitoring Program ARMS ‐ MBON 2018–2020
Nauras Daraghmeh, Katrina Exter, Justine Pagnier, Piotr Bałazy, Ibon Cancio, et al.. A Long‐Term Ecological Research Data Set From the Marine Genetic Monitoring Program ARMS ‐ MBON 2018–2020. Molecular Ecology Resources, 2025, pp.e14073. ⟨10.1111/1755-0998.14073⟩. ⟨hal-04965970v2⟩
An Evolutionary Mosaic Challenges Traditional Monitoring of a Foundation Species in a Coastal Environment—The Baltic Fucus vesiculosus
Ricardo Pereyra, Alexandra Kinnby, Alan Le Moan, Olga Ortega-Martinez, Per Jonsson, et al.. An Evolutionary Mosaic Challenges Traditional Monitoring of a Foundation Species in a Coastal Environment—The Baltic Fucus vesiculosus. Molecular Ecology, 2025, ⟨10.1111/mec.17699⟩. ⟨hal-04968495⟩
News
Scientific publication
[PCI Evolbiol] Jaera albifrons: the re-emergence of a model system for speciation research in the genomic era
Publié le 20 November 2025
Actualité grand public
Parution du livre "L'oiseau des glaces", une aventure scientifique et humaine sur les glaces du Groenland, à la rencontre de l’oiseau le plus septentrional du monde, la mouette ivoire.
Publié le 21 November 2025