39 documents found, page 1 of 4
Not out of the Mediterranean: Atlantic populations of the gorgonian Paramuricea...
A. G. Coelho, Márcio; Pearson, Gareth Anthony; Boavida, Joana; Paulo, Diogo; Aurelle, Didier; ARNAUD-HAOND, Sophie; Gómez-Gras, DanielThe accurate delimitation of species boundaries in nonbilaterian marine taxa is notoriously difficult, with consequences for many studies in ecology and evolution. Anthozoans are a diverse group of key structural organisms worldwide, but the lack of reliable morphological characters and informative genetic markers hampers our ability to understand species diversification. We investigated population differentiat...
Out of the Mediterranean? Post-glacial colonization pathways varied among cold-...
boavida, joana; Becheler, Ronan; Choquet, Marvin; Frank, Norbert; Taviani, Marco; Bourillet, Jean-Francois; Meistertzheim, Anne-Leila; Grehan, AnthonyAim: To infer cold-water corals' (CWC) post-glacial phylogeography and assess the role of Mediterranean Sea glacial refugia as origins for the recolonization of the northeastern Atlantic Ocean. Location: Northeastern Atlantic Ocean and Mediterranean Sea. Taxon: Lophelia pertusa, Madrepora oculata. Methods: We sampled CWC using remotely operated vehicles and one sediment core for coral and sediment dating. We ch...
Entangled fates of holobiont genomes during invasion: nested bacterial and host...
ARNAUD-HAOND, Sophie; Aires, T; Candeias, R.; Teixeira, S. J. L.; Duarte, C. M.; Valero, M.; A, SerrãoSuccessful prevention and mitigation of biological invasions requires retracing the initial steps of introduction, as well as understanding key elements enhancing the adaptability of invasive species. We studied the genetic diversity of the green alga Caulerpa taxifolia and its associated bacterial communities in several areas around the world. The striking congruence of alpha and beta diversity of the algal ge...
The Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe com...
Rabouille, C.; Olu, K.; Baudin, F.; Khripounoff, A.; Dennielou, B.; ARNAUD-HAOND, Sophie; Babonneau, N.; Bayle, C.; Beckler, J.; Bessette, S.The presently active region of the Congo deep-sea fan (around 330,000 km(2)), called the terminal lobes or lobe complex, covers an area of 2500 km(2) at 4700-5100 m water depth and 750-800 km offshore. It is a unique sedimentary area in the world ocean fed by a submarine canyon and a channel-levee system which presently deliver large amounts of organic carbon originating from the Congo River by turbidity curren...
A well-kept treasure at depth: precious red coral rediscovered in Atlantic deep...
Boavida, Joana; Paulo, Diogo; Aurelle, Didier; ARNAUD-HAOND, Sophie; Marschal, Christian; Reed, John; Gonçalves, J. M. S.; Serrão, EsterThe highly valuable red coral Corallium rubrum is listed in several Mediterranean Conventions for species protection and management since the 1980s. Yet, the lack of data about its Atlantic distribution has hindered its protection there. This culminated in the recent discovery of poaching activities harvesting tens of kg of coral per day from deep rocky reefs off SW Portugal. Red coral was irregularly exploited...
Rising the persian gulf black-lip pearl oyster to the species level: fragmented...
Ranjbar, Mohammad Sharif; Zolgharnien, Hossein; Yavari, Vahid; Archangi, Bita; Salari, Mohammad Ali; ARNAUD-HAOND, Sophie; Lopes Da Cunha, ReginaMarine organisms with long pelagic larval stages are expected to exhibit low genetic differentiation due to their potential to disperse over large distances. Growing body of evidence, however, suggests that marine populations can differentiate over small spatial scales. Here we focused on black-lip pearl oysters from the Persian Gulf that are thought to belong to the Pinctada margaritifera complex given their m...
Hologenome theory supported by cooccurrence networks of species-specific bacter...
Aires, Tânia; Moalic, Yann; Serrao, Ester A.; ARNAUD-HAOND, SophieThe siphonous algae of the Caulerpa genus harbor internal microbial communities hypothesized to play important roles in development, defense and metabolic activities of the host. Here, we characterize the endophytic bacterial community of four Caulerpa taxa in the Mediterranean Sea, through 16S rRNA amplicon sequencing. Results reveal a striking alpha diversity of the bacterial communities, similar to levels fo...
Disentangling the Influence of Mutation and Migration in Clonal Seagrasses Usin...
ARNAUD-HAOND, Sophie; Moalic, Yann; Hernandez-Garcia, Emilio; Eguíluz, Víctor M.; Alberto, Filipe; Serrao, Ester A.; Duarte, Carlos M.The recurrent lack of isolation by distance reported at regional scale in seagrass species was recently suggested to stem from stochastic events of large-scale dispersal. We explored the usefulness of phylogenetic information contained in microsatellite loci to test this hypothesis by using the Genetic Diversity Spectrum (GDS) on databases containing, respectively, 7 and 9 microsatellites genotypes for 1541 sam...
Microsatellite markers developed through pyrosequencing allow clonal discrimina...
ARNAUD-HAOND, Sophie; Candeias, Rui; Serrão, Ester; Teixeira, SaraPolymorphic microsatellites were developed for the invasive green algae Caulerpa taxifolia using next generation DNA sequencing. Results showed a limited rate of microsatellites for the amount of sequences, possibly explaining failure of previous attempts for microsatellite development through classical methods. Eight polymorphic loci were selected that exhibited polymorphism and a null or negligible rate of am...
High connectivity across the fragmented chemosynthetic ecosystems of the deep A...
Teixeira, Sara; Olu, Karine; Decker, C.; Cunha, R. L.; Fuchs, S.; Hourdez, S.; Serrão, Ester; ARNAUD-HAOND, SophieChemosynthetic ecosystems are distributed worldwide in fragmented habitats harbouring seemingly highly specialized communities. Yet, shared taxa have been reported from highly distant chemosynthetic communities. These habitats are distributed in distinct biogeographical regions, one of these being the so-called Atlantic Equatorial Belt (AEB). Here, we combined genetic data (COI) from several taxa to assess the ...