The project was designed to explore biological rhythms in the hydrothermal vent mussel Bathymodiolus azoricus. The experiment provides the first high-resolution temporal transcriptomes of an hydrothermal species, both in situ and in the laboratory.

The ABYSS project aims at describing deep-sea benthic biodiversity spanning several branches of the tree of life with eDNA metabarcoding tools. To accommodate both micro- and macro biologists, we designed a bioinformatic pipeline based on Illumina read correction with Dada2 allowing analysing metabarcodes from prokaryotic and eukaryotic life compartments.

We explored the whole digestive gland transcriptome in the Pacific oyster Crassostrea gigas using Illumina sequencing technology and compare the expression patterns obtained in: i) oysters exposed experimentally at environmentally-realistic concentration to Alexandrium minutum Daoulas1257 strain isolated from the Bay of Brest in France producing only PSTs; ii) AM89BM strain, isolated from the Bay of Morlaix in France producing both PSTs and BECs; iii) CCMI1002 strain, isolated from Irish waters producing only BECs; and iv) control oysters fed with the non-toxic dinoflagellate Heterocapsa triquetra.