HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

The effect of methane seepage from sediments harbouring shallow gas hydrates on standing stocks and the distribution pattern of meiobenthic organisms, in particular Nematoda and Rotifera, was studied at about 800 m water depth at Hydrate Ridge, Cascadia subduction zone, off Oregon. The presence of shallow gas hydrates, buried only a few 10s of centimetres below the sediment surface, was indicat...

Establishing robust estimates of polar marine biodiversity is important for interpreting future changes in the Arctic; however, despite a recent increase scientific expeditions, this region remains relatively underexplored. Particularly overlooked assessments are small species, such as protists, fungi, and many invertebrates that collectively known meiofauna. These species contribute to foundat...

This study assesses the impact of local iron enrichment on small benthic biota (bacteria, meiofauna) at deep seafloor. To evaluate hypothesis that abundance, distribution, and diversity varies in relation to a input structural steel seabed, we analyzed sediment samples associated infauna along short transect (~1.5 m length) with increasing distance an source, i.e., corroding weights (30 cm leng...