Ginsburg, D.V. Voitov, The Håkon Mosby mud volcano in the Norwegian Sea; results of multidisciplinary studies with manned submersibles, Oceanology 39 (1999) 374-380. - 32 - C. Edy, H. Bisquay, J.-P. Foucher [...] discovery of a surprisingly high biodiversity in the deep-sea only some decades ago led to intense studies on the reasons for this unexpected finding. The diversity of sediment-inhabiting organisms in certain [...] and correlate them with abiotic and biotic gradients in the vicinity of biogenic structures. Our studies mainly focus on bacteria, foraminiferans, and nematodes, as they represent the dominant groups of