mediterranean sea biome dilution basin mediterranean sea biome 2010-03-19T09:32:59Z ENVO ENVO:01000128 ORCID:0000-0002-4366-3088 The dilution basin mediterranean sea biome comprises expressions of the mediterranean sea biome with lower salinity than the surrounding ocean due to freshwater gains such as rainfall and rivers. Water exchange consists of outflow of the fresher mediterranean water in the upper layer and inflow of the saltier oceanic water in the lower layer of the channel. Renewal of deep water may not be sufficient to supply oxygen to the bottom.