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The paper aims to assess the macrobenthic diversity and habitats distribution in front of the Danube mouth along a depth gradient on the Romanian Black Sea shelf. During the reference 60 - 70?s period the benthic community diversity accounted for 75 species. In the 80?s (starting of eutrophication period) this has sharply decreased to 45 species as result of the ecological collapse due to economic development of the riverine Black Sea countries?. However, the area is naturally under the influence of the riverine i...