Deep-Sea Species Diversity: Decreased Gastropod Diversity at Abyssal Depths

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Science  14 Sep 1973:
Vol. 181, Issue 4104, pp. 1051-1053
DOI: 10.1126/science.181.4104.1051


Gastropod species diversity is low on the continental shelf, high on the continental slope and abyssal rise, and then decreases with increasing distance out onto the abyssal plain. Increased diversity below the continental shelf has been attributed to increased environmental stability. Decreased diversity on the abyss may result from extremely low productivity.