Figure 260. Comparison of specific occurrences of selected species in water column and in sediment samples, as indicated by the ratio between the number of times a given species was recorded in the water-column vs. the number of times it was recorded in the sediments. Numbers in parentheses after each species name denote numbers of samples where it was recorded in water column materials (first figure) and in sedimentary materials (second figure). For columns graphed, the total number of occurrences in the water column and in the sediments were corrected for total number of water column and sediment samples in the database.