Planktonic marine luminous bacteria: species distribution in the water column.

摘要: Luminous bacteria were isolated from oceanic water samples taken throughout the upper 1,000 m and ranged in density 0.4 to 30 colony-forming units per 100 ml. Generally, two peaks abundance detected: one of column, which consisted primarily Beneckea spp.; a second between 250 m, almost entirely Photobacterium phosphoreum. The population P. phosphoreum remained relatively stable at station that was visited three times over period 6 months. However, luminous spp. waters fluctuated considerably; they were, as high ml spring not detected winter. Water depths 4,000 7,000 contained less than 0.1 unit apparent vertical stratification taxa may reflect only differences physiology, but also depth-related, species-specific symbiotic associations.