A SEASONAL STUDY OF MARINE BACTERIA IN ADMIRALTY BAY (ANTARCTICA)

• Main Author: Stuart P. Donachie
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Admiralty Bay; Austral; Southern Ocean; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.539.5524; http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Donachie.pdf

April 1990 to January 1991. Neither CFU (Colony Forming Units on nutrient media, ca. lo3//), nor total bacteria (AODC-Acridine Orange Direct Count, ca. lo7//) numbers varied significantly over the 400 m water column; temporal variation was low, and means and ranges decreased with depth. Significantly more CFU were isolated from 100 m and 200 m after incubation at 15 OC than 1 "C (p < 0.05). Close inshore in Half Moon Cove, bacterial numbers at 5 and 10 m depth were similar to those at the bay's centre; significantly more CFU were also isolated here after incubation at 15 1. Mean cell volume and biomass in the upper 100 m was 0.228 fim3 (n = 1636), and 50.63 fg C/cell respectively. Bacterial carbon in the upper 100 m (mean 3.415 fig C/l) ranged widely (August, 0.338 fig/[; January, 37.321 fig/[). Rods dominated the total bacteria in most samples. Values of a number of these parameters to levels below those usually reported here during offshore summer cruises, underline the importance of long-term inshore bacteriological studies in the Southern Ocean, particularly over the austral winter.