SEASONAL FLUCTUATION OF BACTERIAL NUMBERS NEAR THE ANTARCTIC CONTINENT (Eleventh Symposium on Polar Biology)

• Main Authors: GIBSON, John A. E., GARRICK, Russell C., BURTON, Harry R.
• Language: English
• Published: National Institute of Polar Research 1990
• Subjects: Antarctic; The Antarctic; Antarc*; Polar Biology; Proceedings of the NIPR Symposium on Polar Biology
• Online Access: https://nipr.repo.nii.ac.jp/record/5084/files/KJ00000767460.pdf; https://doi.org/10.15094/00005084; https://nipr.repo.nii.ac.jp/records/5084

P(論文) Bacterial numbers were monitored on a regular basis near Australia's Davis Base from May 1987 until January 1988. Samples were collected from depths between the surface and 80m. Numbers were low (mean: ca. 1.1×10^5 cells/ml) during the winter period but rose to between 2.5×10^5 and 8.0×10^5 cells/ml, depending on depth, in October, when considerable amounts of detrital material were present in water column and available for heterotrophic activity. A significant decrease in bacterial numbers occurred in early December to <0.5×10^5 cells/ml, but recovered later in December to >5×10^5 cells/ml; the increase in numbers occurred at the same time as a bloom of the alga Phaeocystis pouchetii. The greatest population of bacteria (>1×10^6 cells/ml) was recorded in January, by which time the algal bloom was decreasing. departmental bulletin paper