Nutrients depression in the blooming area of Prydz Bay, Antarctica

• Main Authors: Fukui,Fukashi, Otomo,Kazuhiro, Okabe,Shiro
• Format: Report
• Language: English
• Published: Environmental Division of Shimizu City/Faculty of Marine Science and Technology, Tokai University/Faculty of Marine Science and Technology, Tokai University 1986
• Subjects: Indian; Prydz Bay; Southern Ocean; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2031; http://id.nii.ac.jp/1291/00002031/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2031&item_no=1&attribute_id=18&file_no=1

During the SIBEX cruise of R. V. KAIYO MARU to the Indian Sector of the Southern Ocean in 1983/84,nutrient depression in the phytoplankton blooming was observed in the innermost part of Prydz Bay (75°01.2′E, 69°01.4′S). The lowest concentrations of inorganic phosphate (0.30μg-at/l), dissolved total phosphorus (1.06μg-at/l), nitrate (10.5μg-at/l) and silicate (8μg-at/l) were observed, while the concentration of dissolved organic phosphorus (0.76μg-at/l) as well as chlorophyll α (2.19μg/l) was high. These low concentrations of inorganic nutrients would be attributable to the consumption by phytoplankton. However, phosphate and silicate seem to be consumed faster than nitrate is.