The Influence OP Vertical Circulation on the Phytoplankton in the Bering Sea

✍ Scribed by H. J. Semina

• Publisher: John Wiley and Sons
• Year: 1960
• Tongue: English
• Weight: 579 KB
• Volume: 45
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19600450102

✦ Synopsis

Up to now a comparison of vertical stability regarding the phytoplankfon development was carried out only in very limited areas or in isolated hydrological sections of the open ocean. The only exclusion is the paper by BRAARUD and 0th. (1953) accomplished in the shallow-water Northern Sea. We thought it interesting to carry out a comparison of vertical stability with phytoplankton in a large ocean area including both shallow-water and deep-water regions. Therefore we chose the Western parts of the Bering Sea and of the Pacific off Kamchatka coast. We used the data obtained during fourtrips of r/v "Vityaz": the 5th (Aug.-Sept. 1950),the 8th (Sept.-Oct. 1951), 10th (May-June 1952), and 20th (June 1955). The trips were not carried out specially for the sake of this investigation neither were the stations during the trips occupied a t the same localities. The stations were spaced 30-50 miles of one another, near shore sometimes 5-15 miles. In total I used phytoplankton and stability data from about 400 stations. The bulk of the plankton samples was treated by settling technique. A part of them was taken by net 75, 400, and occasionaly 200 m.

'The stability of water layers was calculated in the upper 100 m a t the following levels: 0-10, 10-25, 25-35, 35-50, 50-75, 75-100 m. I used the formula:

were ot is the specific density and z is the depth. The values 160 165 170 115 180 175