Influence on biological production by the sea ice and the elucidation of the mechanism

2014 Fiscal Year Final Research Report

• Project/Area Number: 24580282
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: General fisheries
• Research Institution: Tokyo University of Agriculture
• Principal Investigator: YASUTO Nishino 東京農業大学, 生物産業学部, 准教授 (50424677)
• Co-Investigator(Kenkyū-buntansha): NAKAGAWA Yoshizumi 東京農業大学, 生物産業学部, 助教 (70399111) ; TANIGUCHI Akira 東京農業大学, 生物産業学部, 教授 (30002091)
• Research Collaborator: HAN Donfun
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 海氷 / アイスアルジー / プランクトン / クロロフィル / セディメントトラップ

Outline of Final Research Achievements

We conducted an investigation focus attention to fast ice in Lagoon Notoro-ko from 2013 to2015 during ice-covered season. As a result of this study, it were shown that high concentration of chlorophyll a was distributed in the water column during ice-covered season and the distribution pattern varied by a year. Although the total amount of chlorophyll a content in the sea-ice is relatively low, it is locally concentrated in and around the sea-ice. This suggests that the zone beneath the bottom layer of the sea-ice provides a suitable feeding environment for primary consumers inhabiting the water column, where ice algae is distributed in locally and densely as a food source. Namely, it was suggested that the sea ice makes primary production activate.

Free Research Field

生物海洋学