共同研究報告書


研究区分 一般研究

研究課題

 季節海氷生態系伯次生産機構の構造と機能の解明
新規・継続の別 新規
研究代表者／所属 創価大学・工学部・環境共生工学科
研究代表者／職名 教授
研究代表者／氏名 田口哲

研究分担者／氏名／所属／職名
　
氏　　名
所　　属
職　　名

1

 服部寛 北海道東海大学 教授

2

 濱崎恒二 東京大学 准教授

3

 小幡光子 創価大学 助教

4

 本川正三 創価大学 大学院後期課程3年

5

 片山智代 創価大学 大学院後期課程1年

6

 西岡純 北大低温研 准教授

7

 的場澄人 北大低温研 助教

研究目的 Photoacclimation of ice algae community is one of the most distinct response to the low light intensity in the high latitude. Few detailed study has been made for the analyses of photosynthetic response characterized by the electron transport rate of Photosystem II because the methodology has not been established yet for the ice alage analysis. The methodology and experimental protocols are aimed to be established in the present study.
　　
研究内容・成果 Based on the methodology established in the preceding project funded in 2010， photosynthetic acclimation to low light regime was determined on the ice algal community developed well in the 2011fiscal year. In 2011 ice season of Saroma-ko Lagoon， the sea ice was well developed to about 50cm ice thickness. The bottom surface population of ice algae was collected to employ for the analysis of electron transport rate of Photosystem II. A succession in the photosynthetic acclimation in accordance with the development of sea ice was observed between 2010 and 2011 ice season. It may suggest that a full acclimation to the ice condition in Saroma-ko Lagoon requires more than 30 days.
　　
成果となる論文・学会発表等 Based on the methodology established during the preceding project funded in 2010 and 2011， the advancement of photoacclimation determined by the maximum fluorescence efficiency of Photosystem II in ice algae in Saroma-ko was identified between sea ice seasons in 2010 and 2011.

The most recent results have been either reported at the International Symposium held in National Institute of Polar Research in October 2011 or will be presented at the International Symposium in Monbetsu in February 2012 and the annual meeting of Oceangraphic Society of Japan in March 2012 as followed，

Takimoto， K.， M. Obata， S. Motokawa， and S. Taguchi (2011)
Proceedings of NIPR， Biology

Takimoto， K.， M. Obata， H. Saito， S. Motokawa， and S. Taguchi (2012)
Proceedings of Monbetsu International Symposium on Okhotsk Sea and Sea Ice

Takimoto， K.， M. Obata， S. Motokawa， and S. Taguchi (2012)
Abstract paper at the annual meeting of Oceangraphic Society of Japan