Establishment of a new chemical risk assessment system for primary producers using tropical coral and algae

2016 Fiscal Year Final Research Report

• Project/Area Number: 26281048
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental risk control and evaluation
• Research Institution: Ehime University
• Principal Investigator: TAKEUCHI Ichiro 愛媛大学, 農学研究科, 教授 (30212020)
• Co-Investigator(Kenkyū-buntansha): 冨永 伸明 有明工業高等専門学校, その他部局等, 教授 (30227631) ; 高橋 真 愛媛大学, 農学部, 准教授 (30370266) ; 高山 弘太郎 愛媛大学, 農学部, 准教授 (40380266) ; 治多 伸介 愛媛大学, 農学部, 教授 (60218659)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 環境 / リスク評価 / 環境化学物質 / 基礎生産者 / サンゴ

Outline of Final Research Achievements

We developed a rearing system for hard-coral and Halimeda spp. (green macroalga) using LED light and artificial seawater in the laboratory. We used this system for ecotoxicolgical studies on Acropora spp. (hard-coral) exposed to low concentrations of Irgarol 1051 and Diuron (1 and 10 μg/L). Measurement of RGB values (R, red; G, green; B, blue) and delayed fluorescence using a high sensitivity luminometer showed that Irgarol 1051 is more toxic to Acropora spp. than Diuron. Exposure to Irgarol 1051 at the concentrations used induced loss of body colour in Acropora, and bleaching within 2 weeks. The RNA-seq analysis revealed the potential for up- and down-regulated genes in Acropora tenuis by exposure to these herbicides.

Free Research Field

生態系保全学、環境毒性学