Ecological risk assessment for a couple of herbicides to eelgrass (Zostera marina)

2016 Fiscal Year Final Research Report

• Project/Area Number: 26450252
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: Fisheries Research and Education Agency
• Principal Investigator: MOCHIDA KAZUHIKO 国立研究開発法人水産研究・教育機構, 瀬戸内海区水産研究所, グループ長 (00371964)
• Co-Investigator(Renkei-kenkyūsha): KUWAHARA Ryuji 国立研究開発法人水産研究・教育機構, 瀬戸内海区水産研究所, 環境保全研究センター長 (10416026) ; ITO Katsutoshi 国立研究開発法人水産研究・教育機構, 瀬戸内海区水産研究所, 主任研究員 (80450782)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 代謝物総体解析 / 最大量子収率 / クロロフィル量 / イルガロール

Outline of Final Research Achievements

Eelgrass (Zostera marina) is the commonest species of seagrass beds that are an important component of many coastal marine environments. Toxicity of an antifouling biocide, or agricultural chemicals that act as herbicide with various mechanism of action to eelgrass were examined using the leaf growth and potential quantum yield as endpoints. Herbicides, that inhibit photosynthetic activity, exhibited the strongest toxicity, comparing to herbicides with other mechanism of action. Considering the detected concentrations of these herbicides in the Seto Inland sea, it is suggested that ecological risk of herbicides with the photosynthesis inhibiting activity to eelgrass is higher than those with other mechanism of action. Metabolome analysis for a herbicide (Irgarol 1051)-exposed eelgrass revealed that decrease in sugars, such as sucrose, and increment of amino acids occurred. This phenomenon is considered to be compensation for loss of metabolic energy due to the decrease in sugars.

Free Research Field

生態毒性学