Impact of costal water pollution for the calcification of marine organisms

2015 Fiscal Year Final Research Report

• Project/Area Number: 25740005
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: University of the Ryukyus
• Principal Investigator: Yasumoto Jun 琉球大学, 農学部, 助教 (70432870)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 海洋生物の石灰化機構 / 地下水 / 懸濁物質 / 栄養塩 / リン酸塩 / サンゴ

Outline of Final Research Achievements

In this study, we propose the new role of polyamine in calcification of marine organisms, and investigated that the effects of coastal pollution of nutrients on the skeleton formation of primary polyps for hard coral Acropora digitifera. As a result, the various types phosphate clearly inhibited the skeleton formation of primary polyp at low concentration. In contrast, nitrate did not inhibit the calcification of the primary polyp. And it was revealed that the costal groundwater and spring water in an agricultural region located in the southern part of Okinawa main Island contained relatively high concentration of phosphate and nitrate. Furthermore, the suspended solids in the groundwater adsorbed the various types phosphate supplies phosphate to the sea.

Free Research Field

農業土木学，地下水文学