JpGU-AGU Joint Meeting 2017

講演情報

[JJ] ポスター発表

セッション記号 A (大気水圏科学) » A-OS 海洋科学・海洋環境

[A-OS21] [JJ] 陸域と海洋をつなぐ水循環の物理過程

2017年5月22日(月) 15:30 〜 17:00 ポスター会場 (国際展示場 7ホール)

コンビーナ:木田 新一郎(九州大学・応用力学研究所)、山崎 大(海洋研究開発機構)、松村 義正(東京大学 大気海洋研究所)、山敷 庸亮(京都大学大学院総合生存学館)

[AOS21-P02] 地下水を経由したリン酸塩の海域への輸送がサンゴの生息環境に及ぼす影響

*安元 純1野崎 真司2安元 剛3廣瀬 美奈4飯島 真理子3 (1.琉球大学 農学部 地域農業工学科、2.琉球大学大学院 農学研究科、3.北里大学 海洋生命科学部、4.一般社団法人 トロピカルテクノプラス)

キーワード:リン、31P核磁気共鳴装置、地下水、サンゴ

Phosphorus, the main ingredient of fertilizer, is a limiting factor for sustainable primary production and is recognized as a major source for eutrophication of lakes, estuaries, and watersheds. Phosphorus in the water environment exists in various forms, and its transport form have been remained in many regions. Many sequential extraction methods have been proposed for morphological fractionation of phosphate in soil, but there are problems such as not being usable for morphological classification of polyphosphate and organic phosphorus. However, in recent years, One-dimensional (1D) solution 31P nuclear magnetic resonance spectroscopy (NMR) is currently the tool of choice for molecular-level characterization of organic P in soils 31P nuclear magnetic resonance spectroscopy (31P-NMR) as a morphological separation method of phosphorus in soil in fields such as soil fertilizer has been conducted. In this method, it is possible to classify phosphate in a form which was difficult to classify by the continuous extraction method.
In the present study, 31P-NMR and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) are used to understand a characteristic of the transport form of phosphate in soil and groundwater. In addition, we estimated the phosphorus load through groundwater to the coral reefs sea region of Okinawa through field measurement and numerical simulations, and investigated the effect of phosphate on in vivo skeleton formation of primary polyp for hard coral Acropora digitifera.