[A-CG55] 沿岸海洋⽣態系─１．⽔循環と陸海相互作⽤

[ACG55-05] 若狭湾内の砂浜域における地下水湧出と食物網構造

*杉本 亮¹、角野 悠太¹、中島 壽視¹、富永 修¹ (1.福井県立大学海洋生物資源学部)

キーワード：地下水湧出、食物網、安定＆放射性同位体

Sandy beach is an important ecosystem for coastal fish as a nursery and feeding ground. Although groundwater supplies nutrients into the water column and contributes primary productivity, there is little evidence in relation to groundwater discharge and biological production in the sandy beach ecosystem. In this study, we conducted the simultaneous survey for (1) quantifying the groundwater discharge and associated nutrient transport, and (2) assessing the food web structure, at the sandy beach in central Wakasa Bay. In the presentation, we will show that groundwater discharge is a major source for nutrients in the beach and autochthonous organic matter such as benthic and pelagic phytoplankton sustained the production of mysid and juvenile of fishes.