[A-HW22] 流域圏生態系における物質輸送と循環：源流から沿岸海域まで

[AHW22-03] Effects of terrestrial water and material transport on blue carbon ecosystems in a coastal island scale

*齋藤 光代¹、小野寺 真一¹、濱田 麻友子²、兵藤 不二夫²、秋永 拓弥^3,4、Nguyen Nhat³、高 啓迪¹、松原 怜哉⁵ (1.広島大学 大学院先進理工系科学研究科 、2.岡山大学 環境生命自然科学学域、3.岡山大学 環境生命科学研究科、4.株式会社ニュージェック、5.広島大学 総合科学部)

キーワード：海底湧水、ブルーカーボン、沿岸生態系、流域

Seagrass-seaweed meadows (hereafter SSM) are regarded as an important coastal ecosystems with several ecosystem services, such as carbon capture (blue carbon). In this research, we aimed to examine the effect of terrestrial water and material transport on the blue carbon ecosystems in an island of Seto Inland Sea, western Japan. We succeeded in mapping the spatial distribution of SSM by the imagery analysis using UAV (Unmanned Aerial Vehicle; drone) including tidal flat areas and the evaluation of fish diversities applying environmental DNA technique. We confirmed that both river and submarine groundwater discharge (SGD) influcence on the spatial and temporal variation in SSM ecosystems as the pathways of water and materials from watersheds.