北海道の河川における河川水中の溶存鉄濃度の分布
白岩, 孝行;倉野, 健人;藤島, 洸;夏目, 奏;高宮, 良樹;張, 健;郭, 銘玉;牛, 潤華
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http://hdl.handle.net/2115/91807
JaLCDOI : 10.14943/lowtemsci.82.83
KEYWORDS : 溶存鉄; 湿地; 土地利用; 魚附き林; dissolved iron; wetland; land use; fish-breeding foresten
Abstract
The dissolved iron utilized in photosynthesis by phytoplankton in the surface layer of the ocean includes various sources, but a certain amount of the dissolved iron is supplied from rivers. In this study, focusing on rivers in Hokkaido, we elucidated how the dissolved iron concentration in river water changes over time and space in different land cover and land use conditions in the watershed. This was achieved through seasonal sampling and analysis at multiple locations. The results revealed that areas with wetlands in low-lying watersheds had higher dissolved iron concentrations, while watersheds dominated by mountain forests showed lower concentrations. On the other hand, it was found that dissolved iron of agricultural origin might also be present. Seasonally, the study confirmed previous research findings that dissolved iron concentrations increase during the summer.
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