2019 Volume 42 Issue 4 Pages 177-184
Spectral analyses [UV absorbance:dissolved organic carbon (DOC) ratios, three-dimensional excitation emission matrix (3DEEM) ] and chemical analysis (fatty acid analysis) were carried out to investigate the characteristics of organic matter in and around Isahaya Bay regulating reservoir. As a result, it was revealed that soil-derived organic matter was the dominant source of dissolved organic matter (DOM) in and around the area. It was also shown that protein and humic substances were components of labile DOM and refractory DOM, respectively. In terms of particulate organic matter (POM) , fatty acid analysis indicated that organic matter derived from phytoplankton was the main source of labile POM. In addition, organic matter from terrestrial plants were most likely to be more refractory than that from phytoplankton.
