Grain size distribution and chemistry of the brackish Lake sediment in Korea
| Autor: | Sung Ae Yoon, Jun Kil Choi, Noriko Ishida, Hisayuki Azumi, Masahiro Maruo, Osamu Mitamura, Byung Mo Lee, Yashshi Seike, Akihiko Yagi, Young Woong Byeon, Lan Ao, Seung-Hyun Lee, I Chan Shin, Nozomi Amahashi, Naoshige Goto, Tetsuji Akatsuka, Maki Oyagi, Kwang-Jin Cho |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Environmental Engineering Research. 26:200365 |
| ISSN: | 2005-968X 1226-1025 |
| Popis: | To determine the grain size distribution and chemical characteristics of bottom surface sediments in shallow brackish lagoons, we studied sediment samples collected from the entire horizontal lake area and in vertical profiles from three stations in Lakes Youngrang and Hwajinpo, on the eastern coast of Korea. Vertical and horizontal grain size distributions of the bottom sediments indicated predominantly sand- and silt in both lakes. The vertical distribution of C/N ratios ranged from 6.14 to 11.92 in Lake Youngrang, and 6.74 to 12.34 in Lake Hwajinpo. The horizontal distribution of C/N ratios in Lake Youngrang ranged from 6.1 to 17.6, whereas they ranged from 4.4 to 12.1 in Lake Hwajinpo. C/N ratios showed locally different responses to the origin of allochthonous (partial region) and autochthonous (entire region) organic materials. Horizontally, bottom sediment with low δ13C and high δ15N in Lake Youngrang were likely to be influenced by autochthonous organic material derived from primary production, and would be affected by N inputs from sources. In contrast, high δ13C and low δ15N sediments in Lake Hwajinpo were likely to be influenced by cyanobacteria. |
| Databáze: | OpenAIRE |
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