scholarly journals Horizontal distribution and natural resource of seagrass in brackish Lake Obuchi, Aomori Prefecture, Japan

2006 ◽  
Vol 67 (2) ◽  
pp. 113-121 ◽  
Author(s):  
Shinji UEDA ◽  
Yuki CHIKUCHI ◽  
Kunio KONDO
Keyword(s):  
Natural Resource ◽  
Horizontal Distribution ◽  
Brackish Lake ◽  
Aomori Prefecture

scholarly journals Occurrence characteristics of zooplankton in brackish Lake Obuchi, Aomori Prefecture, Japan

2004 ◽  
Vol 65 (3) ◽  
pp. 215-223
Author(s):  
Yuki CHIKUCHI ◽  
Shinji UEDA ◽  
Kunio KONDO ◽  
Yasushi SEIKE ◽  
Osamu MITAMURA
Keyword(s):  
Brackish Lake ◽  
Occurrence Characteristics ◽  
Aomori Prefecture

scholarly journals Grain size distribution and chemistry of the brackish Lake sediment in Korea

2020 ◽  
Vol 26 (5) ◽  
pp. 200365-0
Author(s):  
I Chan Shin ◽  
Tetsuji Akatsuka ◽  
Hisayuki Azumi ◽  
Lan Ao ◽  
Nozomi Amahashi ◽  
...  
Keyword(s):  
Grain Size ◽  
Size Distribution ◽  
Grain Size Distribution ◽  
Horizontal Distribution ◽  
Eastern Coast ◽  
Bottom Surface ◽  
Lake Area ◽  
Brackish Lake ◽  
Grain Size Distributions ◽  
The Vertical Distribution

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 δ<sup>13</sup>C and high δ<sup>15</sup>N 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 δ<sup>13</sup>C and low δ<sup>15</sup>N sediments in Lake Hwajinpo were likely to be influenced by cyanobacteria.

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