On the abnormal low temperature phenomenon of the Yellow Sea bottom cold water in summer, 1981

2014 ◽  
Vol 119 (7) ◽  
pp. 4430-4443 ◽  
Author(s):  
Bin Wang ◽  
Naoki Hirose ◽  
Boonsoon Kang ◽  
Katsumi Takayama

Author(s):  
Jae-Sang Hong ◽  
Mi-Ra Park

Two species of the genus Eudorella (Crustacea: Cumacea) were collected and examined from the Yellow Sea. A new species and one new record of Eudorella are described and illustrated. This new species Eudorella hwanghaensis sp. nov. closely resembles E. intermedia, but it differs from the latter species in bearing a distinct apical spine of endopod with uropod peduncle. The distribution of the new species is confined to the central portion of the Yellow Sea, and its distributional range coincides well with that of the Yellow Sea Bottom Cold Water Mass. Eudorella pacifica is recorded for the first time in Korean waters. It occurred in shallow waters and was distributed widely on both coastal sides of the Yellow Sea.


2017 ◽  
Vol 73 (5) ◽  
pp. 701-709 ◽  
Author(s):  
Hye-Jin Moon ◽  
Han-Joon Kim ◽  
Chung-Ho Kim ◽  
Seonghoon Moon ◽  
Su-hwan Lee ◽  
...  

2014 ◽  
Vol 139 ◽  
pp. 119-127 ◽  
Author(s):  
Hee-Won Yang ◽  
Yang-Ki Cho ◽  
Gwang-Ho Seo ◽  
Sung Hyup You ◽  
Jang-Won Seo

Author(s):  
Young Ok Kim ◽  
Jungmin Choi ◽  
Kyung-Hee Oh ◽  
Dong Han Choi ◽  
Jae Hoon Noh ◽  
...  

2022 ◽  
Vol 10 (1) ◽  
pp. 56
Author(s):  
Hansoo Kim ◽  
Garam Kim ◽  
Mira Kim ◽  
Donhyug Kang

The Yellow Sea Bottom Cold Water (YSBCW) refers to seawater with a water temperature of 10 °C or less found at the bottom of the center of the Yellow Sea. The spatiotemporal variability of the YSBCW directly affects the distribution of organisms in the marine ecosystem. In this study, hydroacoustic and net surveys were conducted in April (spring) to understand the spatial distribution of the sound scattering layer (SSL) and estimate the density of Euphausia pacifica (E. pacifica) in the YSBCW. Despite the shallow water in the YSBCW region, E. pacifica formed an SSL, which was distributed near the bottom during the daytime; it showed a diel vertical migration (DVM) pattern of movement toward the surface during the nighttime. The mean upward and downward swimming speeds around sunset and sunrise were approximately 0.6 and 0.3–0.4 m/min, respectively. The E. pacifica density was estimated in the central, western, and eastern regions; the results were approximately 15.8, 1.3, and 10.3 g/m2, respectively, indicating significant differences according to region. The results revealed high-density distributions in the central and eastern regions related to the water temperature structure, which differs regionally in the YSBCW area. Additional studies are needed regarding the spatial distribution of E. pacifica in the YSBCW and its relationship with various ocean environmental parameters according to season. The results of this study contribute to a greater understanding of the structure of the marine ecosystem in the YSBCW.


Author(s):  
Ping Guo ◽  
Weiwei Xu ◽  
Shi Tang ◽  
Binxia Cao ◽  
Danna Wei ◽  
...  

One cold-adapted strain, named Planococcus sp. XW-1, was isolated from the Yellow Sea. The strain can produce biosurfactant with petroleum as sole source of carbon at low temperature (4 °C). The biosurfactant was identified as glycolipid-type biosurfactant species by thin-layer chromatography (TLC) and Fourier transform infrared spectroscopy (FTIR). It reduced the surface tension of water to 26.8 mN/m with a critical micelle concentration measurement of 60 mg/L. The produced biosurfactant possesses high surface activity at wide ranges of temperature (−18–105 °C), pH values (2–12), and salt concentrations (1–18%). The biosurfactant exhibited higher surface activity and higher growth rate of cells with hexadecane and diesel as carbon source. The strain Planococcus sp. XW-1 was also effective in degrading crude oil, after 21 days of growth at 4 °C in medium with 1% crude oil and 1% (v/v) bacteria broth, 54% of crude oil was degraded. The results suggest that Planococcus sp. XW-1 is a promising candidate for use in the bioremediation of petroleum-contaminated seawater in the Yellow Sea during winter. This study reported for the first time that Planococcus isolated from the Yellow Sea can produce biosurfactant using petroleum as the sole carbon source at low temperature (4 °C), showing its ecological role in the remediation of marine petroleum pollution.


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