Distribution characteristics and risk assessment of polyhalogenated carbazoles in sea water of the Yellow Sea

2020 ◽  
Vol 161 ◽  
pp. 111656
Author(s):  
Zengmei Li ◽  
Xiaoyu Fan ◽  
Yingdi Mu ◽  
Ling Wang ◽  
Jingyun Liang ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Yellow Sea ◽  
Sea Water ◽  
The Yellow Sea ◽  
Distribution Characteristics

Bacillus hwajinpoensis sp. nov. and an unnamed Bacillus genomospecies, novel members of Bacillus rRNA group 6 isolated from sea water of the East Sea and the Yellow Sea in Korea

2004 ◽  
Vol 54 (3) ◽  
pp. 803-808 ◽  
Author(s):  
Jung-Hoon Yoon ◽  
In-Gi Kim ◽  
Kook Hee Kang ◽  
Tae-Kwang Oh ◽  
Yong-Ha Park
Keyword(s):  
16S Rdna ◽  
Yellow Sea ◽  
Sea Water ◽  
Diaminopimelic Acid ◽  
East Sea ◽  
The Yellow Sea ◽  
Phenotypic Properties ◽  
Rdna Sequences ◽  
16S Rdna Sequences ◽  
Group 6

Two Gram-positive or -variable, endospore-forming, slightly halophilic strains (SW-72T and SW-93) were isolated from sea water of the East Sea and the Yellow Sea in Korea, respectively, and subjected to polyphasic taxonomic study. Both strains had cell-wall peptidoglycan that was based on meso-diaminopimelic acid and MK-7 as the predominant menaquinone. The two strains contained large amounts of saturated and branched fatty acids, with anteiso-C15 : 0 as the major fatty acid. The DNA G+C contents of strains SW-72T and SW-93 were 40·9 and 41·0 mol%, respectively. Phylogenetic analysis based on 16S rDNA sequences showed that strains SW-72T and SW-93 fall within the radiation of the cluster that comprises members of the genus Bacillus, particularly Bacillus rRNA group 6. There were five nucleotide differences between the 16S rDNA sequences of strains SW-72T and SW-93. The mean level of DNA–DNA relatedness between strains SW-72T and SW-93 was 21·5 %. Strains SW-72T and SW-93 showed 93·1–95·2 % 16S rDNA sequence similarity to the type strains of Bacillus species that are assigned to rRNA group 6. Strains SW-72T and SW-93 could not be differentiated clearly by using their phenotypic properties. On the basis of phenotypic properties, phylogeny and genomic data, it is proposed that strain SW-72T (=KCCM 41641T=JCM 11807T) should be placed in the genus Bacillus as the type strain of a novel species, Bacillus hwajinpoensis sp. nov., and that strain SW-93 (=KCCM 41640=JCM 11806) should be placed in the genus Bacillus as an unnamed Bacillus genomospecies.

scholarly journals Sphingopyxis baekryungensis sp. nov., an orange-pigmented bacterium isolated from sea water of the Yellow Sea in Korea

2005 ◽  
Vol 55 (3) ◽  
pp. 1223-1227 ◽  
Author(s):  
Jung-Hoon Yoon ◽  
Choong-Hwan Lee ◽  
Soo-Hwan Yeo ◽  
Tae-Kwang Oh
Keyword(s):  
Fatty Acids ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Yellow Sea ◽  
Sea Water ◽  
The Yellow Sea ◽  
Rrna Gene ◽  
Phenotypic Properties ◽  
Orange Pigment ◽  
Taxonomic Approach

A Gram-negative, motile, slightly halophilic bacterial strain, SW-150T, was isolated from sea water of the Yellow Sea, Korea, and was characterized by a polyphasic taxonomic approach. Strain SW-150T grew optimally at 25–30 °C and in the presence of 2 % (w/v) NaCl. The isolate could be distinguished from other Sphingopyxis species in producing an orange pigment. It contained ubiquinone-10 as the predominant respiratory lipoquinone and C18 : 1 ω7c and C17 : 1 ω6c as the major fatty acids. No 3-hydroxy fatty acids were detected. Major polar lipids were sphingoglycolipid, diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The DNA G+C content was 63 mol%. Comparative 16S rRNA gene sequence analyses showed that strain SW-150T was phylogenetically affiliated to the genus Sphingopyxis of the family Sphingomonadaceae. Similarity values between the 16S rRNA gene sequences of strain SW-150T and the type strains of Sphingopyxis species ranged from 91·6 to 94·2 %, making it possible to categorize strain SW-150T as a species that is separate from previously described Sphingopyxis species. On the basis of phenotypic properties and phylogenetic distinctiveness, SW-150T (=KCTC 12231T=DSM 16222T) should be classified as the type strain of a novel Sphingopyxis species, for which the name Sphingopyxis baekryungensis sp. nov. is proposed.

scholarly journals Remotely-Observed Early Spring Warming in the Southwestern Yellow Sea Due to Weakened Winter Monsoon

2019 ◽  
Vol 11 (21) ◽  
pp. 2478 ◽  
Author(s):  
Xiangbai Wu ◽  
Qing Xu ◽  
Gen Li ◽  
Yuei-An Liou ◽  
Bin Wang ◽  
...  
Keyword(s):  
Green Algae ◽  
Yellow Sea ◽  
Sea Water ◽  
Submarine Canyon ◽  
Winter Monsoon ◽  
The Yellow Sea ◽  
Green Tide ◽  
Northerly Wind ◽  
Spring Warming ◽  
Sst Variability

The seasonal warming over the southwestern Yellow Sea (YS) in the spring is of vital importance to the local ecologic environment, especially to the massive green algae blooms of the YS in late spring and early summer. Based on daily optimum interpolation sea surface temperature (SST) data consisting of satellite derived SST from Advanced Very High Resolution Radiometer (AVHRR) and in situ measurements, this study analyzed the spring SST variation over the southwestern YS (SWYS) from 1982 to 2018. The results show that the recent warming trend of spring SST over the SWYS is four-to-six times that of the global average, and as a result, sea water over the Subei Shoal (SBS) shifts about 10–13 days earlier to reach 10 °C in early April. This implies that, accordingly, the micro-propagules of green algae over the SBS may have the chance to germinate earlier. SST variability in early April significantly correlates with northerly wind and exhibits a general warming over the SWYS with an intensified warming anchored along the axis of the submarine canyon off the Yangtze estuary. The Moderate Resolution Imaging Spectroradiometer (MODIS) red–green–blue composite images captured the intrusion of the Taiwan Warm Current (TWC) into the SWYS through the submarine canyon during northerly wind relaxation in early April. Ocean remote sensing provides important clues for understanding the regional SST variability in the SWYS. Following this clue, this study finds that the weakening of winter monsoon in the spring leads to northward migration of the TWC and results in enhanced spring warming over the SWYS. The attendant advanced warming in spring, resulting in a favorable temperature condition for early development of green alga, may have contributed to the green tide blooms in the Yellow Sea in the recent decade.

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