Analyses of the genetic structure of Sargassum horneri in the Yellow Sea: implications of the temporal and spatial relations among floating and benthic populations

2017 ◽  
Vol 30 (2) ◽  
pp. 1417-1424 ◽  
Author(s):  
Li Su ◽  
Tifeng Shan ◽  
Shaojun Pang ◽  
Jing Li
Keyword(s):  
Genetic Structure ◽  
Yellow Sea ◽  
Spatial Relations ◽  
Sargassum Horneri ◽  
The Yellow Sea ◽  
Temporal And Spatial

scholarly journals A barrier to gene flow in the Asian paddle crab, Charybdis japonica, in the Yellow Sea

2015 ◽  
Vol 72 (5) ◽  
pp. 1440-1448 ◽  
Author(s):  
Zhiqiang Han ◽  
Wei Zheng ◽  
Wenbin Zhu ◽  
Cungen Yu ◽  
Bonian Shui ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Yellow Sea ◽  
Population Expansion ◽  
The Yellow Sea ◽  
Northwestern Pacific ◽  
Factors Affecting ◽  
Haizhou Bay ◽  
Coastal Species ◽  
Charybdis Japonica

Abstract Three primary factors affecting genetic patterns of marine species in the Northwestern Pacific Ocean have been proposed: isolation and population expansion during Pleistocene glacial cycles, ocean currents facilitating the gene flow, and the Yangtze River outflow imposing a physical barrier to gene flow. Here, we examined these factors affecting population structuring of the Asian paddle crab, Charybdis japonica, in the Yellow Sea, East China Sea, and adjacent areas. Genetic variation in nine populations of C. japonica (n = 169) was determined from partial mitochondrial cytochrome c oxidase subunit I sequences. Among the 14 haplotypes identified, a dominant haplotype H1 was present in all populations, and a relatively abundant localized haplotype H2 was found in four of the northern populations. Furthermore, the frequency of the common haplotype H1 decreased from south to north. A genetic discontinuity was detected in Haizhou Bay, which divided species into two groups (north group and south group). The lack of genetic structure in the south and north groups indicates high dispersal of C. japonica within groups. Local marine gyres in Haizhou Bay might be responsible for the divergence of the north and south groups. Our study highlights the importance of local marine gyres for influencing genetic structure in marine coastal species in the Northwestern Pacific, especially in species spawning inshore.

scholarly journals Determination of dissolved nitric oxide in coastal waters of the Yellow Sea off Qingdao

2017 ◽  
Author(s):  
Chun-Ying Liu ◽  
Wei-Hua Feng ◽  
Ye Tian ◽  
Gui-Peng Yang ◽  
Pei-Feng Li ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Detection Limit ◽  
Coastal Waters ◽  
Yellow Sea ◽  
The Yellow Sea ◽  
No Production ◽  
Spatial Distributions ◽  
Production Rates ◽  
Temporal And Spatial

Abstract. We developed a new method for the determination of dissolved nitric oxide (NO) in discrete seawater samples based on a combination of a purge-and-trap set-up and fluorometric detection of NO. 2,3-diaminonaphthalene (DAN) reacts with NO in seawater to form the highly fluorescent 2,3-naphthotriazole (NAT). The fluorescence intensity was linear for NO concentrations in the range from 0.14 nmol L−1 to 19 nmol L−1. We determined a detection limit of 0.068 nmol L−1, an average recovery coefficient of 83.8 % (80.2–90.0 %), and a relative standard deviation of ±7.2 %. With our method we determined for the first time the temporal and spatial distributions of NO surface concentrations in coastal waters of the Yellow Sea off Qingdao and in Jiaozhou Bay during a cruise in November 2009. The concentrations of NO varied from below the detection limit to 0.50 nmol L−1 with an average of 0.26 ± 0.14 nmol L−1. NO surface concentrations were generally enhanced significantly during daytime implying that NO formation processes such as NO2− photolysis are much higher during daytime than chemical NO consumption which, in turn, lead to a significant decrease of NO concentrations during nighttime. In general, NO surface concentrations and measured NO production rates were higher compared to previously reported measurements. This might be caused by the high NO2− surface concentrations encountered during the cruise. Moreover, additional measurements of NO production rates implied that the occurrence of particles and a temperature increase can enhance NO production rates. With the method introduced here we have a reliable and comparably easy to use method at hand to measure oceanic NO surface concentrations which can be used to decipher both its temporal and spatial distributions as well as its biogeochemical pathways in the oceans.

scholarly journals Temporal and spatial scales of the Yellow Sea thermal variability

1997 ◽  
Vol 102 (C3) ◽  
pp. 5655-5667 ◽  
Author(s):  
Peter C. Chu ◽  
Susan K. Wells ◽  
Steven D. Haeger ◽  
Carl Szczechowski ◽  
Michael Carron
Keyword(s):  
Yellow Sea ◽  
Spatial Scales ◽  
The Yellow Sea ◽  
Temporal And Spatial ◽  
Thermal Variability

The temporal and spatial variability of the Yellow Sea Cold Water Mass in the southeastern Yellow Sea, 2009–2011

2013 ◽  
Vol 32 (9) ◽  
pp. 1-10 ◽  
Author(s):  
Kyung-Hee Oh ◽  
Seok Lee ◽  
Kyu-Min Song ◽  
Heung-Jae Lie ◽  
Young-Taeg Kim
Keyword(s):  
Spatial Variability ◽  
Yellow Sea ◽  
Water Mass ◽  
Cold Water ◽  
The Yellow Sea ◽  
Cold Water Mass ◽  
Temporal And Spatial Variability ◽  
Temporal And Spatial

Temporal and spatial variations of dimethylsulfoxide in the Bohai Sea and the Yellow Sea

2014 ◽  
Vol 90 ◽  
pp. 33-43 ◽  
Author(s):  
Gui-Peng Yang ◽  
Xin Wang ◽  
Hong-Hai Zhang ◽  
Chun-Ying Liu
Keyword(s):  
Yellow Sea ◽  
Bohai Sea ◽  
Spatial Variations ◽  
The Yellow Sea ◽  
Temporal And Spatial Variations ◽  
The Bohai Sea ◽  
Temporal And Spatial
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