The spatial distribution of microplastic in the sands of a coral reef island in the South China Sea: Comparisons of the fringing reef and atoll

2019 ◽  
Vol 688 ◽  
pp. 780-786 ◽  
Author(s):  
Linlin Zhang ◽  
Shuaipeng Zhang ◽  
Yinghui Wang ◽  
Kefu Yu ◽  
Ruilong Li
Keyword(s):  
Spatial Distribution ◽  
Coral Reef ◽  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
Fringing Reef ◽  
China Sea

scholarly journals Diazotroph diversity associated with scleractinian corals and its relationships with environmental variables in the South China Sea

2019 ◽  
Author(s):  
Jiayuan Liang ◽  
Kefu Yu ◽  
Yinghui Wang ◽  
Xueyong Huang ◽  
Wen Huang ◽  
...  
Keyword(s):  
Coral Reef ◽  
South China Sea ◽  
Coral Reefs ◽  
South China ◽  
Human Activities ◽  
Environmental Variables ◽  
The South China Sea ◽  
The South ◽  
Fringing Reef ◽  
China Sea

Abstract Background: Coral reef ecosystems cannot operate normally without an effective nitrogen cycle. For oligotrophic coral reef areas, coral-associated diazotrophs are indispensable participants in the nitrogen cycle. How coral-associated diazotrophs will change in order to adapt to environmental changes resulting from global warming and human activities is a topic of concern for researchers. To this end, 68 colonies of scleractinian coral were collected from 6 coral reefs areas with different environmental variables in the South China Sea to investigate the composition of associated diazotrophs based on nifH gene amplification using high-throughput sequencing. The six coral reefs can be clearly divided into two types (fringing reefs and island reefs), are affected by varying degrees of human activities and are located at different latitudes from 9°20′06′′N to 22°34′55′′N with different seawater temperatures. Results: Alpha- and beta-diversity analyses showed that the distribution of diazotrophs among coral reefs exhibited greater geographical fluctuations than interspecific fluctuations. The predominant bacterial phyla included Proteobacteria, Chlorobi, Cyanobacteria, and two unclassified phyla. Chlorobi exhibited an abundance of 47–96% in coral samples from the high-latitude Daya Bay fringing reef affected by eutrophication. Unclassified bacteria II, with an abundance of 28–87%, was found in all coral samples from the midlatitude Luhuitou fringing reef affected by eutrophication. However, unclassified bacteria I and Proteobacteria dominated (> 80% abundance) in most of the coral samples from the Weizhou Island fringing reef, which is far from land, and three island reefs (Huangyan Island, Xinyi Reef, and Sanjiao Reef) at relatively low latitudes. At the genus level, some core diazotrophs were found in different coral sample groups. In addition, the correlation analysis with various environmental variables revealed that the variables correlated positively or negatively with different diazotrophic genera. Conclusions: We found that coral-associated diazotrophs were common among coral individuals. The presence of these diazotrophs was not affected by the external environment, but their population abundances were closely related to the different environmental variables. These results provide insights into the ecological characteristics of coral-associated diazotrophs and their relationships with critical environmental variables in the South China Sea.

Archaeal Diversity and Spatial Distribution in the Surface Sediment of the South China Sea

2013 ◽  
Vol 31 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Peng Wang ◽  
Yuli Wei ◽  
Tao Li ◽  
Fuyan Li ◽  
Jun Meng ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
South China Sea ◽  
South China ◽  
Surface Sediment ◽  
The South China Sea ◽  
Archaeal Diversity ◽  
The South ◽  
China Sea

scholarly journals Coral reef ecosystems in the South China Sea as a source of atmospheric CO2 in summer

2011 ◽  
Vol 56 (7) ◽  
pp. 676-684 ◽  
Author(s):  
HongQiang Yan ◽  
KeFu Yu ◽  
Qi Shi ◽  
YeHui Tan ◽  
HuiLing Zhang ◽  
...  
Keyword(s):  
Coral Reef ◽  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
Atmospheric Co2 ◽  
The South ◽  
China Sea ◽  
Coral Reef Ecosystems

Research progress on the Zhongnan-Liyue Fault Zone in the South China Sea Basin

2020 ◽  
Author(s):  
Ziying Xu ◽  
Jun Wang ◽  
Hongfang Gao ◽  
Yongjian Yao
Keyword(s):  
Spatial Distribution ◽  
South China Sea ◽  
Fault Zone ◽  
South China ◽  
The South China Sea ◽  
Magnetic Data ◽  
Tectonic Deformation ◽  
The South ◽  
China Sea ◽  
The North

<p>We give a review of the up-to-date research situation about The Zhongnan-Liyue Fault Zone (ZLFZ), than analyze the spatial distribution and tectonic deformation feature of the ZLFZ based on the geophysical data including topographic, seismic, gravity and magnetic data. The results show that the ZLFZ has obvious north-south segmentation characteristics in in the South China Sea Basin. The north section, which is between northwest sub-basin and east sub-basin, is a narrow zone with the width of ~16 km, and is NNW trend from 18°N,115.5°E to 17.5°N,116°E. Meanwhile ,the south section, which is between southwest sub-basin and east sub-basin, is a wide zone with the width of 60-80 km, and is NNW trend from the east of ZhongshaBank to the west of LiyueBank. The main fault of the ZLFZ is NNW trend along the seamounts ridge of Zhongnan. the ZLFZ of transition region is NNE trend from the north section to the south section. According the sub-basin’s sedimentary thickness and oceanic crust thickness exist obvious difference, on both sides of the ZLFZ, we speculate that the ZLFZ play an important role on geological structure of sub-basin. According to the chang of crustal structure, We speculate that the ZLFZ is at least a crustal fracture zone.</p><p><strong>Key words: </strong>South China Sea Basin; Zhongnan-Liyue Fault Zone; Spatial distribution; Tectonic deformation<strong> </strong></p><p><strong>Foundation item:</strong> National Natural Science Foundation of China (41606080, 41576068); The China Geological Survey Program (GZH201400202, 1212011220117, DD20160138, 1212011220116).</p>

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