Impact of atmospheric wet deposition on phytoplankton community structure in the South China Sea

2016 ◽  
Vol 173 ◽  
pp. 1-8 ◽  
Author(s):  
Dong-Yang Cui ◽  
Jiang-Tao Wang ◽  
Li-Ju Tan ◽  
Ze-Yi Dong
Keyword(s):  
Community Structure ◽  
South China Sea ◽  
South China ◽  
Wet Deposition ◽  
Phytoplankton Community ◽  
The South China Sea ◽  
Phytoplankton Community Structure ◽  
The South ◽  
China Sea

Diversity and biogeography of picoplankton communities from the Straits of Malacca to the South China Sea

2020 ◽  
Vol 49 (1) ◽  
pp. 23-33
Author(s):  
Zhao-Yu Jiang ◽  
Fu-Lin Sun
Keyword(s):  
Community Structure ◽  
South China Sea ◽  
South China ◽  
Marine Ecosystem ◽  
The South China Sea ◽  
Rrna Genes ◽  
The South ◽  
China Sea ◽  
Open Sea ◽  
Straits Of Malacca

AbstractMarine picoplankton, including prokaryotic and eukaryotic picoplankton, drive many biogeochemical processes, such as carbon, nitrogen and sulfur cycles, making them crucial to the marine ecosystem. Despite the fact that picoplankton is prevalent, its diversity and spatial distribution from the Straits of Malacca (SM) to the South China Sea (SCS) remain poorly investigated. This work explores the phylogenetic diversity and community structure of picoplankton in relation to environmental factors from the SM to the SCS. To this end, the Illumina MiSeq sequencing technique was applied to 16S and 18S rRNA genes. The results showed significant differences in the dynamics of picoplankton between the open sea and the strait region. Proteobacteria and Cyanobacteria constituted a larger part of the prokaryotic group. Within Cyanobacteria, the abundance of Prochlorococcus in the open sea was significantly higher than that of Synechococcus, while the opposite trend was observed in the strait. Dinoflagellata, Cnidaria, Retaria, Tunicata, and Arthropoda dominated among the eukaryotic taxa. High-throughput sequencing data indicated that salinity, temperature and NO2-N were the key factors determining the prokaryotic community structure, while temperature and dissolved oxygen determined the eukaryotic community structure in the studied region. The network analysis demonstrated that the cooperation and competition were also important factors affecting the picoplankton community.

Community Structure of Archaea from Deep-Sea Sediments of the South China Sea

2010 ◽  
Vol 60 (4) ◽  
pp. 796-806 ◽  
Author(s):  
Peng Wang ◽  
Tao Li ◽  
Anyi Hu ◽  
Yuli Wei ◽  
Wenting Guo ◽  
...  
Keyword(s):  
Community Structure ◽  
South China Sea ◽  
South China ◽  
Deep Sea ◽  
The South China Sea ◽  
The South ◽  
China Sea ◽  
Deep Sea Sediments

scholarly journals Dynamics of phytoplankton community structure in the South China Sea in response to the East Asian aerosol input

2011 ◽  
Vol 8 (4) ◽  
pp. 6637-6680 ◽  
Author(s):  
C. Guo ◽  
J. Yu ◽  
T.-Y. Ho ◽  
B. Chen ◽  
L. Wang ◽  
...  
Keyword(s):  
Community Structure ◽  
South China Sea ◽  
Trace Metal ◽  
Atmospheric Deposition ◽  
South China ◽  
Phytoplankton Community ◽  
Aerosol Deposition ◽  
The South China Sea ◽  
China Sea ◽  
Aerosol Loading

Abstract. Recent studies have regarded atmospheric deposition as an increasingly important source of nutrients to the ocean. The South China Sea (SCS), where aerosol loading is among the highest in the world, however, is poorly studied particularly on the in situ changes of phytoplankton community structures in response to atmospheric deposition. By conducting a series of microcosm bioassays at different hydrographical locations and simulating different aerosol event scales, we observed both positive and negative responses induced by the input of East Asia (EA) aerosol with high nitrogen (N) and trace metal contents, in terms of both community structure and physiological characteristics of phytoplankton. High levels of aerosol loading profoundly relieved phytoplankton nitrogen and trace metal limitations in SCS, and thus increased total phytoplankton biomass, enhanced their physiological indicators (e.g. photosynthetic efficiency) and shifted phytoplankton assemblages from being dominated by picoplankton to microphytoplanton, especially diatoms. However, under low levels of aerosol loading, the composition shift and biomass accumulation were not apparent, suggesting that the stimulation effects might be counterbalanced by enhanced grazing mortality indicated by increased abundance of protist grazers. Trace metal toxicity of the aerosols was also an important negative factor to phytoplankton growth, especially picocyanobacteria, implicated by the high copper (Cu) concentration in the microcosm that surpassed the toxicity threshold of marine cyanobacteria. Moreover, the magnitude and duration of the deposition event, as well as the hydrographical and trophic conditions of receiving waters are also important factors when predicting the influence of an aerosol deposition event. Our results demonstrated that the EA aerosol deposition events could profoundly change nutrient and phytoplankton dynamics in SCS and highlighted the need for achieving an accurate comprehension of atmospheric nutrient on the biogeochemical cycles of the oceans.

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