Journal of Tropical Oceanography >
Preliminary investigation on the bacteria diversity coupled with the monsoon forced circulation in the South China Sea
Received date: 2017-11-29
Online published: 2018-12-24
Supported by
National Natural Science Foundation of China (41230962)
Copyright
Ocean dynamic processes in the South China Sea driven by the monsoon are characterized by seasonal and multi-scale variations, which have significant impacts on the evolution of marine ecosystems. Marine bacteria, as an important component of material cycle and energy flow in marine ecosystems, have active responses to the environmental changes associated with multi-scale dynamic processes. The interdisciplinary research on microbial community structures, their dynamic variation and associated physical processes is one of the hot issues in marine sciences, which combines marine microbiology, microbial ecology and physical oceanography. Based on the primary results of the Key Research Program, "Study on bacteria diversity coupled with the monsoon circulation in the South China Sea and significance in microbial oceanography" supported by the National Natural Science Foundation of China, we discuss in this paper current research progress, including coastal upwelling, seasonal thermal fronts, mesoscale eddy, sub-mesoscale processes, and their potential impacts on the marine bacterial diversity and local ecosystem in the South China Sea.
LI Jie , JING Zhiyou , ZHANG Si . Preliminary investigation on the bacteria diversity coupled with the monsoon forced circulation in the South China Sea[J]. Journal of Tropical Oceanography, 2018 , 37(6) : 1 -15 . DOI: 10.11978/2017127
Fig. 1 Typical circulations in the South China Sea in winter (top) and summer (bottom), using AVISO altimeter data |
Fig. 2 Satellite observation (a); numerical simulation (b); in-situ observations (c, d), and analysis of water masses (e) for upwelling in the northern South China Sea. |
Fig. 3 South China Sea monsoon anomaly (a); atmospheric circulation anomalies in the western Pacific, South China Sea and East Indian Ocean (b) in the summer of 1998. |
Fig. 4 Map of water depths overlapped with CTD stations (dots). |
Fig. 5 Cluster analysis of the environmental elements at the sampling stations. |
Fig. 6 Bacterial diversity at 25 and 50 m along transect S1 (a) and at 50 m along transect S3 (b). |
Fig. 7 Bacterial community compositions at different depths of the sampling stations |
Fig. 8 Annual-mean SST gradients and wind speeds from Satellite observations (a); in-situ observations (b) and vertical structures of temperature and salinity in the representative sections (c-h) for the fronts in the northern South China Sea. |
Fig. 9 Distributions of sea level anomalies and geostrophic velocity anomalies during the cruise, overlapped with sampling stations |
The authors have declared that no competing interests exist.
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