SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Regulation of protist grazing on bacterioplankton by hydrological conditions in coastal waters
Li, Xiangfu; Xu, Jie1; Shi, Zhen; Xu, Dapeng2; Li, Ruihuan; Li, Qian; Liu, Hongbin3
2019
Source PublicationESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
Volume218Pages:1
AbstractA series of dilution experiments were conducted along an environmental gradient in coastal waters during April to September 2016, in order to examine the regulation of protist grazing on bacterioplankton by physical processes. Our results suggested that the density gradient in the frontal zone and the pycnocline played a significant role in regulating protist grazing on bacterioplankton in marine environments. The highest bacterial growth rate (1.33 d(-1)) and grazing rate (1.05 d(-1)) occurred in the frontal zone along the inshore-offshore transect and in the deep chlorophyll maximum (DCM) that always matched with the pycnocline in terms of the vertical profile in offshore waters. Spatial variability in bacterial growth rate and grazing rate was related to the presence of the density gradient in the front and the DCM. The density gradient aggregated phytoplankton and bacterial cells, enhancing their biomass. Meanwhile, high phytoplankton biomass provided more labile organic carbon to bacterioplankton in the front and the DCM, improving bacterial growth. Hence, the density gradient improved bacterial abundance, consequently enhancing the efficiency of protist grazing. Our findings implied that the density gradient improved bacterial carbon converted to high trophic levels and altered carbon flow in microbial food web in marine environments.
DepartmentLTO
KeywordProtist grazing Bacterioplankton Front Deep chlorophyll maximum layer Density gradient The northern south China sea
DOI10.1016/j.ecss.2018.11.013
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17750
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Xiamen Univ, Coll Ocean & Earth Sci, Inst Marine Microbes & Ecosphere, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China
4.Hong Kong Univ Sci & Technol, Div Life Sci, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Li, Xiangfu,Xu, Jie,Shi, Zhen,et al. Regulation of protist grazing on bacterioplankton by hydrological conditions in coastal waters[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2019,218:1, 8.
APA Li, Xiangfu.,Xu, Jie.,Shi, Zhen.,Xu, Dapeng.,Li, Ruihuan.,...&Liu, Hongbin.(2019).Regulation of protist grazing on bacterioplankton by hydrological conditions in coastal waters.ESTUARINE COASTAL AND SHELF SCIENCE,218,1.
MLA Li, Xiangfu,et al."Regulation of protist grazing on bacterioplankton by hydrological conditions in coastal waters".ESTUARINE COASTAL AND SHELF SCIENCE 218(2019):1.
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