Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea

	Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea
	Chen, Bingzhang 1; Liu, Hongbin 1,2; Landry, Michael R.3; Dai, Minhan 4; Huang, Bangqin 4; Sun, Jun 5
	2009-07-01
发表期刊	LIMNOLOGY AND OCEANOGRAPHY
ISSN	0024-3590
卷号	54 期号:4 页码:1084-1097
文章类型	Article
摘要	We conducted 28 dilution experiments during August-September 2007 to investigate the coupling of growth and microzooplankton grazing rates among ultraphytoplankton populations and the phytoplankton community and their responses to habitat variability (open-ocean oligotrophy, eddy-induced upwelling, and the Mekong River plume) in the western South China Sea. At the community level, standing stocks, growth, and grazing rates were strongly and positively correlated, and were related to the higher abundance of larger phytoplankton cells (diatoms) at stations with elevated chlorophyll concentration. Phytoplankton growth rates were highest (> 2 d(-1)) within an eastward offshore jet at 13 degrees N and at a station influenced by the river plume. Among ultraphytoplankton populations, Prochlorococcus dominated the more oceanic and oligotrophic stations characterized by generally lower biomass and phytoplankton community growth, whereas Synechococcus became more important in mesotrophic areas (eddies, offshore jet, and river plume). The shift to Synechococcus dominance reflected, in part, its higher growth rates (0.87 +/- 0.45 d(-1)) compared to Prochlorococcus (0.65 +/- 0.29 d(-1)) or picophytoeukaryotes (0.54 +/- 0.50 d(-1)). However, close coupling of microbial mortality rates via common predators is seen to play a major role in driving the dominance transition as a replacement of Prochlorococcus, rather than an overprinting of its steady-state standing stock.; We conducted 28 dilution experiments during August-September 2007 to investigate the coupling of growth and microzooplankton grazing rates among ultraphytoplankton populations and the phytoplankton community and their responses to habitat variability (open-ocean oligotrophy, eddy-induced upwelling, and the Mekong River plume) in the western South China Sea. At the community level, standing stocks, growth, and grazing rates were strongly and positively correlated, and were related to the higher abundance of larger phytoplankton cells (diatoms) at stations with elevated chlorophyll concentration. Phytoplankton growth rates were highest (> 2 d(-1)) within an eastward offshore jet at 13 degrees N and at a station influenced by the river plume. Among ultraphytoplankton populations, Prochlorococcus dominated the more oceanic and oligotrophic stations characterized by generally lower biomass and phytoplankton community growth, whereas Synechococcus became more important in mesotrophic areas (eddies, offshore jet, and river plume). The shift to Synechococcus dominance reflected, in part, its higher growth rates (0.87 +/- 0.45 d(-1)) compared to Prochlorococcus (0.65 +/- 0.29 d(-1)) or picophytoeukaryotes (0.54 +/- 0.50 d(-1)). However, close coupling of microbial mortality rates via common predators is seen to play a major role in driving the dominance transition as a replacement of Prochlorococcus, rather than an overprinting of its steady-state standing stock.
关键词	Microbial Community Structure Flow-cytometric Analyses Equatorial Pacific Mesoscale Eddy North Pacific Prochlorococcus Waters Picoplankton Variability Surface
学科领域	Limnology ; Oceanography
收录类别	SCI
语种	英语
WOS记录号	WOS:000268325100006
引用统计	被引频次：83[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2598
专题	海洋生态与环境科学重点实验室
作者单位	1.Hong Kong Univ Sci & Technol, AMCE Program, Hong Kong, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Biol, Hong Kong, Hong Kong, Peoples R China 3.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA 4.Xiamen Univ, Environm Sci Res Ctr, State Key Lab Marine Environm Sci, Xiamen, Fujian, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Chen, Bingzhang,Liu, Hongbin,Landry, Michael R.,et al. Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea[J]. LIMNOLOGY AND OCEANOGRAPHY,2009,54(4):1084-1097.
APA	Chen, Bingzhang,Liu, Hongbin,Landry, Michael R.,Dai, Minhan,Huang, Bangqin,&Sun, Jun.(2009).Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea.LIMNOLOGY AND OCEANOGRAPHY,54(4),1084-1097.
MLA	Chen, Bingzhang,et al."Close coupling between phytoplankton growth and microzooplankton grazing in the western South China Sea".LIMNOLOGY AND OCEANOGRAPHY 54.4(2009):1084-1097.

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