Phytoplankton biomass size structure and its regulation in the Southern Yellow Sea (China): Seasonal variability

doi:10.1016/j.csr.2009.08.010

	Phytoplankton biomass size structure and its regulation in the Southern Yellow Sea (China): Seasonal variability
	Fu, Mingzhu 1,2; Wang, Zongling 1; Li, Yan1 ; Li, Ruixiang 1; Sun, Ping 1; Wei, Xiuhua 1; Lin, Xuezheng 1; Guo, Jingsong 3
	2009-10-15
发表期刊	CONTINENTAL SHELF RESEARCH
ISSN	0278-4343
卷号	29 期号:18 页码:2178-2194
文章类型	Article
摘要	Phytoplankton size structure plays a significant role in controlling the carbon flux of marine pelagic ecosystems. The mesoscale distribution and seasonal variation of total and size-fractionated phytoplankton biomass in surface waters. as measured by chlorophyll a (Chl a), was studied in the Southern Yellow Sea using data from four cruises during 2006-2007. The distribution of Chl a showed a high degree of spatial and temporal variation in the study area. Chl a concentrations were relatively high in the summer and autumn, with a mean of 142 and 1.27 mg m(-3), respectively. Conversely, in the winter and spring. the average Chl a levels were only 098 and 0.99 mg m(-3) Total Chl a showed a clear decreasing gradient from coastal areas to the open sea in the summer, autumn and winter cruises. Patches of high Chl a were observed in the central part of the Southern Yellow Sea in the spring due to the onset of the phytoplankton bloom. The eutrophic coastal waters contributed at least 68% of the total phytoplankton biomass in the surface layer. Picophytoplankton showed a consistent and absolute dominance in the central region of the Southern Yellow Sea (>40%) in all of the cruises, while the proportion of microphytoplankton was the highest in coastal waters The relative proportions of pico- and nanophytoplankton decreased with total biomass, whereas the proportion of the micro-fraction increased with total biomass. Relationships between phytoplankton biomass and environmental factors were also analysed. The results showed that the onset of the spring bloom was highly dependent on water column stability. Phytoplankton growth was limited by nutrient availability in the summer due to the strong thermocline. The combined effects of P-limitation and vertical mixing in the autumn restrained the further increase of phytoplankton biomass in the Surface layer. The low phytoplankton biomass in winter was caused by vertical dispersion due to intense mixing. Compared with the availability of nutrients. temperature did not seem to cause direct effects on phytoplankton biomass and its size structure. Although interactions of many different environmental factors affected phytoplankton distributions. hydrodynamic conditions seemed to be the dominant factor. Phytoplankton size structure was determined mainly by the size-differential capacity in acquiring resource. Short time scale events, such as the spring bloom and the extension of Yangtze River plume, can have substantial influences, both on the total Chl a concentration and on the size structure of the phytoplankton. (C) 2009 Elsevier Ltd. All rights reserved.; Phytoplankton size structure plays a significant role in controlling the carbon flux of marine pelagic ecosystems. The mesoscale distribution and seasonal variation of total and size-fractionated phytoplankton biomass in surface waters. as measured by chlorophyll a (Chl a), was studied in the Southern Yellow Sea using data from four cruises during 2006-2007. The distribution of Chl a showed a high degree of spatial and temporal variation in the study area. Chl a concentrations were relatively high in the summer and autumn, with a mean of 142 and 1.27 mg m(-3), respectively. Conversely, in the winter and spring. the average Chl a levels were only 098 and 0.99 mg m(-3) Total Chl a showed a clear decreasing gradient from coastal areas to the open sea in the summer, autumn and winter cruises. Patches of high Chl a were observed in the central part of the Southern Yellow Sea in the spring due to the onset of the phytoplankton bloom. The eutrophic coastal waters contributed at least 68% of the total phytoplankton biomass in the surface layer. Picophytoplankton showed a consistent and absolute dominance in the central region of the Southern Yellow Sea (>40%) in all of the cruises, while the proportion of microphytoplankton was the highest in coastal waters The relative proportions of pico- and nanophytoplankton decreased with total biomass, whereas the proportion of the micro-fraction increased with total biomass. Relationships between phytoplankton biomass and environmental factors were also analysed. The results showed that the onset of the spring bloom was highly dependent on water column stability. Phytoplankton growth was limited by nutrient availability in the summer due to the strong thermocline. The combined effects of P-limitation and vertical mixing in the autumn restrained the further increase of phytoplankton biomass in the Surface layer. The low phytoplankton biomass in winter was caused by vertical dispersion due to intense mixing. Compared with the availability of nutrients. temperature did not seem to cause direct effects on phytoplankton biomass and its size structure. Although interactions of many different environmental factors affected phytoplankton distributions. hydrodynamic conditions seemed to be the dominant factor. Phytoplankton size structure was determined mainly by the size-differential capacity in acquiring resource. Short time scale events, such as the spring bloom and the extension of Yangtze River plume, can have substantial influences, both on the total Chl a concentration and on the size structure of the phytoplankton. (C) 2009 Elsevier Ltd. All rights reserved.
关键词	Phytoplankton Size-fractionated Chlorophyll a Southern Yellow Sea Seasonal Variation
学科领域	Oceanography
DOI	10.1016/j.csr.2009.08.010
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000271694100002
引用统计	被引频次：114[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/337002/2606
专题	海洋生态与环境科学重点实验室
作者单位	1.SOA, Inst Oceanog 1, Key Lab Sci & Engn Marine Ecol Environm, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.SOA, Inst Oceanog 1, Key Lab Marine Sci & Numer Modelling, Qingdao 266061, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Fu, Mingzhu,Wang, Zongling,Li, Yan,et al. Phytoplankton biomass size structure and its regulation in the Southern Yellow Sea (China): Seasonal variability[J]. CONTINENTAL SHELF RESEARCH,2009,29(18):2178-2194.
APA	Fu, Mingzhu.,Wang, Zongling.,Li, Yan.,Li, Ruixiang.,Sun, Ping.,...&Guo, Jingsong.(2009).Phytoplankton biomass size structure and its regulation in the Southern Yellow Sea (China): Seasonal variability.CONTINENTAL SHELF RESEARCH,29(18),2178-2194.
MLA	Fu, Mingzhu,et al."Phytoplankton biomass size structure and its regulation in the Southern Yellow Sea (China): Seasonal variability".CONTINENTAL SHELF RESEARCH 29.18(2009):2178-2194.

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