Top-down control of spring surface phytoplankton blooms by microzooplankton in the Central Yellow Sea, China

doi:10.1016/j.dsr2.2013.05.005

	Top-down control of spring surface phytoplankton blooms by microzooplankton in the Central Yellow Sea, China
	Sun, Jun 1,2; Feng, Yuanyuan 1,2; Zhou, Feng 3,4; Song, Shuqun 5; Jiang, Yan 5; Ding, Changlin 5; Sun, J
	2013-12-01
发表期刊	DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
ISSN	0967-0645
卷号	97 页码:51-60
文章类型	Article
摘要	Phytoplankton growth and microzooplankton grazing were studied during the 2007 spring bloom in Central Yellow Sea. The surveyed stations were divided to pre-bloom phase (Chl a concentration less than 2 mu g L-1), and bloom phase (Chl a concentration greater than 2 mu g L-1). Shipboard dilution incubation experiments were carried out at 19 stations to determine the phytoplankton specific growth rates and the specific grazing rates of microzooplankton on phytoplankton. Diatoms dominated in the phytoplankton community in surface waters at most stations. For microzooplankton, Myrionecta rubra and tintinnids were dominant, and heterotrophic dinoflagellate was also important in the community. Phytoplankton-specific growth rates, with an average of 0.60 +/- 0.19 d(-1), were higher at pre-bloom stations (average 0.62 +/- 0.17 d(-1)), and lower at the bloom stations (average 0.59 +/- 0.21 d(-1)), but the difference of growth rates between bloom and pre-bloom stations was not statistically significant (t test, p = 0.77). The phytoplankton mortality rate by microzooplankton grazing averaged 0.41 +/- 0.23 d(-1) at prebloom stations, and 0.58 +/- 031 d(-1) during the blooms. In contrast to the growth rates, the statistic difference of grazing rates between bloom and pre-bloom stations was significant (after removal of outliers, t test, p = 0.04), indicating the importance of the top-down control in the phytoplankton bloom processes. Average potential grazing efficiency on primary productivity was 66% at pre-bloom stations and 98% at bloom stations, respectively. Based on our results, the biomass maximum phase (bloom phase) was not the maximum growth rate phase. Both phytoplankton specific growth rate and net growth rate were higher in the pre-bloom phase than during the bloom phase. Microzooplankton grazing mortality rate was positively correlated with phytoplankton growth rate during both phases, but growth and grazing were highly coupled during the booming phase. There was no correlation between phytoplankton growth rate and cell size during the blooms, but they were positive correlated during the pre-bloom phase. Our results indicate that microzooplankton grazing is an important process controlling the growth of phytoplankton in spring bloom period in the Central Yellow Sea, particularly in the "blooming" phase. (C) 2013 Elsevier Ltd. All rights reserved.; Phytoplankton growth and microzooplankton grazing were studied during the 2007 spring bloom in Central Yellow Sea. The surveyed stations were divided to pre-bloom phase (Chl a concentration less than 2 mu g L-1), and bloom phase (Chl a concentration greater than 2 mu g L-1). Shipboard dilution incubation experiments were carried out at 19 stations to determine the phytoplankton specific growth rates and the specific grazing rates of microzooplankton on phytoplankton. Diatoms dominated in the phytoplankton community in surface waters at most stations. For microzooplankton, Myrionecta rubra and tintinnids were dominant, and heterotrophic dinoflagellate was also important in the community. Phytoplankton-specific growth rates, with an average of 0.60 +/- 0.19 d(-1), were higher at pre-bloom stations (average 0.62 +/- 0.17 d(-1)), and lower at the bloom stations (average 0.59 +/- 0.21 d(-1)), but the difference of growth rates between bloom and pre-bloom stations was not statistically significant (t test, p = 0.77). The phytoplankton mortality rate by microzooplankton grazing averaged 0.41 +/- 0.23 d(-1) at prebloom stations, and 0.58 +/- 031 d(-1) during the blooms. In contrast to the growth rates, the statistic difference of grazing rates between bloom and pre-bloom stations was significant (after removal of outliers, t test, p = 0.04), indicating the importance of the top-down control in the phytoplankton bloom processes. Average potential grazing efficiency on primary productivity was 66% at pre-bloom stations and 98% at bloom stations, respectively. Based on our results, the biomass maximum phase (bloom phase) was not the maximum growth rate phase. Both phytoplankton specific growth rate and net growth rate were higher in the pre-bloom phase than during the bloom phase. Microzooplankton grazing mortality rate was positively correlated with phytoplankton growth rate during both phases, but growth and grazing were highly coupled during the booming phase. There was no correlation between phytoplankton growth rate and cell size during the blooms, but they were positive correlated during the pre-bloom phase. Our results indicate that microzooplankton grazing is an important process controlling the growth of phytoplankton in spring bloom period in the Central Yellow Sea, particularly in the "blooming" phase. (C) 2013 Elsevier Ltd. All rights reserved.
关键词	Central Yellow Sea Phytoplankton Spring Bloom Microzooplankton Growth Rate Grazing Rate Dilution Method Top-down Control
学科领域	Oceanography
DOI	10.1016/j.dsr2.2013.05.005
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000328807800006
WOS关键词	GROWTH-RATE ; EQUATORIAL PACIFIC ; GRAZING IMPACT ; DILUTION TECHNIQUE ; COASTAL WATERS ; CHESAPEAKE BAY ; CHLOROPHYLL-A ; RATES ; SIZE ; CARBON
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：13[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/337002/16500
专题	海洋生态与环境科学重点实验室
通讯作者	Sun, J
作者单位	1.Tianjin Univ Sci & Technol, Coll Marine Sci & Engn, Tianjin 300457, Peoples R China 2.Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China 3.State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China 4.Zhejiang Univ, Dept Ocean Sci & Engn, Hangzhou 310058, Zhejiang, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jun,Feng, Yuanyuan,Zhou, Feng,et al. Top-down control of spring surface phytoplankton blooms by microzooplankton in the Central Yellow Sea, China[J]. DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,2013,97:51-60.
APA	Sun, Jun.,Feng, Yuanyuan.,Zhou, Feng.,Song, Shuqun.,Jiang, Yan.,...&Sun, J.(2013).Top-down control of spring surface phytoplankton blooms by microzooplankton in the Central Yellow Sea, China.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,97,51-60.
MLA	Sun, Jun,et al."Top-down control of spring surface phytoplankton blooms by microzooplankton in the Central Yellow Sea, China".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 97(2013):51-60.

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