Phytoplankton dynamics in and near the highly eutrophic Pearl River Estuary, South China Sea

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	Phytoplankton dynamics in and near the highly eutrophic Pearl River Estuary, South China Sea
	Qiu, DJ; Huang, LM; Zhang, JL; Lin, SJ; djqiu@scsio.ac.cn; hlm@scsio.ac.cn; jlzhang@scsio.ac.cn; senjie.lin@uconn.edu
刊名	CONTINENTAL SHELF RESEARCH
	2010
卷号	30 期号:2 页码:177-186
关键词	Phytoplankton Dynamics Eutrophication Coastal Zone China Pearl River Estuary
ISSN号	0278-4343
英文摘要	The dynamics of size-fractionated phytoplankton along the salinity gradient in the Pearl River Estuary and the adjacent near-shore oceanic water was investigated using microscopic, flow cytometric, and chlorophyll analyses in the early spring (March) and early autumn (September) of 2005. In the inner part of the estuary where salinity was less than 30, the phytoplankton community was dominated by micro- and nano-sized (3-200 mu m) cells, particularly the diatom Skeletonema costatum, both in early spring and early autumn. In areas where salinity > 30, including the mixing zone and nearshore oceanic water, micro- and nano-sized cell populations dominated the phytoplankton assemblage during early spring when influence of river discharge was minimal, whereas pico-sized (<= 3 mu m) cell populations were dominant during early autumn as a result of strong river discharge in the summer, with Synechococcus and pico-eukaryotes being predominant. Picophytoplankton were two orders of magnitude more abundant in early autumn (10(6) cells mL(-1)) than in early spring in the nearshore oceanic water. Nutrients delivered by freshwater input to the estuary were pushed toward high salinity (> 30) areas as a result of short residence time, exerting a strong influence on phytoplankton abundance, especially picophytoplankton in the nearshore, otherwise oligotrophic, water. Influenced by high abundance of DIN and limitation in phosphorus, picophytoplankton in the adjacent nearshore oceanic water rose to prominence seasonally. Our results indicate that eutrophication in the Pearl River Estuary not only stimulates the growth of S. costatum in the nutrient-rich areas of the estuary but also appears to promote the growth of Synechococcus and pico-eukaryotes in the adjacent usually oligotrophic oceanic water at least during our autumn cruise. (C) 2009 Elsevier Ltd. All rights reserved.
学科主题	Oceanography
URL标识	查看原文
资助项目	LMB
WOS记录号	WOS:000274993700006
公开日期	2011-07-02
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/3898]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
通讯作者	djqiu@scsio.ac.cn; hlm@scsio.ac.cn; jlzhang@scsio.ac.cn; senjie.lin@uconn.edu
推荐引用方式 GB/T 7714	Qiu, DJ,Huang, LM,Zhang, JL,et al. Phytoplankton dynamics in and near the highly eutrophic Pearl River Estuary, South China Sea[J]. CONTINENTAL SHELF RESEARCH,2010,30(2):177-186.
APA	Qiu, DJ.,Huang, LM.,Zhang, JL.,Lin, SJ.,djqiu@scsio.ac.cn.,...&senjie.lin@uconn.edu.(2010).Phytoplankton dynamics in and near the highly eutrophic Pearl River Estuary, South China Sea.CONTINENTAL SHELF RESEARCH,30(2),177-186.
MLA	Qiu, DJ,et al."Phytoplankton dynamics in and near the highly eutrophic Pearl River Estuary, South China Sea".CONTINENTAL SHELF RESEARCH 30.2(2010):177-186.