Transfer and transport of phosphorus and silica in the turbidity maximum zone of the Changjiang estuary

doi:10.1016/j.ecss.2008.01.010

	Transfer and transport of phosphorus and silica in the turbidity maximum zone of the Changjiang estuary
	Shen, Zhiliang 1; Zhou, Shuqing 2; Pei, Shaofeng 1
	2008-07-10
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	78 期号:3 页码:481-492
文章类型	Article
摘要	The concentration of suspended particulate matter (SPM), sedimentation flux, and various forms of phosphorus and silica in turbidity maximum zone (TMZ) in the Changjiang (Yangtze) estuary was studied. Based on the budget of P and Si, their mass balances in the TMZ were calculated. Results show that the variation in concentration of dissolved inorganic silicon (DISi) was mainly controlled by seawater dilution, while that of dissolved inorganic phosphor-us (DIP) was considerably affected by the buffering of suspended matter and sediment. Our experiments showed that the sedimentation fluxes of SPM and particulate inorganic phosphorus (PIP), total particulate phosphorus (TPP), particulate inorganic silicon (PISi), and biological silicon (BSi) in the TMZ were 238.4 g m(-2) d(-1) and 28.3, 43.1, 79.0, 63.0 mg m(-2) d(-1), respectively. In addition, a simple method to estimate the ratio of resuspension of sediment in the TMZ was established, with which the rate in surface and bottom waters of the TMZ accounted for 55.7 and 66.1% of the total SPM, respectively, indicating that the sediment resuspension in the TMZ influenced significantly the mass balances of P and Si. Particulate adsorbed P (60.8%) and 35.5% of total particulate P discharged from the river were filtered and then deposited in the TMZ. The input flux of PIP from the river mouth was 55.9% of that of DIP, being important as biologically available P, while that of PISi was only 3.5% of DISi, showing that particulate adsorbed Si was much less important than particulate adsorbed P. (c) 2008 Elsevier Ltd. All rights reserved.; The concentration of suspended particulate matter (SPM), sedimentation flux, and various forms of phosphorus and silica in turbidity maximum zone (TMZ) in the Changjiang (Yangtze) estuary was studied. Based on the budget of P and Si, their mass balances in the TMZ were calculated. Results show that the variation in concentration of dissolved inorganic silicon (DISi) was mainly controlled by seawater dilution, while that of dissolved inorganic phosphor-us (DIP) was considerably affected by the buffering of suspended matter and sediment. Our experiments showed that the sedimentation fluxes of SPM and particulate inorganic phosphorus (PIP), total particulate phosphorus (TPP), particulate inorganic silicon (PISi), and biological silicon (BSi) in the TMZ were 238.4 g m(-2) d(-1) and 28.3, 43.1, 79.0, 63.0 mg m(-2) d(-1), respectively. In addition, a simple method to estimate the ratio of resuspension of sediment in the TMZ was established, with which the rate in surface and bottom waters of the TMZ accounted for 55.7 and 66.1% of the total SPM, respectively, indicating that the sediment resuspension in the TMZ influenced significantly the mass balances of P and Si. Particulate adsorbed P (60.8%) and 35.5% of total particulate P discharged from the river were filtered and then deposited in the TMZ. The input flux of PIP from the river mouth was 55.9% of that of DIP, being important as biologically available P, while that of PISi was only 3.5% of DISi, showing that particulate adsorbed Si was much less important than particulate adsorbed P. (c) 2008 Elsevier Ltd. All rights reserved.
关键词	Phosphorus Silica Suspended Particulate Matter Transport Turbidity Maximum Zone China Changjiang (Yangtze) Estuary
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1016/j.ecss.2008.01.010
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000257084000003
引用统计	被引频次：65[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/337002/5374
专题	海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Shanghai Fishery Univ, Life Sci & Tech Coll, Shanghai 200090, 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	Shen, Zhiliang,Zhou, Shuqing,Pei, Shaofeng. Transfer and transport of phosphorus and silica in the turbidity maximum zone of the Changjiang estuary[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2008,78(3):481-492.
APA	Shen, Zhiliang,Zhou, Shuqing,&Pei, Shaofeng.(2008).Transfer and transport of phosphorus and silica in the turbidity maximum zone of the Changjiang estuary.ESTUARINE COASTAL AND SHELF SCIENCE,78(3),481-492.
MLA	Shen, Zhiliang,et al."Transfer and transport of phosphorus and silica in the turbidity maximum zone of the Changjiang estuary".ESTUARINE COASTAL AND SHELF SCIENCE 78.3(2008):481-492.

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