Water quality responses to simulated flow and nutrient reductions in the Cape Fear River Estuary and adjacent coastal region, North Carolina

	Water quality responses to simulated flow and nutrient reductions in the Cape Fear River Estuary and adjacent coastal region, North Carolina
	Lin, J ; Xie, L ; Pietrafesa, LJ ; Xu, H ; Woods, W ; Mallin, MA ; Durako, MJ
刊名	ECOLOGICAL MODELLING
	2008
卷号	212 期号:40606 页码:200-217
关键词	water quality numerical modeling nutrient flux estuary cape fear river
ISSN号	0304-3800
通讯作者	jing_lin@ncsu.edu
中文摘要	In order to examine system responses to high river discharge events and nutrient loading variations from the drainage basin, a coupled three-dimensional hydrodynamic and water quality model was applied in the Cape Fear River Estuary (CFRE) and its adjacent coastal region. An empirical equation was introduced in the model to represent light limitation for phytoplankton growth due to chromophoric dissolved organic matter (CDOM). Model results show that in the upper to middle estuary, light limitation controls phytoplankton growth while in the lower estuary phytoplankton growth appears to be limited by light intensity during high flow periods, but by nutrient availability during low flow periods. In the coastal ocean, nutrient availability is usually the dominant limiting factor for primary production. Two sensitivity model tests were conducted to predict the system response to reductions in nutrient loading from the drainage basin. By reducing river discharge, the model results show that phytoplankton growth was enhanced within CFRE due to alleviated light limitation and increased residence time. More nutrients were consumed within the CFRE, and less were exported to the coastal region. By reducing nutrient concentrations at the head of the estuary chlorophyll a concentrations within the CFRE were decreased. Less nutrients were consumed within the CFRE, and only slightly less were exported to the coastal region. The supply of light limiting substances during high flow events acted against the effect of riverine nutrient enhancement on phytoplankton growth, creating a negative feedback mechanism. (c) 2007 Elsevier B.V. All rights reserved.
学科主题	Ecology
收录类别	SCI
原文出处	40643
WOS记录号	WOS:000254667500003
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/5372]
专题	南海海洋研究所_海洋生物
推荐引用方式 GB/T 7714	Lin, J,Xie, L,Pietrafesa, LJ,et al. Water quality responses to simulated flow and nutrient reductions in the Cape Fear River Estuary and adjacent coastal region, North Carolina[J]. ECOLOGICAL MODELLING,2008,212(40606):200-217.
APA	Lin, J.,Xie, L.,Pietrafesa, LJ.,Xu, H.,Woods, W.,...&Durako, MJ.(2008).Water quality responses to simulated flow and nutrient reductions in the Cape Fear River Estuary and adjacent coastal region, North Carolina.ECOLOGICAL MODELLING,212(40606),200-217.
MLA	Lin, J,et al."Water quality responses to simulated flow and nutrient reductions in the Cape Fear River Estuary and adjacent coastal region, North Carolina".ECOLOGICAL MODELLING 212.40606(2008):200-217.