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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; jing_lin@ncsu.edu
2008
发表期刊ECOLOGICAL MODELLING
ISSN0304-3800
卷号212期号:40606页码:200-217
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.
部门归属[Lin, Jing; Xie, Lian; Xu, Honqzhou] N Carolina State Univ, Dept Marine Earth & Atmospher Sci, Raleigh, NC 27965 USA; [Lin, Jing; Xu, Honqzhou] E China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai 200062, Peoples R China; [Pietrafesa, Leonard J.] N Carolina State Univ, Coll Phys & Math Sci, Raleigh, NC 27695 USA; [Xu, Honqzhou] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China; [Xu, Honqzhou] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China; [Woods, Wendy; Mallin, Michael A.; Durako, Michael J.] Univ N Carolina Wilmington, Ctr Marine Sci, Wilmington, NC 28409 USA
关键词Water Quality Numerical Modeling Nutrient Flux Estuary Cape Fear River
学科领域Ecology
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收录类别sci
WOS记录号WOS:000254667500003
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被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/5372
专题海洋生物
通讯作者jing_lin@ncsu.edu
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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.,...&jing_lin@ncsu.edu.(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.
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