Modelling phytoplankton succession and nutrient transfer along the Scheldt estuary (Belgium, The Netherlands)

	Modelling phytoplankton succession and nutrient transfer along the Scheldt estuary (Belgium, The Netherlands)
	Gypens, N.1; Delhez, E.2; Vanhoutte-Brunier, A.1,3; Burton, S.2; Thieu, V.4,5; Passy, P.4; Liu, Y.1,6 ; Callens, J.4; Rousseau, V.1; Lancelot, C.1
发表期刊	JOURNAL OF MARINE SYSTEMS
ISSN	0924-7963
	2013-12-01
卷号	128 页码:89-105
关键词	Scheldt Estuary Coupled River-marine Model Phytoplankton Succession Nutrient Export
产权排序	[Gypens, N.; Vanhoutte-Brunier, A.; Liu, Y.; Rousseau, V.; Lancelot, C.] Univ Libre Brussels, B-1050 Brussels, Belgium; [Delhez, E.; Burton, S.] Univ Liege, MARE, B-4000 Liege, Belgium; [Vanhoutte-Brunier, A.] IFREMER, UMR Amure, Dept Econ Maritime, F-29280 Plouzane, France; [Thieu, V.; Passy, P.; Callens, J.] Univ Paris 06, UMR Sisyphe 7619, F-75005 Paris, France; [Thieu, V.] Commiss European Communities, Joint Res Ctr, I-21020 Ispra, Italy; [Liu, Y.] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
通讯作者	Gypens, N (reprint author), Univ Libre Brussels, CP-221,Bd Triomphe, B-1050 Brussels, Belgium. ngypens@ulb.ac.be
英文摘要	The freshwater (RIVE) and the marine (MIRO) biogeochemical models were coupled to a 1D hydrosedimentary model to describe contemporary phytoplankton succession and nutrient transfers in the macrotidal Scheldt estuary (BE/NL) affected by anthropogenic nutrient loads. The 1D-RIVE-MIRO model simulations are performed between Ghent and Vlissingen and the longitudinal estuarine profiles are validated by visual and statistical comparison with physico-chemical and phytoplankton observations available for the year 2006. Results show the occurrence of two distinct spatial phytoplankton blooms in the upper and lower estuary, suggesting that neither the freshwater nor the marine phytoplankton gets over the maximum turbidity zone (MTZ) at the saline transition. Sensitivity tests performed to understand how changing conditions (salinity, turbidity and nutrients) along the estuary are controlling this bimodal spatial phytoplankton distribution identify salinity and light availability as the key drivers while the grazing pressure and nutrient limitation play a negligible role. Additional tests with varying salinity-resistant (euryhaline) species in the freshwater assemblage conclude that the presence (or absence) of euryhalines determines the magnitude and the spreading of freshwater and marine phytoplankton blooms in the estuary. Annual nutrient budgets estimated from 1D-RIVE-MIRO simulations show that biological activities have a negligible impact on nutrient export but modify the speciation of nutrients exported to the coastal zone towards inorganic forms, thus directly available to phytoplankton. The implementation of nutrient reduction options (upgrading of waste water treatment plants, conversion to organic farming) on the Scheldt watershed influences the whole estuary and affects both the magnitude and the speciation of nutrients exported to the coastal zone with expected impact on coastal phytoplankton dynamic. (c) 2012 Elsevier B.V. All rights reserved.; The freshwater (RIVE) and the marine (MIRO) biogeochemical models were coupled to a 1D hydrosedimentary model to describe contemporary phytoplankton succession and nutrient transfers in the macrotidal Scheldt estuary (BE/NL) affected by anthropogenic nutrient loads. The 1D-RIVE-MIRO model simulations are performed between Ghent and Vlissingen and the longitudinal estuarine profiles are validated by visual and statistical comparison with physico-chemical and phytoplankton observations available for the year 2006. Results show the occurrence of two distinct spatial phytoplankton blooms in the upper and lower estuary, suggesting that neither the freshwater nor the marine phytoplankton gets over the maximum turbidity zone (MTZ) at the saline transition. Sensitivity tests performed to understand how changing conditions (salinity, turbidity and nutrients) along the estuary are controlling this bimodal spatial phytoplankton distribution identify salinity and light availability as the key drivers while the grazing pressure and nutrient limitation play a negligible role. Additional tests with varying salinity-resistant (euryhaline) species in the freshwater assemblage conclude that the presence (or absence) of euryhalines determines the magnitude and the spreading of freshwater and marine phytoplankton blooms in the estuary. Annual nutrient budgets estimated from 1D-RIVE-MIRO simulations show that biological activities have a negligible impact on nutrient export but modify the speciation of nutrients exported to the coastal zone towards inorganic forms, thus directly available to phytoplankton. The implementation of nutrient reduction options (upgrading of waste water treatment plants, conversion to organic farming) on the Scheldt watershed influences the whole estuary and affects both the magnitude and the speciation of nutrients exported to the coastal zone with expected impact on coastal phytoplankton dynamic. (c) 2012 Elsevier B.V. All rights reserved.
文章类型	Article
资助机构	TIMOTHY Project [P6/13]; AMORE III Belgian Federal Project [P6/13]; Science for Sustainable Development -'Belgian State - Belgian Science Policy BELSPO'; AWARE project; European Commission
收录类别	SCI
语种	英语
关键词[WOS]	SOUTHERN NORTH-SEA ; FRESH-WATER ; SALINITY GRADIENT ; DIATOM SUCCESSION ; DRAINAGE NETWORK ; RIVER SYSTEMS ; CHLOROPHYLL-A ; FLUXES ; ECOSYSTEM ; DYNAMICS
研究领域[WOS]	Geology ; Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000329010900009
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/6930
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院烟台海岸带研究所
作者单位	1.Univ Libre Brussels, B-1050 Brussels, Belgium 2.Univ Liege, MARE, B-4000 Liege, Belgium 3.IFREMER, UMR Amure, Dept Econ Maritime, F-29280 Plouzane, France 4.Univ Paris 06, UMR Sisyphe 7619, F-75005 Paris, France 5.Commiss European Communities, Joint Res Ctr, I-21020 Ispra, Italy 6.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
推荐引用方式 GB/T 7714	Gypens, N.,Delhez, E.,Vanhoutte-Brunier, A.,et al. Modelling phytoplankton succession and nutrient transfer along the Scheldt estuary (Belgium, The Netherlands)[J]. JOURNAL OF MARINE SYSTEMS,2013,128:89-105.
APA	Gypens, N..,Delhez, E..,Vanhoutte-Brunier, A..,Burton, S..,Thieu, V..,...&Lancelot, C..(2013).Modelling phytoplankton succession and nutrient transfer along the Scheldt estuary (Belgium, The Netherlands).JOURNAL OF MARINE SYSTEMS,128,89-105.
MLA	Gypens, N.,et al."Modelling phytoplankton succession and nutrient transfer along the Scheldt estuary (Belgium, The Netherlands)".JOURNAL OF MARINE SYSTEMS 128(2013):89-105.

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