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首页> 外文期刊>Estuarine Coastal and Shelf Science >Transformations of nutrients (N, P, Si) in the turbidity maximum zone of the Seine estuary and export to the sea
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Transformations of nutrients (N, P, Si) in the turbidity maximum zone of the Seine estuary and export to the sea

机译:塞纳河河口浊度最大区域中养分(N,P,Si)的转化并出口到海洋

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摘要

Nutrients (N, P, Si) were studied in the turbidity maximum zone (TMZ) of the Seine estuary at various moments of tidal cycles from April to October in 2001, 2002 and 2003, covering a salinity gradient from 0 to 27. Contrasted hydrological conditions were observed (extremely wet in 2001, unusually dry in 2003). Nutrient fluxes were analysed in terms of an indicator of coastal eutrophication potential (ICEP) using nutrient stoichiometry. Besides these three years, nutrient fluxes and corresponding ICEP values were analysed for a 17-year period, from 1990 to 2006. N, P and Si forms did not show ample transformations in the salinity gradient, revealing that the estuary plays a limited buffer role at the interface between river and coastal zone, however not inconsiderable during dry hydrology when longer water and particle residence times are compatible with the biological growth rates. The simplified LIFT model of the TMZ, already used for analysing organic matter transformation, was implemented here to simulate the nutrients' behaviour in the salinity gradient and to quantify nutrient fluxes after their transit in the TMZ. Abatements ranging from 15% to 40% of incoming N and P were calculated, without significant changes for silica. Although P-ICEP values did not show a severe risk for coastal eutrophication for the past few years, contrary to the situation from 1970 to 2000, the high N-ICEP, due to a steady use of fertilisers in agriculture, is a real threat for eutrophication and harmful algal blooms.
机译:在2001年4月至10月,2002年和2003年的各个潮汐周期的塞纳河河口最大浊度区(TMZ)中研究了养分(N,P,Si),其盐度梯度为0到27。观察到了这种情况(2001年极端潮湿,2003年异常干燥)。使用营养化学计量法根据沿海富营养化潜力(ICEP)指标分析了营养通量。除这三年外,还分析了1990年至2006年这17年中的营养通量和相应的ICEP值。N,P和Si形态在盐度梯度中未显示出足够的转换,表明河口在缓冲作用中作用有限。在河流和沿海地区之间的交界处,但是在较长的水和颗粒停留时间与生物生长速度相适应的干旱水文学中,这并非不容忽视。 TMZ的简化的LIFT模型已经用于分析有机物的转化,在这里实现了该模型,以模拟营养盐在盐度梯度中的行为,并量化养分通入TMZ后的养分通量。计算得出的氮和磷减少量为15%至40%,而二氧化硅的变化不大。尽管在过去的几年中P-ICEP值并未显示出沿海富营养化的严重风险,但与1970年至2000年的情况相反,由于在农业中稳定使用化肥而导致的高N-ICEP确实是威胁。富营养化和有害藻华。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第3期|p.129-141|共13页
  • 作者单位

    UPMC, Univ Paris 6 UMR Sisyphe 7619. Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France,CNRS, Univ Paris 6 UMR Sisyphe 7619, Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France;

    rnUPMC, Univ Paris 6 UMR Sisyphe 7619. Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France,CNRS, Univ Paris 6 UMR Sisyphe 7619, Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France;

    rnUPMC, Univ Paris 6 UMR Sisyphe 7619. Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France,Universite de Grenoble, UMR LTHE 5564, BP53, 38041 Grenoble Cedex 09, France;

    rnUPMC, Univ Paris 6 UMR Sisyphe 7619. Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France,UPMC, Univ Paris 6 & CNRS, UMR BIOEMCO 7618, Boite 123, Tour 56, Etage 4, 4 Place Jussieu, 75005 Paris, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    estuarine TMZ; nutrients N; P; Si; coastal zone fluxes; eutrophication indicator; seine river;

    机译:河口TMZ;营养素N;P;海岸带通量;富营养化指标塞纳河;

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