The first quantitative and comprehensive assessment of the eutrophication status from coastal to offshore French waters was performed within the Marine Strategy Framework Directive (MSFD descriptor 5) for the English Channel, the southern bight of the North Sea, the Celtic Seas, the Bay of Biscay and the Western Mediterranean Sea. Based on a combination of different data sources (in situ, satellite, and modeling products), a fully-integrated dataset was generated over the period 2010–2016. Using the best available knowledge on the eutrophication process and definition, the assessment procedure was implemented considering nutrient pressures, and direct and indirect effects of excessive inputs. The different steps of the assessment were: (i) Establishment of assessment levels and thresholds, (ii) development of methodology for aggregation and integration of data, and (iii) qualification of the Environmental Status. We investigated how reliable this assessment procedure was when considering other complementary information. Results highlighted that, despite efforts in recent decades to reduced nutrient inputs, the pressure on coastal marine ecosystems was still high. We discuss options for improving the coherence between MSFD and other similar approaches and associated monitoring programs. This study identifies areas where an increased monitoring effort is needed to improve the assessment and where environmental management actions are of priority.

中文翻译：

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对英吉利海峡，凯尔特海，比斯开湾和地中海沿岸法国洋水域富营养化状况的首次全面定量多参数评估

在针对英吉利海峡，北海南部海岸线，凯尔特海，比斯开湾的海洋战略框架指令（MSFD描述符5）中，对沿海和法国近海的富营养化状况进行了首次定量和全面评估。和西地中海。基于不同数据源（原位，卫星和建模产品）的组合，在2010-2016年期间生成了完全集成的数据集。利用关于富营养化过程和定义的最佳现有知识，在执行评估程序时要考虑营养压力，过量投入的直接和间接影响。评估的不同步骤是：（i）确定评估水平和阈值，（ii）开发用于数据汇总和整合的方法，以及（iii）环境状况认证。我们研究了在考虑其他补充信息时该评估程序的可靠性。结果强调，尽管最近几十年来努力减少养分投入，但对沿海海洋生态系统的压力仍然很大。我们讨论了提高MSFD与其他类似方法和相关监视程序之间一致性的选项。这项研究确定了需要加强监测工作以改善评估的领域以及优先采取环境管理措施的领域。结果强调，尽管最近几十年来努力减少养分投入，但对沿海海洋生态系统的压力仍然很大。我们讨论了提高MSFD与其他类似方法和相关监视程序之间一致性的选项。这项研究确定了需要加强监测工作以改善评估的领域以及优先采取环境管理措施的领域。结果强调，尽管最近几十年来努力减少养分投入，但对沿海海洋生态系统的压力仍然很大。我们讨论了提高MSFD与其他类似方法和相关监视程序之间一致性的选项。这项研究确定了需要加强监测工作以改善评估的领域以及优先采取环境管理措施的领域。