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Which Environmental threshold values to evaluate the Good Environmental Status of the European Union marine waters in the context of the Marine Strategy Framework Directive ?

Abstract : The Marine Strategy Framework Directive (MSFD) aims to achieve Good Environmental Status of the EU's marine water by 2020 and to protect the resource upon which marine-related economic and social activities depend. The Directive lists four European regions: the Baltic Sea, the North-East Atalntic Ocean, the Mediterranean Sea and the Black Sea located within the geographical boundaries of the existing Regional Sea Conventions. France is involved in four sub-regions: The Channel-North Sea, Celtic seas, Bay of Biscay and Western Mediterranean. In order to achieve GES by 2020, each Member State is required to develop a strategy for its marine waters with definition and implementation of monitoring and measures programs. GES is defined using 11 descriptors. This study focuses on descriptor 8 on "contaminants". GES under this descriptor is reached when "contaminants are at level not giving rise to pollution effects". Environmental chemical threshold values have therefore to be defined. Environmental threshold values do already exist for several MSFD priority contaminants used within other contexts. The Water Framework Directive (WFD) sets the strategy against the chemical pollution of surface water bodies including transitional water bodies. To determine the overall quality of a water body, Environmental Quality Standards (EQS) are used. OSPAR sets the objective of preventing pollution of the maritime area by continuously reducing discgarges, emissions and losses of hazardous substances, with ultimate aim of achieving concentrations in the marine environment near background values for naturally occuring substances and close to zero for man-made synthetic substances (background assessment criteria (BAC)). Environemental Assessment Criteria (EAC) are assessment tools intended to represent the contaminant concentration below which no chronic effects are expected to occur in marine species. In order to determine which environemental threshold should be used for the implementation of MSFD (EQS, EAC, other threshold), a comparaison is done between the metodology used to determine EQS and EAC. This allows to highlight the main differences existing between both approaches and to explain how different values are obtained for one contaminant. This work focuses on two contaminants for which both EQS and EAC values are available on molluscs.
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Submitted on : Friday, August 3, 2018 - 1:17:57 PM
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Anis Amara, I. Amouroux, Mélissa Dallet, Sandrine Andres. Which Environmental threshold values to evaluate the Good Environmental Status of the European Union marine waters in the context of the Marine Strategy Framework Directive ?. 27. SETAC Europe annual meeting, May 2017, Bruxelles, France. ⟨ineris-01853440⟩

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