A European threshold value and assessment method for macro litter on coastlines: Guidance developed within the Common Implementation Strategy for the Marine Strategy Framework Directive

The Marine Strategy Framework Directive (MSFD, 2008/56/EC) requires that European threshold values (TVs) for marine litter (descriptor 10) be defined. The MSFD Technical Group on Marine Litter (TG ML) decided to focus on coastline litter (Criterion 1), often referred to as beach litter, in a first step, since for this criterion a monitoring framework is in place and a substantial amount of fit-for-purpose beach litter monitoring data is available at the European scale (see Hanke et al., 2019). This report describes the rationale and method to obtain a European TV for beach litter, as developed by Member States and other experts within the TG ML. It was concluded by TG ML that a TV cannot be based on quantitative ecological and socio-economic harm due to a lack of scientific data on harm caused by marine litter on beaches. Of the remaining options, the use of the 10th percentile value of the total litter abundance dataset from all European beaches in the baseline period 2015-2016 was selected and applied, as it was considered to be sufficiently precautionary while being based on already available beach litter abundances in the EU. The underlying baseline dataset was developed within the TG ML. Calculation of the 10th percentile of the EU baseline dataset resulted in a value of 13 litter items per 100 m of coastline length. Further consideration of the 95% confidence intervals of the TV and assessment value, respectively, led to a final TV of 20 litter items/100 m beach length, which corresponds to the 15th percentile value of the EU baseline dataset. This TV is estimated by experts from TG ML to reduce harm from beach litter to a sufficiently precautionary level. The methodology acknowledges uncertainties in the underlying data which is considered in the proposal. The median assessment value is compared with this TV for compliance checking. It is acknowledged that achieving this TV will require substantial and sustained measures over a longer period. Intermediate targets over time towards the proposed TV are proposed to support the achievement of the TV.JRC.D.2-Water and Marine Resource

Plug the marine litter tap : A pilot study on potential marine litter sources in urban areas

Marine litter is a growing environmental problem where especially plastic material is accumulated in the seas where it will fragment to smaller pieces. The purpose of the presented pilot study is to raise awareness amongst officials at municipalities and authorities about the need to reduce the presence of litter in the marine environment and to give ideas/suggestions on how this can be done. The project has therefore developed a “Plug the Marine Litter Tap”-approach, which together with local knowledge and experience, can be used to identify sources of marine debris by using existing statistics. Södertälje is used as a pilot area where we give examples on indicators for marine litter in the urban environment and proposed measures for each indicator. We hope that this will encourage municipalities to reflect on how preventive measures against marine litter can be incorporated in local waste management plans and become part of their regular routine

Direct and indirect effects of the fungicide azoxystrobin in outdoor brackish water microcosms

The effects of the strobilurin fungicide azoxystrobin were studied in brackish water microcosms, with natural plankton communities and sediment. Two experiments were conducted: Experiment 1 (nominal conc. 0, 15 and 60 mu g/L, 24-L outdoor microcosms for 21 days) and a second, follow-up, Experiment 2 (nominal conc. 0, 3, 7.5, 15 mu g/L, 4-L indoor microcosms for 12 days). The microcosms represent a simplified brackish water community found in shallow semi-enclosed coastal areas in agricultural districts in the Baltic Sea region. Measured water concentrations of the fungicide (Experiment 1) were, on average, 83 and 62% of nominal concentrations directly after application, and 25 and 30% after 21 days, for the low and high dose treatments, respectively, corresponding to mean DT50-values of 15.1 and 25.8 days, for low and high dose treatments, respectively. In Experiment 1, direct toxic effects on calanoid copepods at both test concentrations were observed. Similarly, in Experiment 2, the copepod abundance was significantly reduced at all tested concentrations. There were also significant secondary effects on zooplankton and phytoplankton community structure, standing stocks and primary production. Very few ecotoxicological studies have investigated effects of plant protection products on Baltic organisms in general and effects on community structure and function specifically. Our results show that azoxystrobin is toxic to brackish water copepods at considerably lower concentrations than previously reported from single species tests on freshwater crustaceans, and that direct toxic effects on this ecologically important group may lead to cascade effects altering lower food webs and ecosystem functioning

Marine Littering and Sources in Nordic Waters

Marine litter is a global environmental problem that endangers wildlife and has great socio-economic and aesthetic impacts. To identify sources of marine litter is an important key in order to propose cost-effective measures. Pick analyses of beach litter have therefore been conducted in order to categorise litter items from a product perspective. The results confirm that plastic are the most common litter material found on beaches in the Nordic countries. Short life items and packaging are dominating, which is strongly linked to individual consumers. It is further concluded that the plastics and packaging industry has an important role to play to decrease the amount of marine litter