Black Sea twice as polluted by marine litter as Mediterranean Sea – EU project’s survey
- July 30, 2019
The amount of marine litter in the Black Sea is almost twice as high as in the Mediterranean Sea, while concentrations of some pollutants exceed their toxicity threshold value. These are the results of the Joint Black Sea Surveys presented by the EU/UNDP-funded project “Improving Environmental Monitoring in the Black Sea: Selected Measures” (EMBLAS-Plus) and the Ministry of Ecology and Natural Resources of Ukraine at a press conference in Odesa on July 29, 2019.
The surveys were held in 2017 – 2019 in the coastal waters of Georgia, Ukraine and Russia and in the open sea. They were conducted by the EMBLAS – Phase 2 project in cooperation with the Ukrainian Research Center of Ecology of Sea, the Institute of Marine Biology of the National Academy of Sciences of Ukraine as well as Mechnikov National University and others. The surveys were done following the requirements of EU Marine Strategy Framework Directive, which is aimed to protect the marine environment across the EU, and using the latest monitoring techniques, including non-target chemical screening and e-DNA analysis.
“The obtained results of the surveys should contribute to development of the evidence-based Programme of Measures to improve the status of the Black Sea (which Government of Ukraine needs to develop according to EU-Ukraine Association Agreement) as well as to global understanding of current risks and threats to marine ecosystem”, – said Dr. Jaroslav Slobodnik, project team leader.
The key findings of the environmental monitoring of the Black Sea are as follows:
>83% of the marine litter found in the Black Sea is plastic, namely bottles, packaging and bags. The large rivers (in Ukraine study included the Danube and the Dniester) bring to the sea from 6 to 50 items of litter per hour. The amount of marine litter in the Black Sea is almost twice as high as in the Mediterranean Sea (90.5 vs. 50 litter items / km2). Microplastics were found in the sediments of the Black Sea both in its shelf parts and in the depths of more than 2,000 m.
>The concentrations of some priority hazardous chemical substances dangerous for marine and human life exceed their toxicity threshold values. Among these substances were benzo(a)pyrene, several pesticides, insecticides and also mercury and flame retardants in fish. In addition, 124chemicals dangerous for the sea ecosystem and human health were identified including persistent organic pollutants, metals, pesticides, biocides, pharmaceuticals, flame retardants, industrial pollutants and personal care products. These substances had not been monitored earlier and they will be proposed to be included for regular monitoring.
>At the moment of the survey (June 2019), at least 1,000 dolphins of each species occurred in Ukrainian territorial waters of the north-western Black Sea, between the Danube Delta and the Tendra Spit in Kherson region. These values are relatively low. The greatest aggregations of dolphins in Ukrainian waters were identified near the Danube Delta and Zmiinyi (Snake) Island.
>The pressure of invasive species – non-native species which may damage local environment – at the Black Sea is growing. Using a new method of detection of DNA dissolved in sea water to discover fauna living there (e-DNA) new Mediterranean species were found in the Black Sea, including Monrovia doctorfish; red barracuda, burrowing goby (Trypauchen vagina) etc. The good news is that DNA of European sturgeon (Acipenser sturio) which was considered almost extinct in the Black Sea was found in many samples across the Black Sea. Same goes for the endangered beluga.
>There are also signs of rehabilitation of the Black Sea ecosystem. The biggest red algae field in the world – the Zernov’s Phyllophora Field improved its status from category ‘poor’ to ‘moderate’.