DBPapers
DOI: 10.5593/SGEM2016/B32/S15.101

INTEGRATED ASSESSMENT OF CAUSES AND EFFECTS OF THE ROMANIAN BLACK SEA EUTROPHICATION

L. Lazar, L. Boicenco, A. Oros, V. Coatu, D. Tiganus
Thursday 8 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 775-782 pp

ABSTRACT
The study was done in the frame of FP7 PERSEUS (Policy-oriented Marine Environmental Research for the Southern European Seas) project and aims to integrate the main criteria of descriptor 5 (Eutrophication) for the assessment of “Good Ecological Status” under Marine Strategy Framework Directive. Thus, during 2012-2014 were completed 8 cruises on the network consisted of 40 stations along the continental shelf covering entire Romanian littoral. In order to have a better linkage between pressures and impacts, the stations were split in two study areas: Danube’s mouths – northern littoral and Constanta – central and southern littoral, more anthropogenic influenced. Samples were taken from the water column and were measured in-situ and into laboratory, in respect with eutrophication causes (nutrients), direct and indirect effects (chlorophyll a, dissolved oxygen and transparency). Consequently, based on each criteria evaluation and their integral assessment using Black Sea Eutrophication ASsessment Tool (BEAST) tool, we found a strong risk to not achieve the Good Ecological Status (GES) for Descriptor 5 (Eutrophication) in the Romanian Black Sea waters due to rivers discharges and other smallest local sources but intense impacting. The Northern part (Danube’s mouths) is dominated by bad-poor status even at the depths greater than 30m outlining the role of the Chilia arm and the other rivers from the NW part of the Black Sea. In the Southern part (Constanta) is distinguished the biggest port and WWTP area, usually mentioned as a main coastal pressure. Moreover, the climate changes manifested through the alteration of the Danube’s hydrological regime, seawater temperature increase, intensification of the water masses stratification, are important influencing factors of the actual eutrophication state of the Romanian Black Sea waters.

Keywords: Black Sea, nutrients, chlorophyll a, eutrophication, BEAST