DBPapers
DOI: 10.5593/SGEM2016/B32/S15.117

THE STATUS OF BENTHIC INVERTEBRATE FAUNA FROM THE ROMANIAN BLACK SEA PORTS UNDER PRESENT ECOLOGICAL CONDITIONS

V. Abaza, O. Marin, A. Filimon, C. Dumitrache, D.M. Rosioru
Wednesday 7 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, 901-908 pp

ABSTRACT
According to EU Water Framework Directive (WFD) requirements, marine areas in front of Constanta and Mangalia were identified as heavily modified water bodies (HMWB) due to identified multiple pressure sources (human settlements, tourism, wastewater treatment plants, maritime ports and port specific activities). As data on marine invertebrates from port areas are quite limited, the ecological potential values and the limits between ecological potential classes for benthic invertebrates were not fully defined. In order to do this, additional data is necessary. Present paper brings new data on benthic population diversity, abundance, and ecological groups’ structure from the three Romanian maritime ports (Midia, Constanta and Mangalia). Based on abundance data, AMBI and Shannon diversity indices were calculated; together with species richness (S), they were integrated into the multimetric index M-AMBI*(n). Using the reference values and boundaries established for coastal waters of all above-mentioned indices, the ecological status of benthic invertebrate fauna from maritime ports was assessed. In 2015, the lowest diversity was recorded at Midia, where only 7 species were identified, most of them polychaetes (4). The highest diversity of 19 was registered at Mangalia; among them 8 polychaetes, 6 crustaceans, and 3 mollusks could be mentioned. Data collected from Constanta in the period 2007-2013 showed large variation of species richness from 3 in 2011 to 12 in 2007, without following a clear trend; nevertheless, in 2015, among the 18 species identified here, 13 were polychates. Despite its relative high species diversity, the ecological status of Mangalia port was found to be in poor status, while the other two are in moderate status. Dataset collected in 2015 will enhance the database from maritime ports, representing an important step in establishment of the ecological potential for heavily modified water bodies.

Keywords: benthic invertebrates, maritime ports, Water Framework Directive, heavily modified water bodies, ecological assessment