NIMRD Symposium 2007

International Symposium "Protection and Sustainable Management of the Black Sea Ecosystem, Imperative of the 3rd Millenium", third edition dedicated to the Blak Sea International Day (October 31), NIMRD, Constanta / Romania, October 29-31, 2007 (cf. http://www.rmri.ro / News)

PRESENT STATE AND EVOLUTION TRENDS OF THE ROMANIAN BLACK SEA COASTAL ENVIRONMENT

Dr. Eng. S. Nicolaev et al.

National Institute for Marine Research & Development “Grigore Antipa”,

Mamaia 300, RO-900581, Constanta 3, Romania, E-mail: Diese E-Mail-Adresse ist gegen Spambots geschützt! JavaScript muss aktiviert werden, damit sie angezeigt werden kann.

State and evolution trends of Romanian Black Sea costal environment continued to be monitored in 2005 from physical, chemical and biological point of view compared with reference periods dating back in early `60ies or more recent years depending on parameters. Coastal processes during the geomorphological cycle 2004-2005 have been dominated by dynamic equilibrium (41%) and erosion (40%) compared to accretion (19%). Sea level indicated very high values compared to reference period 1933-2004, in correlation with precipitations, floods and increased Danube flow (discharge)

Considerable decrease of salinity in May, July and September much below usual limits relates as well to increase of Danube flow. Nutrient (N, P, Si) and chlorophyll a concentrations, major indicators of eutrophication, increased compared to last years, occasionally exceeding those between 1996-2004, due to above mentioned reason. Some indicators of contamination, such as heavy metals, total hydrocarbons, PAHs and OCPs exceeded occasionaly previously encountered reference concentrations. Bioaccumulation of contaminants in edible bivalve mollusks did not affect their state of health. Slight improvement of state of marine ecosystem signaled end ۥ90ies, beginning 2000, continued to be proved by:

• decrease of phytoplankton densities / biomasses and related blooms,

comparable densities / biomasses of Centropages ponticus with those prior to eutrophication, reinstallment of Cystoseira barbata belts off Vama Veche,

• increase of macrozoobenthic specific diversity (up to 60 species compared to fewer number in ۥ90ies till 2004).
• Concentrations of enterobacteria (total coliforms, faecal coliforms, faecal streptococci) exceeded between 12 to 28% national and EC previsions, due to certain local disrespect of hygienic-sanitary norms and specific hydro-meteorological conditions.
• Revised Red List of macrophytes, invertebrates, fish and mammals totalized same 209 species as in 2004.
• Biodiversity and habitats continued to be characterized by specific decision indicators (state, pressure, impact, response).
• State of living resources / fish stocks has been surveyed taking into consideration evolution of state, pressure and impact indicators.

   

  New versus historical reference data concerning present state and evolution trends of the Romanian coastal environment do constitute contributions for a joint „Report on the state of the Black Sea”.