THE LONG TERM OF THE BIOTIC COMMUNITIES STRUCTURE DYNAMICS IN THE AQUATIC ECOSYSTEMS FROM THE DANUBE DELTA BIOSPHERE

摘要

The paper presents the research results regarding the comparative biological analysis of the aquatic ecosystems of the Danube delta in two sampling sites: Uzlina and Murighiol for the samplings period April 2003-October 2004. Investigations of the biological properties of water and sediment samples from Uzlina and Murighiol control sections have been accomplished from the viewpoint of phytoplanktonic, zooplanktonic and benthonic macroinvertebrates components and the analysis of the biotic communities in the sampling site was focused on the quantitative (numerical density, biomass, abundance after numerical density and biomass) and qualitative components (dominant species, indicator species).