Assessment of River-Sea Interaction in the Danube Nearshore Area (Ukraine) by Bioindicators and Statistical Mapping

There is a lack of understanding the main drivers that form picture biological communities transitional waters in deltaic ecosystems under influence terrestrial sources. Analysis hydrochemical parameters relation to phytoplankton Ukrainian part Danube coastal zone (in August 2018) focus current work. The goal was identify patterns distribution environmental (salinity and nutrients) area shipping channel through Bystry arm, as well assess state water quality. ecological bioindicators approach using modern statistical methods, mapping shows sufficient achievements interpreting results. indicators salinity (mesohalobes) had better describe character transportation fresh riverine than gradient. composition 35 indicator species corresponds 3 4 quality classes zone. High N:P ratios showed an imbalance ecosystem production destruction processes. Statistical maps revealed river current’s on nearshore mass. Ecological surface bottom variables show various impacts resulting from dredging excavated soil dumping. Canonical correspondence analysis (CCA) two pools factors with oppositely directed effects phytoplankton: salinity, one hand, nutrients, other. Miozoa Chlorophyta have opposite interaction oxygen can be change further