green surface of on ukrainian river dnepr covered by cyanobacterias

abstract aquatic art atmosphere background bacteria bluegreen bright color cover covered cyanobacteria cyanobacterias decoration design dirt dirty dnepr dnepropetrovsk dnipro ecology ejection evolution flow green greenish grunge hot light lightgreen mould natural nature outdoor pattern photosynthesis phytoplankton planktonic result river season seasonal seasons summer surface temperature texture ukrainian wallpaper warming water white