shallow freshwater river with clear water and dense vegetation, yellow water-lily and hornwort, lots of plants, detritis and algae

air algae aquatic background balance biotope brandybottle brook bubble ceratophyllum challenge clear climate coldwater colorful concept contrast crystal current day demersum dense detritis disaster ecology ecosystem environment environmental europe flora flow freshwater gravel ground hornwort human impact lake litter lots lush lutea moderate movement nature nuphar plant plants podillya ray river sand season shallow stream strong substrate summer sun sunny temperate threat ukraine underwater vegetation vulnerable water waterlily wave wet wonder yellow