yellow water-lily and hornwort bend in strong current, shallow freshwater river with clear water and dense vegetation

air algae aquatic background balance bend biotope brandybottle brook bubble ceratophyllum challenge clear climate coldwater colourful concept contrast covered crystal current demersum dense detritis detritus disaster ecology ecosystem environment environmental europe flora flow freshwater gravel ground hornwort human impact lake leaf litter lutea moderate movement nature nuphar plant podillia poor ray river sand season shallow stem stream strong substrate sun temperate ukraine underwater vegetation vulnerable water waterlily wave wet wilderness wonder yellow