water soldiers aquatic plant in shallow freshwater river with dense vegetation, big and beautiful herb

algae aloides aquatic autumn baby background balance beautiful big biotope birth brook challenge climate coldwater concept contrast current dense detritis detritus dirty ecology ecosystem environment essential europe flora flow freshwater gives ground herb hornwort human impact lake leaf litter moderate nature organic particle plant ray river sand season shallow soldiers still stratiotes stream submerged substrate sun temperate threat ukraine underwater unusual vegetation vinnytsia vulnerable water wonder