. . . "habitat" . "Freshwater_ecosystem#Threats" . . "Freshwater system" . . "freshwater ecosystems" . "aquatic environments" . "freshwater habitats" . "Freshwater ecosystem" . "freshwater ecology" . "aquatic habitat" . "freshwater" . "Freshwater ecosystem" . . "freshwater biology" . "fresh water" . "environment" . . . . "freshwater vegetation" . "freshwater lakes" . "freshwater habitat" . . "freshwater ecosystem" . "ecosystems" . "freshwater biodiversity" . "waterways" . .