Eutrophication.
D000332:Aerobiosis; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D011232:Chemical Precipitation; D004463:Ecology; D004572:Electrolysis; D056890:Eukaryota / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D009584:Nitrogen / Q000378:metabolism; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000378:metabolism; D012498:Sanitary Engineering; D012621:Seasons; D013696:Temperature; D014871:Water Microbiology; D014876:Water Pollution; D014877:Water Pollution, Chemical
D010758:Phosphorus; D009584:Nitrogen