title: Carbon in freshwater systems.
mesh_terms: D002244:Carbon / Q000032:analysis; D002245:Carbon Dioxide; D002255:Carbonic Acid; D055598:Chemical Phenomena; D002621:Chemistry; D004463:Ecology; D004735:Energy Transfer; D056890:Eukaryota / Q000378:metabolism; D005618:Fresh Water / Q000032:analysis; D009791:Oceanography; D010788:Photosynthesis; D010839:Phytoplankton / Q000378:metabolism; D014867:Water / Q000032:analysis
chemical_list: D014867:Water; D002245:Carbon Dioxide; D002255:Carbonic Acid; D002244:Carbon