The environmental state of Argentinean lakes: An overview

摘要: Due to the great climatic variety and peculiar north‐south orographic distribution, Argentinean lake systems include a wide diversity of aquatic environments. The deepest lakes are situated in Andean Patagonia Tierra del Fuego, range from ultraoligotrophic oligotrophic. Patagonian Plateau shallower than usually mesotrophic eutrophic. All Chaco-Pampa Plain very shallow eutrophic hypertrophic or salt lakes. Most central‐western northwestern arid regions reservoirs lakes, More half have low dissolved oxygen concentrations hypolimnion during mid-summer. Argentina has more 400 with surface area >5 km 2 , but for some them not even major ion data available. In order synthesize extract general characteristics patterns, issues been selected which adequately reflect character environment Argentina. We divided according geographical into six divisions: Puna, Plain, Peri-Pampean Sierras, Patagonia, Plateau, Misiones Plateu Brazilian Shield-related systems. undisturbed However, lightly impacted by agricultural operations. Moreover, most located ‘corridor’ highly agriculture. Other both north south through dark humic-stained large river floodplain dilute high altitude glacial still larger proportion its waters natural conditions. expected developments resources indicates that goals water management should preservation pre-European environment, evolution stable, managed developed regions.