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- W109304428 abstract "Although many different parameters may be considered when an aquatic ecosystem is assessed for its water quality and ecological integrity, one important chemical indicator is an analysis of the concentrations of the major cations Ca, Mg, Na, K, and Al. Each major cation has important biological functions, biogeochemical relationships, and ecological roles that influence the ability of an aquatic ecosystem to sustain life forms and active food webs. Concentrations of these ions in surface waters are determined by hydrologic factors and interactions among various source and sink processes such as atmospheric deposition, mineral weathering, ion exchange, microbial mineralization, biological assimilation, sedimentation, and geochemical precipitation reactions. In many surface waters, generation of acid neutralizing capacity is closely linked to the cycles of Ca, Mg, and Na, whereas cycling of the critical nutrient P may be strongly influenced by the biogeochemistry of Al. Despite wide variations in the concentrations of major cations in different surface water systems, several consistent chemical patterns have been observed. With the exception of locations affected by coastal marine aerosols, most surface waters contain mixtures of major cations ranked in the following order of abundance based on molar charge concentration: Ca Mg Na K ≥ Al. However, acidified surface waters may experience elevated concentrations of Al, which pose a risk for sensitive aquatic biota." @default.
- W109304428 created "2016-06-24" @default.
- W109304428 creator A5006764286 @default.
- W109304428 date "2009-01-01" @default.
- W109304428 modified "2023-09-26" @default.
- W109304428 title "Major Cations (Ca, Mg, Na, K, Al)" @default.
- W109304428 cites W1565689223 @default.
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- W109304428 doi "https://doi.org/10.1016/b978-012370626-3.00093-4" @default.
- W109304428 hasPublicationYear "2009" @default.
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