Biogeochemical Cycling of Macroelements in Terrestrial Aquatic Ecosystems

Biogeochemical Cycling of Macroelements in Terrestrial Aquatic Ecosystems 

Two thirds of the Earth s surface is covered with water. Most of this is ocean, as seen in the Table 5. 

As well there is water underground, called ground water . In this section, we will consider the biogeochemistry of macroelements in different natural waters with special emphasis on the general features of various biogeochemical cycles i n terrestrial water bodies. 

The chemical composition of atmospheric depositions reflects the types and rates of biogeochemical reactions in the troposphere. These chemical compositions change seriously after interactions with humid acids of the soil layer, higherplant metabolites, and soil microbes. Carbon dioxide, the end product of any organic matter decay, is readily soluble in water to yield carbonic acid, the dissociation of which 

Species Medium Equilibrium concentrations Actual contents 

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