Overview of Major Biogeochemical Transformations

In this section, we summarize some of the major geochemical transformations in which organisms partake (Table 3-6). In subsequent chapters, more [Pg.49]

Carbon Carbon dioxide fixation (CO organic material) [Pg.49]

Organic decomposition (or mineralization) (organic material 02— — inorganic material) Methane production [CO2 -t H2 (or simple organic compound such as acetate) — CH4 + H2O] Nitrogen Nitrogen fixation [N2 RNHj (organic amino [Pg.49]

Dissimilatory sulfate (S04 H2S) Dimethyl sulfide production (CHaljS Metal cycles Iron and manganese oxidation and reduction [Pg.49]

Photosynthetic organisms plants, algae, bacteria Chemoautotrophic organisms nitrifying bacteria, some sulfur oxidizers, iron oxidizers, hydrogen oxidizers [Pg.49]