Biogeochemistry

  1. Other Essential Element Cycles
    1. Silicon Cycle
      1. Silicon Sources
        1. Silicate Mineral Weathering
          1. Volcanic Glass
          2. Biological Silicon Utilization
            1. Diatoms
              1. Radiolarians
                1. Sponges
                  1. Higher Plants
                  2. Silicon Transport
                    1. Dissolved Silica
                      1. Particulate Silica
                      2. Silicon Sedimentation
                        1. Biogenic Silica
                          1. Diagenetic Processes
                        2. Iron Cycle
                          1. Iron Reservoirs
                            1. Crustal Iron
                              1. Oceanic Iron
                                1. Atmospheric Iron
                                2. Iron Redox Chemistry
                                  1. Ferrous Iron
                                    1. Ferric Iron
                                      1. Iron Minerals
                                      2. Biological Iron Cycling
                                        1. Iron Limitation
                                          1. Iron Uptake Mechanisms
                                            1. Iron Storage
                                            2. Iron Transport
                                              1. Dust Deposition
                                                1. Riverine Input
                                                  1. Hydrothermal Input
                                                2. Trace Element Cycles
                                                  1. Micronutrient Elements
                                                    1. Zinc
                                                      1. Copper
                                                        1. Manganese
                                                          1. Molybdenum
                                                            1. Cobalt
                                                            2. Toxic Elements
                                                              1. Lead
                                                                1. Cadmium
                                                                  1. Mercury
                                                                    1. Arsenic
                                                                    2. Biogeochemical Behavior
                                                                      1. Speciation
                                                                        1. Bioavailability
                                                                          1. Bioaccumulation

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                                                                      10. Terrestrial Ecosystem Biogeochemistry