The Biogeochemical Cycle of Silicon in the Ocean.

Cover -- Title Page -- Copyright -- Contents -- Preface -- 1: The Chemical Forms of Silicon in the Marine Domain -- 1.1. The element "silicon" -- 1.2. Orthosilicic acid -- 1.3. Particulate silicas -- 1.3.1. Lithogenic silica -- 1.3.2. Biogenic silica -- 2: Techniques for Studying Stocks and Fluxes -- 2.1. Techniques for the chemical analysis of silicon -- 2.1.1. The sequential digestion method -- 2.1.2. The extraction kinetics method -- 2.1.3. The correction by aluminum method -- 2.2. Techniques for the analysis of silicon fluxes -- 2.2.1. Labeling with radioactive isotopes -- 2.2.2. Labeling with stable isotopes -- 2.3. Silica deposit labeling and cellular imaging -- 2.4. Isotopic fractionation of silicon and utilization of δ30 Si as a tracer in oceanography -- 2.4.1. Demonstration of the isotopic fractionation by the diatoms -- 2.4.2. Utilization of δ30 Si as a tracer in oceanography -- 2.4.3. The interest of analyses of the isotopic ratio of silicon -- 3: The Marine Producers of Biogenic Silica -- 3.1. Radiolarians -- 3.2. Silicoflagellates -- 3.3. Diatoms -- 3.4. Silicification within the scope of nanoplankton and picoplankton -- 3.5. Siliceous sponges -- 3.6. The functions of biogenic silica -- 3.7. The evolution of the siliceous organisms and the oceanic cycle of the silicon -- 3.8. Sedimentary opal deposits -- 4: Cellular Mechanisms of Silica Deposition by Diatoms -- 4.1. Influence of orthosilicic acid availability on uptake and diatom growth -- 4.1.1. General formulations and kinetics information -- 4.2. The chemical form of dissolved Si available for diatoms -- 4.2.1. The model of Riedel and Nelson [RIE 85] -- 4.2.2. The model of Del Amo and Brzezinski -- 4.2.3. The membrane transporters -- 4.3. Cellular mechanisms of orthosilicic acid uptake -- 4.4. Intervention of specific proteins in the deposition mechanism.

4.4.1. The Hecky et al. conceptual model -- 4.4.2. Frustulins and silaffins -- 4.4.3. Frustule synthesis, a complex physiological process -- 4.5. The stoichiometric ratios Si/C/N of diatoms -- 4.5.1. Stoichiometry in diatoms and limitation by iron -- 4.5.2. The influence of trace metals on the uptake of orthosilicic acid -- 5: Dissolution of Biogenic Silica and Orthosilicic Acid Regeneration -- 5.1. Reactivity of the particulate silica and dissolution constants -- 5.2. Processes of control of the dissolution in aqueous phase -- 5.2.1. Variation of the solubility of opal with depth -- 5.2.2. Influence of pH -- 5.2.3. Role of temperature -- 5.2.4. Relationship with bacterial degradation process -- 5.2.5. Influence of aluminum concentration -- 5.3. The solubility of opal in natural conditions -- 6: The Control of Biogeochemistry by Silicon at Global Scale -- 6.1. The preservation of calcite in ocean sediments -- 6.1.1. Control of alkalinity by organic production -- 6.1.2. The CaCO3/Corg ratio (rain ratio) -- 6.1.3. The distribution of orthosilicic acid in the Global Ocean -- 6.2. The central role of the Southern Ocean -- 6.2.1. Subantarctic Mode Water (SAMW) -- 6.2.2. Si* tracer -- 6.2.3. The influence of SAMW in the Global Ocean -- 6.2.4. The conceptual model of Sarmiento et al. -- 6.3. The silicic acid leakage hypothesis (SALH) -- 6.3.1. The last glacial-interglacial transition -- 6.3.2. The sedimentary record -- 7: The Global Budget of Silicon in the Oceans -- 7.1. Estimates of production and export of biogenic silica -- 7.1.1. Estimation of the upper limit -- 7.1.2. Estimation of the lower limit -- 7.1.3. General overview of production and export -- 7.2. The biogeochemical cycle of silicon in the Global Ocean -- Bibliography -- Index -- Other titles from ISTE in Earth Systems - Environmental Engineering -- EULA.

Description based on publisher supplied metadata and other sources.

Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2024. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.