List four conditions that facilitate the precipitation of ca

Solution

Four conditions that facilitate the precipitation of calcium carbonate in the ocean: A. \"\'Biologically induced’ precipitation is a direct result of microbial activities, which generate the biochemical conditions necessary to facilitate precipitation.\" Given the above, the conditions required are: 1. Microbes capable of fixing carbon. 2. The presence of \"aerobic heterotrophs (that carry out CO2 respiration)\" 3. The presence of \"anaerobic heterotrophs (primarily sulfate-reducing bacteria)\" 4. The persence of \"sulfide oxidizers\" The healthy growth of hermatypic corals involves adequate sunlight for photosynthetic processes. Aside from that, other nutrient cycles must be present for the survival of the coral communities (such as the above). The carbon fixation process is relevant to these communities because carbon is used to create sugars for these organisms.