Answer :
Final answer:
The process where diatoms sequester carbon deep in the water is known as the biological carbon pump. The diatoms consume CO2 during photosynthesis and when they die, they sink and sequester the carbon that's not easily accessible for saprobes to consume and return to the atmosphere.
Explanation:
The process wherein shelled plankton like diatoms that sink deep into the water sequester carbon is called the biological carbon pump process. During periods of nutrient availability, the population of diatoms bloom beyond the numbers consumed by aquatic organisms. The extra diatoms incorporated carbon dioxide into their cells during photosynthesis, and then they sink to the sea floor when they die. Because these now sequestered diatoms are not easily reached by saprobes that feed on dead organisms, the carbon dioxide they consumed is not returned to the atmosphere, thereby creating a key part of a balanced carbon cycle.
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