The Rhythms of Plankton

This chapter explores the influence of rhythms on plankton life, shaped by factors like day–night cycles, moonlight, and seasonal changes. Circadian rhythms govern the activities of phytoplankton and zooplankton, ensuring a balanced ecological order. Circalunar rhythms reveal how moonlight affects zooplankton depth, influencing their avoidance of predators. Circannual rhythms align with the four seasons, orchestrating events like synchronized coral spawning and plankton blooms. The chapter extends to multi-year cycles, discussing phenomena like “El Niño” and the North Atlantic Oscillation, impacting ocean conditions and planktonic life. The chapter underscores the intricate, often unnoticed, rhythms of the ocean, where nature moves in harmony with its own cadence.