The semi-lunar and lunar cycles (14.8 days/29.5 days), linked to the phases of the moon, also strongly modulate the marine environment, via light and tides. The seasons also affect these ecosystems.

Circadian clocks ensure that we modulate our physiological behaviors, like sleeping and eating, in a rhythmic, 24-hour cycle. They are present in all living cells, from cyanobacteria to humans.

For those who need a circadian rhythm definition, it's your body's internal clock that runs on a 24-hour cycle. This internal clock tells your body when you feel tired or awake throughout the day ...

Organisms rely on a biological clock known as the 'circadian' clock to regulate their activity according to the time of day. A central clock, constituted by a group of brain cells - the ...