Periodicity in Nature 2
- Classifying period phenomena
- By the kind of characterizing variable (visual, auditory, economic, etc.)
- By the period (or frequency)
- Short (violin string)
- Medium (juggling, music, language)
- Long (sleep cycle, tides)
- By continuity
- Continuous (pendulum, ocean waves)
- Discrete (insect chirp, drum beat)
- By regularity
- More regular (rotation of earth, music)
- Less regular (language, breathing, fashion)
- By origin
- Physical law
- Unconscious biological process
- Conscious, learned biological process
- Periodicity in animals and the environment
- Synchronization of periodic processes with each other
- Animals with the environment
- Animals with each other
- Reasons for biological periodicity and synchronization
- The environment has periodicity in it, so animals should
take advantage of it.
- A relatively constant flow of some substance
(for example, blood) may be necessary,
but a natural way to release the substance may be in discrete
- Some substances or activities (for example, sleep)
are required periodically.
- Physical systems are naturally periodic; the bodies of
animals are physical systems.
- When conscious behaviors are scheduled periodically,
they are easier to remember.
- Periodic phenomena which are in direct or indirect contact
with each other naturally adapt to one another.
- Groups of animals may function more efficiently if
they synchronize some of their periodic processes.
- Social animals may foster group cohesion by synchronizing
some of their behaviors.