The concept of time applies to ecological situations and evolutionary changes. Ecological change leads to biological change.
The time period in which a defined and The unit of a new time scale, called, is a constant number of demographic events (i.e. births + deaths). It is ecological time.
Time is arithmetic in evolution, with units of equal measure being added constantly. Time is directional in the sense that units are never deleted but are always added. A generating process's time scale may differ from an observation's time scale, and this distinction is critical.
Ecological time may be tuned to environmental change on time scales other than generations, although evolutionary time is measured in generations. Evolution occurs from one generation to the next, and evolution occurs as generations accumulate over longer time intervals.
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