Why is it macroevolution?


By definition it seems. In t.o. microevolution is defined as
population - level processes, or it is defined as only changes in
allele frequencies in a single population, or it is defined as
population genetics. These are not quite the same things, but each
leaves much left over to be macroevolution. In addition,
macroevolution seems to be, per various threads with 'rev. Goetz',
sometimes not a process but the reason(s) for various processes even
though they are population-level.

Elsewhere, macroevolution is defined as including any noticeable
morphological change.

Sticking with the t.o. version: suppose a species subdivides into two
populations, A and B. Perhaps B is a relect group left behind as the
species' range shrinks. B's environment changes. If population B
evolves into a distinct species, that's cladogenesis, or
macroevolution, unless A (the rest of the species) dies out first.
Then the change in B is anagenesis, or microevolution. It depends on
distant events.

Dunk

.

Relevant Pages

  • Re: Macroevolution FAQ 2.1D
    ... Macroevolution - its definition, philosophy and history ... "microevolution" is, and by this they seem to mean that whatever evolution is ... evolutionary change at or above the level of species. ...
    (talk.origins)
  • Re: Macroevolution FAQ 2.1D
    ... > Macroevolution - its definition, ... > "microevolution" is, and by this they seem to mean that whatever evolution is ... > evolutionary change at or above the level of species. ...
    (talk.origins)
  • Re: Behe in the latest Protein Science
    ... >>species sorting or species selection. ... Microevolution is certainly involved but microevolution ... > increase in oxygen levels, chance, the evolution of evolvability, etc. ... That's what macroevolution is all about. ...
    (talk.origins)
  • Re: Why is it macroevolution?
    ... leaves much left over to be macroevolution. ... species' range shrinks. ... Then the change in B is anagenesis, or microevolution. ... single population", or "population genetics" are not exactly the same ...
    (talk.origins)
  • Re: Why is it macroevolution?
    ... population - level processes, or it is defined as only changes in ... leaves much left over to be macroevolution. ... species' range shrinks. ... Then the change in B is anagenesis, or microevolution. ...
    (talk.origins)