[permaculture] The Heretic - Was Thoughts on PDCs

Lawrence F. London, Jr. venaurafarm at bellsouth.net
Sat Dec 12 21:22:43 EST 2009


Tripp Tibbetts wrote:
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speciation event
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Speciation
 From Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Speciation

Speciation is the evolutionary process by which new biological species 
arise. The biologist Orator F. Cook seems to have been the first to coin 
the term 'speciation' for the splitting of lineages or 'cladogenesis,' 
as opposed to 'anagenesis' or 'phyletic evolution' occurring within 
lineages.[1][2] Whether genetic drift is a minor or major contributor to 
speciation is the subject of much ongoing discussion. There are four 
geographic modes of speciation in nature, based on the extent to which 
speciating populations are geographically isolated from one another: 
allopatric, peripatric, parapatric, and sympatric. Speciation may also 
be induced artificially, through animal husbandry or laboratory 
experiments. Observed examples of each kind of speciation are provided 
throughout.[3]

speciation
http://en.wikipedia.org/wiki/Speciation

species
http://en.wikipedia.org/wiki/Species

evolutionary
http://en.wikipedia.org/wiki/Evolution

cladogenesis
http://en.wikipedia.org/wiki/Speciation

genetic drift
http://en.wikipedia.org/wiki/Genetic_drift

anagenesis (phyletic evolution)
http://en.wikipedia.org/wiki/Anagenesis

phyletic
Anagenesis, also known as "phyletic change," is the evolution of species 
involving an entire population rather than a branching event, as in 
cladogenesis

allopatric
http://en.wikipedia.org/wiki/Allopatric_speciation

peripatric
http://en.wikipedia.org/wiki/Peripatric_speciation

parapatric
http://en.wikipedia.org/wiki/Parapatric_speciation

sympatric
http://en.wikipedia.org/wiki/Sympatric_speciation


















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