Thursday, April 7, 2011

Allopatric speciation

* When two populations are Geographically isolated from one another
* separated by distance or an impassable barrier 

Eg: rising sea level

Archipelago Island

* The vast expanse of ocean that isolated the island from the main land function as a
  geographical barrier to gene flow

* Thus, over generations, the island population diverges from the mainland species.

* Individuals of the diverging population may in turn colonize other islands in the

* The Hawaiian archipelago includes 19 islands and more than 100 atolls that stretch 1500
  miles in the Pacific ocean.

* The habitats on the land masses of this archipelago range from lava beds, rain forest ,
  and grasslands to dry woodlands and snow-capped peaks.

Thank you for reading this information..

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