Many species expanded or changed their geographic range after the last (Wisconsi

Question

Many species expanded or changed their geographic range after the last (Wisconsin glacier retreated, about 12,000 years ago. What would the consequences have been for the evolution of those species? what were the effects of range changes on the species composition of ecological communities See also chapter 9) The agricultural revolution started about this time (10-12,000 years before present). How would the changing climate AND the opening of new habitats support the development of an agrarian community for humans? a. b. c.

Explanation / Answer

a) About 12000 years ago, increase in global temperature cause the glacial retreat and increase sea level submerged the land bridge again abd forest begins to replace the mammoth steppes. Change in the climate lead to change in the habitate responsible for evolution of those species.

C) Change in climatic condition lead to extinction of many species and forest replace with grassland means there was less option for hunting and large area prompted human to move toward farming instead of hunting. In that manner there was a development of agrarian community. This is not occur in one night but takes several year for what we have today agriculture community.

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