How did the Columbian Exchange affect the African people?

The introduction of new crops and the decimation of the native population in the New World led to the capture and enslavement of many African people.
The introduction of new crops and the Commercial Revolution in Europe led to the transfer of goods for African land.
The introduction of new animals and diseases to the Americas led to the Middle Passage, a ship route that transported many American Indians to Africa.
The introduction of the joint-stock company and the rise of cities and towns led many African people to invest in the New World.