What happened to the native populations after the colonization begin?

they moved westward

Explanation:

they were 'kicked out' from where they were by the colonists.

Over time, their lives changed as they adapted to different environments. American Indians were creative. They found ways to live in deserts, in forests, along the oceans, and on the grassy prairies. Native peoples were great hunters and productive farmers. They built towns and traded over large distances with other tribes. These were the people the European explorers met when their ships landed in America.