In ecological theory,what the term for one racial or ethnic group trying to move into the territory of another?

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Invasion refers to one group attempting to move into the territory of another. Resistance refers to the actions taken by the group being invaded to stop or prevent the invasion. Competition refers to conflict between two or more groups vying for resources. Accommodation refers to the idea of two groups coexisting peacefully without conflict. Assimilation refers to one group adopting the values and culture of another.

In Ecological Theory,what the Term for One Racial or Ethnic