The overall effect of migration is twofold: 

1.it prevents populations from becoming genetically different from one another, 

2.it increases genetic variation within populations.

TLS Online TPP Program

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#Unit 10. Ecological Principles

The propagule pressure hypothesis suggests invasives produce more progeny than some native species.

TLS Online TPP Program

#Id: 1882

#Unit 10. Ecological Principles

Outcomes of Competition- 

Reduction in population sizes

Change in space use or activity 

Competitive exclusion

Character displacement

TLS Online TPP Program

#Id: 8657

#Unit 10. Ecological Principles

Competition as a negative interaction between two species that depend on the same limiting resource to survive, grow, and reproduce.

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#Id: 8658

#Unit 10. Ecological Principles

Intraspecific competition - Competition among individuals of the same species. 

Interspecific competition - Competition among individuals of different species

TLS Online TPP Program

#Id: 8659

#Unit 10. Ecological Principles

TLS Online TPP Program

#Id: 8660

#Unit 10. Ecological Principles

Liebig’s law of the minimum Law stating that a population increases until the supply of the most limiting resource prevents it from increasing further.