Bio 311D Levin

Reduces genetic variation

Creates inbreeding depression

Detrimental to Species

Allopatric or Sympatric

Usually occurs gradually

Can occur by polyploidy

Caused by higher greenhouse gas levels

Will alter environments and ecosystems

Will increase ocean levels

Will alter species ranges

Also include predation, commensalism

Competition harms both species

May be positive or negative

P nd Q are frequency of alleles

If random, tends toward heterozygosity

Few alleles are lost in normal conditions

Eliminatino of a Species

5 major extinctions have occured

May open up niches