No matter how it is born, a new gene starts its life as a single copy in the population.

As with any new mutation, by far the most likely outcome is that it will be lost by random drift or selection over the next few generations

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#Id: 3051

#Unit 10. Ecological Principles

The rate of extinction is low at the time of first colonization and immigration rate is highest

TLS Online TPP Program

#Id: 3052

#Unit 10. Ecological Principles

Earlier arriving species tend to be r-selected species, which are better dispersers, whereas later arriving species are generally K-selected species, which are better competitors.

TLS Online TPP Program

#Id: 3053

#Unit 10. Ecological Principles

Island biota size varies with distance from the source pool and island size.

TLS Online TPP Program

#Id: 3054

#Unit 10. Ecological Principles

The number of species should decrease with increasing distance of the island from the mainland - The species distance hypothesis

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#Id: 3055

#Unit 10. Ecological Principles

The number of species should increase with increasing island size. This is also known as the species-area hypothesis.

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#Id: 3056

#Unit 10. Ecological Principles

Larger populations are more resistant to extinctions.

Greater ranges of habitats promote increased speciation rates.