Island isolation promotes allopatric speciation. Sympatric speciation on islands

Question

Island isolation promotes allopatric speciation.

Sympatric speciation on islands is easier than in mainland environments because rates of chromosomal evolution are higher on islands.

When we look at islands across the planet (think the islands of the Galápagos and Hawaii) we see that there are a remarkable number of island endemic species, species that are found nowhere else. What is a possible explanation for this observation? Sympatric speciation on islands is easier than in mainland environments because levels of disruptive selection are higher on islands. Vicariance events are more common on islands than in mainland environments.

Island isolation promotes allopatric speciation.

Sympatric speciation on islands is easier than in mainland environments because rates of chromosomal evolution are higher on islands.

Extinction rates are lower in islands so species that have gone extinct elsewhere persist on islands.

Explanation / Answer

The answer is - Island isolation promotes allopatric speciation.

Here the species are seperated by physical barrier that is the ocean. Islands are isolated by each other by water bodies. No gene flow occurs between the separaterd species. Now living in distint island the species get adapted to the environment of the island. Finally they diverge as seperate species.

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