This is called species richness
<span>An island can become a seamount only if there is native and active volcanic activity that is able to raise the landmass sufficiently above sealevel.</span>
Colonization caused a major cultural shift and merge. For example, the English left a footprint on the United States, which is why Americans speak English. Another example is the country of Haiti in the Caribbean. They were a colony of France and now today their population speaks Haitian French. Traditions of colonizers were also passed down. Mexico was a colony of Spain and at the time of the colonization of the New World Spain was highly Catholic, now the Mexican population are also highly Catholic due to the spreading of Catholicism during Mexicos colonial days. The merge of Settlers and Natives also created a new mix of population and a more diverse community. Even Japan during WW2 had colonized Indochina (Vietnam, Cambodia, Laos) which in the short period all the Vietnamese learned Jungle War tactics from the Japanese that were used in The Vietnam War.
The San Andreas Fault in California :)
