Human Impacts on Biogeography
Biologists, who commonly study the distribution of plant and animal species in different environments-their biogeography-strive to develop interpretations or explanation of the patterns of species distribution, but these may be incorrect if the effects of human beings are not taken into consideration. In some cases, these effects may be accidental; for example, some species of rat were unintentionally transported aboard ships from Europe to the islands of the South Pacific. In other cases, species distributions may have been deliberately modified by human beings. The Polynesians in the South Pacific intentionally moved the kumara(sweet potato) to islands in that region to provide the population with a new food crop.
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