Vectors — How Exotics Get Around

Abstract

The opportunities for the spread of exotics increase with the greater movement of goods and people around the world. In early times human exploratory activities were responsible for some selected species being moved as food or for cultural reasons but also inadvertently carried. As trading links and colonisation of distant lands developed a more regular transport evolved. As a result organisms spread to areas beyond their normal range, the ways in which this is done is the subject of this chapter