Island-dwelling species have arguably been hurt the most by human activity. Island ecosystems are generally unique and rather fragile, not prepared for the arrival of invasive species. Human seafaring took us — and rats and other passengers — to many of these islands. In some cases we hunted the endemic wildlife to extinction ourselves (the dodo) and in other cases introduced species are doing the work for us (brown tree snake in Guam). Look at this statistic, from the Convention on Biological Diversity: “of the 724 recorded animal extinctions in the last 400 years, about half were island species.”
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