Trends of population that has invaded the territory. The effect   of the of the population on the territory. Look for an invasive   species. Introduced accidentally. Effect of this species   on the territory. Predict long-term effects using past data.
        Australia – cane toad
      Before 1935, Australia did not have any toad species of its   own. What the country did have however, was a major beetle problem.   Two species of beetles in particular, French's Cane Beetle   and the Greyback Cane Beetle, were in the process of decimating   the northeastern state of Queensland's sugar cane crops.   The beetle's larvae were eating the roots of the sugar cane   and stunting, if not killing, the plants. The anticipated   solution to this quickly escalating problem came in the form   of the cane toad. After first hearing about the amphibians   in 1933 at a conference in the Caribbean, growers successfully   lobbied to have the cane toads imported to battle and hopefully   destroy the beetles and save the crops.
        The plan backfired completely and absolutely. As it turns   out, cane toads cannot jump very high, only about two feet actually   , so they did not eat the beetles that for the most part lived   in the upper stalks of cane plants. Instead of going after the   beetles, as growers had planned, the cane toads began going   after everything else in sight--insects, bird's eggs and   even native frogs. And because the toads are poisonous, they   began to kill would-be predators. The toll on native species   has been immense.
        the Green and Yellow bell frog, (litoria aurea). If the predicted   effects of global climate change hold true for Australia,   scientists suggest that the cane toad's range will expand   into pockets of Western Australia and as far south as Sydney   as a whole within the next 20 years.
      Researchers hypothesize that when the cane toads are introduced   or spread into a new area, they gorge themselves on the sudden...