What are some examples where introducing a non native species to an area have had a negative impact?



  1. 0 Votes

    Asian Carp – introduced into the Great Lakes in the 1970’s.  They seriously depleted plankton and forced other species out.  The state of Michigan spent $9.1 million creating a barrier to keep the fish out of the lakes, yet Asian carp have still been found.

    Africanized Bees – kill one to two people per year, have dominated other native bee species.

    Starlings – brought from Britain in the late 1800’s, they are among the most numerous birds in North America.  They crowd out native bird species in many states, and in one study conducted by Cornell University, they cause $800 million in damage to crops each year.  In 2008, the US government poisoned almost 2 million of the birds.

  2. 0 Votes

    The Emerald Ash Borer has been devastating forests in the eastern U.S. These beetles eat through and kill ash trees that are any wider than 1 inch in diameter. Ohio is estimated to lose almost 1/4 of all its trees. There is no good way to get rid of the pests until they eat through all the ash trees in that area. They originally got in Michigan from wood that was transported from Asia. 

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