What happened to the eco-system when Tasmanian Tigers went extinct?

Unfortunately, too little, too late, was done to protect the Tasmanian tiger. In fact, a bounty was placed on the Tasmanian tiger as farmers feared than as a threat to livestock.

The Tasmanian government did not act to protect the Thylacine (as it was properly called) until 1936, the same year as its believed extinction.