How did the transcontinental railroad impact life on the Great Plains?

The Transcontinental Railroad dramatically altered ecosystems. For instance, it brought thousands of hunters who killed the bison Native people relied on. The Cheyenne experience was different. The railroad disrupted intertribal trade on the Plains, and thereby broke a core aspect of Cheyenne economic life.

i think it was   tsar alexander ii

it is a : ) always outside of government control