You can find a summary in here https://www.virginia.gov/government/
Answer:
Well since everyone was going to California for it they didn't have as much workers. They also didn't get any gold so if anything they did not benefit at all.
Explanation:
Hope this helps!
In general the conditions became better because federal policies started focusing on integrating Native Americans into the American society and providing them with education and jobs. The around the middle of the century policies started getting focused on getting them into cities, and nowadays they are about preserving their culture and giving them forms of self-governance according to their customs.
I believe the answer is embargo. Hope that helps!