If you hit $0 Avail. funds for trading, your account will go into a margin call and Ameritrade will force you to sell positions or deposit money. I'm going to assume your Account Balance isn't -8.1k because you would have hit a margin call long before your account went negative unless this all happened overnight.
Sadly, these peaceful animals may not survive into the next century. Ape conservationists say time is running out, as there are only about 720 mountain gorillas left in the world, and the majority of gorilla populations are plummeting.
Quick Answer. As of 2014, the number of gorillas left in the world is around 100,000, and their population is steadily decreasing. There are two species of gorillas, and both are endangered. Only 600 mountain gorillas are left in the wild. Continue Reading.