What happen?

Why/how are they being threatened?Threats to wild Pacific salmon include illegal harvest (poaching), habitat destruction from development and mining activities, dams and other blockages in rivers, unregulated overharvesting, and a rapidly changing climate. How would  the natural world (ecosystem) be affected if there were no more left? Without salmon as a food source, populations of bears would become severely at-risk. Salmon play a significant role in the survival of certain ocean species during their time in salt water. For example, the Chinook salmon are the primary prey for the southern resident killer whale. How does that make you feel? It makes me feel bad because people are ready to destroy beautiful nature for the sake of money.