What would happen if the competition for food leads to extinction?

Answer 1

This frequently happens. Loss of habitat leads to loss of food sources and shelter. Often, when new non-native species are introduced, it is usually the introduced species that thrives and the native species that becomes extinct. Ultimately, what happens is that yet another species gets marked down as extinct, but nothing is done to address the problem. .. On the other hand, would a species "get marked down" if no observation of it is made? would another species benefit from the extintion? would a species that benefits from the the more plentiful food source consider it "a problem"? would another species suffer a change of diet? is there a species that relied on the feces of the extinct species, or the breath of the species, or some intestinal function, or needed the food source to be kept in check that the extinct species was competing for? would another species be able to use the winning species as a food source, or symbiont, or ...