The introduction of two types of new species can threaten an existing population with extinction. One type is a competitor, what is the other type?

To understand the dynamics of species interactions, it's important to recognize that the introduction of new species can have significant impacts on existing populations. In this context, the introduction of a competitor is one type of threat, while the other type is commonly a predator.

1. Competitors vie for the same resources (such as food, habitat, and other essentials), which can limit the survival and reproduction of the existing population.
2. Predators, on the other hand, directly reduce the population of the existing species by hunting and consuming them.

In summary, the two primary types of new species that can threaten an existing population are competitors and predators. This dynamic can lead to the decline and potential extinction of the native populations, particularly if they are not equipped to cope with these new pressures.