Which type of species interaction is characterized by two species not interacting at all?

The concept of a neutral species interaction refers to a scenario where two species coexist in the same environment but do not influence each other's lives in any significant way. This lack of interaction means that neither species benefits nor suffers from the presence of the other; they simply exist together without affecting each other's population dynamics, behaviors, reproductive success, or survival.

In contrast, mutualism involves a relationship where both species benefit from the interaction, while commensalism entails one species benefiting with the other remaining unaffected. Parasitism, on the other hand, is characterized by one species benefiting at the expense of the other. These interactions focus on the positive or negative effects that species can have on each other, which is fundamentally different from the neutral interaction where no such effects take place. Therefore, the neutral interaction is distinctly defined by the absence of any influence between the two species involved.