What type of symbiotic relationship does not benefit either species involved?

In neutralism, neither species involved in the symbiotic relationship benefits or is harmed by the interaction. This relationship reflects an ecological scenario where two species coexist in the same environment without affecting each other’s fitness or survival. For instance, two species of birds might inhabit the same type of tree but feed on different sources of food, allowing them to live in close proximity without influencing one another's populations.

This contrasts with mutualism, where both species gain benefits, and commensalism, where one species benefits while the other remains unaffected. Parasitism is characterized by one species benefiting at the expense of another, leading to harm. Understanding neutralism helps illustrate the varying dynamics in ecosystems, showcasing a range of interactions between different organisms.