What does the term symbiosis describe?

Symbiosis describes a close and long-term interaction between two species. This relationship can take various forms, including mutualism, commensalism, and parasitism. In mutualism, both species benefit from the interaction; in commensalism, one species benefits while the other is not significantly affected; and in parasitism, one species benefits at the expense of the other. Because symbiosis encompasses these diverse interactions, it is characterized by the longevity and intimacy of the relationships, which can significantly impact the ecology of the species involved and the environment in which they coexist. This definition highlights the importance of these interactions in shaping ecosystems and influencing evolutionary processes within the species involved.