If multiple species perform the same vital role, such as fixing nitrogen or pollinating flowers, what is this mechanism called?

Answer

Functional redundancy

Functional redundancy occurs when several different species can perform the same critical role within the ecosystem, ensuring the function continues even if one species is lost.

If multiple species perform the same vital role, such as fixing nitrogen or pollinating flowers, what is this mechanism called?
EcologyEcosystemResiliencebiodiversity