The main role of heterotrophic microbes in the global ecosystem is as decomposers that release the nutrients bound in organic material.
(The main role of heterotrophic microbes in the global ecosystem; is; as decomposers) (decomposers; release; the nutrients bound in organic material) (the nutrients; bound; in organic material)
The main role of heterotrophic microbes in the global ecosystem decomposers the nutrients
is release bound
as decomposers
the nutrients bound in organic material
in organic material