Thus, protist grazing provides substrates for the further growth of prey, which include both heterotrophic bacteria (Jumars et al. 1989, Christaki et al. 1999) and autotrophic cells (Dolan 1997).

Canfield is talking primarily about heterotrophs — organisms, including humans, that get their nutrients and energy by consuming other organic matter. Not all organisms do this exclusively.

15 ± 10% are produced by heterotrophic feeding on modern DOC derived from sinking POC; and 14 ± 7% were produced and exported directly from the surface. Although the latter two components are ...