31. While zoanthids are less efficient heterotrophs , they produce more energy photosynthetically due to their lack of a calcified skeleton. 32. However, the question is still left open, as the plant is in any case not a myco-heterotroph . 33. Some plants, known as myco-heterotrophs , parasitize mycorrhizal fungi, and hence act as epiparasites on other plants. 34. Carnivorous organisms rely on autotrophs indirectly, as the nutrients obtained from their heterotroph prey come from autotrophs they have consumed. 35. This indicates that the ciliate is primarily an heterotroph , but after acquiring algal plastid, it transforms into an autotroph. 36. Most heterotrophs are chemoorganoheterotrophs ( or simply organotrophs ) who utilize organic compounds both as a carbon source and an energy source. 37. Fungi are scavenging heterotrophs and spread much more quickly than do plants ( which tend to stay rooted in one location ). 38. These reduced carbon compounds can be used as an energy source by the autotroph and provide the energy in food consumed by heterotrophs . 39. Thus, " D . acuminata " is a mixotroph, primarily a heterotroph , but autotroph once it acquires plastids. 40. Species are broadly categorized as autotrophs ( or primary producers ), heterotrophs ( or consumers ), and Detritivores ( or decomposers ).
