How Protozoa Obtain Energy
Protozoa have been classified into three trophic categories: the photoautotrophs which harness the sun’s radiant energy in the process of photosynthesis; the photoheterotrophs, which although phototrophic in energy requirements, are unable to use carbon dioxide for cell synthesis and must have organic carbon compounds; and lastly the chemoheterotrophs which require chemical energy and organic carbon sources (Nisbet, 1984). The latter group, which are more commonly referred to as heterotrophs, include the majority of Protozoa, while the first two trophic categories are largely restricted to members of the Phytomastigophorea.
KeywordsCapture Rate Prey Density Buccal Cavity Food Vacuole Food Organism
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