Living Communities and Food Types
The continuous differences of properties within the river are dependent primarily on the specific composition of the organisms in different sections of the water. Throughout the continuum of the river, the proportion of the four major food types; shredders, collectors, grazers (scrapers) and predators change. With the exception of the predators, all these organisms feed directly from plant material (saprobes).
Read more about this topic: River Continuum Concept
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