ABSTRACT

An ecosystem contains two chief types of food webs: a grazing food web (plants, herbivores, carnivores, top carnivores) and a decomposer or detrital food web (Figure 6.7).

This simple feeding sequence

plant ® herbivore ® carnivore ® top carnivore

is a grazing food chain. An example is

leaf ® caterpillar ® bird ® weasel.