Name the three energy roles that organisms fill in an ecosystem.
Each of the organisms in an ecosystem fills the energy role of producer, consumer, or decomposer.
How do organisms in each of the three energy roles obtain energy?
An organism that can make its own food is a producer. An organism that obtains energy by feeding on other organisms is a consumer.. Decomposers break down wastes and dead organisms and return the raw materials to the ecosystem.
What are the energy roles of the following organisms in a pond ecosystem: tadpole, algae, heron?