Energy Movement in Ecosystems: Trophic & Energy Pyramid
Organisms can be classified into trophic (feeding) levels depending on how they get their energy. Organisms that get their energy from nonliving sources (sun, organic matter) are called autotrophs (producers) and make up the 1st trophic level. Organisms that get their energy from other living things are called heterotrophs (consumers). Heterotrophs that eat autotrophs make…