Secondary production is an ecosystem (energy flow) concept that is measured using a population technique. Textbooks rarely mention that it can address population/community questions as well.

Food webs describe the relationships — links or connections — among species in an ecosystem, but the relationships vary in their importance to energy flow and dynamics of species populations.

Understand the basics of how energy moves through an ecosystem by learning about the food web and the different classifications organisms in the web.

A food web is a diagram showing an ecosystem's complex feeding relationships. Learn about types of food webs and how they differ from a food chain.