Food Chain Concept Map

A food web is a diagram or model that illustrates the feeding relationships and the flow of energy and nutrients through an ecosystem, showing multiple interconnected pathways of who eats whom.

A food web shows multiple interconnected feeding pathways because most organisms eat and are eaten by more than one other organism, whereas a food chain illustrates a single, linear sequence of who eats whom.

Producers, such as plants and algae, are organisms that create their own food, typically through photosynthesis, forming the base of the food web by converting sunlight into chemical energy.

Consumers are organisms that cannot make their own food and obtain energy by eating producers or other consumers. They are categorized as primary (herbivores), secondary, and tertiary consumers.

Decomposers, like bacteria and fungi, break down dead organic matter and waste products, recycling essential nutrients back into the ecosystem for producers to use.

Energy flows in one direction through a food web, starting with producers capturing energy from the sun and then transferring it to consumers as they are eaten. A significant amount of energy is lost as heat at each trophic level.

The 10% rule states that, on average, only about 10% of the energy from one trophic level is transferred to the next; the remaining 90% is lost as heat or used for life processes.

Food webs are important for understanding ecosystem balance, how species depend on each other for survival, and how changes to one species can have ripple effects throughout the entire ecosystem.

Yes, a single species can occupy different trophic levels in the same food web. For example, an omnivore can be a primary consumer when eating plants and a secondary consumer when eating insects.