How does a food web differ from a simple food chain?

• A. A food chain shows many interconnections; a food web shows a single path.
• B. A food web shows many interconnections; a food chain shows a single path.
• C. A food chain is more accurate representation of ecosystems than a food web.
• D. A food web has only producers and consumers.

Answer: (B)

Feeding relationships in ecosystems are better thought of as a network rather than a single line. A simple food chain traces energy along one straight path—from a sun-powered producer to a series of consumers in a single sequence. A food web, by contrast, connects many of these chains into a network, showing that most organisms have multiple food sources and multiple predators. Producers can be eaten by more than one herbivore, and predators may rely on several different prey; decomposers and detritivores also play a role in recycling matter within the web. Because energy can move along multiple routes, a change in one species can ripple through the system in several ways, making the web a more realistic and informative picture of ecosystem dynamics. That’s why describing a food web as showing many interconnections and a food chain as showing a single path best captures the difference. The other ideas flip that relationship, claim chains are more accurate, or overlook the broader set of species involved in a web.