How does redundancy in food webs contribute to ecosystem stability?

• A. It increases vulnerability to disturbances.
• B. It eliminates energy flow.
• C. Multiple species performing similar roles means the loss of one species may be offset by others, maintaining energy flow and processes.
• D. It reduces the complexity of the web.

Answer: (C)

Redundancy in food webs means that several species perform similar ecological roles, such as consuming the same kinds of prey or contributing to the same nutrient cycles. This overlap acts as a safety net for the ecosystem. If one species is lost or declines, other species that fill the same role can continue to carry out those functions, so energy still moves through the food web and essential processes like nutrient cycling continue. Because of this buffering effect, the system is more resilient to disturbances and less likely to experience sudden drops in productivity or major shifts in structure.

Some statements that suggest redundancy makes ecosystems more vulnerable, or that energy flow stops, or that the web becomes simpler, don’t fit. Redundancy helps sustain energy transfer and system processes even when some species are removed, and it tends to support robustness rather than reduce complexity.