How does biodiversity underpin ecosystem resilience and stability?

How does biodiversity underpin ecosystem resilience and stability?

• A. Higher biodiversity increases redundancy and functional overlap, enabling ecosystems to adapt to disturbances and recover more quickly.
• B. Lower biodiversity leads to higher resilience
• C. Biodiversity has no effect on resilience
• D. Biodiversity only affects aesthetic value

Answer: (A)

Biodiversity strengthens resilience by providing buffers that keep ecosystem functions stable when disturbances occur. When many species share similar roles, the system has redundancy—if one species is stressed or declines, others can take over its function and keep processes like nutrient cycling, pollination, and primary production going. This redundancy helps the ecosystem weather shocks without collapsing. At the same time, a diverse community brings functional variety. Different species contribute to ecosystem processes in complementary ways, so multiple pathways and interactions support stability even as conditions change. This functional diversity means the system can adapt through different species performing similar tasks in response to stress, keeping services available. Another key piece is response diversity: species react differently to the same disturbance. Some might tolerate drought, others flood, so while some decline, others maintain essential functions. This collective variety makes the whole ecosystem more resistant to change and faster to recover, preserving its structure and services over time. The idea that resilience increases with lower biodiversity or that biodiversity has no effect or only aesthetic value doesn’t fit these mechanisms.

Biodiversity strengthens resilience by providing buffers that keep ecosystem functions stable when disturbances occur. When many species share similar roles, the system has redundancy—if one species is stressed or declines, others can take over its function and keep processes like nutrient cycling, pollination, and primary production going. This redundancy helps the ecosystem weather shocks without collapsing.

At the same time, a diverse community brings functional variety. Different species contribute to ecosystem processes in complementary ways, so multiple pathways and interactions support stability even as conditions change. This functional diversity means the system can adapt through different species performing similar tasks in response to stress, keeping services available.

Another key piece is response diversity: species react differently to the same disturbance. Some might tolerate drought, others flood, so while some decline, others maintain essential functions. This collective variety makes the whole ecosystem more resistant to change and faster to recover, preserving its structure and services over time.

The idea that resilience increases with lower biodiversity or that biodiversity has no effect or only aesthetic value doesn’t fit these mechanisms.