Describe resilience in ecosystems and factors that enhance it.

• A. Resilience is the capacity to absorb disturbance and recover; factors include biodiversity, modularity, redundancy, connectivity, adaptive management, healthy soils.
• B. Resilience is the capacity of a single species to resist disease.
• C. Resilience means never changing.
• D. Resilience is measured only by biomass.

Answer: (A)

Resilience in ecosystems is the capacity to absorb disturbance and recover while maintaining the essential structure, functions, and processes of the system. It describes how a landscape or community can endure shocks—like fire, drought, pollution, or climate change—and bounce back, or even reorganize into a stable new state that still supports key services such as productivity, nutrient cycling, and biodiversity. The factors that enhance this resilience work together to keep those functions intact. Biodiversity provides a pool of species that can fill similar roles, so if some are lost others can take over, a concept known as functional redundancy. Modularity helps isolate disturbances within parts of the system, preventing them from cascading everywhere. Redundancy of ecological functions means more backup capacity when some species are impaired. Connectivity allows species and information to move between patches, aiding recolonization and recovery after a disturbance. Adaptive management keeps practices flexible and responsive, using monitoring to adjust actions as conditions change. Healthy soils underpin nutrient cycling, water retention, and productivity, supporting system recovery. So resilience isn’t about never changing; it’s about retaining or reestablishing function and structure after disruption, with multiple interacting factors supporting that goal. Choosing the idea that resilience is about a single species resisting disease, or that resilience means never changing, or that it can be measured only by biomass, misses the broader, ecosystem-scale processes and capacities described here.