Which statement best describes the characteristics that enhance ecosystem and community resilience?

• A. Diversity, redundancy, and adaptive capacity enhance resilience.
• B. Uniform species composition and lack of redundancy.
• C. Monocultures and specialization maximize resilience.
• D. Removing ecosystem services increases resilience.

Answer: (B)

Ecosystem resilience grows when a system has diverse species and functions, multiple backups, and the ability to adapt to change. Diversity means many different species and ecological roles, so if one species or process is stressed, others can keep essential functions like pollination, nutrient cycling, and food webs operating. Redundancy means there are several species performing similar roles, so the loss of one species doesn’t cause a immediate drop in ecosystem services. Adaptive capacity is the system’s talent for adjusting to new conditions—learning from disturbances, shifting species roles, and changing management as needed to recover.

Choices that emphasize uniform composition or a lack of redundancy miss these protective features; without variety and overlapping functions, disturbances can cascade and reduce resilience. Monocultures and heavy specialization tend to be vulnerable to pests, extreme weather, or disease because they lack alternatives. Removing ecosystem services would undercut resilience, since those services are the very functions that keep systems healthy and capable of recovering.