Why is biodiversity important for ecosystems?

• A. It reduces competition among species
• B. It enhances resilience and productivity of ecosystems
• C. It simplifies food webs
• D. It limits species extinction events

Answer: (B)

Biodiversity is crucial for ecosystems primarily because it enhances resilience and productivity. Diverse ecosystems are better equipped to withstand environmental changes and disturbances, such as climate fluctuations, disease outbreaks, and invasive species. This is due to the variety of species performing different roles within the ecosystem, which allows for a more robust response to stressors. For example, a diverse array of plants can contribute to soil health, while a variety of predators and herbivores can help maintain population balance, ultimately leading to increased productivity in terms of biomass and resource availability.

Furthermore, ecosystems with high biodiversity tend to be more productive because different species can utilize resources more efficiently. This variety can optimize nutrient cycling, energy flow, and overall ecosystem functioning, thereby supporting a richer array of life and enabling ecological processes that benefit all organisms involved.

The other options do not accurately capture the multifaceted benefits of biodiversity. While reducing competition is a potential outcome in some scenarios, it is not a direct benefit of biodiversity. Simplifying food webs is contrary to the nature of complex ecosystems, where interactions can be intricate and beneficial. Limiting species extinction events is somewhat true, as diverse ecosystems may be more stable, but it does not encapsulate the full range of advantages that biodiversity provides to resilience and productivity.