What is a positive ecological effect of wildfire?

• A. It degrades soil quality
• B. It enriches soil and starts succession
• C. It eliminates all wildlife
• D. It reduces plant diversity

Answer: (B)

Wildfire can act as a positive ecological force by releasing nutrients stored in vegetation and litter and by kickstarting succession. When the fire burns, ash adds minerals like calcium, potassium, and phosphorus to the soil, which boosts nutrient availability for new plant growth. The heat can also break down litter and hard outer seed coats or trigger germination in fire-adapted species, helping new plants establish where competition was previously dense. With the fuel load cleared and canopy opened, more sunlight reaches the forest floor, promoting a dynamic pulse of regrowth, habitat diversity, and a renewed plant and animal community over time.

The idea that wildfire degrades soil quality or eliminates all wildlife or always reduces plant diversity doesn’t fit the usual positive effects seen in many ecosystems. While fire can be destructive, its role in nutrient cycling and creating new habitat is a key reason many ecosystems depend on periodic fires for long-term health and diversity.