An oak tree falls in a forest. It kills some ants and stops grass from growing below it. What type of disturbance is this?
O A. Secondary
O B. Primary
O C. Cyclical
O D. Small

This is O D. Small type of disturbance.

Explanation:

Small-scale biological disturbance.

O D. small

Explanation:

In ecology a disturbance is an event that causes a change in the environment. There are small-scale disturbances and high-magnitude disturbances. Small-scale disturbances are typically driven by biological processes -for example the fall of a tree- while high magnitude disturbances are typically driven by physical processes -for example, storms-. Small-scale disturbances as single-tree blowdowns are very important  to create and maintain diversity and heterogeneity in the forest.

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