Question

question 15 of 25
which is a primary disturbance?
a. forest fire
b. snow melting
c. landslide
d. tree falling

Explanation:

A primary disturbance is an event that causes a large - scale removal of organisms from an ecosystem. A forest fire can quickly and drastically change the composition and structure of a forest ecosystem by killing a large number of plants and animals. Snow melting is a natural seasonal process that is not a disturbance in the ecological sense of disrupting the ecosystem structure. A landslide can be a disturbance but is often a secondary effect (e.g., after heavy rainfall which could be a primary disturbance in some cases). A tree falling is a relatively small - scale event compared to a forest fire and is more of a minor change within the ecosystem rather than a large - scale primary disturbance.

Answer:

A. Forest fire