what will happen to an ecosystem that is experiencing a prolonged drought?

Brief Explanations:

A prolonged drought reduces water availability. This leads to plant stress and death, which in turn affects herbivores that rely on them for food. Predators are then impacted as their prey populations decline. Water - dependent organisms in aquatic habitats also suffer due to reduced water levels and quality.

Answer:

Plant death, decline in herbivore and predator populations, and stress on aquatic organisms due to reduced water availability and quality.