How does soil pH affect the distribution of plants in an ecosystem?

Soil pH affects plant distribution by influencing nutrient availability. Many plants thrive in specific pH ranges; for example, acidic soils may limit the growth of certain species that prefer neutral or alkaline conditions. If the pH is too low or too high, it can lead to nutrient deficiencies, affecting plant health and their ability to compete for resources.

This answer is strong because it clearly connects soil pH to nutrient availability and plant health, demonstrating an understanding of how abiotic factors influence plant distribution. The question tests the student's ability to explain the relationship between soil pH and plant ecology.