Food Webs and Change

A food chain shows one path from food to eater: grass grows using sunlight, a rabbit eats grass, and a fox may eat the rabbit. Real ecosystems are more connected. Rabbits eat more than grass, foxes eat more than rabbits, and many animals share food sources. The connected paths form a food web.

Plants are producers because they make their own food with light, water, and air. Animals are consumers. Fungi and many small organisms break down dead material and return nutrients to the soil. Energy travels through the web, but each part depends on conditions around it.

Suppose a drought leaves less grass. Rabbits may find less food, and predators may have fewer rabbits to eat. But we cannot predict every change from one fact: other plants, migration and human actions matter too. Scientists observe before making a claim about a whole ecosystem.