They are the start of a food chain. Animals get all the energy and nutrients they need to live from eating other plants and animals. The animals that eat the producers are called primary consumers.

Algae blooms prevent sunlight reaching other plants. The plants begin to die. Excessive nutrients (nitrates) from fertilisers are flushed from the land into rivers by rainwater. Oxygen levels ...

along with the energy flows and nutrient cycles that sustain life. Ecosystems can be terrestrial (land-based) or aquatic (water-based), ranging from tiny ponds to vast forests. Food chains and ...

Millions of children in America endure a cycle of poverty ... that proper nutrition from all food groups is a foundation for success throughout life. Drinking nutrient-rich milk is an important ...