What is an ecosystem?
From a tiny puddle to a vast forest, an ecosystem consists of a living community, its environment and all their interactions. A community is a group of animals, plants and micro-organisms that live together in the same area or habitat. Its environment includes sunlight, rainfall and shelter.
What is biodiversity?
Coral reefs have high biodiversity because they contain large numbers of different species. Deserts have low biodiversity because they have far fewer species. Humans have reduced biodiversity in many ecosystems by harmful activities, such as overfishing.
Why do ecosystems change?
Ecosystems are continually changing, often, very slowly, sometimes very fast. A forest fire, for example, can wipe out an ecosystem without warning. Even so, a new community slowly begins to form. First, short-lived pioneer plants arrive,…
