An introduction to ecology Introduce the basic concepts involved in ecology. Populations are organisms of the same species within a habitat, and lots of them make a community.
Habitats are smaller areas like a wood or a rocky beach.
An organisms niche is all the information required to define its place in its habitat. The transfer of energy and nutrients through a series of organisms is known as a food chain. Each stage is a trophic level. These are consumed by herbivores and then carnivores. Producers can vary in size, e.g. an oak tree.