Examples of ecology topics include evolutionary ecology, behavioral ecology, population ecology, biogeography and conservation biology. Because ecology is defined as the study of the way organisms interact with each other and their environment, the field covers a broad range of topics.
The study of ecology has origins in the works of ancient Greek intellectuals who studied natural history and concentrated some of their observations on the interactions of wild animals. Over hundreds of years, the study of species interactions grew as scientists became increasingly interested in discovering relationships in the world around them. In 1886, German zoologist Ernest Haeckel coined the term ecology, which has since been used to label a wide variety of interdisciplinary sciences that study organisms and the environment in broader contexts.