The science of ecology, which studies the relationships between organisms and their environments, developed from multiple areas of study. Some of these include ancient Greek observations of natural history, the early work of plant and animal physiologists, and studies of population dynamics.
The term "ecology" was coined by German zoologist Ernst Haeckel in 1866. The work of scientists and academics over hundreds of years in many fields, including biology, environmental science and zoology, laid the foundation for modern ecology. Darwin's theories of evolution changed the ways that researchers approached the ecological sciences, since up to that point, most people viewed the world and its organisms as static.