Ecology is the scientific study of the interactions between organisms and their environment. It examines these relationships at different levels, from individual organisms and how they are adapted to their environment, to populations of the same species, the communities of different populations in a particular area, and full ecosystems which include both living and non-living factors.

1. Ecology Scientific study of the interactions of organisms, or groups of organisms, with their environment

2. Organism level – adaptations of one kind of organism to theirenvironment

3. Population level – interbreeding group of organisms of one species

4. Community – groups of populations in a particular area

5. Ecosystem – community plus non-living factors

6. Ecosystem Biotic factors Abiotic factors