Ecological levels of organization

1. 4. Ecosystems

1.1. All living things and their physical environments within a particular area

1.1.1. Example: Fish and Water

2. 5. The Biosphere

2.1. The Earth and all of its organisms and environments

3. 1. Individuals

3.1. This level focuses on the relationship between individual organisms and their environment

3.1.1. Example: Human

4. 2. Populations

4.1. The members of a species that live in the same area

4.1.1. Example: Countries

5. 3. Communities

5.1. All of the population in a particular area

5.1.1. Example: Towns